Re: [Elecraft] KX3 PO vs actual output.

[Ray WA6VAB]

Hi
Ken. Do feel comfortable troubleshooting the radio ?   Maybe you have a
shorted Fet.  Ray
Wa6vab

On Thu, Oct 24, 2024, 8:53 PM Eric Garner  wrote:

> If you are drawing 6A at 13.8V, something is probably very wrong. Either
> your measurement setup has an issue or there are a lot of watts being
> turned into heat somewhere. Full power should be around 2A.
>
> -Eric KI7LTT
>
> On Thu, Oct 24, 2024 at 9:23 AM Ken  wrote:
>
> > I've always thought it was putting out the 15 watts, or 12 as the case
> may
> > be, since it has all the firmware updates, but looking at the dummy load,
> > it's at 10 watts, if that, with the PO control at 15 watts on all the
> bands!
> > Using 13.8V indicated, at 6A
> >
> > Not sure whats going on but any info appreciated.
> > Thanks, Ken, W2GIW
> >
> >
> > MCU 2.38 / DSP 1.37, 1-3-2015
> >
> > * POWER OUT NOW 15 WATTS MAX, 80-20 M: On 80-20 meters, the PWR control
> > can now be set as high as 15 W (max is still 12 W on other bands). Supply
> > voltage must be over 12.8 V on key-down as indicated by the KX3’s voltage
> > display (tap DISP, rotate VFO B). Note:  The KX3 will automatically
> reduce
> > power as required if current, SWR, or temperature is excessive, or if
> > supply voltage is too low. If a band other than 80-20 m is selected,
> power
> > output will be cut back to 12 W max. It must then be manually set above
> 12
> > W after switching to 80-20 m.
> >
> > __
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>
>
> --
> --Eric
> _
> Eric Garner
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Re: [Elecraft] KX3 PO vs actual output.

[Ray Maxfield]

Hi  All Items Must be Calibrated !
The Load Must be 50  J 0, not an antenna.
The Watt Meter must be Calibrated for the Band or Frequency you are 
Transmitting,
Or your just Chasing your Tail (sorry Old Days saying )
Some watt meters will say  5% +/- one last Digit..

Ray WA6VAB  K3



From: elecraft-boun...@mailman.qth.net  on 
behalf of Ken 
Sent: Thursday, October 24, 2024 9:22 AM
To: elecraft@mailman.qth.net 
Subject: [Elecraft] KX3 PO vs actual output.

I've always thought it was putting out the 15 watts, or 12 as the case may be, 
since it has all the firmware updates, but looking at the dummy load, it's at 
10 watts, if that, with the PO control at 15 watts on all the bands!
Using 13.8V indicated, at 6A

Not sure whats going on but any info appreciated.
Thanks, Ken, W2GIW


MCU 2.38 / DSP 1.37, 1-3-2015

* POWER OUT NOW 15 WATTS MAX, 80-20 M: On 80-20 meters, the PWR control can now 
be set as high as 15 W (max is still 12 W on other bands). Supply voltage must 
be over 12.8 V on key-down as indicated by the KX3’s voltage display (tap DISP, 
rotate VFO B). Note:  The KX3 will automatically reduce power as required if 
current, SWR, or temperature is excessive, or if supply voltage is too low. If 
a band other than 80-20 m is selected, power output will be cut back to 12 W 
max. It must then be manually set above 12 W after switching to 80-20 m.

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Re: [Elecraft] Resonant vs. Non-resonant antennas

[Ray Maxfield]

Al:  How True.. Tuners or Matching Networks Just makes the 
Transmitter. HAPPY !
Less heat and Power reflected back into the Final Network.
Ray WA6VAB  K3.

From: elecraft-boun...@mailman.qth.net  on 
behalf of Al Lorona 
Sent: Wednesday, October 23, 2024 12:11 PM
To: elecraft@mailman.qth.net 
Subject: [Elecraft] Resonant vs. Non-resonant antennas

Here's a true statement: If an antenna is resonant, it radiates no better and 
no worse than a similar-sized antenna that isn't resonant.

First, let's define what 'resonance' is. Remember how impedance Z consists of a 
resistive part and a reactive part? We usually write it like this:

Z = 14 - j80

where Z = impedance
  resistance R = 14 ohms, and
  reactance X = 80 ohms (which in this case is capacitive because of 
the negative sign)

'Resonance' simply means that the reactive part is zero (0). The resistance can 
be any value, but if the reactance is zero, that's a resonant system. So this:

14 - j0

represents a resonant system.

It turns out that whether your antenna Z = 14 - j80, or if your antenna Z = 14 
- j0, the resulting radiation is the same. I'm assuming that there's probably a 
network somewhere in the system to match each of these impedances to 50 ohms.

An antenna doesn't have to be resonant. But if it happens to be resonant, it 
won't radiate any better or worse than if it weren't. Resonant and non-resonant 
antennas can radiate equally well.

You might say, "Well, I choose *not* to use an antenna matching network, so I'd 
rather my antenna be resonant, because that'll result in the lowest SWR."

Yes, but in the case above where the antenna was resonant, the SWR is still 
3.57 to 1, so you would probably want to use a matching network of some kind. 
That doesn't necessarily mean an antenna tuner... you could have a balun, a 
quarter-wave matching section, a trap, a coil, a capacitor or capacitors, a 
transformer, a particular length of transmission line, something like a delta 
feed or a gamma match, a stub, a resistor, or something else.

The thing that got me thinking about this was a thread where somebody was 
bothered that their AX1 antenna (or whatever it's called) wasn't resonant. Or 
maybe you avoid some other antenna because it's 'not resonant'. Just realize 
that whether the AX1 is resonant (reactive part equals zero) or whether it's 
not, it'll radiate the same.

Resonance is the magic that everyone is chasing, even though it doesn't buy you 
all that much. I'll always remember my dad saying, "I'll tell you how long to 
make your antenna: long enough to reach from where it begins to where it ends." 
He understood the relative unimportance of resonance.

Rhombics are non-resonant antennas, but boy do they radiate beautifully. 
Similarly, any other antenna that's not resonant can be made to behave 
beautifully, sometimes by using a matching network or antenna tuner or whatever.

"But I use one of those other methods you just mentioned, instead of an antenna 
tuner which has lots of loss." Careful, your matching device(s) could have just 
as much loss as plain old, properly sized capacitors and inductors.

"But I hate twiddling knobs." Okay, that's fine. Do what you have to do, but 
just don't claim that your 'resonant' antenna is any better than my 
'non-resonant' antenna.

"But if the antenna's non-resonant, the SWR's probably gonna be higher, and 
that means more loss in the transmission line." So use open-wire line.

"But if I use open-wire line, I'm going to pick up more noise."  Not 
necessarily.

"But, but,..."


Al  W6LX/4

P. S. It's actually a false statement that resonance always results in the 
lowest loss with a given transmission line. We pretended it was true so we 
could make our point.

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Re: [Elecraft] OT Rigexpert AA-54 language

[Ray]

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Re: [Elecraft] PTT-Key Settings won't save

[Ray]

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[Elecraft] KPA100W amp and KAT100 Tuner for the K2in an EC2 enclosure

[Ray Spreadbury via Elecraft]

Thanks to all who replied both on here and direct to my Email. I now have
all the info and more that I need for this unit!

Lyle, that Wayback machine is really useful, I didn't know it existed but it
worked fine.

73

Ray G3XLG

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[Elecraft] KPA100W amp and KAT100 Tuner for the K2 in an EC2 Enclosure

[Ray Spreadbury via Elecraft]

I have bought this unit secondhand but unfortunately it came without
manuals. The separate Amp and Tuner manuals are available from the Elecraft
site, but the write up of housing them together in an EC2 enclosure by Lyle
Johnson WA7GXD seems to be not available. 

I have found references to this document which apparently was once at
http://www.fidalgo.net/~wa7gxd/k2kpa100.html  but it is no longer accessible
at this address.

Does anyone have the correct link or a copy that could be sent to me please?

My email is correct on QRZ.

73

Ray G3XLG

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Re: [Elecraft] K4 AM Transmit Bandwith and AM Receive

[Ray]

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Re: [Elecraft] Using the k3 with WITHSJTX?

[Ray]

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[Elecraft] ECN

[Ray Albers]

20 years ago, or thereabouts, when I lived in Northern VA I was a pretty
regular checkin on the Elecraft CW Net with my little KX-1. Amazingly, it
did quite well.

Over the Easter weekend I was once again in NOVA (visiting at my son's
house) and, ever the eternal optimist, I decided to see what I could hear
with my KX-3 and the AX-1 whip (yeah I know, dream on).

Hear K4JPN rock solid. Faint noises from others and the timing suggests
that some of what I heard was most likely Kevin but I couldn't decode
anything.

No surprise, right?  Just thought I'd mention it anyway.   Maybe some day.

73
Ray K2HYD
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Re: [Elecraft] K5 beta testers

[Ray]

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Re: [Elecraft] XV 144 trasnverter for sale

[Ray]

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Re: [Elecraft] Digital mode power handling for KAT3

[Ray]

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Re: [Elecraft] Astron RS-35M Hum

[Ray]

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Re: [Elecraft] Behringer XM1800S Mic Does not work on k3

[Ray]

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[Elecraft] The KIO3B is sold!

[Ray Fallen]

73 de Ray-ND8L
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[Elecraft] KIO3BUPKT For Sale

[Ray Fallen]

Good Day!

I have a new, still sealed in the Elecraft shipping box KIO3BUPKT.
Purchased in July, 2023.  I've decided to stick with my microHam interface.

$475.00 Shipped CONUS.  Save yourself $60.00.

PayPal F&F OK

73, Ray - ND8L
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Re: [Elecraft] Interesting observations after installing antenna switch

[Ray]

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[Elecraft] Buying a K4 in UK

[Ray Spreadbury via Elecraft]

That is excellent news Eric that you hope to appoint to appoint Moonraker as
the UK agent and that they might have a UK service centre.

73

Ray G3XLG

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[Elecraft] Buying a K4 in UK

[Ray Spreadbury via Elecraft]

In the past I have bought Elecraft transceivers and amplifiers both direct
from USA and also through W&S with full satisfaction. On the one occasion in
the last 14 years, when one of my Elecrafts (a KPA500) needed a repair, I
had to send it to Italy, a not inexpensive solution.

 

Sadly, it now appears that W&S and Nevada are no longer independent and have
now amalgamated under Moonraker, not that I have a problem with Moonraker.

 

To continue with a UK Elecraft agency, Moonraker/W&S/Nevada should recruit
and set up a service centre which would alleviate the perceived problem plus
it would provide an alternative service for other makes.

 

The worst of all possible worlds IMHO, would be for the UK Elecraft agency
to end up with so many other radio products in the Staines emporium. Sadly,
...they already have more than enough exclusives thus reducing any
competitive pricing for us, the UK amateur.

 

Ray G3XLG

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Re: [Elecraft] Grounding, Lightning & Attic Antennas

[Ray Maxfield]

If you are using Attic Antenna's ..
 I would focus on the Power lines.
wa6vab Ray k3

On Sat, Jul 29, 2023 at 10:11 AM Rick NK7I  wrote:

> Heh, try Hardee board (concrete) or aluminum siding, or stucco (wire
> based to hold it together).  Or clay brick roofing.
>
> BUT that also contains wifi within the structure for network security hi
> hi.
>
> If the antenna choice is HOA based (yuck, ick, ew) perhaps laying the
> invisible wire ON the roof will work (better) for you (install on a week
> day while everyone is at work/school).  The other issues include potent
> RFI in the building (smoke detectors are great receivers, particularly
> on 40M; GFCI devices are second best).
>
> 73,
> Rick nk7i
>
> On 7/29/2023 9:46 AM, Dr. William J. Schmidt wrote:
> > A bigger concern for attic antennas is the use of "radiation shield"
> plywood on the roof of houses build in the last 10 years or so that turn
> the attic into a Faraday cage.  The single most annoying reason cell phones
> don't work inside your houses anymore.
> >
> >
> > Dr. William J. Schmidt - K9HZ J68HZ
> >
> >
> > -Original Message-
> > From: elecraft-boun...@mailman.qth.net 
> On Behalf Of Steve L
> > Sent: Saturday, July 29, 2023 10:42 AM
> > To: elecraft@mailman.qth.net
> > Subject: [Elecraft] Grounding, Lightning & Attic Antennas
> >
> > Jim & Co.,
> > I’m reading all the recent posts on the Elecraft reflector concerning
> lightning protection…
> >
> > After a recent move, I am working on the design and construction of
> attic antennas for both HF and V/UHF.  The topic of grounding and/or
> providing lightning protection for this installation has baffled me given
> no outside presence of any antenna components.  While not so concerned
> about a direct strike (perhaps naively?) I am concerned about induced
> currents and resulting equipment damage - where clearly disconnection may
> be the best protection.
> >
> > Might anyone have any good references for reading/study on grounding
> recommendations, how to’s, best practices, etc. for attic antennas?
> >
> > Thanks a bunch,
> >
> > 73,
> > Steve
> > AA8AF
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Re: [Elecraft] [OT] A dumb question about lightning

[Ray Maxfield]

FYI..
https://www.repeater-builder.com/tech-info/bonding/amateur-radio-bonding.html
wa6vab  Ray K3

On Fri, Jul 28, 2023 at 5:59 PM David Gilbert  wrote:

>
> I suspect that is the rule rather than the exception.  I have seen
> several satellite and cable TV installations where the installer didn't
> bother to ground back to the service entrance and instead simply drove a
> short rod into the ground at a point closest to the cable gear.
>
> Dave   AB7E
>
>
>
> On 7/28/2023 5:46 PM, Tom Doligalski via Elecraft wrote:
> >
> > Turned out when the cable was brought into the house many years ago the
> > installer failed to adequately ground at the entry point
> >
> >
> > Tom W4KX
> >
>
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Re: [Elecraft] [OT] A dumb question about lightning

[Ray Maxfield]

I worked a Number of Years as a Broadcast Engineer.
The Broadcast Industry has Put this one to bed years ago.
No Need to re-invent the Wheel.   Yes, it will Cost some Dollars
to do it Right, but it can save YOUR Equipment.
Ray WA6VAB K3


On Fri, Jul 28, 2023 at 3:51 PM Rick NK7I  wrote:

