Re: [Elecraft] 10 METERS IS OUT

[Jim Brown]

That may be why you didn't hear much. At this point in the solar cycle, 
most propagation on 10M  is not very strong, so it takes the 10 dB or so 
advantage of CW over SSB to make many of the QSOs. I'd guess that half 
of those I made on CW would not have been possible on SSB. One of my 
buddies, N6ZFO made 606 CW and 251 SSB QSOs.


I wouldn't call it a free for all, rather a good contest. At times, I 
might see 100 signals on the P3/SVGA between 28,000 and 28,070 kHz, at 
other times as few as a half-dozen. Late morning here I often had 2-3 
callers to a CQ.


73, Jim K9YC

 On 12/13/2020 8:43 PM, Paul Van Dyke wrote:

Sorry Jim
I was on SSB, we are looking as the antenna maybe too tight. I was told 
it was a free for all on CW


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Re: [Elecraft] 10 METERS IS OUT

[Paul Van Dyke]

A a winter weather front may have doomed signals

Paul
KB9AVO

On Sun, Dec 13, 2020, 11:43 PM Paul Van Dyke  wrote:

> Sorry Jim
> I was on SSB, we are looking as the antenna maybe too tight. I was told it
> was a free for all on CW
>
> Paul
> KB9AVO
>
> On Sun, Dec 13, 2020, 11:23 PM Jim Brown 
> wrote:
>
>> On 12/13/2020 7:46 PM, Paul Van Dyke wrote:
>> > Don't feel bad ... TH11DX, K3S, KPA1500... TX .. AR .. and a few
>> others, 10
>> > seemed dead
>>
>> You can't be talking about this weekend -- I made 600 CW QSOs in 55 US,
>> Mexican, and Canadian States/Provinces and ten other countries. I'd
>> guess close to 100 in W8/W9 land. From my QTH near San Francisco I
>> worked several JA, Oceania, South and Central America. No EU or AF.
>> Several guys in my local club beat my score by 10-20%.
>>
>> 73, Jim K9YC
>>
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>
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Re: [Elecraft] 10 METERS IS OUT

[Paul Van Dyke]

Sorry Jim
I was on SSB, we are looking as the antenna maybe too tight. I was told it
was a free for all on CW

Paul
KB9AVO

On Sun, Dec 13, 2020, 11:23 PM Jim Brown  wrote:

> On 12/13/2020 7:46 PM, Paul Van Dyke wrote:
> > Don't feel bad ... TH11DX, K3S, KPA1500... TX .. AR .. and a few others,
> 10
> > seemed dead
>
> You can't be talking about this weekend -- I made 600 CW QSOs in 55 US,
> Mexican, and Canadian States/Provinces and ten other countries. I'd
> guess close to 100 in W8/W9 land. From my QTH near San Francisco I
> worked several JA, Oceania, South and Central America. No EU or AF.
> Several guys in my local club beat my score by 10-20%.
>
> 73, Jim K9YC
>
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Re: [Elecraft] 10 METERS IS OUT

[Jim Brown]

On 12/13/2020 7:46 PM, Paul Van Dyke wrote:

Don't feel bad ... TH11DX, K3S, KPA1500... TX .. AR .. and a few others, 10
seemed dead


You can't be talking about this weekend -- I made 600 CW QSOs in 55 US, 
Mexican, and Canadian States/Provinces and ten other countries. I'd 
guess close to 100 in W8/W9 land. From my QTH near San Francisco I 
worked several JA, Oceania, South and Central America. No EU or AF. 
Several guys in my local club beat my score by 10-20%.


73, Jim K9YC

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Re: [Elecraft] 10 METERS IS OUT

[Paul Van Dyke]

Don't feel bad ... TH11DX, K3S, KPA1500... TX .. AR .. and a few others, 10
seemed dead

Paul
KB9AVO

On Sun, Dec 13, 2020, 10:25 PM John Kountz  wrote:

> Gentlemen,
> With all other bands functioning with grace and power, my K3 (#3271) its
> 10 meter band is dead both barefoot and when connected to my KPA 1500:
> neither receiving nor transmitting.  Any suggestions?
> 73
> John Kountz WO1S
>
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[Elecraft] Elecraft CW Net Report

[kevinr]

Good Evening,

   Subjects of the nets included: persistent but dry snow, router 
setup, conditions on the high bands, CUDA code, dry wells, skimming 
leaves from pools, and the elevation of my mountain home.  Never a dull 
moment.


  On 14049.75 kHz at 2200z:

NO8V - John - MI

K6XK - Roy - IA

K0JFJ - Nick - AZ

K2HYD - Ray - VA

K0DTJ - Brian - CA


  On 7047.5 kHz at 0030z:

W0CZ - Ken - ND

K0DTJ - Brian - CA

K6PJV - Dale - CA

K4WJ - John - FL

W6JHB - Jim - CA

WI6O - John - CA


   The sun was helpful, but neither band was as strong as it was last 
week.  Luckily the noise level was low while QSB was not as deep.  Power 
levels ranged from 12 watts to 1500.  It is always fun to test the 
airwaves and see how you all are doing.  Only 18 months until our 
anniversary; we need a theme :)


   Until next week 73,

  Kevin.  KD5ONS



-



PV = nRT

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Re: [Elecraft] [K3] Locking VFO B

[Ken K6MR]

Dunno.  Works here.

