Re: [Elecraft] rust remover

[AJSOENKE]

If it's just a small bit of surface rust - try a little coca-cola on a  
'Q-Tip'. Then rinse with clean water and follow up with  an alcohol  swab.  The 
Coke has just enough Phosphoric acid to be effective and after  the water swab 
rinse - the alcohol will dry it better than a paper towel to keep  it from 
re-rusting. A dab of WD-40 on a 'Q'-Tip will prevent further rust if it  won't 
affect anything else.
 
AL WA6VNN



** Get a sneak peek of the all-new AOL at 
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Re: [Elecraft] K3 Accessory Connector

[Lyle Johnson]

I THINK that the K3 accessory connector is a standard 15-pin high density
D-sub female connector.  Is this correct?


Yes, it is. DE-15P is the mating connector.

73,

Lyle KK7P

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RE: [Elecraft] K3 Accessory Connector

[Ed Muns]

> I THINK that the K3 accessory connector is a standard 15-pin 
> high density D-sub female connector.  Is this correct?  The 
> connector in the photo only has 14 pins.  I'm placing an 
> order to Mouser and I want to go ahead and get a couple of 
> male connectors.  The HD-15 D-sub male is Mouser part number
> 156-1815 (plus a 156-2010 hood).

Yes, the Accessory port is a standard DE15S jack and the rear panel drawing
is slightly in error by showing only 14 pins.  I ordered a supply of the
mating DE15P connectors from Mouser and made up some cables for FSK, PTT and
the AuxBus to the KRC2.  

73,
Ed - W0YK

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[Elecraft] K3 Accessory Connector

[Phil & Debbie Salas]

I THINK that the K3 accessory connector is a standard 15-pin high density
D-sub female connector.  Is this correct?  The connector in the photo only
has 14 pins.  I'm placing an order to Mouser and I want to go ahead and get
a couple of male connectors.  The HD-15 D-sub male is Mouser part number
156-1815 (plus a 156-2010 hood).

Phil - AD5X

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[Elecraft] Re: Rust Remover

[Michael Koetje]

I would try a car care product call Never Dull. It is made by Eagle Products
I believe. It comes in a black tin can. It will remove the rust and shine
and protect the metal. I hope this helps. 

 

73's, Mike N8XPQ

 

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Re: [Elecraft] K2 - Adjusting L34 with Spectrogram

[JT Croteau]

It looks like I goofed in my last screen captures.  Here are some new
shots, one for each filter setting, of my tweaking L34 with
Spectrogram.

1.5 kHz Filter:
http://tinyurl.com/2rla5d

700 Hz
http://tinyurl.com/2k9p7f

400 Hz
http://tinyurl.com/2lrr8p

200 Hz
http://tinyurl.com/3dyj37

I haven't attempted to tune the filters yet as I am not yet finished
construction.  This is just initial adjustment of L34.

-- 
JT Croteau, N1ESE - Manchester, NH
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Re: [Elecraft] K2 - Adjusting L34 with Spectrogram

[JT Croteau]

On 8/28/07, Michael J Carter <[EMAIL PROTECTED]> wrote:
> Could the weak(-53 dB) spike just be 2nd harmonic of the audio
> fundamental spike?

No, it was a spurious emission from something but I'm not sure what.
My latest experiment of playing with L34 and SG is much cleaner:

http://tinyurl.com/26hfrb

AF Gain was set around 2-o'clock with very little gain on the line
input level of the sound card as shown here:

http://tinyurl.com/2dzho4

I can get rid of the noise completely as spectrogram sees it but the
signal drops about -25 dB.  I hear white noise along with the signal
when spectrogram sees nothing.

-- 
JT Croteau, N1ESE - Manchester, NH
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[Elecraft] Just drilled K2 #6233

[JT Croteau]

Took a break from the slobbering iron and decided to take some heavy
equipment to the K2 heatsink:

http://tinyurl.com/35gb65
http://tinyurl.com/35uukm

I used a punch instead of a drill so I could get a cleaner hole.  The
RCA jack is for a fixed level audio output circuit (W3FPR design) for
feeding the computer when using digital modes.

