[Elecraft] PCB Cleaning

[Harold Howells]

Is it necessary to clean the K2 circuit boards, say with alcohol, before 
soldering?

Harold Howells
hhowe...@intrq.com




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[Elecraft] PCB Cleaning - followup

[Harold Howells]

I may have answered my own question by going back through the first part of the 
manual.  It emphatically says to not use any solvents at risk of voiding the 
warranty,  I have read before though that cold solder joints can result from 
dirty circuit boards.  Any thoughts?  Thanks.   HH
 

Harold Howells
hhowe...@intrq.com




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Re: [Elecraft] K3/100 TX problem on 20m

[Michael Carter via Elecraft]

Hi Paul,

Could you please post the TX gain parameters
recorded by the K3 Utility at the 50 watt level
for all bands?

If there is a significant difference in those gain
parameter values between adjacent bands (say
30 and 17 meters) and the value on the 20
meter band, that may be an additional clue.

The bandpass filter bank may be at issue here
since you've checked the appropriate LPF.
If there's a problem with the relay contacts
on the relevant BPF or LPF section, that may
also reduce the TX signal level and force
an elevated TX Gain parameter value for that
band.

Keith, WE6R has a checklist of steps to
try when diagnosing low TX output power.
I recall he said to contact supp...@elecraft.com
for that document.

73,
Mike, K8CN
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[Elecraft] [WTB] KXPD3_KX3

[Petr Ourednik]

Hi folks,

I'm thinking about the KXPD3_KX3 for my KX3 radio for fair price please. 
Best from EU due to high import fee from outside EU.
Thanks for offers if any...

73 - Petr, OK1RP
http://ok1rp.blogspot.com
K3 #0778 | K2 # 4800 | K1 #1031 | KX3 # 0602
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[Elecraft] AX1 40 meter coil with KH1

[William Combs via Elecraft]

I was wondering if the 40 meter coil from the AX1 could be used with the KH1. 
Don’t know if it would connect to the KH1. But now with the new right angle 
connector (not yet released), it would seen more likely to be a possibility. Or 
not?

Bill
W8BC



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Re: [Elecraft] K3/100 TX problem on 20m

[dyno lab]

Do the TX gain parameter numbers have meaning such as dB or are they just 
relative numbers ?

73,
Hal
W7YNC


> On 03/05/2024 6:35 AM PST Michael Carter via Elecraft 
>  wrote:
> 
>  
> Hi Paul,
> 
> Could you please post the TX gain parameters
> recorded by the K3 Utility at the 50 watt level
> for all bands?
> 
> If there is a significant difference in those gain
> parameter values between adjacent bands (say
> 30 and 17 meters) and the value on the 20
> meter band, that may be an additional clue.
> 
> The bandpass filter bank may be at issue here
> since you've checked the appropriate LPF.
> If there's a problem with the relay contacts
> on the relevant BPF or LPF section, that may
> also reduce the TX signal level and force
> an elevated TX Gain parameter value for that
> band.
> 
> Keith, WE6R has a checklist of steps to
> try when diagnosing low TX output power.
> I recall he said to contact supp...@elecraft.com
> for that document.
> 
> 73,
> Mike, K8CN
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Re: [Elecraft] K3/100 TX problem on 20m

[Michael Carter via Elecraft]

Hi Hal,

The numbers themselves have meaning to the
DACs inside the K3, but in terms of actual
units I don't know.  The key thing is that as
those values are increased, the drive levels
from the TX DACs are increased, though I
don't know if the relationship is a linear one.

The gains of the LPA and PA stage transistors
fall off at higher frequencies, so one might
expect TX Gain parameters on those bands
to be somewhat higher than on the low bands.
However, if two immediately adjacent bands
have very different TX gain parameter values,
the likelihood is that something is amiss
in one of the filters (either BPF or LPF) and
the associated relays that select the filters.

73,
Mike, K8CN

From: dyno lab 
Sent: Tuesday, March 5, 2024 11:19 AM
To: Michael Carter ; Michael Carter via Elecraft 

Subject: Re: [Elecraft] K3/100 TX problem on 20m

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Do the TX gain parameter numbers have meaning such as dB or are they just 
relative numbers ?

73,
Hal
W7YNC


> On 03/05/2024 6:35 AM PST Michael Carter via Elecraft 
>  wrote:
>
>
> Hi Paul,
>
> Could you please post the TX gain parameters
> recorded by the K3 Utility at the 50 watt level
> for all bands?
>
> If there is a significant difference in those gain
> parameter values between adjacent bands (say
> 30 and 17 meters) and the value on the 20
> meter band, that may be an additional clue.
>
> The bandpass filter bank may be at issue here
> since you've checked the appropriate LPF.
> If there's a problem with the relay contacts
> on the relevant BPF or LPF section, that may
> also reduce the TX signal level and force
> an elevated TX Gain parameter value for that
> band.
>
> Keith, WE6R has a checklist of steps to
> try when diagnosing low TX output power.
> I recall he said to contact supp...@elecraft.com
> for that document.
>
> 73,
> Mike, K8CN
> __
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Re: [Elecraft] AX1 40 meter coil with KH1

[David Thompson via Elecraft]

On 3/5/2024 9:28 AM, William Combs via Elecraft wrote:


I was wondering if the 40 meter coil from the AX1 could be used with
the KH1.