Ken K6MR

From: Victor Rosenthal 4X6GP
Sent: Sunday, December 13, 2020 19:33
To: Ken K6MR; Elecraft 
Reflector
Subject: Re: [Elecraft] [K3] Locking VFO B

Still doesn't work!
When I turn off diversity or the subrx or split, it says "N/A".
Maybe I'm dreaming, but it seems that I once did this.

73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
On 13-Dec-2020 20:14, Ken K6MR wrote:
> Yep, looks like that’s either a bug or a feature.  When in diversity
> mode and BSET using LOCK gives the same response as RX ANT.  Maybe what
> it’s trying to say is that you can’t lock B because it is already
> “locked” to VFO A .
>
> Ken K6MR
>
> *From: *Victor Rosenthal 4X6GP 
> *Sent: *Sunday, December 13, 2020 04:45
> *To: *Ken K6MR ; Elecraft Reflector
> 
> *Subject: *Re: [Elecraft] [K3] Locking VFO B
>
> That's what I thought. But I got a response like this: [MAIN], and it
> didn't do anything.
>
> Maybe the fact that I was in diversity at the time had something to do
> with it. I'll turn off diversity and try it again.
>
> 73,
> Victor, 4X6GP
> Rehovot, Israel
> CWops #5
> Formerly K2VCO
> https://www.qsl.net/k2vco/ 
> On 13/12/2020 6:27, Ken K6MR wrote:
>  > Long press A/B (BSET) and then long press RATE (Lock)
>  >
>  > Ken K6MR
>  >
>  > *From: *Victor Rosenthal 4X6GP  >
>  > *Sent: *Saturday, December 12, 2020 20:24
>  > *To: *Elecraft Reflector  >
>  > *Subject: *[Elecraft] [K3] Locking VFO B
>  >
>  > I seem to recall that there was a way to lock the K3's VFO B without
>  > locking VFO A. Am I imagining this, or is it possible?
>

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Re: [Elecraft] [K3] Locking VFO B

[Victor Rosenthal 4X6GP]

Still doesn't work!
When I turn off diversity or the subrx or split, it says "N/A".
Maybe I'm dreaming, but it seems that I once did this.

73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
On 13-Dec-2020 20:14, Ken K6MR wrote:
Yep, looks like that’s either a bug or a feature.  When in diversity 
mode and BSET using LOCK gives the same response as RX ANT.  Maybe what 
it’s trying to say is that you can’t lock B because it is already 
“locked” to VFO A .


Ken K6MR

*From: *Victor Rosenthal 4X6GP 
*Sent: *Sunday, December 13, 2020 04:45
*To: *Ken K6MR ; Elecraft Reflector 


*Subject: *Re: [Elecraft] [K3] Locking VFO B

That's what I thought. But I got a response like this: [MAIN], and it
didn't do anything.

Maybe the fact that I was in diversity at the time had something to do
with it. I'll turn off diversity and try it again.

73,
Victor, 4X6GP
Rehovot, Israel
CWops #5
Formerly K2VCO
https://www.qsl.net/k2vco/ 
On 13/12/2020 6:27, Ken K6MR wrote:
 > Long press A/B (BSET) and then long press RATE (Lock)
 >
 > Ken K6MR
 >
 > *From: *Victor Rosenthal 4X6GP >

 > *Sent: *Saturday, December 12, 2020 20:24
 > *To: *Elecraft Reflector >

 > *Subject: *[Elecraft] [K3] Locking VFO B
 >
 > I seem to recall that there was a way to lock the K3's VFO B without
 > locking VFO A. Am I imagining this, or is it possible?


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[Elecraft] 10 METERS IS OUT

[John Kountz]

Gentlemen,
With all other bands functioning with grace and power, my K3 (#3271) its 10 
meter band is dead both barefoot and when connected to my KPA 1500: neither 
receiving nor transmitting.  Any suggestions?
73
John Kountz WO1S

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Re: [Elecraft] Tuning Random-Length Wire Antenna with K3 Internal Tuner??

[Jim H via Elecraft]

I agree on the overthinking. How about the Elecraft AX1 ant?  All you need 
extra is coax and a tripod. It takes me 10-15 min max to get on the air. The 
only limitation is no 80, 60 and 10 meters Sorta works on these bands if you 
play with the whip and use the ATU. YMMV 73Jim Hk7sss.  In a message dated 
12/13/2020 12:40:10 PM Pacific Standard Time, ghyoung...@gmail.com writes: 
I can’t help but think we’re over-thinking this.

I think the original post was regarding ‘portable' operation.  When I go 
portable I don’t carry a large antenna with lots of wire or weight.  I usually 
carry a 41’ (non-resonant) wire with a 9:1 unun rated at 300w watts, and a 
throwing line and weight to get the far end of the wire up in a tree. I have a 
large OCFD and a 40’ fiberglass’s mast to get it up, but frankly, for quickie 
portable, getting the center pole staked and up and guyed is more trouble than 
its worth.  If it was for a weekend or a week, maybe.  But I’d rather spend the 
time operating.  I’ve used the simple wire with both a K3 and KX3 with internal 
ATUs.  Works fine.  Nothing has ever cooked.  The internal ATUs typically get 
SWR to 1.2:1 or better.  Feedline is 25 feet of RG-58 choked off a foot before 
the radio termination.