-- 
JT Croteau, N1ESE - Manchester, NH
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[Elecraft] Re: Elecraft Digest, Vol 40, Issue 32

[Dave G4AON]

Dave

I use a Kenwood MC-43S, they are £19.95 at Waters and Stanton. Kenwood 
microphones are easy to wire with a K2, I used computer "jumpers" to 
link the appropriate header pins - no need to solder link wires.


73 Dave, G4AON
K1 #1154, K2 #1892, K3 <#200 (fingers crossed)


Dave, G0AYD wrote:

Hi,
 Names Dave CALL G0AYD,HAVE K2 qrp version but  fully loaded,any of you 
guys suggest a mic at present am using it on cw but  would dearly like to try 
the quacky duck end of the band.Regards  Dave..


  


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[Elecraft] Re: Elecraft Digest, Vol 40, Issue 26

[David Ferrington, M0XDF]

And at some point in the future, a keyboard?

Now, what for all the - that's not CW comments
:-)


On 23/8/07 09:04, "[EMAIL PROTECTED]"
<[EMAIL PROTECTED]> sent:

> Message: 39
> Date: Wed, 22 Aug 2007 15:18:52 -0700
> From: wayne burdick <[EMAIL PROTECTED]>
> Subject: [Elecraft] Re: K3 Keyer
> To: Brendan Minish <[EMAIL PROTECTED]>
> Cc: Elecraft Reflector 
> Message-ID: <[EMAIL PROTECTED]>
> Content-Type: text/plain; charset=US-ASCII; format=flowed
>
> Not yet, but it's on the list. You'll also be able to send/receive CW,
> PSK, and FSK using a plain ASCII terminal emulator.
> 
> 73,
> Wayne
> N6KR

-- 
When one door closes another door opens; but we so often look so long and
so regretfully upon the closed door, that we do not see the ones which open
for us. -Alexander Graham Bell, inventor (1847-1922)



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Re: [Elecraft] K2 - Adjusting L34 with Spectrogram

[Michael J Carter]

JT and Don,

Could the weak(-53 dB) spike just be 2nd harmonic of the audio  
fundamental spike?  The main spike looks a bit lower than 600 Hz?   
Just a thought to save looking for another source of the spurious  
signal.


73,

Mike, K8CN
K2 #5569

 Quoting Don Wilhelm <[EMAIL PROTECTED]>:


JT,

Turn the AF gain (or the soundcard line-in setting) up a bit until the
noise in the passband becomes a bit greater.  After that, adjust L34
for the greatest difference between the signal and the noise floor.
Expect some difficulty in determining the proper point - the peak S/N
ratio is still quite broad.  If you do not discern any improvement,
just set the slug for the greatest amplitude on the Spectrogram display
and be done with it. If you cannot discern the difference in S/N ratio
with either your ears or with the Spectrogram display, then the setting
that gives the greatest amplitude is the correct one (and it is a broad
setting).  If your 'best' setting is very far from 1 to 2 turns from
the top of the coil, then check things again because something is wrong
(most likely a soldering problem).

The spike is likely a result of pickup from some local source - check
the things in your house as a first course of action.

73,
Don W3FPR

JT Croteau wrote:

Decided to try pre-aligning L34 using Spectrogram.  However, I've
never played with Spectrogram or anything of the like before.

This screenshot shows the best Signal to Noise ratio I could come up
with.  Does this look about right?

http://tinyurl.com/3bd3m2

Internal signal was found right at 7 MHz and I have FL1 (1.50)
selected per the recommendation of KE0Z.  The -53 dB spike at ~1152 Hz
is oddly interesting to me, is this normal?



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RE: [Elecraft] K3 Receiver Antenna Routing

[Ed Muns]

> The second paragraph from the bottom one page 1 reads ...
> 
> Relay K1 allows the subreceiver to share the main receiver's 
> RF source, or use its auxiliary RF input.  This means that 
> two receiving antennas could be used. But it's also possible 
> to route a single receiving antenna to both the RX ANT IN and 
> AUX RF jacks using a "Y" adapter.  This would allow the 
> subreceiver to use the antenna connected to RX ANT IN even if 
> the main receiver were using ANT 1.  No external splitter is 
> required because only one of the receivers will be connected 
> to the receiving antenna at a time.
> 
> --
> 
> Wayne,
> 
> I don't understand the last sentence in the above paragraph.  
> Am I missing something here?