> We're in accord on static.  Like lightning, give it someplace to go
> OUTSIDE, not via the shack/structure.  Not just for noise but the
> voltages can be astoundingly high with enough amperage to cause harm.
>
> [A local puts his feeds in a glass jar then is amused at the glow of
> discharge, contained.  But that is FAR from the only wire exposed.
>
> These are complex topics that few can translate well to low dollars
> (hams) and better understanding.
>
> It would have been fun to draw on that lunch crowd discussion.
>
> The only true axiom is that if you don't have enough shunting, lightning
> will be happy to show you what you missed.  (Antenna didn't fall over?
> It's not big enough!).
>
> 73 Bill,
> Rick nk7i
>
>
> On 7/28/2023 3:36 PM, Dr. William J. Schmidt wrote:
> > I worked at Honeywell defense systems in the early 80's and I had two
> guys (Ph.D's from MIT) working in the office next to me that were experts
> in Meteorology... specifically the study of lightning.  I would eat lunch
> with them because they were "interesting" to say the least.  When they
> found out I was a ham and asking them about lightning protection they
> laughed hysterically.  Over their tenure they schooled me on my lack of
> knowledge in their area and beat into me immense gravity and consequences
> of a major lightning strike.  Imaginable voltages and currents.  You can
> prepare but you will never be sure.
> >
> > Static is something else.  All of the antennas I design and implement
> have GROUNDED elements or static chokes to ground to reduce static to a
> minimum.  You learn this with experience.
> >
> >
> > Dr. William J. Schmidt - K9HZ J68HZ
> >
> >
> > -Original Message-
> > From: elecraft-boun...@mailman.qth.net 
> On Behalf Of Rick NK7I
> > Sent: Friday, July 28, 2023 4:42 PM
> > To: elecraft@mailman.qth.net
> > Subject: Re: [Elecraft] [OT] A dumb question about lightning
> >
> > Not often (enough) does a ham have a 100'+ tower either.  😉
> >
> > THE standard (of way so many to choose from) is from the cell phone
> industry (Motorola mostly).  It's insanely complex but if you're on a
> mountain top and need 100% reliability; ideal.  The costs, will be a second
> mortgage so some compromises will have to happen.
> >
> > Here is a better link to the current (newest edition) of the ARRL book;
> at least a good starting point for a baseline understanding.  Direct hits,
> no matter what system/s used, will always show what you missed or didn't do
> enough to mitigate.
> >
> > https://a.co/d/01vRC1W
> >
> > Another aspect is static reduction.  That comes from wind, rain, dust,
> snow, anything that passes by the structure.  Shunt all to ground OUTside
> the building is the best approach.  (Base of the tower/mast and again at
> structure entry; make EVERYTHING at the same ground potential, inside and
> out.  When you take a hit, that potential rises, equally if all is done
> well; it's the difference in potential that harms.)
> >
> > 73,
> > Rick nk7i
> >
> > On 7/28/2023 2:31 PM, Dr. William J. Schmidt wrote:
> >> Even the methods in that book are considered sub-standard by the
> broadcast industry...  The only think that is a sure bet is to completely
> disconnect your radio and put it back in the shipping box.
> >>
> >>
> >> Dr. William J. Schmidt - K9HZ J68HZ
> >>
> >> email:  b...@wjschmidt.com
> >>
> >>
> >> -Original Message-
> >> From: elecraft-boun...@mailman.qth.net
> >> 
> >> Sent: Friday, July 28, 2023 4:14 PM
> >> To: j...@kk9a.com
> >> Cc: Elecraft@mailman.qth.net
> >> Subject: Re: [Elecraft] [OT] A dumb question about lightning
> >>
> >>
> >> https://www.googleadservices.com/pagead/aclk?sa=L&ai=DChcSEwiOk5PAqLKA
> >> AxUjEa0GHYmDBJgYABACGgJwdg&ae=2&ohost=www.google.com&cid=CAASJORo_AZEA
> >> zrEwZh7d0CRaunieFV8dsSC3IDZqsPWbucgX_uNKQ&sig=AOD64_1qxgTjvgwY4_QbQuPW
> >> 5KxSnoObmA&q&adurl&ved=2ahUKEwiEsI3AqLKAAxViAjQIHe9mC-UQ0Qx6BAgOEAE
> >>
> >> Welcome to the Bible of grounding.   It’ll take several reads to grasp
> what you have to do.
> >>
> >> 73,
> >> Rick NK7I
> >

[Elecraft] [Electraft] K2/10

[Ray Spreadbury via Elecraft]

Hi Allan

Check out your QRZ Email. 

I sent you a message re your K2 this morning

73

Ray G3XLG

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Re: [Elecraft] ELECRAFT K3-F P3-F.

[Ray]

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[Elecraft] Muting the K2

[Ray Spreadbury via Elecraft]

My thanks for the helpful comments and suggestions received both on the list
and by private Email

Ray G3XLG

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[Elecraft] Muting the K2

[Ray Spreadbury via Elecraft]

Thanks Fred for the suggestion of using a Dow-Key relay, but they seem to be
unavailable in UK/Europe except on Ebay secondhand for $120 or more & those
are mostly 24V rather than 12V. 

Are there any alternatives

Ray G3XLG

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[Elecraft] Muting the K2

[Ray Spreadbury via Elecraft]

I am thinking of building a low power QRP valve transmitter (e.g. 1 or
perhaps 2 6V6's/6L6's) for use in the G-QRP club valve activation weekends -
output 5 to 10W. 

Many of such circuits are using a crystal oscillator, but I plan to build a
Nano digital VFO in place of the crystal to have more frequency flexibility.

If I use my K2 as the receiver, will it be sufficient when transmitting, to
switch the antenna to the transmitter and ground the K2 antenna port to
avoid damage to the K2?

73

Ray G3XLG

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Re: [Elecraft] K3 s/n 2324 ZERO Power Output after repair

[Ray]

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Re: [Elecraft] K3 s/n 2324 ZERO Power Output after repair

[Ray]

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Re: [Elecraft] Elecraft support and communication

[Ray]

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[Elecraft] Using KPA1500 with Flex6600

[Ray Spreadbury via Elecraft]

Thanks guys for all the advice & helpful suggestions. The KPA1500 is now 
working correctly with the Flex and as I want to use it below my desk, it is 
now beiung controlled using the KPA1500 Remote Ap
73 Ray G3XLG

Sent from Mail for Windows

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[Elecraft] Using KPA1500 with Flex6600

[Ray Spreadbury via Elecraft]

Dave, thanks for the tip to use the KPA1500 Remote Ap which I have now 
downloaded. Now I have to try to connect to it using a USB cable to the PC
Ray G3XLG

Sent from Mail for Windows

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[Elecraft] Using KPA1500 with Flex6600

[Ray Spreadbury via Elecraft]

I am just getting a Flex6600 to replace my Elecraft transceiver and intend 
connecting the Flex radio to the amp using an Elecraft KXUSB cable ie. FTDI USB 
to Serial, which I believe is the recommended method for auto band switching of 
the KPA1500.
Is there software available for controlling the KPA1500 on my Windows PC as I 
would like to locate the amp below my operating desk? I suspect I can do this 
using the KPA1500 Utility program but wondered if there is a better method or 
3rd party software for this purpose?
73
Ray G3XLG

Sent from Mail for Windows

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Re: [Elecraft] K3 50MHz power out

[Ray]

To measure RF  power accurately, it needs to be into a Known Impedance.
  I would run the RF Calibrate Test, in the K3 Utility program. 
Ray WA6VVAB K3

Sent from Mail for Windows

From: Josep via Elecraft
Sent: Monday, June 6, 2022 7:32 AM
To: Elecraft Reflector
Subject: [Elecraft] K3 50MHz power out

My K3 seems to send out ~50w (1.5:1 SWR) to the antenna. If I connect a dummy 
load, ~40w (1.1:1 SWR).Should it send out more RF power or this is what is 
expected.? I thought I read it should be something around 90w (?)
Any suggestions.?
Thanks,


73, 
JosepEA6BFMyWebsiteBUG #256  -  CWOps #3072  -  FOC #2182 (ex 1724)
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Re: [Elecraft] KAT 500 and the Yaesu FTDX10

[Ray]

Did Elecraft  make a FTdx Series of Radio Equipment ???
I Must have missed it.  Did I sign in to the Wrong thread……….. 

Ray WA6VAB  Elecraft K3  


From: Joe Subich, W4TV
Sent: Thursday, May 5, 2022 12:39 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KAT 500 and the Yaesu FTDX10


To which connector did your KAT500/FTdx1200 tuner cable attach?

The Tuner jacks are the same on both FTdx1200 and FTdx10 as are
the "Linear" jacks.


73,

... Joe, W4TV


On 2022-05-05 3:17 PM, Greg Chartrand via Elecraft wrote:
> I just purchased a ftdx10 and wondered if the band data cable is the same as 
> the one I had with my old ftdx1200.
> Thanks,W7MY-Greg ChartrandRichland, WA.


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Re: [Elecraft] Follow-up to OT

[Ray]

Jim
I found the (so called Optimizers) to be VERY Noisy when the Sun is Just 
starting to hit the Solar Panel ARRAY 
and the Optimizer it Trying to Balance the Current (load) of ALL the  panels.
I would Bet the FCC Test are being Run when the Sun is Either Full ON or Full 
OFF, Not in its Full Dynamic Switching Mode.
Ray WA6VAB K3 (sum what Retired) 


From: Jim Brown
Sent: Saturday, April 30, 2022 10:26 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Follow-up to OT

On 4/27/2022 2:45 PM, jerry wrote:
> Samlex inverters

These inverters are NOT quiet.  Slide 213 in this pdf shows what I had 
to do to kill the trash coming out of their SMALLEST one to use it to 
power the logging computer for HF mobile contesting!

http://k9yc.com/KillingRXNoiseVisalia.pdf

  My partner in these events, W6GJB, bought one or two sizes up; it was 
MUCH worse, and there was nothing we could do to make it usable.

FCC Part 15 Class B is still a very loose RFI spec, and the specified 
testing setups fail to reveal the design and construction errors that 
can cause massive radiated trash.

73, Jim K9YC
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Re: [Elecraft] KWM-380 (was K4 and Delivery Delays)

[Ray]

I unfortunately worked for the DoD,
And we had Many of the KWM-380’s-- Many Problems !

Ray WA6VAB

From: Ed W0YK
Sent: Sunday, April 3, 2022 4:32 AM
To: Bill Tippett; Elecraft Reflector
Subject: Re: [Elecraft] KWM-380 (was K4 and Delivery Delays)

I'm not surprised.  The receiver is chock full of internally generated birdies. 
 On a dead band, a bandscope looks like a major contest!73,Ed W0YK
 Original message From: Bill Tippett  
Date: 4/3/22  03:12  (GMT-08:00) To: Elecraft Reflector 
 Cc: e...@w0yk.com Subject: KWM-380 (was [Elecraft] 
K4 and Delivery Delays) W0YK wrote:The KWM-380 may have been a "hot radio" in 
some people's minds, but I can personally attest to the opposite.  I have one, 
along with a number of KWM-2As and S-Lines.  The 380 is a horrible performer.  
The receiver is incredibly noisy, obstructing reception of all but the loudest 
signals.  The audio is distorted and filtering is poor.  Collins' last hurrah 
was a dud.Hi Ed, I don't recall ever telling you this but your 380 also had 
horrible TX phase noise.  In the early 80s, we were located within 5 miles of 
each other in CO, both running amps.  Whenever you transmitted on 80 or 160, 
the phase noise would cover the entire CW bands.  I don't recall what you 
replaced the 380 with but I was a very happy camper when you did!I take pride 
that my KSYN3A-updated K3 is still one of the cleanest CW signals on the 
bands.73,  Bill  W4ZV  (ex-W0ZV)
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Re: [Elecraft] Heat Sink Compound Question

[Ray]

Chuck……. Great information for the K3 Radio’s  
Ray WA6VAB   K3 


From: Charles K0MV
Sent: Tuesday, March 29, 2022 6:30 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Heat Sink Compound Question

Hi Tony,

I posted this reply last November.

This topic appeared on the list previously from last October "sticky 
thermal pads for K3 LPA Mosfets".

One of my LPA Mosfets went bad in my K3s.  I saw a comment on the 
reflector about these devices failing and I'm guessing the heat sink 
design is subject to production variation.  I used to design switching 
power supplies.  Reliability is a very strong function of device 
temperature so keeping cool is important.  I hate to take time to fix 
stuff, so try to fix it so it never fails again.  I replaced both of 
them but also improved the thermal design.  As Ray WA6VAB mentioned, I 
got mine from RF Parts.

The epitome of outstanding thermal design is the Intel I7 processor heat 
sinking.  The processor and the heat sink are polished, shiny, and very 
flat.  The best thermal compound is a silver based paste included with 
the heat sink.  It does 100 watts over a couple of square inches so very 
low thermal resistance (remarkable!). Any gaps compromise the performance.

There is a very good tutorial on this here: 
https://forum.digikey.com/t/thermal-interface-materials

I examined the bottom cover and found the surface of the metal to be 
uneven and this inhibits heat transfer (raises the thermal resistance). 
I also found the bottom cover may not be perfectly flat. Moreover, the 
typical flexible thermal pads are not as good as alternatives.

I polished the K3s bottom cover where the heat sink attachments are with 
a Dremel tool and polishing pad and automotive rubbing compound, a fine 
abrasive.  You can see it becomes more shiny and I verified that with a 
microscope.

I got a larger diameter flat washer for placing under the screw head on 
the outside of the K3s.  This places compression over a larger area to 
help heat transfer.  Digikey part number H734-ND.

Since Elecraft has different board revisions you should check that the 
tabs of the MOSFETs can be grounded.  If so, then there is a type of 
thermal pad that is very good.  From the data sheet: High-PERFORMANCE, 
cost effective thermal interface material Used where electrical 
isolation is not required, Tgon TM 800 is ideal for where electrical 
contact and thermal transfer are desired. High thermal conductivity of 5 
W/mK in Z axis and 240 W/mK in the X-Y axis.  This type not only has low 
thermal resistance across it, but also a low thermal resistance in the 
plane of the pad helping to spread the heat out.  Digikey part number 
926-1471-ND manf part number A15037-112.  Use just a very small amount 
of the silver based thermal compound.

I run FT8 so the duty cycle is 50%.  It's been several months and no 
problems (1000s of QSOs)--at least yet!

Good luck and 73,

Chuck K0MV
On 3/29/22 15:24, Tony wrote:
> All:
>
> It seems that thermal compounds are not all the same and I was 
> wondering which type is best to use for transceiver applications? I 
> understand Elecraft uses thermal pads these days, but what type of 
> compound was used prior to the switch?
>
> Just purchased a produced called MX-5 from Arctic which is commonly 
> used for CPU applications and was wondering if it can be used for HF 
> transceivers, kits etc.
>
> See: 
> https://www.amazon.com/gp/product/B08T64M68V/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&th=1
>
> Thanks,
>
> Tony
>
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-- 
Charles K0MV
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Re: [Elecraft] 80-meter Antenna Fun

[Ray]

I think the DX window is 3.790 +/-  .
WA6VAB  K3  Ray


From: Richard
Sent: Thursday, February 17, 2022 9:05 AM
To: Elecraft Mailing List
Subject: [Elecraft] 80-meter Antenna Fun

I’m in the process of tuning a just-finished 80-meter “triangular loop.” So 
far, the early signs are encouraging.

I will use this for SSB exclusively. Being “new” to 80, I don’t yet know the 
territory.

The antenna has a narrow 2:1 bandwidth, and my main interest is DX.

What would be a good center frequency for 80-meter SSB DX?

Thanks.

Richard — W4KBX
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Re: [Elecraft] When is a Key Out not a Key Out

[Ray]

When in Dough Read the manual. 
WA6VAB Ray K3  


From: Bob Wilson, N6TV
Sent: Friday, February 11, 2022 12:10 PM
To: Pete Smith N4ZR; Elecraft Reflector
Subject: Re: [Elecraft] When is a Key Out not a Key Out

Elecraft and ACOM amplifiers have a jack labeled KEY IN, so connecting KEY
OUT to KEY IN makes the most sense.  Alpha and SPE amps call it a RELAY
jack, but most rigs and some QSK amps don't use actual T/R relays any
more.  A few amps have a jack labeled PTT (RF Kit, Juma).  If you connect a
PTT jack on a rig to the PTT jack on these amps, obviously that won't work
unless both are wired in parallel to a footswitch or PTT circuit to key
both simultaneously, but then you can't use VOX.

Yaesu rigs key amps using a jack labeled TX-GND.  Icom labels it SEND.
Kenwood rigs use a RL pin on a DIN plug labeled REMOTE.  KEY OUT makes much
more sense than any of these labels IMHO.

Any jack on a *rig* labeled PTT is an input, not an output.  I can't think
of any modern rig that has a jack labeled "PTT OUT".