Sure, some power is getting lost in the tuner, the balun, the feedline, the 
connectors, human absorption, whatever.  But … 

Grant NQ5T

 
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[Elecraft] 40 meter net 12-13-20

[Steve Hall]

WM6P STEVE  GA   K3S
K8NU  CARL OH  K3S
K1NW  BRIAN   RIK3
AB7HA FRANK GA   KX3
K6VWESTANMIK3
WB9JNZ   ERICIL K3
N4NRWROGERSC   K3
KB9AVO   PAULINK3S
NC0JW JIM   CO  KX3
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[Elecraft] A question about QRQ

[edauer]

A question about QRQ mode . . . 

I recently read a comment about the fact that QRQ cannot be used when the K3
is operating in RIT, XIT, or split, nor with DSP shift.  Because I believe,
though I am not certain, that the discussion was about whether this
incompatibility exists in the K4, I was curious about why it matters.  When
the K3s came out, and the new synths were made available for the K3, QRQ was
no longer necessary for even very high CW speeds.  If that is so, why would
there be a question about such a limitation on QRQ in the K4?  Does QRQ mode
have advantages beyond the fast QSK now built into the SOP system?  

Ted, KN1CBR


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

[Lyn Norstad]

David -

Living in Chicagoland, I face similar issues now and then.  In fact, just a 
couple weeks ago we had a very heavy frost.  My 360 foot EDZ (dipole) which is 
normally nearly invisible, suddenly looked like a 2" white PVC pipe.  It 
sagged, but not much.  A couple hours' worth of sunlight and a few pops of 
wind, and it was all good.  

Your situation is a bit different, but I've never found that transmitting did 
much to ice.  Or to the little birdies who like to sit on the wire (mostly 
hummingbirds).  That being said, unless you have a steel roof, I don't think it 
would hurt to try.  Ease up on the power just in case.  But first try 
receiving.  I doubt there will be much degradation from the ice.

73
Lyn, W0LEN

-Original Message-
From: elecraft-boun...@mailman.qth.net 
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David Haines
Sent: Sunday, December 13, 2020 12:39 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Ice on dipole under snow under ice

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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Re: [Elecraft] PTT keying a KXPA100 with a K2

[Don Wilhelm]

Luc and all,

I have been informed that simply clicking the link I sent may give a 404 
error because somehow a period is picked up as part of the link.

Simply remove the period and it will work fine.

73,
Don W3FPR

On 12/13/2020 12:13 PM, Don Wilhelm wrote:

Luc,

The short answer is that will not work.

What you need is an open circuit on receive and a short to ground during 
transmit.


Take a look at the K2(BASIC) External T-R Relay Driver on Tom Hammond's 
(SK) website http://www.mmccs.com/mmarc/n0ss/index_k2.html.  Kits are 
now available from Dave W8FGU d...@w8fgu.com, but the circuit is easy to 
build on perfboard - just follow the full size layout Tom put into his 
instructions.  I have done that several times.


73,
Don W3FPR

On 12/13/2020 5:57 AM, Luc Favre wrote:

Hi,
I own a QRP-K2 with the KIO2 installed.
I want to PTT key a KXPA100 (not KPA100).
May I connect Pin9 from KIO2 (8V in receive mode and 0V in transmit 
mode) directly with the PTT-IN connector on the KXPA100 (5V receive, 0 
V transmit) ? Maybe with a diode (cathode KIO2, anode KXPA100) ?

Thank you for advice
73
Luc F6HJO/HB9ABB

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

[Louandzip via Elecraft]

 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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Re: [Elecraft] Internal tuner with random wire

[Jim Rhodes]

Sure if you have the time and supports, but if you are setting up a
temporary station for a few hours you don't want to waste operating time. A
9:1 or even 4:1 unun can get you on the air quick. Need only 1 support. A
counterpoise and a choke of some kind on the feedline does help.


On Sat, Dec 12, 2020, 23:22 Bob McGraw K4TAX  wrote:

> The comments are good .  But considering all the pluses and minuses,
> wouldn’t it make more sense to use a OCFD and not worry about ground rods,
> counterpoise needs, high SWR, high voltage and currents in the tuner?   A
> well designed OCFD with correct Balun plus a common mode choke at the feed
> point and another at the radio will cover 80M - 10M with much less than a
> 10:1 SWR.
>
> A matched condition exists only between the ATU input and the PA output.
> The output voltage or current can be all over the place, including inside
> the ATU circuits.   And the ATU has a 10:1 matching range of 5 ohms to 500
> ohms.  Random wires can easily be outside of this range.  Thus the ATU can
> not effectively match the load.
>
> Bob, K4TAX
>
>
> Sent from my iPhone
>
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Re: [Elecraft] Tuning Random-Length Wire Antenna with K3 Internal Tuner??

[Grant Youngman]

I can’t help but think we’re over-thinking this.