Howdy William...

I use the AXE with the KH1 for 40m with the 32ft counterpoise from the 
AXE kit. I am able to get a good enough match to operate on 40m and have 
made POTA contacts with that setup.


When I move to the higher bands, I just leave the long counterpoise 
connected. The KH1 doesn't mind and matches the higher bands fine.


I have not kept notes on my matched SWR readings, but I should. I'm 
usually wanting to get the activation moving and get it done. Maybe I 
should just take the little rig out in the front yard and play a little. ;)


73 de AG7TX

--
David Thompson, AG7TX

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[Elecraft] K3/100 TX problem on 20m

[Paul Kent]

My K3/100 gives a high DC current warning when transmitting on 20m with power 
settings above 75 watts. Maximum output is about 80 watts and is unstable. All 
other bands perform normally with full 100w output and normal current draw. (50 
ohm dummy load) I have done the TX gain and wattmeter calibrations, finding no 
issues and with no change in symptoms. The output LPF is shared with 30m and I 
replaced all the capacitors in that circuit, also with no change in symptoms. 
Any ideas on what may be causing this problem?
Paul, K0PK
Sent from Mail for Windows

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Re: [Elecraft] PCB Cleaning - followup

[Michael Carter via Elecraft]

Hi Harold,

It's certainly true that cold solder joints
can arise from dirty/corroded PCB solder
lands.  The Elecraft boards in my K2/10 (now
17 years old, built by me) are very good
quality with plated-through holes and
durable solder mask.  I had occasion
to open my K2 to install the SSB and noise
blanker modules last week, and the boards
look as new as they did 17 years ago.  I
had more trepidation about the rework
and removal of some components than
I ever did at the initial construction.

If you've not had much soldering practice
recently, I suggest doing some practice
soldering of wires and trimmed component
leads to re-acquire your skill.  It will come
back..

73,
Mike, K8CN
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[Elecraft] Happy Birthday to the K2!

[Jan]

Hi All K2 transceiver fans

Built in July, 1999  is my K2/at transceiver # 136 operational on CW & 
SSB @ 10 watts


I also have a gray shirt from Elecraft, with K2 # 136 by K1ND 
embroidered on it


IT complements my K4/at  # 0200 very well

Cheers to all the K2 "builders"

from Jan, K1ND



--
This email has been checked for viruses by AVG antivirus software.
www.avg.com
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Re: [Elecraft] PCB Cleaning - followup

[David Gilbert]

Cold solder joints might be caused by a dirty solder PC board BEFORE the 
soldering was done, but I can't think of a single reason why a good 
solder joint would turn into a cold one from crud on the board.  I would 
be curious where you read that myth.


Dave   AB7E


On 3/5/2024 3:33 AM, Harold Howells wrote:

I may have answered my own question by going back through the first part of the 
manual.  It emphatically says to not use any solvents at risk of voiding the 
warranty,  I have read before though that cold solder joints can result from 
dirty circuit boards.  Any thoughts?  Thanks.   HH
  


Harold Howells
hhowe...@intrq.com




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Re: [Elecraft] AX1 40 meter coil with KH1

[Bill Johnson]

>From what I have read, the coil is usable with an external antenna not the KH1 
>antenna.

Bill
K9YEQ

From: elecraft-boun...@mailman.qth.net  on 
behalf of David Thompson via Elecraft 
Sent: Tuesday, March 5, 2024 9:26:58 AM
To: elecraft@mailman.qth.net 
Subject: Re: [Elecraft] AX1 40 meter coil with KH1

On 3/5/2024 9:28 AM, William Combs via Elecraft wrote:

> I was wondering if the 40 meter coil from the AX1 could be used with
> the KH1.

Howdy William...

I use the AXE with the KH1 for 40m with the 32ft counterpoise from the
AXE kit. I am able to get a good enough match to operate on 40m and have
made POTA contacts with that setup.

When I move to the higher bands, I just leave the long counterpoise
connected. The KH1 doesn't mind and matches the higher bands fine.

I have not kept notes on my matched SWR readings, but I should. I'm
usually wanting to get the activation moving and get it done. Maybe I
should just take the little rig out in the front yard and play a little. ;)

73 de AG7TX

--
David Thompson, AG7TX

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[Elecraft] No cursing necessary

[Harold Howells]

I certainly did not mean to cause offense.  I’ll just listen for now.   HH

Harold Howells
hhowe...@intrq.com




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Re: [Elecraft] K3/100 TX problem on 20m

[Masadaman via Elecraft]

This thread sucks...

Yahoo Mail: Search, Organize, Conquer 
 
  On Tue, Mar 5, 2024 at 11:29 AM, Michael Carter via 
Elecraft wrote:   Hi Hal,

The numbers themselves have meaning to the
DACs inside the K3, but in terms of actual
units I don't know.  The key thing is that as
those values are increased, the drive levels
from the TX DACs are increased, though I
don't know if the relationship is a linear one.