73,
Bob, N6TV

On Fri, Feb 11, 2022, 6:49 AM Pete Smith N4ZR  wrote:

> Recently, I've been dealing with an issue involving the PTT out
> connection on my K-3.  Somewhere in the process, I realized that
> Elecraft's terminology is to call this port Key Out.
>
> With all due respect, this is Citizen's Band terminology, usually
> encountered in the context of statements from the late, unlamented CB
> power competitions, like "I keyed up my radio, and blew out his
> receiver." We key our radios for CW - it is not a synonym for PTT. It's
> kind of embarrassing to see it in messages about the very best amateur
> radio gear available today.
>
> --
> 73, Pete N4ZR
> Check out the new Reverse Beacon Network
> web server at <http://beta.reversebeacon.net>.
> For spots, please use your favorite
> "retail" DX cluster.
>
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Re: [Elecraft] HI CURR indicator on K3S display

[Ray]

Dr William………. 
Time to hook your radio up to a 50 Ohm Dummy Load, and Retake readings.
Ray WA6VAB  K3


From: Dr. William J. Schmidt
Sent: Tuesday, February 1, 2022 6:40 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] HI CURR indicator on K3S display

Unfortunately, my metering outside of the radio shows only 10.1 amps when the 
radio shows 20+ amps.  Radio and outboard voltage metering showing 13.0 VDC.  
Also shown 6.6A for 5W out.  Something is up.


Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ 
VP2EHZ

email:  b...@wjschmidt.com


-Original Message-
From: William Ferry  
Sent: Tuesday, February 1, 2022 7:01 PM
To: b...@wjschmidt.com
Subject: Re: [Elecraft] HI CURR indicator on K3S display

I recently had a problem where both my K3’s were taking over 30Amps (PS) and at 
times the K3 shut down.  
Surprisingly it happened with two different K3’s and two different power 
supplies (Astron RS 35 and M).  The K3 displays all read just over 20 Amps at 
near 100w output into a dummy load on both units.  I checked with Elecraft and 
they had high confidence the current read by the K3 was correct.
I decided to borrow a clamp-on Ammeter to measure the DC current independently. 
Yup. 20+ amps (like the K3)before it shut down.  
I found both supplies had issues.  One the current limit was set too low.  The 
other the current sensing resistor had been changed to the wrong value.  Plus 
the current meter were not calibrated correctly.  
Hence I suggest you find a meter to independently measure the power supply.
Regards,
Bill
K1BZM
PS I think we have worked on all bands from 80-6!



Sent from my iPhone

> On Feb 1, 2022, at 7:14 PM, Dr. William J. Schmidt  wrote:
> 
> I remember some discussion about HI CURR issues and the causes here a 
> while ago.  I just noticed it on my radio.. Changing the display to 
> read amps, it indicates 21.6 amps, but the amp meter on the power 
> supply is only showing
> 10.1 amps.  The radio sensing circuit seems to be in error.  Anyone 
> else delt with this?
> 
> 
> 
> 
> 
> Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ 
> PJ2/K9HZ VP2EHZ
> 
> 
> 
> email:   <mailto:b...@wjschmidt.com> b...@wjschmidt.com
> 
> 
> 
> 
> 
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> jdbf...@comcast.net

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[Elecraft] K4D Data Connector for KPOD

[Ray Spreadbury via Elecraft]

Where is this Data Connector located on the K4 ? 
The KPOD documentation only refers to the K3 & K3S and is not updated for the K4
73 Ray G3XLG

Sent from Mail for Windows

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Re: [Elecraft] On ground - in ground radials

[Ray]

I found Lots of SNAKES in Texas !
WA6VAB   Ray K3 


From: Fred Jensen
Sent: Monday, January 17, 2022 1:34 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] On ground - in ground radials

Yes.  A long time ago on the engineering crew at KSBY-TV, the station 
would rent us out to some of the AM stations who did not have a resident 
engineer, usually when something quit or when their PoP came due.  
Mostly 5 and 10 kW, usually directional, at least at night.  These 
stations were required to have at least 120 radials.  They were also 
required to have those 120 radials connected to the matching network 
ground.  It was common to have a conductive grid out from the base of 
the tower(s)  with the radials connected to the outer edge since 120 to 
a single point is a bit hard physically.  Each tower had it's own grid 
and radial field.  After a few visits, I discovered:

1.  They usually didn't want to me to go out to the tower(s) to inspect 
it/them and the matching network(s). "Snakes" was the excuse.

2.  After insisting on going and that someone accompany me or we 
couldn't complete the PoP, I usually found that no one had been out 
there in years, the matching/phasing networks were full of bugs, webs, 
weeds, and corrosion, and of the radials I could find, some were 
connected, some had corroded away from the connection, and some couldn't 
be found.  Never encountered a snake.

I guess they were faking their PoP's, and maybe continued to do so 
because we weren't hired again by a couple of them.

73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

Jim Brown wrote on 1/17/2022 12:44 PM:
> Just out of high school, I had a summer job at WSAZ, a 5-kw with a 
> 4-tower array, with the same ground screen/raidal configuration on 
> each tower, silver-soldering those radials.
>
> 120 radials was a legal requirement of FCC Rules, and was primarily 
> for standardization of performance.
>
> 73, Jim K9YC
>
> On 1/17/2022 9:28 AM, George Danner wrote:
>> Mike,
>> When I was an AM radio broadcast engineer in the 60s & 70s, we used a
>> copper screen for the first 20' to 50' around the tower base and silver
>> soldered all the 1/4 wavelength radials to the common point straps and
>> several places along the screen. This was in Florida with sandy soil. I
>> seemed to remember from my 1st Phone exam that 120 radials were 
>> required.
>



-- 
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Re: [Elecraft] Cleaning solder flux

[Ray]

I worked at a large Computer Company in Cupertino, and we used Water Soluble 
Flux,
Then washed the Boards in a Dishwasher, with Water.
Open Air Drying to keep water from Wicking into any Parts.

Ray WA6VAB  Engineering.  K3 



From: Hal Massey
Sent: Sunday, January 2, 2022 9:11 AM
To: Jim Bruce
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Cleaning solder flux

In an SMT production facility that was in the home city of Elecraft 
(Watsonville, CA) we went to aqueous wash very early on. I was on the design 
engineering side in Cupertino, CA but I can probably connect with some of those 
Manufacturing Engineers. I remember it well because the design side had to 
select components that would allow for this.  This was the former Tandem 
Computers, Inc. manufacturing line. The company’s president and founder was 
Jimmy Treybig- W6JKV. 

> On Jan 2, 2022, at 9:47 AM, Jim Bruce  wrote:
> 
> In all of the places I worked beginning with the Air Force we used
> isopropyl alcohol to remove flux from repairs on boards with the exception
> of one. At I believe General Radio(GenRad) in Rockville, Md we used banana
> oil for flux removal.
> 
> Has anyone else used something other than alcohol??
> 
> Jim/W3FA
> 
> On Sun, Jan 2, 2022, 10:13 Dr. William J. Schmidt 
> wrote:
> 
>> During my under-graduate and graduate school careers, I worked at
>> Honeywell's circuit board fabrication shop for about a year and a half.  We
>> had two machines in the shop that dealt with flux: a reflow machine and a
>> parts set machine.  The reflow machine was used to reflow the solder after
>> plating so that it looked shiny.  The board was emersed in a 601-type flux,
>> heated to about 425F, cooled down, and then scrubbed (brushed) with
>> Isopropanol alcohol three times (stages) with a water rinse and force-air
>> dried (all automagically).  The solder was beautiful and shiny at the end
>> of
>> this process.  The parts-setting machine was similar... the whole
>> (pre-reflowed) board was fluxed, the parts set, heated, and then cleaned.
>> All fluxes come off with Isopropanol alcohol (remember IPA is polar like
>> water and works that way).
>> 
>> 
>> 
>> Fluxes come in various forms... some are more corrosive and some not... so
>> you should follow the directions (right off the website).  Rosin can remain
>> on a board, but also can be problematic because it can collect debris (dust
>> and other unwanted materials) because its plastic (flows at room
>> temperature) sticky.  Many of the water-soluble fluxes are more acidic, and
>> will tarnish the solder joints if not removed.
>> 
>> 
>> 
>> On the subject of using water on electrical components... most components
>> (particularly if they might be mil spec) are made for water emersion (NOT
>> ALL!).  In my office lab we routinely clean circuit boards by scrubbing
>> them
>> with just water and force-drying them.  Works fine.  About a decade ago, I
>> used to buy up surplus AM/ broadcast band transmitters for repurposing to
>> other countries (mainly south America) for the Christian broadcasting
>> markets.  Once back at my shop, the first stop was a good through power
>> washing in the driveway (paper and other water damaged goods removed of
>> course) followed by a good drying (leaf blower).  Works fine!
>> 
>> 
>> 
>> 
>> 
>> Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
>> VP2EHZ
>> 
>> 
>> 
>> 
>> 
>> --
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Re: [Elecraft] Simulated stereo

[Ray]

The K3 Does have a Similar Ckt.
Press the AFX button on the Key pad.

WA6VAB  K3


From: Victor Rosenthal 4X6GP
Sent: Sunday, December 26, 2021 12:28 PM
To: Julia Tuttle; jerry
Cc: Elecraft
Subject: Re: [Elecraft] Simulated stereo

Yes, that would be great. The K3 doesn't do that, unfortunately.
The K2 and my other non-Elecraft rigs don't have the 'presence' that the 
K3 gets from the ability to insert a slight delay on one side.

73,
Victor, 4X6GP
Rehovot, Israel
CWops #5
Formerly K2VCO
https://www.qsl.net/k2vco/
On 26/12/2021 19:57, Julia Tuttle wrote:
> I thought this was one of the stereo effects the KX3 did already.
> 
> On Sun, Dec 26, 2021, 12:52 jerry mailto:je...@tr2.com>> 
> wrote:
> 
> So how about a stereo effect where the position of the signal
> depends on
> its frequency?
> Low frequencies on the left, high to the right.  A linear progression
> across
> your head?
> 
>                    - Jerry KF6VB
> 
> 
> On 2021-12-25 22:59, Victor Rosenthal wrote:
>  > I'll try that. I was also thinking some kind of reverb device
> could be
>  > used to insert a variable delay on one side.
>  >
>  > 73,
>  > Victor, 4X6GP
>  > Rehovot, Israel
>  > CWops #5
>  > Formerly K2VCO
>  > https://www.qsl.net/k2vco/ 
>  >
>  > On 26/12/2021 3:47, Joe Subich, W4TV wrote:
>  >>
>  >> On 2021-12-25 6:46 PM, Douglas Hagerman via Elecraft wrote:
>  >>
>  >>> Some of the various Heil headphones, including the one on the
>  >>> Elecraft site, have a switch that passively selects between
> mono and
>  >>> simulated stereo by changing the phase between the two sides.
>  >>
>  >> Any *Stereo* headphones can accomplish the same thing by simply
> adding
>  >> a DPDT switch wired to reverse the connections (invert polarity) to
>  >> one of the two ears.
>  >>
>  >> 73,
>  >>
>  >>    ... Joe, W4TV
>  >>
>  >>
>  >> On 2021-12-25 6:46 PM, Douglas Hagerman via Elecraft wrote:
>  
>   The K3 (and I think the KX3 and K4) has a simulated stereo
> function
>   which allows you delay the audio to one channel slightly, which
>   makes
>   signals seem to stand out from the noise. I believe that the
> radios
>   newer than the K3 also have the ability to create stereo
> separation
>   by
>   pitch, which helps in picking out CW signals in QRM.
>  
>   My question is: is there some kind of device that you can get
> that
>   will
>   take the monaural audio from a non-Elecraft radio or a K2 and
>   produce
>   similar effects?
>   -- 73,
>   Victor, 4X6GP
>   Rehovot, Israel
>   CWops #5
>   Formerly K2VCO
>   https://www.qsl.net/k2vco/ 
>  >>>
>  >>> Some of the various Heil headphones, including the one on the
>  >>> Elecraft site, have a switch that passively selects between
> mono and
>  >>> simulated stereo by changing the phase between the two sides. It
>  >>> basically seems to widen the perceived space of the sound source,
>  >>> possibly helpful.
>  >>>
>  >>> Doug, W0UHU.
>  >>>
>  >>
>  >> __
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Re: [Elecraft] K3 Frequency Calibration

[Ray]

Gents
Go to a WWV signal, (5.00)  on a Good Strong Frequency.
Place the Mode To Upper SSB, Listen to the Beat note Tone Freq,
Now Move the Mode to Lower SSB. Adjust the  Ref. Cal. Osc. until the Beat Note 
is the Exact Same Freq
On Lower SSB and Upper SSB.   Done  
Ray WA6VAB  K3 


rom: Wes
Sent: Thursday, December 16, 2021 3:24 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 Frequency Calibration

What are you using it for?

Wes  N7WS

On 12/16/2021 3:18 PM, John Stengrevics wrote:
> Hi Pete,
>
> The WWV method worked for me until it didn’t.  On the advice of one of the K3 
> gurus, I am now using a Leo Bodnar frequency source.  Works great.
>
> 73,
>
> John
> WA1EAZ
>
>> On Dec 16, 2021, at 4:34 PM, Pete Smith N4ZR  wrote:
>>
>> I've been wondering for some time if my 10-year-old K3's frequency 
>> calibration was off, because it seemed like most spots of me were well off 
>> when I clicked on them, usually in one direction.  Not having a frequency 
>> counter, I went to the alternative method outlined in page 49 of the manual. 
>>  I thought I did it all "by the book", but found that when I was done 15-MHz 
>> WWV's carrier frequency (determined by zero-beating the carrier) was almost 
>> 400 Hz low. Since I wasn't looking for FMT-level accuracy, I went back to 
>> WWV and adjusted the REF CAL setting by ear until 15.000 on my RX dial was 
>> as close to zero-beat with WWV as I could tell. We'll see how it worked out, 
>> but I wonder if I simply have some fundamental misunderstanding of what's 
>> involved.  Wouldn't be the first time...
>>
>> -- 
>> 73, Pete N4ZR
>> Check out the new Reverse Beacon Network
>> web server at <http://beta.reversebeacon.net>.
>> For spots, please use your favorite
>> "retail" DX cluster.
>>

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Re: [Elecraft] K3 Noise Reduction

[Ray]

I am Not a big fan of the K3 Noise reduction !
NB work OK, but NR is Poor!

That’s My 2 Cents worth.  Ray WA6VAB


From: Alan Higbie
Sent: Wednesday, December 15, 2021 7:46 AM
To: David Hachadorian
Cc: Reflector Elecraft
Subject: Re: [Elecraft] K3 Noise Reduction

I too was skeptical about finding ANY improvement to s/n ratio under
contest conditions.

A couple of years ago, I was confronted with some S-7 broadband
digital-like RFI while using my K3 in an extremely urban environment.  But,
using BOTH NB and NR and fiddling with settings eventually allowed me to
operate and to make a whole bunch of contest QSO’s in CQWW CW.

It is possible - but still unpleasant.

73, Alan K0AV





On Wed, Dec 15, 2021 at 8:15 AM David Hachadorian 
wrote:

> For 12 years I've tried to get any enhancement of s/n from the K3 IF/RF
> NB and NR.  I haven't seen one case where there is any improvement under
> contest conditions.  When the s/n just starts to improve, the desired
> signal is modulated and degraded by nearby signals to the point where
> reception is better with NB/NR turned off.  As far as I can see, both of
> these features are useless on the K3 under contest conditions.
>
> Dave Hachadorian, K6LL
> Yuma, AZ
>
>
> On 12/15/2021 7:36 AM, Pete Smith N4ZR wrote:
> > Last weekend during the 10 meter contest I was experiencing very loud
> > line-noise-like interference when my antenna was pointing south. I
> > tried both my K3's Noise Reduction and Noise Blanker functions, and
> > was unable to find any setting that gave useful relief.  With the
> > noise blanker, in particular, I noticed that when it was on, not only
> > was the buzz still very strong, but it seemed as if all CW signals on
> > the band were being hum-modulated.  As soon as I turned off the noise
> > blanker, the CW signals cleaned up.  Is there something wrong with my
> > radio, or an adjustment issue, or is this interference simply too
> > strong?  Obviously, I'll be trying to track it down, but it's not
> > there all the time, so that could be tough.
> >
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Re: [Elecraft] P3 Issue

[Ray]

Ken an Mike
I did some Troubleshooting over the Years.
2 thing to help.