I think the original post was regarding ‘portable' operation.  When I go 
portable I don’t carry a large antenna with lots of wire or weight.  I usually 
carry a 41’ (non-resonant) wire with a 9:1 unun rated at 300w watts, and a 
throwing line and weight to get the far end of the wire up in a tree. I have a 
large OCFD and a 40’ fiberglass’s mast to get it up, but frankly, for quickie 
portable, getting the center pole staked and up and guyed is more trouble than 
its worth.  If it was for a weekend or a week, maybe.  But I’d rather spend the 
time operating.  I’ve used the simple wire with both a K3 and KX3 with internal 
ATUs.  Works fine.  Nothing has ever cooked.  The internal ATUs typically get 
SWR to 1.2:1 or better.  Feedline is 25 feet of RG-58 choked off a foot before 
the radio termination.

Sure, some power is getting lost in the tuner, the balun, the feedline, the 
connectors, human absorption, whatever.   But … 

Grant NQ5T


> On Dec 13, 2020, at 2:19 PM, donov...@erols.com wrote:
> 
> Examining the KAT3A circuit board, I doubt it can handle more than 
> 1000 volts that a worst case random wire -- or a fault -- could cause 
> at the output of the KAT3A tuner when the K3 is producing full rated 
> output. But its unlikely that the KAT3A can produce full rated K3 
> output because of inevitable low tuner efficiency at high VSWRs. 
> 
> 

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Re: [Elecraft] Tuning Random-Length Wire Antenna with K3 Internal Tuner??

[donovanf]

Examining the KAT3A circuit board, I doubt it can handle more than 
1000 volts that a worst case random wire -- or a fault -- could cause 
at the output of the KAT3A tuner when the K3 is producing full rated 
output. But its unlikely that the KAT3A can produce full rated K3 
output because of inevitable low tuner efficiency at high VSWRs. 


I've never connected an antenna with a greater than 10:1 VSWR to 
my KAT3A tuner. I would never intentionally do that because of the 
stress it would could cause to the tuner components from high voltage 
and/or high current and inevitable poor tuner efficiency when feeding 
very high VSWR. 


Hopefully the K3's very fast acting excess VSWR detection turns down 
its output power before damage occurs. The K3's excess VSWR 
protection is very effective at preventing damage when the tuner is off. 


A better solution to extreme VSWR that can be caused by a truly random 
length antenna is to use one of the proven commercial multiband wire 
antennas. Just one example of a simple eight band wire antenna that 
definitely will not damage a K3: 


www.dxengineering.com/parts/pez-ef-allbandkw 


73 
Frank 
W3LPL 

- Original Message -

From: "Walter Underwood"  
To: "Elecraft Reflector"  
Sent: Sunday, December 13, 2020 6:45:34 PM 
Subject: Re: [Elecraft] Tuning Random-Length Wire Antenna with K3 Internal 
Tuner?? 

I think you just proved my point. The KAT3A does not have a lower power rating 
for larger SWRs. That would indicate that it can handle the rated power over 
the entire rated SWR range. If extreme SWR at full power would exceed the 
component ratings, the specs would say that. 

This is the entire set of specs for the KAT3A: 

• Maximum impedance match: 10:1 SWR 
• Maximum power handling: 110 watts 

https://elecraft.com/collections/kat3a_model/products/kat3a-100w-atu 

I just curious why people would think that Elecraft publishes specs that their 
equipment does not meet. That is a pretty strong accusation. 

No, I didn’t check out TLW, but I have a solid understanding of transmission 
lines and conjugate matches, even though I only got a B- in my fields and waves 
class at Rice. 

wunder 
K6WRU 
Walter Underwood 
CM87wj 
http://observer.wunderwood.org/ (my blog) 

> On Dec 12, 2020, at 11:12 PM, David Gilbert  wrote: 
> 
> 
> Seriously?? Why do you think that Elecraft's tuners (like just about every 
> other one) have max power ratings that differ depending upon the SWR? For 
> example, for the KAT500 has a max power rating of 1000 watts into a 3:1 SWR 
> but only a 600 watt rating into a 10:1 SWR??? It can match both SWRs, but not 
> handle the same power at both. 
> 
> Did you bother to check out TLW like I suggested? 
> 
> Dave AB7E 
> 
> 
> 
> On 12/12/2020 8:59 PM, Walter Underwood wrote: 
>> Of course there are high voltages or currents in some tuning solutions. Why 
>> do people think the Elecraft ATU would not be designed to handle those? 
>> 
>> wunder 
>> K6WRU 
>> Walter Underwood 
>> CM87wj 
>> http://observer.wunderwood.org/ (my blog) 
>> 
>>> On Dec 12, 2020, at 7:36 PM, David Gilbert  wrote: 
>>> 
>>> 
>>> A matched conditon does NOT prevent the components of the tuner from seeing 
>>> high voltages and/or high currents. Check out TLW ... the transmission line 
>>> application that comes free with the ARRL Antenna Book. Pick a load that 
>>> gives a high SWR and then click on the "Tuner" button for the application 
>>> to draw one of four different tuner configurations for you. The app will 
>>> tell you what the voltages across each component are, and also the power 
>>> loss (i.e., heating effects) in each one. 
>>> 
>>> 73, 
>>> Dave AB7E 
>>> 
>>> 
>>> 
>>> 
>>> On 12/12/2020 8:18 PM, Walter Underwood wrote: 
 Tuning happens at low power, so transients are small. After it is matched, 
 why would the K3 ATU not be rated for full power over the full SWR range? 
 