Normally, if you wanted a single RX antenna to feed both receivers, you'd
have K2 selecting RX ANT and K1 in the "shared RF path mode".  Then, the
internal 3 dB splitter in the K3 would be operative, i.e., with BSET on, the
RX icon should be off ... which indicates the second receiver is sharing the
main receive RF path with the main.

So, while you COULD set it up so both receivers were using their RX antenna
connectors and therefore connected together via the simple Y-adapter, you
should avoid doing so.  Instead, when using a Y-adapter to connect one
receive antenna to both the RX ANT and AUX RF jacks, always make sure the
display RX icon is not simultaneously lit for both the 'ON' and 'OFF' states
of BSET.

73,
Ed - W0YK

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[Elecraft] rust remover

[jgabbard]

Can anybody recommend a remover for a small amount of rust on a chassis? 
Thanks, John  KF7OM 


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Re: [Elecraft] K3 test results?

[Jon Robert Pellant]

Just convert it:

PdBm=20*log(V/Vo)

where Ro=50 ohm,  Pm = 0.001 W, thus Vo=sqrt(0.001*50)= 0.224 V

so for Pdbm = -136:

V=Vo*10^(-136/20)
...

V = 35nV or 0.035uV!

Jon
w1jp

- Original Message - 
From: "Brett gazdzinski" <[EMAIL PROTECTED]>

To: 
Sent: Monday, August 27, 2007 12:38
Subject: [Elecraft] K3 test results?



I have been trying to figure out where the
K3 will fall in the Sherwood receiver test data chart.

http://www.sherweng.com/table.html

The info on the Elecraft web page for the K3 is
different, and I am not sure how one compares...

K3 sensitivity is listed as -136, while the Sherwood page shows 
microvolt's.

Would that correspond to the Sherwood noise floor?
What about the preamp?
 



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[Elecraft] K2 spares

[Bob G3PJT]

Hi

Clearing out the shack and I have found some K2 spare bits

- K2VCOSHLDKTVCO shield mod   £5
- ET215  tilt stand  3"- £5
- Top panel with speaker   - £5

plus P and P

Anyone interested please contact off list

Thanks

Bob G3PJT

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[Elecraft] KX1 Power Output

[Panos]

Hi all

 

KX1 sn #01859 completed and everything (except some unexpected birdies
inside the band) seems

Ok (receiver is fantastic IMO).

 

Power output on 7.100 Mhz is a hair less 3W and on 14.100 Mhz is 2.1-2.2 W

 

According to your experience out there what is best? :

 

a.  Take out the T1 transformer and try to rewind and reinstall it?
b.  OR change the R11 and R30 to their PowerMod values?

 

 

Thanks in Advance

 

73, Panos, SV1COX

 

 

 

 


No virus found in this outgoing message.
Checked by AVG Free Edition. 
Version: 7.5.484 / Virus Database: 269.12.10/976 - Release Date: 27/8/2007
6:20 ii
 
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[Elecraft] K2 mike question...

[Barry McWilliams]

Steve - I believe the answer to your question, "Can the Heil GM-4 work 
with the 10k hooked up from AF to 5V?" is yes.  The Heil Icom cables for 
the GM microphones have a capacitor that isolates the 5V from the GM 
microphone element.


See the description of the Icom setup on the Heil web site -> 
http://www.heilsound.com/amateur/tips/all_icom.htm

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[Elecraft] mic for K2

[H. Cary III]

Dave,

TenTec 701 works great and is very reasonably priced, I purchased mine from 
TenTec for $28 a year or so ago and love it.

73,
Cary, K4TM
K2-100 #5266
"I love my K2!"