I understand that there is an App for the I-Phone that 
Lets you see a Heat/IR Pattern on the screen.
This should help SEE a Heated Part.
The 2nd is, get a Can of Component Cooler/
Freeze Spray to Shoot the Hot Part and see
The Problem recovers.
I wou;ld Clean All Cables, Sockets and Plugs
Power Supply Connections FIRST.

Ray WA6VAB  K3  

From: Michael Carter
Sent: Monday, November 29, 2021 9:08 PM
To: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] P3 Issue

Ken,

I have not experienced the difficulty
with my P3 that you encountered,
but the fact that both the P3 front
panel display and the external SVGA
display shut down indicates a problem
with data not being provided to either
display driver system OR there is a
thermal problem with one of the
onboard voltage regulators on the P3
Rear Panel I/O board.  The P3 has
both +5V and + 3.3V regulators with
crowbar over-voltage protection, and
both are fed from the +12V DC input
jack.  The P3 SVGA board has additional
voltage regulators supplying 1.2, 2.5, and
3.3V, and these are fed from the +5 V
regulated supply on the P3 Rear Panel I/O
board.

My suspicion is a thermal sensitivity
in the +5 V regulator or its crowbar
protection circuit.  However, I would
first check the +12V DC input connection
to the P3 and be sure that it is stable
at +12V over time.  If you supply that
voltage from the auxiliary +12V output
of a K3 or K3s, you should also check
that the problem doesn't stem from
a problem inside the transceiver.  My
recollection is that a modification
was required in the original K3 to
increase the available current at the
auxiliary +12V DC output to support
the SVGA option in the P3.

I am curious to know what you find...

73,
Mike, K8CN
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Re: [Elecraft] Need K3 Board

[Ray]

Its done Every Day.
Look at Russia and China !
Yes, it takes a very Special Skill set.. 
Ray WA6VAB K3 



From: David Gilbert
Sent: Friday, November 26, 2021 3:37 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Need K3 Board


Would you try to replicate that board from that schematic without having 
access to the artwork for the board??  No frigging way.  It has to fit 
into a fairly small space.

Dave   AB7E


On 11/26/2021 3:53 PM, Ray wrote:
> The schematic is Published, Check the Elecraft K3 site.
> Ray WA6VAB K3
>
>

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Re: [Elecraft] Need K3 Board

[Ray]

The schematic is Published, Check the Elecraft K3 site.
Ray WA6VAB K3


From: Julia Tuttle
Sent: Friday, November 26, 2021 2:27 PM
To: Fred Jensen
Cc: Elecraft
Subject: Re: [Elecraft] Need K3 Board

I can see that for the radios themselves, but something like an IO board
seems less likely to have competitively clever design tricks in it.

I can also see keeping the designs of even simple expansion boards secret
while the radio is actively being sold, since cheaper clones would threaten
the profit needed to recoup the R&D on the boards, plus the clones might
use inferior parts.

But it does seem like, at this point, releasing a schematic and board
design would be helpful to users with less downside to Elecraft.

73,

Julie

On Fri, Nov 26, 2021, 16:50 Fred Jensen  wrote:

> Hmmm ... Elecraft has a very significant investment in those data [often
> called Intellectual Property].  Can't really see them just giving it
> away.  Likewise computer codes.  I'm not at all surprised that they're
> holding their IP close to the chest.
>
> 73,
>
> Fred ["Skip"] K6DGW
> Sparks NV DM09dn
> Washoe County
>
> David Gilbert wrote on 11/26/2021 8:45 AM:
> >
> > I wish that Elecraft would make available the board layout, parts
> > lists, etc that would allow somebody to replicate these boards. Even
> > if nobody wanted to produce them commercially, there are a raft of
> > prototype houses that would build a one-off version at a reasonable
> > price ... at least "reasonable" compared with the alternative of
> > having a mostly useless rig if you are a contester.
> >
> > 73,
> > Dave   AB7E
>
>
>
> --
> This email has been checked for viruses by AVG.
> https://www.avg.com
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Re: [Elecraft] Legal Limit With FT8

[Ray]

Are at this AGAIN !  
WA6VAB Ray  K3 


From: Bob McGraw
Sent: Thursday, November 25, 2021 8:22 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Legal Limit With FT8

Does he blot out your K3S on all bands, or just if you if both are on 
the same band?

I have some avid DX'ers within 20 miles or less of my QTH, one runs a 4 
ele Steppr and legal limit.  He and I can be on the same band, both 
working FT-8 and neither knows the other is on the band.  Oh, I see his 
signal but certainly there is no receiver overload on my part.  As to 
him likely having a non-Elecraft radio...can't say.

But perhaps the other fellow is causing some serious splatter. If so, 
that may be justification to contact one of the ARRL Volunteer 
Monitors.  If the issue is verified, that report goes to HQ, and they 
review the case.  And it may get turned over to the FCC.  At which point 
I am sure he would become very interested in what his equipment is 
doing.  No one likes to justify their operation to the FCC.

If you are having overload issues, perhaps you need to review your 
receiver configuration, set-up, and operating practice.   Or just go to 
another band.

73

Bob, K4TAX


On 11/25/2021 8:55 PM, elecraft-requ...@mailman.qth.net wrote:
> Message: 21
> Date: Thu, 25 Nov 2021 20:56:11 -0500
> From: Bill Coleman
> To: Richard
> Cc: Elecraft
> Subject: Re: [Elecraft] Legal Limit With FT8
> Message-ID:<23e7d45d-acea-486d-ab77-d8b5ac443...@arrl.net>
> Content-Type: text/plain; charset=us-ascii
>
> How much, power, exactly, is this fellow running?
>
>> On Nov 11, 2021, at 8:16 AM, Richard  wrote:
>>
>> There's a major jerk who lives within about 20 miles of me who runs BIG 
>> power with FT8. When he's on the air, he blots out my K3S so his is the only 
>> signal on the waterfall, the only signal the decoder sees. When his BIG 
>> POWER is on the air, I can't be. And he's made it clear that he doesn't care 
>> what he does to anyone else's enjoyment. Power for power's sake is 
>> contagious.
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Re: [Elecraft] Legal Limit With FT8

[Ray]

ALL…….. 
All we need is More Regulations in the Amateurs’ World.
 
Ray WA6VAB K3 

From: Jim Brown
Sent: Wednesday, November 10, 2021 11:18 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Legal Limit With FT8

On 11/10/2021 10:36 PM, Rick Tavan wrote:
> I must be missing something.

Hi Rick,

FT8 and similar modes are weak signal modes, and for difficult paths, 
it's all about signal to noise, not signal to QRM. For several seasons, 
I've been running legal limit to fill in DXCC to eastern EU on 160M. 
During the summer, many of us run legal limit and lots of aluminum on 6M 
for weak and brief multi-hop Es openings to fill in missing grids in 
search of the Fred Fish award. We also run power for meteor scatter, and 
most who do moonbounce run legal limit.

The fundamental GOOD reason for power is RX noise on the other end of 
the QSO. I regularly give signal reports 10-15 dB better than I receive, 
simply because most hams are bathed in electronic noise from their own 
homes and those of their neighbors. Noise levels have increased 
drastically over the years. When I first moved to W6 in 2006, I could 
work EU on CW. Not a lot, but at least 3-4 QSOs per year, sometimes 
more. In the last six years, I've HEARD 6 CW signals from EU, and only 
two heard me. And my 160M antenna farm is better today than it was then.

73, Jim K9YC
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Re: [Elecraft] Problem Tuning K3: now off centre fed dipole

[Ray]

Great Article…….
WA6VAB  Ray  K3 

Sent from Mail for Windows

From: CUTTER DAVID via Elecraft
Sent: Friday, November 5, 2021 4:24 AM
To: k...@altaeng.com; elecraft@mailman.qth.net
Subject: Re: [Elecraft] Problem Tuning K3: now off centre fed dipole

Chuck

I'm not an expert but you might find it useful to read
http://www.karinya.net/g3txq/baluns/baluns.pdf

Antennas popular with Elecraft back-packers are off centre fed dipoles: eg 20ft 
of wire up a tree and 10ft of wire on the ground as an example.
Many low power and one-man dxpeditions use these antennas and win trophies!  
I used an 80m ocf dipole in an IOTA contest with team CR5CW running 100W and a 
K3 and did pretty well. 

As has been said on many occasions, there is no real difference between a 
dipole fed in the middle and one fed off centre: as long as you can get the 
current to run in the dipole by suitable matching and don't waste it along the 
way, they are indistinguishable to the dx station.  Centre fed multi-band 
antennas can waste power in the matching unit, take care. Use Elecraft internal 
matching and it's all plug and play. 

Build one or buy one and just have multi-band fun from one antenna.  

David G3UNA


> On 04 November 2021 at 20:54 Charles K0MV  wrote:
> 
> 
> Hi David,
> 
> Thanks for the synopsis below.  I found it very useful being unfamiliar 
> with amateur practice over the years with OCF antennas.  My antennas are 
> all center fed.
> 
> I replied to this message because it was the most informative. Other, 
> later messages on this thread were also interesting.  But generally, the 
> discussion lacks quantitative data and so it is difficult to objectively 
> evaluate the efficacy and drawbacks of different realizations.  It is 
> also difficult to project which realization or changes would fit a given 
> set of constraints.
> 
> The positive aspect is there has been years and years of experimentation 
> and different approaches to this multiband dipole problem.  I would like 
> to hear more on these.
> 
> Could you describe G3TXQ's 2 core Guanella balun solution more 
> completely?  I checked the Spiderbeam website and it is not clear to me.
> 
> I think this is relevant to Elecraft since many applications are 
> portable and QRP.  We want that antenna to really work and understanding 
> it better, helps.
> 
> 73,
> 
> Chuck K0MV
> 
> 
> On 11/4/21 9:59 AM, CUTTER DAVID via Elecraft wrote:
> > Hi Dan
> >
> > Good question.  I'll answer as a non-expert as best I can.
> >
> > This is essentially a quest for a multi-band dipole that is easy to make 
> > and use.  If you can put up mono band dipoles and beams for all your bands, 
> > you probably will not bother going this route.
> >
> > The popular description of the ocf dipole (going back at least to the 50's) 
> > has a feed point of one third/two thirds on the dipole.  (BTW this is 
> > otherwise a normal half wavelength dipole.
> >
> > This provides approximately 200 ohm feed point impedance for most popular 
> > HF bands, eg 80, 40, 20 and 10m, not 15m.
> >
> > Back in the 60's we could use coax into a valve PA, which I preferred to 
> > the G5RV which needed an outboard matching unit.  In transistor days we 
> > used a modest matching unit with an swr meter and were ignorant of common 
> > mode current.
> >   
> > In the 90s I used ladder line to ground level and an auto-tuning unit into 
> > a tent for field day, believing it to be more efficient.   With grounded 
> > coax I didn't have live chassis syndrome and out in the wilds there was no 
> > noise pickup.  Later I used ladder line through a balun then into the radio 
> > with an on-board matching unit and that was, for me a great step forward 
> > with auto-tuning.
> >
> >
> > It was discovered by some users that the common mode current performance 
> > using off-the-shelf baluns and chokes was inadequate and could result in 
> > live chassis syndrome and noise pickup on receive from home locations.  
> > Poor matching on 15m was still a problem as were the WARC bands.
> >
> > Now in the 21st Century, just a few years ago, Rick DJ0IP tackled the 
> > problem starting with a 40m ocf dipole using a new balun/choke combination. 
> >  He read that W8JI and others recommended a 20% feedpoint to bring 15m into 
> > the 200 ohm region. He then used a Guanella 2-core balun solution from 
> > Steve G3TXQ and others to provide the 50 ohm output with low common mode 
> > current.  It had to be the dual core version, the single core version 
> > simply didn't suppress the cmc.  This is now marketed by Spiderbeam.  
> > Moving to an 80m ve

Re: [Elecraft] Problem Tuning K3

[Ray]

Jim…… 
First….. what length is your OCFD ?
2nd……   What Height above ground ?
3rd……   What Feed line are you using ?
4th ……   What Band do you Operate on Most ?
I can Model the Antenna and give you the results .

Ray WA6VAB  K3  


From: CUTTER DAVID via Elecraft
Sent: Tuesday, November 2, 2021 11:50 AM
To: j...@audiosystemsgroup.com; elecraft@mailman.qth.net
Subject: Re: [Elecraft] Problem Tuning K3

Jim

Don't stay stuck in the past: not all ocf dipoles are created equal. 
With properly designed transformers and chokes, the common mode current can be 
tamed to perfectly decent levels.  

David G3UNA

> On 02 November 2021 at 18:25 Jim Brown  wrote:
> 
> 
> On 11/2/2021 6:15 AM, Bill via Elecraft wrote:
> > I assume your using a balun with your
> > OFC antenna. I had a similar problem with my OCF that turned out to be the 
> > balun.  It was fine under low power but would not tune under high power.
> 
> NO! The problem was that by their nature, OCF antennas are BADLY 
> unbalanced, placing very high stress on a common mode choke, so are 
> likely to fry ANY common mode choke that does anything useful.
> 
> Study k9yc.com/RFI-Ham.pdf
> 
> AND -- erase the word "balun" from your vocabulary. It is used to 
> describe almost a dozen very different things, obscuring understanding 
> of how things work.
>
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Re: [Elecraft] Problem Tuning K3-" Balun"

[Ray]

I agree…. Feedline’s Best Friend ! 
WA6VAB Ray K3 


From: Bill via Elecraft
Sent: Tuesday, November 2, 2021 6:15 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Problem Tuning K3

Jim,
I assume your using a balun with your 
OFC antenna. I had a similar problem with my OCF that turned out to be the 
balun.  It was fine under low power but would not tune under high power. 

Thanks, 
Bill - W0BBI 
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Re: [Elecraft] center fed dipole

[Ray]

Your Guessing !
Did you Model it ???
Then you will know……..
Ray WA6VAB K3



Windows 0

From: Bob McGraw
Sent: Saturday, October 30, 2021 6:17 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] center fed dipole

I don't understand the use of the 4:1 balun.  On 80M the feed Z of that 
antenna is more likely 25 to 50 ohms.  The 4:1 balun would present a 
impedance to the RG-213 of 6.5 to 12.5 ohms.  You would be much better 
with a 1:1 balun configuration.  Remember one is not matching the feed 
line impedance but is matching the antenna impedance.

The ideal use of a 4:1 balun is with a folded dipole antenna which 
presents a 200 to 300 ohm impedance.  Now the feed line Z is much closer 
matched and the 4:1 balun gets the Z to the coax in the 50 to 75 ohm 
range.  Much more efficient.  This of course is a single band antenna.

See https://www.dj0ip.de/balun-stuff/  for good, accurate, and reliable 
information on baluns and their usage.  Most hams have it wrong as well 
as most manufactures of antenna tuners who include a 4:1 balun.