 Other components might fail, of course. Amphenol UHF connectors are only 
 rated for 500 V. 
 
 wunder 
 K6WRU 
 Walter Underwood 
 CM87wj 
>>> __ 
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>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft 
>>> Help: http://mailman.qth.net/mmfaq.htm 
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>>> 
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>>> Message delivered to wun...@wunderwood.org 
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> 
> __ 
> Elecraft mailing list 
> Home: ht

Re: [Elecraft] Tuning Random-Length Wire Antenna with K3 Internal Tuner??

[Walter Underwood]

I think you just proved my point. The KAT3A does not have a lower power rating 
for larger SWRs. That would indicate that it can handle the rated power over 
the entire rated SWR range. If extreme SWR at full power would exceed the 
component ratings, the specs would say that.

This is the entire set of specs for the KAT3A:

• Maximum impedance match:  10:1 SWR
• Maximum power handling:  110 watts

https://elecraft.com/collections/kat3a_model/products/kat3a-100w-atu

I just curious why people would think that Elecraft publishes specs that their 
equipment does not meet. That is a pretty strong accusation.

No, I didn’t check out TLW, but I have a solid understanding of transmission 
lines and conjugate matches, even though I only got a B- in my fields and waves 
class at Rice.

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Dec 12, 2020, at 11:12 PM, David Gilbert  wrote:
> 
> 
> Seriously??  Why do you think that Elecraft's tuners (like just about every 
> other one) have max power ratings that differ depending upon the SWR?  For 
> example, for the KAT500 has a max power rating of 1000 watts into a 3:1 SWR 
> but only a 600 watt rating into a 10:1 SWR???  It can match both SWRs, but 
> not handle the same power at both.
> 
> Did you bother to check out TLW like I suggested?
> 
> Dave   AB7E
> 
> 
> 
> On 12/12/2020 8:59 PM, Walter Underwood wrote:
>> Of course there are high voltages or currents in some tuning solutions. Why 
>> do people think the Elecraft ATU would not be designed to handle those?
>> 
>> wunder
>> K6WRU
>> Walter Underwood
>> CM87wj
>> http://observer.wunderwood.org/ (my blog)
>> 
>>> On Dec 12, 2020, at 7:36 PM, David Gilbert  wrote:
>>> 
>>> 
>>> A matched conditon does NOT prevent the components of the tuner from seeing 
>>> high voltages and/or high currents.  Check out TLW ... the transmission 
>>> line application that comes free with the ARRL Antenna Book.  Pick a load 
>>> that gives a high SWR and then click on the "Tuner" button for the 
>>> application to draw one of four different tuner configurations for you.  
>>> The app will tell you what the voltages across each component are, and also 
>>> the power loss (i.e., heating effects) in each one.
>>> 
>>> 73,
>>> Dave   AB7E
>>> 
>>> 
>>> 
>>> 
>>> On 12/12/2020 8:18 PM, Walter Underwood wrote:
 Tuning happens at low power, so transients are small. After it is matched, 
 why would the K3 ATU not be rated for full power over the full SWR range?
 
 Other components might fail, of course. Amphenol UHF connectors are only 
 rated for 500 V.
 
 wunder
 K6WRU
 Walter Underwood
 CM87wj
>>> __
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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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 wun...@wunderwood.org
>> __
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> 
> __
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[Elecraft] Ice on dipole under snow under ice

[David Haines]

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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Re: [Elecraft] [K3] Locking VFO B

[Ken K6MR]

Yep, looks like that’s either a bug or a feature.  When in diversity mode and 
BSET using LOCK gives the same response as RX ANT.  Maybe what it’s trying to 
say is that you can’t lock B because it is already “locked” to VFO A .

Ken K6MR

From: Victor Rosenthal 4X6GP
Sent: Sunday, December 13, 2020 04:45
To: Ken K6MR; Elecraft 
Reflector
Subject: Re: [Elecraft] [K3] Locking VFO B

That's what I thought. But I got a response like this: [MAIN], and it
didn't do anything.

Maybe the fact that I was in diversity at the time had something to do
with it. I'll turn off diversity and try it again.

73,
Victor, 4X6GP
Rehovot, Israel
CWops #5
Formerly K2VCO
https://www.qsl.net/k2vco/
On 13/12/2020 6:27, Ken K6MR wrote:
> Long press A/B (BSET) and then long press RATE (Lock)
>
> Ken K6MR
>
> *From: *Victor Rosenthal 4X6GP 
> *Sent: *Saturday, December 12, 2020 20:24
> *To: *Elecraft Reflector 
> *Subject: *[Elecraft] [K3] Locking VFO B
>
> I seem to recall that there was a way to lock the K3's VFO B without
> locking VFO A. Am I imagining this, or is it possible?