-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED]
Sent: Tuesday, August 28, 2007 4:04 AM
To: elecraft@mailman.qth.net
Subject: Elecraft Digest, Vol 40, Issue 32

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Today's Topics:

   1. Re: Elecraft Digest, Vol 40, Issue 31 ([EMAIL PROTECTED])


--

Message: 1
Date: Tue, 28 Aug 2007 03:53:29 EDT
From: [EMAIL PROTECTED]
Subject: [Elecraft] Re: Elecraft Digest, Vol 40, Issue 31
To: elecraft@mailman.qth.net
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="US-ASCII"

Hi,
 Names Dave CALL G0AYD,HAVE K2 qrp version but  fully loaded,any of you
guys suggest a mic at present am using it on cw but  would dearly like to try
the quacky duck end of the band.Regards  Dave..






--

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End of Elecraft Digest, Vol 40, Issue 32

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[Elecraft] K3 Receiver Antenna Routing

[Gary Hvizdak]

The second paragraph from the bottom one page 1 reads ...

Relay K1 allows the subreceiver to share the main receiver's RF source, or
use its auxiliary RF input.  This means that two receiving antennas could be
used. But it's also possible to route a single receiving antenna to both the
RX ANT IN and AUX RF jacks using a "Y" adapter.  This would allow the
subreceiver to use the antenna connected to RX ANT IN even if the main
receiver were using ANT 1.  No external splitter is required because only
one of the receivers will be connected to the receiving antenna at a time.

--

Wayne,

I don't understand the last sentence in the above paragraph.  Am I missing
something here?

TXN,
Gary  KI4GGX

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[Elecraft] K3: Topband: Boring report - Europe again!!

[dj7mgq]

When I read:

> The hardware noise blanker is still only being tested at
> Elecraft and I don't have it yet.



it sounds to me like the the 31st of August may still be a bit too early for the
first shipments. At least we know Elecraft is doing what they need to do to make
this radio the best they can, and the crew in Aptos should take all the time
they need!

vy 73 de toby

PS: I will be in Montenegro during the second half of October - not sure which
call I'll be using.

-- 
DD5FZ

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[Elecraft] Re: Elecraft Digest, Vol 40, Issue 31

[Dixontribe]

Hi,
 Names Dave CALL G0AYD,HAVE K2 qrp version but  fully loaded,any of you 
guys suggest a mic at present am using it on cw but  would dearly like to try 
the quacky duck end of the band.Regards  Dave..



   
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[Elecraft] Antenna selection diagrams

[dj7mgq]

Hallo,

after taking a quick peek at the new diagrams (thank you Wayne!), I have two
short comments/questions:


1) "...image rejection will be best when sharing the main path..."

How much does the image rejection change when not routing through the
transmitter low passes? 

An image rejection of (worst case) 70dB could be better. However, knowing
Elecraft, the specification is likely to be conservative, so I would think that
the image and spurious rejection in the RX, especially where it counts, will be
better.


2) It looks as if the main RX, by default, can not be routed to the AuxRF jack.
Is this correct?


vy 73 de toby
-- 
DD5FZ
K2 #885 
K2/100 #3248 
K3/100 #??? (<200)



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[Elecraft] K2 mike question...

[Steve Kallal]

I just finished the KSB2 option for my K2. I wired P1 for the ICOM mikes. I
have a GM-4 Heil boom mike with an ICOM cable. I also have the HM-36 ICOM
mike. I was able to get the GM-4 to work without the 10k resistor. The HM-36
requires the resistor, which I haven't hooked up yet.
 
Can the Heil GM-4 work with the 10k hooked up from AF to 5V? If so it would
make my setup a little easier.
 
Another idea is to wire P1 for a Kenwood setup. I still have the Kenwood
cable for my GM-4 sitting around somewhere. That way I could use the Heil
mikes designed for the K2. Actually the Kenwood and Elecraft mikes are wire
almost identically. The only difference I see between the two, is the
resistor used for the Elecraft mikes. Since the Elecraft mikes are Heil
mike, I wonder if the GM-4 with the Kenwood cable would work with the
resistor included.
 
73,
 
Steve N6VL
 
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