73

Bob, K4TAX



On 10/30/2021 5:07 PM, elecraft-requ...@mailman.qth.net wrote:
> Message: 11
> Date: Fri, 29 Oct 2021 18:25:44 -0700 (PDT)
> From: MIKE ZANE
> To:"Elecraft@mailman.qth.net"  
> Subject: [Elecraft] center fed dipole
> Message-ID:<1705203692.528740.1635557144...@connect.xfinity.com>
> Content-Type: text/plain; charset=UTF-8
>
> I have no problem with a 130 ft dipole fed with 25 feet of 450 ohm ladder 
> (window) line to a 4:1 4K balun with 15 feet of RG-213 to my MFJ 989C tuner. 
> I have run from 5w to 1 KW with itno problems at all.  n6zw

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Re: [Elecraft] KAT500 - does it earth antenna connections

[Ray]

The Ground should be Attached to the Equipment,
Not to the Antenna lead.
Ray WA6VAB  K3 


From: David Ferrington, M0XDF
Sent: Thursday, September 30, 2021 8:20 AM
To: Ted Edwards W3TB
Cc: ElecraftList
Subject: Re: [Elecraft] KAT500 - does it earth antenna connections

Or connect a dummy load via a power meter (Bird 43) to antenna 1, so you can 
check power output against a third party meter.
73 de David, M0XDF
-- 
It came to me that reform should begin at home, and since that day I have
not had time to remake the world. -Will Durant, historian (1885-1981)

> On 30 Sep 2021, at 16:10, Ted Edwards W3TB  wrote:
> 
> Interesting idea.
> I have two antennas, so I could connect my ground to #1 and antennas to #2 
> and #3?
> Just manually choose an antenna on start-up.   Hm-m-m-m-m.
> 
> On Thu, Sep 30, 2021 at 9:54 AM David Ferrington, M0XDF 
> mailto:m0...@alphadene.co.uk>> wrote:
> Thanks Greg - guess I should learn to count!
> 73 de David, M0XDF
> 
> If people knew how hard I worked to get my mastery, it wouldn't seem so 
> wonderful after all. -Michelangelo Buonarroti, sculptor, painter, architect, 
> and poet (1475-1564) 
> 
> > On 30 Sep 2021, at 15:46, Greg Mitchell  > <mailto:kb1...@arrl.net>> wrote:
> > 
> > It has 3 antenna connections, not 4. It grounds the unused ones and selects 
> > antenna 1 on power-off. I put my dummy-load on antenna 1 so my station is 
> > disconnected from the antennas when powered down.
> > 
> > On Thu, Sep 30, 2021 at 10:40 AM David Ferrington, M0XDF 
> >  > <mailto:m0...@alphadene.co.uk><mailto:m0...@alphadene.co.uk 
> > <mailto:m0...@alphadene.co.uk>>> wrote:
> > Sorry if this is obvious, but I haven’t bought a KAT500 yet (to go with the 
> > KPA500 I managed to pick up from a fellow ham). I’m aware there are 4 
> > selectable antenna connectors. Does it ground or earth the ones not 
> > currently selected?
> > 
> > 73 de David, M0XDF (K3 #174, P3 #108)
> > 
> > For disappearing acts, it's hard to beat what happens to the eight hours 
> > supposedly left after eight of sleep and eight of work.
> > -Doug Larson 
> > 
> > __
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> > <http://mailman.qth.net/mailman/listinfo/elecraft> 
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> > <mailto:Elecraft@mailman.qth.net <mailto:Elecraft@mailman.qth.net>>
> > 
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> 
> -- 
> 73 de Ted Edwards, W3TB and GØPWW
> 
> and thinking about operating CW:
> "Do today what others won't,
> so you can do tomorrow what others can't."

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Re: [Elecraft] K3 Display Won't Shut Off

[Ray]

Yes, Alarm and Remote Operations Settings.
Ray WA6VAB  K3

Windows  0


From: Drew AF2Z
Sent: Thursday, September 16, 2021 5:13 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 Display Won't Shut Off

I've had the same effect by setting the K3's Alarm to ON then turning 
off the p/s. When the p/s is turned on again (and maybe the K3 Power 
button pressed; I forget the exact sequence now) the LCD backlight comes 
on. So, you might want to check the Alarm setting.

73,
Drew
AF2Z


On 09/16/21 18:30, Jim McCook wrote:
> When I plug the ACC connector cable for the KPA1500 into my newly 
> acquired spare K3, the POWER button doesn't shut off the backlight in 
> the display or the P3 that's connected to it.  As soon as I remove that 
> connector or shut off the PS, it powers down normally.
> 
> This doesn't happen with the other K3 using the same cable.  All is normal.
> 
> Looking in the archives I saw something about a D10 removal, but 
> couldn't find the specific info as to where it is and what the access 
> is.  It was described as an early mod, but this K3 is a later version 
> #6695.  Any specific ideas where the problem is and how to fix it?
> 
> 73, Jim W6YA
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[Elecraft] Win4K3suit and the K4

[Ray Spreadbury via Elecraft]

Does this program work with the K4?
73
Ray G3XLG

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[Elecraft] New K4 beta software available release 22

[Ray Spreadbury via Elecraft]

Thanks Bob for your advice. 
I disconnected the ACC cable from the K4D and started it again. All OK this 
time and the rig booted up normally showing Beta release 22 when clicking Fn>SW 
List.
Many thanks Bob
73
Ray G3XLG

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Re: [Elecraft] New K4 beta software available release 22

[Ray]

Ray …Are you posting your Request on the K4 Page ?  
Ray  WA6VAB K3  


From: Ray Spreadbury via Elecraft
Sent: Sunday, August 29, 2021 1:09 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] New K4 beta software available release 22

Well I downloaded this new release and installed it as instructed on the 
Elecraft Website. It reported SUCCESS after each module and then the K4D went 
into a lock up with all 4 LED’s lit. After waiting 10 mins with no change, I 
restarted the K4D with the same result – blank screen with all 4 LED’s lit.
Any ideas what to do next please?
73
Ray G3XLG

Sent from Mail for Windows

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[Elecraft] New K4 beta software available release 22

[Ray Spreadbury via Elecraft]

Well I downloaded this new release and installed it as instructed on the 
Elecraft Website. It reported SUCCESS after each module and then the K4D went 
into a lock up with all 4 LED’s lit. After waiting 10 mins with no change, I 
restarted the K4D with the same result – blank screen with all 4 LED’s lit.
Any ideas what to do next please?
73
Ray G3XLG

Sent from Mail for Windows

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[Elecraft] Connecting the K4D to an external monitor

[Ray Spreadbury via Elecraft]

Thank you guys for the responses both here and direct. I have checked my two 
monitors and both unfortunately only have the one HDMI input. So, I have now 
ordered an HDMI switch as suggested by several. Many thanks for the help.
73 Ray G3XLG

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[Elecraft] Connecting the K4D to an external monitor

[Ray Spreadbury via Elecraft]

I guess I did not explain clearly what I want. 
My PC (not a laptop) currently feeds two large screens in my shack. In a 
contest, I use one for my logging program (eg N1MM) and the other for a 
panoramic display from an SDR.
What I want is for that second screen to show the K4D display via my PC
73
Ray G3XLG


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[Elecraft] Connecting the K4D to an external monitor

[Ray Spreadbury via Elecraft]

I understand that the K4D can be connected to an external monitor using the 
Video output on the rear panel, but can it also be displayed from the PC? 
My PC and the K4D are both connected to the router (and the internet) via the 
K4D Ethernet port using a LAN cable, so can I display the K4D screen from the 
PC? 
If so, what steps do I need to take please?
73 Ray G3XLG

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Re: [Elecraft] OFFLIST: Re: K4 delivery status

[Ray]

Software is NEVER complete……. Ask Microsoft !

WA6VAB Ray K3


From: Barry Baines via Elecraft
Sent: Monday, August 16, 2021 10:24 PM
To: David Gilbert
Cc: elecraft@mailman.qth.net
Subject: [Elecraft] OFFLIST: Re: K4 delivery status

Hi Dave:

> On Aug 17, 2021, at 12:04 AM, David Gilbert  wrote:
> 
> 
> I'm not missing any point other than your continued deflection with that Flex 
> wall of text, and I certainly know that software development takes time and 
> people.  My only point has been that Elecraft is shipping K4's without the 
> software that they at least implied already existed (they demo'd it!) and 
> that obviously other other (probably more important) efforts are taking 
> precedence over its completion.  Why do you keep acting like I have said 
> anything else??

Elecraft may have demoed an ‘alpha’ version of remote software but that doesn’t 
necessarily mean that it is ready for prime time.  I have no idea where they 
stand on their development work or where it stands in their priority list.  I 
suspect that they’re dealing with more critical priorities, like it or not.

I referenced the “Flex experience” because it seems to me that it a reflection 
of how product development has changed in the amateur radio industry.  No 
longer do manufacturers come out with a HF rig every few years with the latest 
features (that can’t be upgraded later).  Instead, they’re developing a new 
‘ecosystem’ that presumably will last for a number of years where new features 
are introduced as ’software updates’ rather than as hardware enhancements in 
the guise of a new model.  This approach suggests that the product will 
‘mature’ over time and that it may take a number of years to reach what was 
initially ‘promised’ under the vision that was announced when the product 
introduction was made.  It may also be the case that capabilities not announced 
upon product announcement may be introduced such as ‘MultiFlex” where two 
operators are sharing the same transceiver at the same time (but only one is 
transmitting at a given instant).  

SDR development in particular is not trivial requiring specialized skills and 
where resources may be constrained that will lengthen development time.  
Furthermore, under the adage of “the perfect is the enemy of the good’, 
hardware will be released with software embedded that may not provide even 
‘basic’ features that clearly should be included.  Flex did this with SmartSDR 
v1.xx.  They sold the transceiver as being ‘remotable’ but it took them five 
years to provide that capability.  The delay was likely due to higher 
priorities (to provide the features that everyone, not just remote operators, 
needed) and more complex challenges (such as providing appropriate security to 
prevent unauthorized use of an amateur transceiver that can only transmit under 
the control of an authorized licensee).  Demoing remote operation is not the 
same as a general release where security features must be built-in to ensure 
station security.

I suspect that the development efforts under Flex are a reflection of the 
challenges now faced by Elecraft recognizing that there are significant 
differences in equipment architecture but both push the SDR envelope to provide 
the richest experience as perceived by each manufacturer.  I’m not predicting 
that it will take Elecraft five years to provide a remote operation option. I 
am suggesting that it may be ‘awhile’ as it isn’t clear what they expect to 
provide.  It may be app(s) that runs on Windows or Mac or  iOS or Android or it 
may also include a hardware equivalent (K4/i0) or they will provide an API that 
developers can use to access the K4 feature set.   I’m not following the K4 
’story’ close enough to know exactly what their current thinking is on this 
matter.  I do intend to attend the Huntsville Hamfest this coming weekend, so 
perhaps I’ll have a better understanding of their current situation after 
visiting the Elecraft booth.

Lastly, the benefit of being an ‘early adopter’ is that the user benefits from 
the development efforts to date. Clearly, the K4 is a significant upgrade over 
the K3 as currently demonstrated  The downside is potential frustration as 
desired features are not available immediately upon initial product shipment 
and it could be ’sometime’ before the full potential of a product is reached.  
I considered my Flex-6700 to be a ‘paperweight’ for five years because it was 
not remote-able while others who were using their Flex transceivers locally 
were very satisfied with what was being provided at the time.  I purchased the 
K3 system in the interim to give me some level of remote capability.  Now that 
the Flex system has matured to the point where I can fully utilize it as a 
remote station, the K3 is now serving as a ‘backup’ system  which is very 
important given that I’m usually over 1200 miles from the ham site for months 
at a time.  I have a Flex

Re: [Elecraft] wall outlet for KPA1500

[Ray]

All…… When in Dough, Look it UP ! 
Too Easy………  WA6VAB Ray K3



From: David F. Reed
Sent: Friday, August 6, 2021 5:30 AM
To: James F. Boehner, MD
Cc: Elecraft List
Subject: Re: [Elecraft] wall outlet for KPA1500

The electrician was confused; there is a similar 120V only plug, the difference 
being the horizontal and vertical blades are on opposite sides of the plug!

When I showed him the NEMA drawings, he quickly got sorted out and went with 
the flow (apologetically).

73 de W5SV - David F. Reed

> On Aug 6, 2021, at 00:28, James F. Boehner, MD  wrote:
> 
> Dave,
> 
> I hate to prolong this, but what was the solution?  Was the electrician 
> mistaken, was the supplied plug incorrect or was it something else?
> 
> Everyone likes to hear the solution to a mystery! 
> 
> '73 de JIM N2ZZ
> 
> 
> -Original Message-
> From: elecraft-boun...@mailman.qth.net  On 
> Behalf Of David F. Reed
> Sent: Thursday, August 5, 2021 10:53 PM
> To: Robert Rennard 
> Cc: Elecraft List 
> Subject: Re: [Elecraft] wall outlet for KPA1500
> 
> You are correct, as have been all the others who gave the same information; 
> it is solved now thanks to all!
> 
> Maybe we should close the topic…
> 
> 73 de Dave, W5SV 
> 
> Sent from my iPhone
> 
>> On Aug 5, 2021, at 16:29, Robert Rennard  wrote:
>> 
>> 
>> Dave –
>> I think what you want is a NEMA 6-20R wall outlet.  See page 8 of the 
>> KPA1500 manual.
>> Bob R
>> 
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Re: [Elecraft] In Line Power Pole Fuses

[Ray]

30 Amp   --- A little too High for me !
I would use 25 Amp. 
WA6VAB  Ray  K3


From: Dave
Sent: Wednesday, July 21, 2021 7:43 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] In Line Power Pole Fuses

Hi,

I am unsure what you are asking...  If you are asking about fuse values, 
I select values a bit above the max peak current I expect.  For my K3 I 
use a 30 amp fuse.

If you are asking about voltage drop, and want to know what the K3 sees, 
there is a built in volt meter in the K3, (see the manual), which will 
show you the voltage at the K3, after all your fusing, and wiring.

I always take my voltage readings at full output.  I try and stay within 
the limits Elecraft sets for voltage.  If I am running low voltage on 
transmit, I goose the power supply slightly, staying below the max 
voltage rating Elecraft recommends when not transmitting at full power.

The fuse(s) is/are probably not going to protect my radio-- if something 
happens, (i.e., current draw in excess of 30 amps), the radio is 
probably already broken.

I use the fuse to reduce runaway thermal effects, (read that as fire), 
on my power supply wiring in the event of a short to ground.  I place 
the fuse(s) as close to the power supply as my wiring will allow.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 7/21/21 7:18 PM, Peder Kittelson wrote:
> I have fused my Elecraft radio equipment with inline power pole positive
> and negative ATC car standard blade fuses.
> I am now doing an audit of the fuses in my system to make sure they are
> appropriate for the equipment they protect.  I realize there are internal
> fuses in many cases, I prefer doubling my protection with inline external
> fuses as well.
> 
> I have not read or heard anyone discuss the appropriate amperage ratings of
> fuses for my equipment or equipment in general.  I would appreciate your
> recommendations on fuse sizes for these, as well as general approaches.
> 
> Equipment and Specifications from Elecraft Manuals:
> 
> 1.  Elecraft K3s with 100 watt amp: Specs are 17-22 amps typical on
> transmit, recommended 25 amp power supply.
> 
> 2.  Elecraft KPA 500: Specs are PA Current 20 amp maximum.
> 
> 3.  Elecraft KX3: Specs are 1-2 amp typical current in transmit.
> 
> One other important question.  I have conquered much of the RFI in my radio
> room using power poles with extended thick Red and Black wiring wound
> around toroids.  In this case the leads go from the Astron RS-35A to the
> K3s.  I want to make sure there isn't too much drop in voltage over the
> extended toroid wiring.  How can I best gauge what the K3s receives in this
> setup? The manual says it should receive 13.8 volts nominal, 11 volts
> minimum and 15 volts maximum. I think I am beyond the provided and
> recommended 5' power cable.  I have not had any problems (that I know of).
> 
> I do not have a desk full of electronic devices for evaluating this, so is
> there a simple way to be reasonably sure?
> 
> 73 and thanks for your help,
> 
> W7RPK, Peder
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Re: [Elecraft] Question about antenna matching

[Ray]

The Statement  "This tuner will tune an 8:1 mismatch."
Is made in an Armature world, buy an Amateur person,
Not for a Professional Product by  Calibrated Test Equipment.
This is Not New, it has happened for Decades.  Buyer Beware.
WA6VAB  Ray  K3   


From: Al Lorona
Sent: Tuesday, July 13, 2021 9:32 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Question about antenna matching

Thanks to Al N1AL, Jack W6FB, and Dave AB7E for great information that helped 
me a lot.