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[Elecraft] WTB K-Pod

[NickL]

If anyone is willing to part with the K-Pod please contact me off list

nick.ve3ey[at]gmail[dot]com

73

Nick VE3EY

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Re: [Elecraft] PTT keying a KXPA100 with a K2

[Don Wilhelm]

Luc,

The short answer is that will not work.

What you need is an open circuit on receive and a short to ground during 
transmit.


Take a look at the K2(BASIC) External T-R Relay Driver on Tom Hammond's 
(SK) website http://www.mmccs.com/mmarc/n0ss/index_k2.html.  Kits are 
now available from Dave W8FGU d...@w8fgu.com, but the circuit is easy to 
build on perfboard - just follow the full size layout Tom put into his 
instructions.  I have done that several times.


73,
Don W3FPR

On 12/13/2020 5:57 AM, Luc Favre wrote:

Hi,
I own a QRP-K2 with the KIO2 installed.
I want to PTT key a KXPA100 (not KPA100).
May I connect Pin9 from KIO2 (8V in receive mode and 0V in transmit 
mode) directly with the PTT-IN connector on the KXPA100 (5V receive, 0 V 
transmit) ? Maybe with a diode (cathode KIO2, anode KXPA100) ?

Thank you for advice
73
Luc F6HJO/HB9ABB

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Re: [Elecraft] KPA500 and KAT500 Enhanced mode tracking **SOLVED**

[Rick KC2FD]

I found my problem. The issue was that even though I successfully
incorporated enhanced mode frequency tracking from the IC7300 to the KPA500
and KAT500, the radio was keying a x0mS burst of RF even though the
frequencies were previously 'learned'. I kept looking into the Elecraft
setups, manual, programming and my converter setup. The problem however was
in a long overlooked menu setting in the 7300! Sometime in the past I had
set "SET, CONNECTORS, FUNCTION, TUNER, PTT Start", to ON which initiates a
tuning cycle to the tuner every time the VFO moves more than 1 kHz. Duh.
I've been looking for this for days. I switched it to OFF and the frequency
tracking works flawlessly. 

In summary, I have the the IC7300 REMOTE serial data connector feeding an
atmega328 microntroller (RX) developed on an Arduino Uno. The code is based
on an open sourced Band Decoder by the talented guys at remoteqth.com. The
TX data is now in the serial format emulating Kenwood transceivers. This
data is converted to RS232 and feeds both the KPA500 and KAT500. The KPA500
menus must be configured to accept SERIAL data at the correct baud rate that
the converter code and IC7300 is set to. In my case I am using 4800 baud.
Although not necessary to go faster, I may try to go up in steps to the
19200 upper limit of the 7300. 

*Using this setup, the KPA500 switches bands as the IC7300 QSYs and even
more importantly, the KAT500 senses the 7300 frequency and switches to the
learned LC combinations for those band segments. This is now done WITHOUT
having to send a burst of RF to the tuner to tell it what band and frequency
segment we are now operating on. Contesters and DXers should find this very
useful as they switch from band to band or QSYing within a band. *

Of course those who operate a K3, K4, Flex or Kenwood transceiver, should be
able to do this inherently. Only ICOM transceivers require this conversion. 

Thanks to Elecraft engineering, remoteqth.com and Rich W2RB for their inputs
on this project. 




--
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Re: [Elecraft] Tuning Random-Length Wire Antenna with K3 Internal Tuner??

[Bill Frantz]

Regardless of what happens to the tuner, the better the untuned 
match, the less power you lose in the matching network, and the 
more power goes out on the air.


73 Bill AE6JV

On 12/13/20 at 10:02 AM, pu...@af2z.net (Drew AF2Z) wrote:

But as someone else has mentioned-- choose an optimal "random" 
length so as to get a good match on multiple bands.


---
Bill Frantz| Privacy is dead, get over | Periwinkle
(408)348-7900  | it.   | 150 Rivermead 
Rd #235
www.pwpconsult.com |- Scott McNealy (1999) | Peterborough, 
NH 03458


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Re: [Elecraft] Tuning Random-Length Wire Antenna with K3 Internal Tuner??

[Drew AF2Z]

The point is that protection is built into the tuner & the firmware to 
take care of extreme instances. As I recall, one release a few years 
back stated that it will handle the parting of an antenna wire while 
transmitting at maximum output. We can assume that a non-resonant 
antenna is not cause for concern. There's not much point in having an 
ATU if it can only be used with resonant antennas.


But as someone else has mentioned-- choose an optimal "random" length so 
as to get a good match on multiple bands.


73,
Drew
AF2Z



On 12/13/20 02:12, David Gilbert wrote:


Seriously??  Why do you think that Elecraft's tuners (like just about 
every other one) have max power ratings that differ depending upon the 
SWR?  For example, for the KAT500 has a max power rating of 1000 watts 
into a 3:1 SWR but only a 600 watt rating into a 10:1 SWR???  It can 
match both SWRs, but not handle the same power at both.


Did you bother to check out TLW like I suggested?