I'm in the circuit simulation business, after all, and I confess that I was 
just being lazy, so I ran some simulations that confirmed what Dave, in 
particular, had said.

As suggested by Dave, I chose typical Q values of 100 for the inductor and 1000 
for the capacitor. Then I simulated as many points as I could on the entire 
Smith Chart to see 1/ if the tuner could tune each point to 50 ohms, and 2/ 
what the power loss was in the tuner at each of those points. Then, I 
discovered that K6JCA had already done this on his excellent blog at:  
https://k6jca.blogspot.com/2015/03/notes-on-antenna-tuners-l-network-and.html . 
The guy is totally professional and exhaustive in his discussions. I really 
admire his work.

Anyway, it turns out you can make a graph of power lost in the tuner versus 
phase angle of the load. As you might suspect, 'easy' loads of 5 or 500 ohms 
resistive (SWR = 10:1) don't tax a tuner as much as reactive loads do. In fact, 
they're near (but interestingly, not at) the areas of *minimum* power loss.

Whenever an antenna tuner is reviewed in QST, resistive mismatched loads are 
usually used. I'd like to see tuners tested with reactive loads, but the number 
of loads required to do this from 160 to 10 meters would be enormous. I see why 
resistive loads are preferred, because you can re-use the loads on every band.

I'm frustrated by imprecise statements like, "This tuner will tune an 8:1 
mismatch." What does that mean? There has to be a better way for manufacturers 
to spec the exact impedance ranges that their tuners will tune. I like the 
method that I used, which shades a Smith Chart in color based on the two 
criteria I listed above. One picture would tell you all about a tuner's 
effectiveness. No real tuner can tune the entire Smith Chart, but the more of 
the chart that is covered, the better the tuner. And if you can shade the areas 
of higher tuner loss in red, then that would also tell you an important piece 
of information. (However, to generate such a plot through measurement you'd 
probably need a very expensive load-pull setup, which is a totally separate 
discussion.)

For the L-network I simulated, a particularly difficult 10:1 load was near the 
7 -  j30 ohm point, which is toward the bottom edge of the Smith Chart at a 
phase angle of 282 degrees (or -77 degrees), and a similar point near the top 
edge. The lower impedances with capacitive reactance were definitely the most 
difficult (using power loss as the measure of 'difficulty') for the tuner to 
handle, which Dave stated in his post, while the high impedances with inductive 
reactance were generally more difficult. If your antenna must be mismatched, 
and you're using an L-network tuner, you want it to be > 50 ohms with a little 
bit of capacitive reactance, or below 50 and inductive.

By the way, K6JCA actually put the Elecraft KAT500 through this simulated 
evaluation and it tested so well that he ended up buying one.


Al  W6LX/4


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Re: [Elecraft] K2 / ESD / Diodes D16 7 D17 replaced

[Ray]

Put them right across the 50 Ohm input.
Break-down was 95 volts. 

If you need Receive protection,
Maybe back to back 1n5711’s 
Conduction at ~0.25 volts………. WA6VAB


From: Don Wilhelm
Sent: Tuesday, June 29, 2021 11:38 AM
To: Ray; Frank Krozel
Cc: Elecraft Reflector
Subject: Re: [Elecraft] K2 / ESD / Diodes D16 7 D17 replaced

Those NE-2s have a high breakdown level.  OK for vacuum tube equipment, 
but too high for semi-conductors.

73,
Don W3FPR

On 6/29/2021 2:16 PM, Ray wrote:
>
> In the Early days we used a NE-2 for  front end Protection…..
>
> Ray WA6VAB  K3
>
> *From: *Frank Krozel <mailto:kg9hfr...@gmail.com>
> *Sent: *Tuesday, June 29, 2021 9:33 AM
> *To: *d...@w3fpr.com <mailto:d...@w3fpr.com>
> *Cc: *Elecraft Reflector <mailto:Elecraft@mailman.qth.net>
> *Subject: *Re: [Elecraft] K2 / ESD / Diodes D16 7 D17 replaced
>
> Don as usual “Thank you”
>
>


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Re: [Elecraft] K2 / ESD / Diodes D16 7 D17 replaced

[Ray]

In the Early days we used a NE-2 for  front end Protection…..
Ray WA6VAB  K3


From: Frank Krozel
Sent: Tuesday, June 29, 2021 9:33 AM
To: d...@w3fpr.com
Cc: Elecraft Reflector
Subject: Re: [Elecraft] K2 / ESD / Diodes D16 7 D17 replaced

Don as usual “Thank you”




Sincerely,  Frank Krozel t: 1-630-924-1600 fr...@electronicinstrument.com
BSEE,   AASEET,   FCC Lic.# PG-18-19178,   KG9H
Electronic Instrument Associates - Central, Inc. ...since 1971
w: www.electronicinstrument.com  d/l our linecard at 
http://www.electronicinstrument.com/lc.pdf  


> On Jun 29, 2021, at 11:25 AM, Don Wilhelm  wrote:
> 
> Frank,
> 
> Yes, you still need to disconnect.  The polyphasers protect against large 
> spikes, but smaller ones get through.
> 
> 73,
> Don W3FPR
> 
>> On 6/29/2021 11:10 AM, Frank Krozel wrote:
>> Folks after Field day with another manufacturer’s radio, I have a new to me 
>> K2/100 coming in two days to use as my “small” contest radio.
>> Short story, after using another QRP radio for an hour, I placed a K2/10 in 
>> its slot.  Contacts flowed for the next three hours and my headache went 
>> away!
>> Love the K2. (had them since 2000.)
>> 
>> New story, the K2/100 has had it’s D16 & D17 replaced (thank you Don) so 
>> that is not going to be a problem moving forward.
>> 
>> I have two Polyphasers in line and wonder if I have to disconnect from the 
>> coax line anymore.
>> Also, curious, I worked on a K3 in the past and it had a BIG protector in 
>> it, cannot recall where but it was attached across the coax input if I 
>> recall.
>> 
>> Is there any need to disconnect anymore with the two Polyphasers in line?  
>> Should I think of adding the BIG protector i saw in a K3 a few years back?
>> 
>> Yes I know we “should” disconnect but sometimes we all forget.
>> 
>> 
> 
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Re: [Elecraft] Old DOS computers

[Ray]

It has a Serious Problem !  
Do not pass Go , go directly to Costco and buy a New One.
They have concierge services and support is Good and last for Years,
 if not the life of the product.

Ray WA6VAB  

From: Jim Brown
Sent: Monday, June 28, 2021 7:32 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Old DOS computers

On 6/28/2021 6:24 PM, Bob Liesen wrote:
> My Windows 10 laptop takes a full 18 minutes
> to boot up from a cold start.  I've researched this "feature" and had it in
> to 2 repair places and have been told that the only fix is a SSD for $$$.

That suggests something seriously wrong with the computer, possibly the 
hard drive. Or perhaps it is seriously under-powered. I own six laptops, 
three with Win10-64, two with Win 7-64, and one with XP. None of them 
take more than a minute to boot. Perhaps there are problems with the 
hard drive, or there's not enough memory. The XP box is about 16 years 
old, one of Win 10 boxes is 12 years old, the Win 10 in my shack is 5 
years old, and the Win 10 box in the the house is 3 years old. Some of 
these computers are left over from when I was running my own small biz.

Also, my computers last as long as they do because I don't try to buy 
the cheapest, least powerful stuff, but something with a modern 
processor, decent hard drive, and plenty of RAM. All of them are Lenovo 
Thinkpads, some bought new, but most bought used. 8 GB of RAM is an 
absolute minimum for Win 10, and 16GB is much better. Very nice 
well-equipped used (off lease) Thinkpads can be bought in the $350 - 
$400 range.

When I've had problems like yours, I've gone to one of the guys in our 
ham club who specializes in setting computers and solving problems for 
people who pay him for his services. I can afford to pay him, and I do. 
I suspect he would do it as a favor, but he needs the money more than I do.

73, Jim K9YC


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Re: [Elecraft] Old DOS computers

[Ray]

Dick.
Many Programs were written in Basic and Still Work.
Also my VNA still runs under Win 7( not Win 10 )
So….. Life in the Technology Fast Lane. 
Ray WA6VAB K3
Sent from Mail for Windows 10

From: Dick
Sent: Monday, June 28, 2021 6:09 PM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] Old DOS computers


I will never understand how those in the Amateur radio hobby can spend 
thousands of dollars on equipment, yet they keep old PC’s that are not very 
efficient at all, nor are they secure. It just defies logic !

Dick / W1REJ
Sent from Mail for Windows 10

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Re: [Elecraft] K4 observation

[Ray]

Did You Trying Transmitting in CW mode with the Mic disconnected ?
WA6VAB  ray 


From: Wayne Burdick
Sent: Saturday, June 19, 2021 11:41 AM
To: Tom Doligalski
Cc: Elecraft Reflector; John Harper
Subject: Re: [Elecraft] K4 observation


> On Jun 19, 2021, at 3:17 AM, Tom Doligalski  wrote:
> 
> Actually, it could be a radio station. I haven’t listened long enough to 
> ascertain…
> 
> Frankly, I don’t care! The bigger problem is the rfi when I transmit. 

Which *will* be fixed.

Wayne

> 
> Tom W4KX
> 
> Sent from my iPad 
> 
>> On Jun 18, 2021, at 11:10 PM, w2xj  wrote:
>> 
>> 
>> Wayne
>> 
>> I seriously doubt this is an RF issue. TV is all digital and has no discrete 
>> audio carrier. TV RF interference would sound like white noise. This sounds 
>> more like an audio ground loop of some sort.  
>> 
>> 
>> 
>> 
>>> On June 18, 2021 10:33 PM Wayne Burdick  wrote:
>>> 
>>> 
>>> John,
>>> 
>>> If the K4 is *off*, then there's no active circuitry involved. However, the 
>>> headphone plug-insertion detect circuit may involve an IC downstream that 
>>> could include a schottky diode junction -- a potential way a very strong 
>>> signal could be rectified right at the radio end of the cable. We're 
>>> looking at that. 
>>> 
>>> If the cable is not very well shielded, and the TV station is *very 
>>> strong*, I can imagine modern physics just barely covering this situation. 
>>> It would help if the headphone cable was about the length of an end-fed 
>>> dipole at the station's frequency.
>>> 
>>> As for the K4 chassis itself: It's very well sealed (far better than the 
>>> K3/K3S).
>>> 
>>> Wayne
>>> N6KR
>>> 
>>> 
>>> 
>>>>> On Jun 18, 2021, at 3:36 PM, John Harper  wrote:
>>>> 
>>>> https://www.youtube.com/watch?v=u1XRaNpgQDI
>>>> 
>>>> John AE5X
>>>> https://ae5x.blogspot.com
>>>> 
>>>>> Noticed that when the antenna are disconnected, and the K4 turned off, I 
>>>>> hear a local TV station in the headphones… Never happened on the K3.
>>>> __
>>> 
>>> 
>>> __
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[Elecraft] P3 frequency Display

[Ray Spreadbury via Elecraft]

Thanks for the various ideas but still no solution to my problem. 
I can only think either my Elecraft cable P3/RS232 is partially faulty – (my PC 
is however picking up the frequency info for the logging program from the PC 
RS232 socket on the P3) or there is a firmware problem in the P3 which I will 
try and update.
73
Ray G3XLG

Sent from Mail for Windows 10

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[Elecraft] P3 Frequency Display

[Ray Spreadbury via Elecraft]

The K3S is connected using the Elecraft RS232P3 cable and in the P3, the radio 
selected is the K3 and the RS232 speed is 38400 baud. 
I believe the cable is working OK as I am connecting from the P3 RS232 port to 
my PC at 38400 for CAT control in my logger.
Any other ideas please?
73 Ray G3XLG

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Re: [Elecraft] A Clarification: IC-7300 vs FTDX10

[Ray]

To: HB9CVQ……. Sir.
 Thanks for the Real Information on these Radio’s, will apply. 
WA6VAB  Ray K3 
 


From: hb9...@hispeed.ch
Sent: Wednesday, June 9, 2021 4:52 AM
To: 'Morgan Bailey'; 'Ray'
Cc: 'Elecraft'
Subject: AW: [Elecraft] A Clarification: IC-7300 vs FTDX10

Yes, I agree, I also prefer the FTDX101MP  (own it 1 + year/CW, SSB) and have 3 
K3S/P3 Systems…..but...no such thing as perfect…here is my story from my 
qrz.com blog
I now use and recommend ( e.g. DSP even Better) the YAESU May 2021 SW/FW update 
now. 

I own a YAESU FTDX101MP ( SW/FW upgrade April 2020 ) since 1 Year and am very 
impressed by the high performance (I do SSB , also QRO CW; ragchewing/ DXing/ 
Contesting). This unit YAESU is partly even better than Tx / RX K3S, but not 
for QSK (relays chattering) .
I would like to bring the following, unexpected findings -should get fixed 
a.s.a.p.- to your attention (or did I overlook something?):
1. Voice Messages (e.g. CQ)  can be recorded e.g. in SSB and CW. Bacon Mode 
(automatic , interval repeat) is only possible in CW not in SSB , very 
impractical.
2. Incoming signals like QSOs cannot be recorded by the TRX directly.
3. The TX PWR Meter should read PEP not average.
4. 60m (5MHz) there is no sharp preselector available (VC Tune).  It is also 
not possible to activate VC Tune on 12m, 6m.
5. RX: IPO to AMP1 to AMP2 is about a 10dB difference each step (20dB range) , 
Input RX Attenuator is correct with -6, -12, -18 dB
6. S-Meter Calibration 160m to 6m is not always real as (IARU Definition) 
S9=-73dBm or 50uV/50Ohm. Yes, below S9 there are -3dB steps per S-Unit, above 
S9 meter indication is correct as shown
7. The band scope needs different sensitivity settings for viewing RX and own 
TX signals. If optimized for RX, you will see a completly distorted/ 
overloading signal in TX mode !
 
• 160m to 40m:  real S9 (AMP1) is more like S 7.5 on the meter, with IPO more 
like S 4.5 e.g. on 40m
• 20 to 6m: real S9 is about S9 (AMP1) on the meter
• Knowing about this I can live with it, easily. On the low bands the S-Meter 
is not very generous.
A much more critical issue for some RX denoising applications is …
Tricky Antenna port selection , accessibility to Input RX1 and RX2 individually 
not possible (diversity or local QRM reduction by phasing?)
• There are 3 Ant. Ports.
• There is a RX1 out and RX2 out port, obviously only , individually selectable 
via menu
• Normal Configuration: T1 is TX and RX Port-> measuring the RX signal 
attenuation between T1 (AMP1 , ATT 0dB, VC Tune on) and e.g. RX1 out:
It varies, from 160 to 30m…15m  from -6db/-9dB,  on 12m it is suddenly +5dB, on 
10m there is 0dB. On the low bands there is a considerable signal loss!
• Special RX Ant. Configuration: port One (#3) can be configured e.g. as RX on 
3 only , while T1 is only transmit
• Configuration R3 (RX only: AMP1 , ATT 0dB, VC Tune on), T1 TX only. Measuring 
the RX signal attenuation now between RX only import and e.g. RX1 out: -10 dB 
on 160m, 80m -3dB, 60/40/30/20m -5dB, 17m -7dB, 12m +6dB, 10m +2dB.
The mostly relatively sharp frequency band selection (VC Tune) is clearly 
visible.
• Problem/Dilemma with using an external RX phasing/ QRM Eliminator, there is 
now a missing function of routing the Main (TX) /RX Ant 1 Signal safely through 
to an RX outport (as in K3S). In FTDX101MP it is either RX all on Ant 1 or all 
RX on R3.
• The phasing unit NCC1 with me has 2 channels: A noisy main Antenna, B noise 
local noise pick-up by a 1m diameter magnetic broadband loop. The S/N improved, 
vector combined output port signal must go to the Transceiver RX input port ( 
e.g. R3).
• Therefore the safe routing through of the main antenna (only Rx function ) is 
badly missed here.
• Envisioned external solution: Order/Installation of a separate, “Modular 
Receive Antenna Interface for Transceivers DXE-RTR-2” in front of the FTDX1001MP

I also own a Elecraft K3S and did some EMI (Electromag. Interference) coupling 
experiment into the power supply (PS) port. This is another, aside from antenna 
port, important EMI port and potentially causing uncontrolled RX coupling. The 
effect is often overlooked. Conducted EMI -on the PS- of TRX ( Transceiver) 
results in backdoor coupling , if e.g. using external 12V (13.8V DC) external 
PS in a station.
Investigation: Elecraft K3S ( minus on chassis ground and grounded by terminal 
(stud) to station ground => risk of loop formation with PE protective earth):
Lab-Testing in a well-controlled coupling experiment (TRX Antenna terminated 
with DL 50 Ohm , 12V Battery operated-20 dB choked off, EMI injected 
capacitively into TRX plus, minus on GND )  
• one can show S3 on the S-Meter on 80m for already some 20mVpp CM voltage ( 
12V DC plus/minus input of TRX).
• In the same test on 20m it takes just 30mVpp to reach S8
We have seen over 100mVpp induced on the 13.8V DC supply voltage in a K3S 
experiment 28MHz, 60W into Dummy Load 50Ohm.
Using a M

[Elecraft] P3 Frequency Display

[Ray Spreadbury via Elecraft]

My new to me P3 is not displaying the frequency but rather at the top has a 0 
in the middle and +5, and -5 at either end if the spread is set to 10 for 
example. How do I get the frequency displayed please?
73 Ray G3XLG


Sent from Mail for Windows 10

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Re: [Elecraft] A Clarification: IC-7300 vs FTDX10

[Ray]

Like the Old Saying……
If you cant Hear them You cant Work them……….
That is WHY that is a $1000.00 Radio.
Good Luck Hunting the DX……

Ray WA6VAB K3


From: Don Wilhelm
Sent: Tuesday, June 8, 2021 4:35 PM
To: Richard; Elecraft
Subject: Re: [Elecraft] A Clarification: IC-7300 vs FTDX10

Richard and all,

I have a friend who bought a K3s and then afterward bought an IC-7300.  
He is a weak signal CW type of guy and reports that there are many weak 
signals that he could copy on the K3, but were non-existent on the IC-7300.

His reason for buying the IC-7300 had to do with possible "portable" 
operation.  Of course, the K3 is his rig of choice.
Yes, he does have the P3 to compliment it.

He had operated my K3 with P3 for 2 years at Field Day and found it 
excellent.  He commented that the K3 with the P3 allowed him to work 
stations "like shooting a fish in a barrel".

I know this does not compare the IC-7300 to the FTDX10, but I thought it 
to be a point of interest to some.

I wonder how many will be comparing the K4 to the K3 with on the air 
experiences.

73,
Don W3FPR


On 6/8/2021 7:00 PM, Richard wrote:
> Assuming you're a casual rawchewer and DXer, if you had an IC-7300 and an 
> FTDX10 side by side, where would they be pretty much equal, and where would 
> each outshine the other?
>
> Think in terms of using them with a KPA500 and a KAT500.
>
>

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Re: [Elecraft] 2 meter PA

[Ray]

Mirage and KLM have VHF Amplifiers for SSB.
You can find Used ones at Swaps or QTH.com 
73  WA6VAB   Ray

From: Eric Garner
Sent: Tuesday, June 1, 2021 9:22 AM
To: David Herring
Cc: Elecraft
Subject: Re: [Elecraft] 2 meter PA

RM Italy makes amps that would fit the bill. DX Engineering carries them

Eric KI7LTT

On Tue, Jun 1, 2021 at 8:33 AM David Herring  wrote:

> Can anyone recommend a good 2 meter PA for use with a KX3?
>
> I’m not looking to spend a king’s ransom, but I am leery of blindly buying
> an “unknown off-shore branded” unit.
>
> Being paired with a KX3 it would need to be portable (or at least
> luggable) and powered by 12 VDC.  30, 40, 50 watts or so would I think be
> quite fine…just more than the 2 - 3 watts the KX3’s internal 2 meter module
> puts out.
>
> Ideas, suggestions, recommendations welcomed...
>
> 73,
> David - N5DCH
>
>
>
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-- 
--Eric
_
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Re: [Elecraft] Funny K4 Story i.e. SWR

[Ray]

I Though it was 52 Ohms ?  

WA6VAB   Ray K3 #3824 

From: Bob McGraw
Sent: Wednesday, May 19, 2021 1:43 PM
To: elecraft@mailman.qth.net; t...@w7sua.org
Subject: [Elecraft] Funny K4 Story i.e. SWR

Most all SWR meters relative instruments.  Meaning they provide an 
indication in terms of ratio of one value of voltage to another value of 
voltage.  Thus better described as VSWR indication.

As to measurement of power, most all are calibrated to operate in a 50 
ohm circuit.  Departure from 50 ohms, where one uses the power 
indication post tuner, will yield an error which is sometimes 
significant, in the power indication.

73

Bob, K4TAX

Message: 10
Date: Tue, 18 May 2021 08:44:01 -0700
From: Tom Azlin W7SUA
To:elecraft@mailman.qth.net
Subject: Re: [Elecraft] Funny K4 Story
Message-ID:
Content-Type: text/plain; charset=utf-8; format=flowed

I have an external meter on each of my antenna feedlines so I know the
actual SWR for each antenna. Also see a difference in the reported power
out on my (still) K3 versus the power reported on the external SWR/PWR
meter.

Tom w7sua


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Re: [Elecraft] Funny K4 Story

[Ray]

My K3 has a SWR display next to the RF Power meter in the Display.
So it Sounds like the K4 Does Not have that type of Display ?

WA6VAB  K3


From: Roger Stein
Sent: Sunday, May 16, 2021 7:11 AM
To: Tom Doligalski
Cc: Elecraft List
Subject: Re: [Elecraft] Funny K4 Story

Great story and wisdom moment Tom!

73, Roger VA1RST 

Sent from my iPhone

> On May 16, 2021, at 11:04 AM, Tom Doligalski via Elecraft 
>  wrote:
> 
> Last week Monday I received K4 SN0110. The Brown Truck came at about 2 PM.
> 
> That morning I had checked into an 80M net using my trusty K3. For 8)M is use 
> an inverted V. All was well.
> 
> Monday afternoon was a frenzy of setting up and using the new K4. Pretty easy 
> setup.
> 
> All week long I used the K4. All was good, but I was disappointed at signal 
> strengths on 80M. I kept thinking that the K4 just couldn’t receive well on 
> 80M!
> 
> Yesterday I was out in the back doing yard work. That’s when I noticed that 
> the support ropes on BOTH ends of the 80M inverted V had failed, and the the 
> antenna was lying on the ground!
> 
> We had had a storm come through here Monday mid-day, and my supposition is 
> that the support ropes had failed. I restored the support ropes, and low and 
> below the K4 works well on 80M again!
> 
> I normally would have noticed the change in SWR, and realized that I had an 
> antenna problem. But, of course, I had tuned the K4 for the first time on 80M 
> when I received it!
> 
> A learning moment (operator error?). Gonna try to check the antennas out a 
> bit more frequently!
> 
> 73, Tom W4KX
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Re: [Elecraft] [K3][K2][K1] Legacy Update, Tuneup, Rescue, Build Services

[Ray]

Is this an Advertisement ?  


From: Alan D. Wilcox
Sent: Tuesday, April 27, 2021 10:23 AM
To: Elecraft Reflector
Subject: [Elecraft] [K3][K2][K1] Legacy Update, Tuneup, Rescue, Build Services

   "W3DVX Rescues Legacy Elecrafts"

Hello,

Now doing K3 updating mods to legacy K3's. See list of updates you might 
want at
https://elecraft.com/pages/mods-notes-alerts  (Click on "Retired Products")

Does your K1 or K2 need repair? Tuneup?
Want to sell, but it needs some attention before offering it for sale?
In addition to tuning your rig, I can also rescue a building project you 
might have started some time ago.

See what my clients have said about my construction and service work at 
http://www.eham.net/reviews/detail/6768
Photos of the popular "Twins" -- the KPA100 and KAT100 in EC2 enclosure 
-- are at
https://wilcoxengineering.com/kpa100-in-ec2/

Cheers,
Alan

Alan D. Wilcox, W3DVX (K2-5373, K3-40)
570-916-9590 (cell, text)
http://amazon.com/author/alandwilcox
Williamsport, PA 17701

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Re: [Elecraft] Elecraft Digest, Vol 204, Issue 6

[Ray]

Ace Hardware has some screws in Black.
WA6VAB   Ray K3 #3824 



From: Don Wilhelm
Sent: Tuesday, April 13, 2021 2:49 PM
To: Tommy Judson; elecraft@mailman.qth.net
Subject: Re: [Elecraft] Elecraft Digest, Vol 204, Issue 6

Tommy,

I highly recommend that you get the proper screws from Elecraft to be 
certain they are the correct length.
Hardware store screw are normally not available in black, so why mess up 
the appearance of your KX2 with zinc plated screws.

73,
Don W3FPR

On 4/13/2021 11:36 AM, Tommy Judson via Elecraft wrote:
> Make a bad purchase good?
> Bought a KX-2 off the internet and have found that it is missing several of 
> the screws that held the end plates on.  Asked about that and the seller said 
> he tried to put some sort of protective end plates onto the radio but 
> couldn’t do it so threw them away and put the original end plates back on.  
> What concerns me about just going to the hardware store and getting more 
> screws (that might not be the proper thread/length) is I think two of the 
> screws held the final output transistors onto that end plate which I assume 
> was for that end plate to act as a heatsink.
>

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Re: [Elecraft] Where are the K4 reviews?

[Ray]

Maybe Eric should just say……..
Life with the corona virus has delayed everything by One Year,
So it is with the Delivery of the K4 !  
I am sure You would not Accept or be Happy Either !
Ray WA6VAB K3 



From: David Gilbert
Sent: Tuesday, March 30, 2021 2:38 PM
To: Hal Massey
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Where are the K4 reviews?



If you believe all of that to be true, clearly you haven't been 
following the posts here on the reflector.

Besides, I don't find "if you can't accept being in the dark ask for 
your money back" to be sound business practice.  It certainly wouldn't 
have been tolerated in the large business I ran for several years.

Dave   AB7E



On 3/30/2021 1:18 PM, Hal Massey wrote:
> David,
>
> Is the customer set you are referring to and claiming to be 
> sympathetic too even in existence? Elecraft will refund money to 
> anyone that asks. Wouldn’t those that can’t have their money tied up 
> have pulled out by now? Wouldn’t those that are upset with the 
> communications be gone by now??
>
> Regards
> -Hal
>
>> On Mar 30, 2021, at 10:51 AM, David Gilbert > <mailto:ab7e...@gmail.com>> wrote:
>>
>>
>> As the kids say, "cool story, bro."
>>
>> None of it changes the fact that lots of people have put out a lot of 
>> money with almost zero visibility into when they will get their 
>> product, and the K4 situation doesn't have the significantly 
>> leveraged upside that your story did.  There isn't the same 
>> risk/reward ratio here that your example had. Apples and potatoes.
>>
>> There are lots of reasons why Elecraft could be granted some slack 
>> for major and repeated delays in shipping the K4, but the part I 
>> don't understand is the almost total absence of regular communication 
>> on the delivery status.  It makes no sense at all.  If Wayne can find 
>> the time to tell us about his latest pedestrian mobile contact he 
>> should be able to tell his investors where the company stands on 
>> actually producing the product that they paid for.
>>
>> I'm just an interested observer here since I haven't ordered a K4, 
>> but that doesn't change the fact that I sympathize with those who did.
>>
>> Dave  AB7E
>>
>>
>>
>> On 3/30/2021 8:55 AM, Lyn Norstad wrote:
>>> I can’t imagine how it would feel to know that I had laid out $4k 
>>> two years ago, and still be waiting for fulfillment.  NO, actually I 
>>> can.
>>>
>>>
>>> Several years ago, an up-and-coming system integration business I 
>>> had been associated with for several years (as a VAR) was going thru 
>>> many of the same types of growing pains in bringing a wonderful new 
>>> product to market.  The CEO vowed he would run the business as if 
>>> they were broke, which they very nearly were.  But the employees 
>>> were faithful believers in the company and the product, and worked 
>>> very hard to make it a success.
>>>
>>>
>>> Early one Monday morning, I had a call from that CEO advising me 
>>> that they had sold the company to another industry player (a 
>>> non-competitor) and that they wanted me to join them for lunch to 
>>> discuss the deal. My fear and trepidation slowly disappeared that 
>>> day as I met the new management “team” (with all the old R&D team 
>>> still hard at work), got viable answers to all the hard questions 
>>> and quickly recognized how an immediate cash infusion ($10 Million) 
>>> had an amazing ability to totally turn things around, grease the 
>>> wheels, and create an industry shakeup that precipitated a wave of 
>>> further consolidation and rapid development.
>>>
>>>
>>> It was a win-win situation born out of the impending potential 
>>> disaster we had all feared.
>>>
>>>
>>> Hang in there.  Times might seem tough, but there are some very 
>>> smart people at work here.
>>>
>>>
>>> 73
>>>
>>> Lyn, W0LEN
>>>
>>>
>>> From: elecraft...@groups.io <mailto:elecraft...@groups.io> 
>>> [mailto:elecraft...@groups.io <mailto:elecraft...@groups.io>] On 
>>> Behalf Of Ted Roycraft
>>> Sent: Monday, March 29, 2021 4:44 PM
>>> To: elecraft...@groups.io <mailto:elecraft...@groups.io>
>>> Subject: Re: [Elecraft-K4] Where are the K4 reviews?
>>>
>>>
>>> The natives are getting restless and it would be good to hear 
>>> something official from Elecraf

Re: [Elecraft] K3 - no output power

[Ray]

Harald
I think you need to start at Ground Zero,,
Go to your Elecraft Utility
And connect to the K3 Radio and verify
The Firmware is present (05.67 ect)
I would go to the Basic mode of operations.
Set K3 to SSB operation Upper or  Lower , Freq middle of band. 
Set radio to PTT (not VOX) Ant 1, load to Ant 1.
Verify on K3 DVM , voltage is 13 volts.
Push Tune button (long for TX – with RF)
Adjust PWR knob Clockwise for Max RF power.
Take readings………. Ray WA6VAB  K3  

From: Christian Janssen DL1MGB
Sent: Wednesday, March 24, 2021 1:49 PM
To: Harald Fritzsche (DD0VS); elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 - no output power

Hi Harald,

spectrum analyzer and more space on the table would be the best, but both not 
available :-)

Additional information:
- internal voltage / current (DISP)
  
Standby: 13.8 V / 0.86 A
Tune: 13.4 V / 3.20 A

And still no power output on the external wattmeter.