Dave   AB7E



On 12/12/2020 8:59 PM, Walter Underwood wrote:
Of course there are high voltages or currents in some tuning 
solutions. Why do people think the Elecraft ATU would not be designed 
to handle those?


wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)


On Dec 12, 2020, at 7:36 PM, David Gilbert  wrote:


A matched conditon does NOT prevent the components of the tuner from 
seeing high voltages and/or high currents.  Check out TLW ... the 
transmission line application that comes free with the ARRL Antenna 
Book.  Pick a load that gives a high SWR and then click on the 
"Tuner" button for the application to draw one of four different 
tuner configurations for you.  The app will tell you what the 
voltages across each component are, and also the power loss (i.e., 
heating effects) in each one.


73,
Dave   AB7E




On 12/12/2020 8:18 PM, Walter Underwood wrote:
Tuning happens at low power, so transients are small. After it is 
matched, why would the K3 ATU not be rated for full power over the 
full SWR range?


Other components might fail, of course. Amphenol UHF connectors are 
only rated for 500 V.


wunder
K6WRU
Walter Underwood
CM87wj

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Re: [Elecraft] KPA500 and KAT500 Enhanced mode tracking **SOLVED**

[Rick KC2FD]

I found my problem. The issue was that even though I successfully
incorporated enhanced mode frequency tracking from the IC7300 to the KPA500
and KAT500, the radio was keying a x0mS burst of RF even though the
frequencies were previously 'learned'. I kept looking into the Elecraft
setups, manual, programming and my converter setup. The problem however was
in a long overlooked menu setting in the 7300! Sometime in the past I had
set "SET, CONNECTORS, FUNCTION, TUNER, PTT Start", to ON which initiates a
tuning cycle to the tuner every time the VFO moves more than 1 kHz. Duh.
I've been looking for this for days. I switched it to OFF and the frequency
tracking works flawlessly. 

In summary, I have the the IC7300 REMOTE serial data connector feeding an
atmega328 microntroller (RX) developed on an Arduino Uno. The code is based
on an open sourced Band Decoder by the talented guys at remoteqth.com. The
TX data is now in the serial format emulating Kenwood transceivers. This
data is converted to RS232 and feeds both the KPA500 and KAT500. The KPA500
menus must be configured to accept SERIAL data at the correct baud rate that
the converter code and IC7300 is set to. In my case I am using 4800 baud.
Although not necessary to go faster, I may try to go up in steps to the
19200 upper limit of the 7300. 

*Using this setup, the KPA500 switches bands as the IC7300 QSYs and even
more importantly, the KAT500 senses the 7300 frequency and switches to the
learned LC combinations for those band segments. This is now done WITHOUT
having to send a burst of RF to the tuner to tell it what band and frequency
segment we are now operating on. Contesters and DXers should find this very
useful as they switch from band to band or QSYing within a band. *

Of course those who operate a K3, K4, Flex or Kenwood transceiver, should be
able to do this inherently. Only ICOM transceivers require this conversion. 

Thanks to Elecraft engineering, remoteqth.com and Rich W2RB for their inputs
on this project. 




--
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Re: [Elecraft] KPA500 and KAT500 Enhanced mode tracking **SOLVED**

[Rick KC2FD]

I found my problem. The issue was that even though I successfully
incorporated enhanced mode frequency tracking from the IC7300 to the KPA500
and KAT500, the radio was keying a x0mS burst of RF even though the
frequencies were previously 'learned'. I kept looking into the Elecraft
setups, manual, programming and my converter setup. The problem however was
in a long overlooked menu setting in the 7300! Sometime in the past I had
set "SET, CONNECTORS, FUNCTION, TUNER, PTT Start", to ON which initiates a
tuning cycle to the tuner every time the VFO moves more than 1 kHz. Duh.
I've been looking for this for days. I switched it to OFF and the frequency
tracking works flawlessly. 

In summary, I have the the IC7300 REMOTE serial data connector feeding an
atmega328 microntroller (RX) developed on an Arduino Uno. The code is based
on an open sourced Band Decoder by the talented guys at remoteqth.com. The
TX data is now in the serial format emulating Kenwood transceivers. This
data is converted to RS232 and feeds both the KPA500 and KAT500. The KPA500
menus must be configured to accept SERIAL data at the correct baud rate that
the converter code and IC7300 is set to. In my case I am using 4800 baud.
Although not necessary to go faster, I may try to go up in steps to the
19200 upper limit of the 7300. 

*Using this setup, the KPA500 switches bands as the IC7300 QSYs and even
more importantly, the KAT500 senses the 7300 frequency and switches to the
learned LC combinations for those band segments. This is now done WITHOUT
having to send a burst of RF to the tuner to tell it what band and frequency
segment we are now operating on. Contesters and DXers should find this very
useful as they switch from band to band or QSYing within a band. *

Of course those who operate a K3, K4, Flex or Kenwood transceiver, should be
able to do this inherently. Only ICOM transceivers require this conversion. 

Thanks to Elecraft engineering, remoteqth.com and Rich W2RB for their inputs
on this project. 