It seems that there is something produced, but it doesn't exit the K3.

I also did an EE INIT, ut no change.

73s Chris



Am 24.03.2021 um 21:32 schrieb Harald Fritzsche (DD0VS):
> Hello Chris,
> 
>  
> 
> strange is, that your Display does not show a frequency, but it should.
> 
>  
> 
> I had a water Intrusion in 2019 which causes several defects.
> 
> I was testing along the Signal path to see the Signal (with RSP-spectrum 
> analyzer), that helped me, to find the defects. It tooks a while also with 
> help of the list here.
> 
>  
> 
> Receiving is working?
> 
>  
> 
> Vy73 & GL
> 
> Harald
> 
> DD0VS
> 
>  
> 
>  
> 
>  
> 
> Gesendet von Mail <https://go.microsoft.com/fwlink/?LinkId=550986> für 
> Windows 10
> 
>  
> 
> *Von: *Christian Janssen DL1MGB <mailto:ch...@dl1mgb.com>
> *Gesendet: *Mittwoch, 24. März 2021 21:05
> *An: *elecraft@mailman.qth.net <mailto:elecraft@mailman.qth.net>
> *Betreff: *[Elecraft] K3 - no output power
> 
>  
> 
> Hello,
> 
>  
> 
> it happened during the Russian DX Contest last Saturday, from one second to 
> another. No output. When I tune the display looks like this: 
> http://dl1mgb.com/temp/k3_no_power.jpg
> 
>  
> 
> Following conditions:
> 
>  
> 
> - sending into a 50 ohm dummy load
> 
> - no matter how many watts are set with PWR knob
> 
> - Test mode off
> 
> - TX INH off
> 
> - all driver transistors working (three screw test)
> 
> - no output power also on external watt meter
> 
> - happens on all bands
> 
> - happens with KPA set to "not inst"
> 
> - knocking on housing doesn't change anything
> 
> - when starting the antenna tuner, it says 5.0 watts, but no output on the 
> external watt meter
> 
>  
> 
> I am running out of ideas :-)
> 
>  
> 
> 73s Chris DL1MGB
> 
> __
> 
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> 
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>  
> 
> This list hosted by: http://www.qsl.net
> 
> Please help support this email list: http://www.qsl.net/donate.html
> 
> Message delivered to dd...@gmx.de
> 
>  
> 
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Re: [Elecraft] K3 resting current

[Ray]

Igor……
I don’t have the Installation info on the K3, 
But I found the Transistor data online for the RD100HHF.
It is 1 Amp Idq. For Each Fet.  Also a Amplifier Build Project.
http://k9ivb.net/munin2/

WA6VAB   Ray  K3  


From: Igor Sokolov
Sent: Tuesday, February 9, 2021 9:46 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3 resting current

Can somebody please give me the recommended resting current of the K3 
final stage.  Pair of transistors RD100HHF.

Thank you in advance

73, Igor UA9CDC

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Re: [Elecraft] KPA-1500 power reading?

[Ray]

Trust the Wattmeter Only if it is seeing a 50 Ohm Dummy Load.

WA6VAB  Ray


From: Jim McCook
Sent: Saturday, February 6, 2021 11:35 AM
To: Elecraft Reflector
Subject: Re: [Elecraft] KPA-1500 power reading?

I trust my Bird 43 wattmeter that's in line with the amplifier output, 
so I recalibrated the KPA-1500 wattmeter reading per band to correlate 
more closely with it.  See WMTR ADJUST in the KPA-1500 menu.  Jim W6YA
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[Elecraft] K4 Panadaptor Display

[Ray Spreadbury via Elecraft]

As the originator of this thread I would like to comment on the answers 
received so far.

There have been suggestions that:
1. You can’t do it, except by using a quadrant monitor which can accept say 4 
inputs!
2. You can achieve a similar result by using the N1MM Spectrum Display!
3. You can do it with a bit of easily available splitter hardware!
4. You can achieve a similar result by using an SDR display with your K4!
5. You can maybe do it by using some additional software – possibly the K4RV 
remote software currently in development?

It seems to me that it would be a really good idea if Wayne or someone else 
from Elecraft could please clarify the situation and possibilities?

For completeness, my original question was:
I wonder if it is possible to show the K4 panadaptor(s) display as a separate 
floating window on the external monitor? 
So that for example you could have your logging program windows open as well as 
a separately floating K4 panadaptor display showing on the same monitor.
73 Ray G3XLG

73 Ray G3XLG

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[Elecraft] K4 Panadaptor Display

[Ray Spreadbury via Elecraft]

Thanks for the quick answer Grant (& also Ed W0YK). 
That is more than a little disappointing as it means that as a contester for 
example, you either have to have two or more displays (ie. One for a logging 
program & one for the K4 display) or buy a much more expensive display which 
enables you to have separate quadrants for separate programs? This seems a 
rather retrograde step compared to most other current transceivers or have I 
misunderstood? I suppose you could use the touch screen display as an 
alternative but why not output the K4 display to your PC and then put both 
outputs onto a single screen?
73
Ray G3XLG

Sent from Mail for Windows 10

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[Elecraft] K4 Panadaptor Display

[Ray Spreadbury via Elecraft]

I wonder if it is possible to show the panadaptor(s) display as a separate 
floating window on the external monitor? 
So that for example you could have your logging program windows open as well as 
a separately floating K4 panadaptor display showing on the same monitor.
73 Ray G3XLG

Sent from Mail for Windows 10

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Re: [Elecraft] tip of 3.5 mm plug remains in key jack

[Ray]

Hi Jim
I worked as a Components Engineer at a Number of large Computer company’s,
And was fortunate Not to have run into any Fake’s,
But I did see on a number of Occasions where Firms would go out looking for 
Cheaper PC Boards or Fast turn around Fabs and Go Off Shore!
They Just handed there ”intellectual property”  to the World !
……….. just my 2 cents worth……..  Ray  WA6VAB  K3   


From: Wes
Sent: Saturday, January 16, 2021 7:32 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] tip of 3.5 mm plug remains in key jack

Well, when you send your intellectual property and designs to China to get your 
stuff build cheap you should expect that they will steal it and undercut you.  
False economy.

Wes  N7WS


On 1/16/2021 1:48 PM, Jim Brown wrote:
> On 1/15/2021 4:09 PM, Gwen Patton wrote:
>> I had to do this, too, on my KX3. I had to open it up and use a lockpick to
>> push the broken tip out from the back of the jack.
>
> For almost 30 years, I've served on international Standards Working Groups 
> (of 
> the Audio Engineering Society Standards Committee) with representatives of 
> the 
> world's two manufacturers of quality audio connectors, Switchcraft (US) and 
> Neutrik (EU). In our meetings, both have recounted problems they have with 
> counterfeit versions of connectors produced in China. I'm also a member of 
> the 
> Working Group on Microphones, and major mic manufacturers have long had the 
> same problem with their products.
>
> Among the defects of the counterfeit connectors are 1) lousy construction, so 
> that they fall apart and 2) they don't conform to the physical size 
> definitions of the Standard for the part they claim to be.
>
> As long as 20 years ago, I was reading about counterfeit fasteners causing 
> problems for aircraft manufacturers.
>
> 73, Jim K9YC 

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Re: [Elecraft] 80 meter net

[Ray]

John…. I would not Trust the information on Wikipedia.
Use the ARRL site for the information you are looking for on Band / Mode of 
operations.
WA6VAB  Ray   K3  


From: j...@kk9a.com
Sent: Tuesday, January 12, 2021 8:14 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] 80 meter net

Everything at my station shows the band as 80m, regardless of mode.  
The ARRL Band map shows it as 80m:   
http://www.arrl.org/files/file/Regulatory/Band%20Chart/Band%20Chart%208_5%20X%2011%20Color.pdf
 and so does  
wikipedia:
https://en.wikipedia.org/wiki/Amateur_radio_frequency_allocations


John KK9A

John k4wj wrote:
The SSB frequencies are usually referred to as the 75 meter phone band  
to distinguish them from the CW portion.

John/K4WJ


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Re: [Elecraft] External sound card advice needed to attach to K3

[Ray]

I had Lots of work.  Fixing the So called Garu’s problems !
Thanks   WA6VAB  

Sent from Mail for Windows 10

From: w...@w2xj.net
Sent: Friday, January 1, 2021 5:42 PM
To: Ray
Cc: donov...@erols.com; elecraft@mailman.qth.net
Subject: Re: [Elecraft] External sound card advice needed to attach to K3

Famous last words. The reason I have never hired Hams!

Sent from my iPad

> On Jan 1, 2021, at 7:19 PM, Ray  wrote:
> 
> Save your money!   

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Re: [Elecraft] External sound card advice needed to attach to K3

[Ray]

I use my standard computers sound card for Digital Mode, works Fine.
Save your money!   Ray WA6VAB K3 

Windows 10

From: donov...@erols.com
Sent: Friday, January 1, 2021 2:31 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] External sound card advice needed to attach to K3

Transmitting voice or music to the FT8 interface is a big problem for 
other users. It creates interference across the entire SSB filter bandwidth, 
not just in a single FT8 signal bandwidth. If you operate FT8 or any 
other digital mode you hear Microsoft musical notes and voice every day. 


The most reliable way to avoid interfering with every other FT8 user 
is to use an external sound card. 


73 
Frank 
W3LPL 






- Original Message -

From: "Bill Frantz"  
To: "Rick Bates, NK7I"  
Cc: elecraft@mailman.qth.net 
Sent: Friday, January 1, 2021 10:14:13 PM 
Subject: Re: [Elecraft] External sound card advice needed to attach to K3 

I know the public service/emcom people have pushed on this 
issue, because a fair number of public service events involve 
providing communication support for parades, and parades have 
bands, and bands are quite loud and overcome even a noise 
canceling microphone. I think there has even been an official 
ruling that these incidental sounds, that come along for the 
ride with legal communication, won't get you a notice from the FCC. 

Now transmitting voice in the CW bands is a different story. For 
starts, it's not incidental to legal communication. 

73 Bill AE6JV 

On 1/1/21 at 1:22 PM, rick.n...@gmail.com (Rick Bates, NK7I) wrote: 

>Defined in the simplest of terms, any sound transmitted other 
>than for the purposes of communication (voice, tones for 
>digital) is illegal. 
> 
>This includes background music in the same room as the 
>microphone (though generally ignored as part of the 
>environment, in the US; same as telephone 'hold' music in an 
>autopatch; traffic noise etc.) and certainly includes the 
>'musical' sounds from most OS (they offer no communication). 

--- 
Bill Frantz |The nice thing about standards| Periwinkle 
(408)348-7900 |is there are so many to choose| 150 
Rivermead Rd #235 
www.pwpconsult.com |from. - Andrew Tanenbaum | 
Peterborough, NH 03458 

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Re: [Elecraft] Ice on dipole under snow under ice

[Ray]

Your Trying to figure out Propagation ? 

GoodLuck   WA6VAB 

From: David Haines
Sent: Tuesday, December 15, 2020 9:47 AM
To: Louandzip; elecraft@mailman.qth.net
Subject: Re: [Elecraft] Ice on dipole under snow under ice

Update:

With one-quarter of one leg of the dipole still under ice, I got a 
reception report from PSKReporter on FT8 with 2 watts to Italy. That 
shouldn't work, should it?  Maybe the ice doesn't matter?

KD5VXH recalled a discussion in QST on this very subject, where 400W AM 
melted the ice on one leg of the dipole (fed by coax), but not the other.
'
You can follow the controversy in May and July 1960 letters in QST!

david
KC1DNY

On 12/13/2020 4:36 PM, Louandzip wrote:
> I haven't given this a lot of thought but:
>
> 1. Virtually none.  100W most radiated, leaving very little heating 
> the ice/snow along your long cold wire. The wire itself won't heat up 
> as it has very low resistance.
>
> 2. IDK about the KXPA100, but Tune is often done at low power, so if 
> 100W work, Tune certainly won't.
>
> 3.  Need to check the SWR, but even if good initially, may vary a lot 
> as ice/snow situation changes. This might test the SWR capability of 
> the tuner and protection of the amp, which is best left untested.
>
> If you do try it, keep it legal: Check the freq before transmitting, 
> and be sure to identify.  Let us know how it goes. This might be the 
> excuse you've needed to get that legal limit amp you've been wanting.
>
> Lou W7HV
>
>
> On Sunday, December 13, 2020, 11:40:18 AM MST, David Haines 
>  wrote:
>
>
> Before I try something crazy, like climbing up on the roof ... .
>
> We had an ice storm.  The ice pulled my wire dipole down to the roof,
> but didn't break it because one mask was Schedule 30, which leaned over
> nicely.  It then snowed on top of the ice.
>
> I've been able to free the feedline (ladderline) and most of the dipole,
> but part of the dipole is till under the snow under a layer of ice way
> up on the roof.
>
> I'm thinking of running 100W from my KXPA100 to melt it out of there,
> but before I try:
>
> 1.  Is there any chance of this working?
> 2.  Should I just transmit a TUNE through it?
> 3.  Can I damage the KXPA100 or tuner?
>
> Right now the coax is not connected to the KX3 and I haven't tried to
> receive.
>
> david
> KC1DNY
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> Message delivered to louand...@yahoo.com 

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Re: [Elecraft] Firmware development

[Ray]

Seems like this is now the Kenwood page ? 

Sent from Mail for Windows 10

From: j...@kk9a.com
Sent: Thursday, November 26, 2020 8:06 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Firmware development

T

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[Elecraft] K2 RF Gain Potentiometer

[Ray Spreadbury via Elecraft]

I have just got a secondhand K2 # 5835 and find that the RF Gain pot needs 
replacing. The component is available from Elecraft but the shipping cost to 
the UK and the likely long delay means that I would prefer to source this here 
or in Europe from Mouser UK or similar supplier if possible.
I know it’s a 5K linear pot but does anyone know a Mouser part number or other 
supplier please?
Would it be a good idea to replace the 3 other identical pots at the same time?
Similarly does anyone know the Mouser part number for the 5K audio taper AF 
Gain pot?
73
Ray G3XLG

Sent from Mail for Windows 10

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Re: [Elecraft] K2 Firmware & Software

[Ray Spreadbury via Elecraft]

Thank you Don
73 Ray G3XLG

-Original Message-
From: Don Wilhelm  
Sent: 19 October 2020 23:18
To: Ray Spreadbury ; elecraft@mailman.qth.net
Subject: Re: [Elecraft] K2 Firmware & Software

Ray,

I don't know about any software, but the latest firmware is available - the 
most recent is MCU 2.04, IOC 1.09  They must go together - order as FWK2MCIO.  
If you have trouble finding it on the website, just email sa...@elecraft.com to 
order.

To find your currently installed K2 firmware level, hold any button while 
powering the K2 on, the firmware level will be briefly displayed.

73,
Don W3FPR

On 10/19/2020 5:25 PM, Ray Spreadbury via Elecraft wrote:
> I can't find the link to the last versions of firmware & software for 
> the K2.
> 
> I know it was some years ago, but thought it would still be available 
> on the Elecraft site.
> 

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