--
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Re: [Elecraft] KPA500 and KAT500 Enhanced mode tracking **SOLVED**

[Rick KC2FD]

I found my problem. The issue was that even though I successfully
incorporated enhanced mode frequency tracking from the IC7300 to the KPA500
and KAT500, the radio was keying a x0mS burst of RF even though the
frequencies were previously 'learned'. I kept looking into the Elecraft
setups, manual, programming and my converter setup. The problem however was
in a long overlooked menu setting in the 7300! Sometime in the past I had
set "SET, CONNECTORS, FUNCTION, TUNER, PTT Start", to ON which initiates a
tuning cycle to the tuner every time the VFO moves more than 1 kHz. Duh.
I've been looking for this for days. I switched it to OFF and the frequency
tracking works flawlessly. 

In summary, I have the the IC7300 REMOTE serial data connector feeding an
atmega328 microntroller (RX) developed on an Arduino Uno. The code is based
on an open sourced Band Decoder by the talented guys at remoteqth.com. The
TX data is now in the serial format emulating Kenwood transceivers. This
data is converted to RS232 and feeds both the KPA500 and KAT500. The KPA500
menus must be configured to accept SERIAL data at the correct baud rate that
the converter code and IC7300 is set to. In my case I am using 4800 baud.
Although not necessary to go faster, I may try to go up in steps to the
19200 upper limit of the 7300. 

*Using this setup, the KPA500 switches bands as the IC7300 QSYs and even
more importantly, the KAT500 senses the 7300 frequency and switches to the
learned LC combinations for those band segments. This is now done WITHOUT
having to send a burst of RF to the tuner to tell it what band and frequency
segment we are now operating on. Contesters and DXers should find this very
useful as they switch from band to band or QSYing within a band. *

Of course those who operate a K3, K4, Flex or Kenwood transceiver, should be
able to do this inherently. Only ICOM transceivers require this conversion. 

Thanks to Elecraft engineering, remoteqth.com and Rich W2RB for their inputs
on this project. 




--
Sent from: http://elecraft.365791.n2.nabble.com/
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Re: [Elecraft] KPA500 and KAT500 Enhanced mode tracking **SOLVED**

[Rick KC2FD]

I found my problem. The issue was that even though I successfully
incorporated enhanced mode frequency tracking from the IC7300 to the KPA500
and KAT500, the radio was keying a x0mS burst of RF even though the
frequencies were previously 'learned'. I kept looking into the Elecraft
setups, manual, programming and my converter setup. The problem however was
in a long overlooked menu setting in the 7300! Sometime in the past I had
set "SET, CONNECTORS, FUNCTION, TUNER, PTT Start", to ON which initiates a
tuning cycle to the tuner every time the VFO moves more than 1 kHz. Duh.
I've been looking for this for days. I switched it to OFF and the frequency
tracking works flawlessly. In summary, I have the the IC7300 REMOTE serial
data connector feeding an atmega328 microntroller (RX) developed on an
Arduino Uno. The code is based on an open sourced Band Decoder by the
talented guys at remoteqth.com. The TX data is now in the serial format
emulating Kenwood transceivers. This data is converted to RS232 and feeds
both the KPA500 and KAT500. The KPA500 menus must be configured to accept
SERIAL data at the correct baud rate that the converter code and IC7300 is
set to. In my case I am using 4800 baud. Although not necessary to go
faster, I may try to go up in steps to the 19200 upper limit of the 7300.
*Using this setup, the KPA500 switches bands as the IC7300 QSYs and even
more importantly, the KAT500 senses the 7300 frequency and switches to the
learned LC combinations for those band segments. This is now done WITHOUT
having to send a burst of RF to the tuner to tell it what band and frequency
segment we are now operating on. Contesters and DXers should find this very
useful as they switch from band to band or QSYing within a band. *Of course
those who operate a K3, K4, Flex or Kenwood transceiver, should be able to
do this inherently. Only ICOM transceivers require this conversion. Thanks
to Elecraft engineering, remoteqth.com and Rich W2RB for their inputs on
this project. 



--
Sent from: http://elecraft.365791.n2.nabble.com/
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Re: [Elecraft] [K3] Locking VFO B

[Victor Rosenthal 4X6GP]

That's what I thought. But I got a response like this: [MAIN], and it 
didn't do anything.


Maybe the fact that I was in diversity at the time had something to do 
with it. I'll turn off diversity and try it again.


73,
Victor, 4X6GP
Rehovot, Israel
CWops #5
Formerly K2VCO
https://www.qsl.net/k2vco/
On 13/12/2020 6:27, Ken K6MR wrote:

Long press A/B (BSET) and then long press RATE (Lock)

Ken K6MR

*From: *Victor Rosenthal 4X6GP 
*Sent: *Saturday, December 12, 2020 20:24
*To: *Elecraft Reflector 
*Subject: *[Elecraft] [K3] Locking VFO B

I seem to recall that there was a way to lock the K3's VFO B without
locking VFO A. Am I imagining this, or is it possible?

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[Elecraft] PTT keying a KXPA100 with a K2

[Luc Favre]

Hi,
I own a QRP-K2 with the KIO2 installed.
I want to PTT key a KXPA100 (not KPA100).
May I connect Pin9 from KIO2 (8V in receive mode and 0V in transmit 
mode) directly with the PTT-IN connector on the KXPA100 (5V receive, 0 V 
transmit) ? Maybe with a diode (cathode KIO2, anode KXPA100) ?

Thank you for advice
73
Luc F6HJO/HB9ABB

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