The gains of the LPA and PA stage transistors
fall off at higher frequencies, so one might
expect TX Gain parameters on those bands
to be somewhat higher than on the low bands.
However, if two immediately adjacent bands
have very different TX gain parameter values,
the likelihood is that something is amiss
in one of the filters (either BPF or LPF) and
the associated relays that select the filters.

73,
Mike, K8CN

From: dyno lab 
Sent: Tuesday, March 5, 2024 11:19 AM
To: Michael Carter ; Michael Carter via Elecraft 

Subject: Re: [Elecraft] K3/100 TX problem on 20m

[You don't often get email from dyno...@comcast.net. Learn why this is 
important at https://aka.ms/LearnAboutSenderIdentification ]

CAUTION: This email originated from outside of the University System. Do not 
click links or open attachments unless you recognize the sender and know the 
content is safe.


Do the TX gain parameter numbers have meaning such as dB or are they just 
relative numbers ?

73,
Hal
W7YNC


> On 03/05/2024 6:35 AM PST Michael Carter via Elecraft 
>  wrote:
>
>
> Hi Paul,
>
> Could you please post the TX gain parameters
> recorded by the K3 Utility at the 50 watt level
> for all bands?
>
> If there is a significant difference in those gain
> parameter values between adjacent bands (say
> 30 and 17 meters) and the value on the 20
> meter band, that may be an additional clue.
>
> The bandpass filter bank may be at issue here
> since you've checked the appropriate LPF.
> If there's a problem with the relay contacts
> on the relevant BPF or LPF section, that may
> also reduce the TX signal level and force
> an elevated TX Gain parameter value for that
> band.
>
> Keith, WE6R has a checklist of steps to
> try when diagnosing low TX output power.
> I recall he said to contact supp...@elecraft.com
> for that document.
>
> 73,
> Mike, K8CN
> __
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Re: [Elecraft] PCB Cleaning - followup

[Mike Dodd]

On 3/5/2024 6:48 PM, Masadaman via Elecraft wrote:

Unsubscribe me


Unsubscribe yourself. Go to . Click "Directory 
of Lists. Scroll down to Elecraft, and click that name. Scroll down to 
"Elecraft Subscribers."


Then look for "To unsubscribe from Elecraft, get a password reminder, or 
change your subscription options enter your subscription email address:"


Enter your email address and click the "Unsubscribe or edit options" button.

Please.

--- Mike N4CF



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Re: [Elecraft] PCB Cleaning - followup

[Masadaman via Elecraft]

Take me off this threadfuck!

Yahoo Mail: Search, Organize, Conquer 
 
  On Tue, Mar 5, 2024 at 12:48 PM, David Gilbert wrote:   
Cold solder joints might be caused by a dirty solder PC board BEFORE the 
soldering was done, but I can't think of a single reason why a good 
solder joint would turn into a cold one from crud on the board.  I would 
be curious where you read that myth.

Dave   AB7E


On 3/5/2024 3:33 AM, Harold Howells wrote:
> I may have answered my own question by going back through the first part of 
> the manual.  It emphatically says to not use any solvents at risk of voiding 
> the warranty,  I have read before though that cold solder joints can result 
> from dirty circuit boards.  Any thoughts?  Thanks.  HH
>  
>
> Harold Howells
> hhowe...@intrq.com
>
>
>
>
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Re: [Elecraft] PCB Cleaning - followup

[Masadaman via Elecraft]

Fuck Fuck Fuck...remove me

Yahoo Mail: Search, Organize, Conquer 
 
  On Tue, Mar 5, 2024 at 5:36 AM, Harold Howells wrote:   I 
may have answered my own question by going back through the first part of the 
manual.  It emphatically says to not use any solvents at risk of voiding the 
warranty,  I have read before though that cold solder joints can result from 
dirty circuit boards.  Any thoughts?  Thanks.  HH
 

Harold Howells
hhowe...@intrq.com




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Re: [Elecraft] K3/100 TX problem on 20m

[Masadaman via Elecraft]

I don't want to be here

Yahoo Mail: Search, Organize, Conquer 
 
  On Tue, Mar 5, 2024 at 9:15 AM, Paul Kent wrote:   
My K3/100 gives a high DC current warning when transmitting on 20m with power 
settings above 75 watts. Maximum output is about 80 watts and is unstable. All 
other bands perform normally with full 100w output and normal current draw. (50 
ohm dummy load) I have done the TX gain and wattmeter calibrations, finding no 
issues and with no change in symptoms. The output LPF is shared with 30m and I 
replaced all the capacitors in that circuit, also with no change in symptoms. 
Any ideas on what may be causing this problem?
Paul, K0PK
Sent from Mail for Windows

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Re: [Elecraft] PCB Cleaning - followup

[Masadaman via Elecraft]

Unsubscribe me I don't know what my f** password is

Yahoo Mail: Search, Organize, Conquer 
 
  On Tue, Mar 5, 2024 at 6:45 PM, Masadaman via 
Elecraft wrote:   Fuck Fuck Fuck...remove me

Yahoo Mail: Search, Organize, Conquer 
 
  On Tue, Mar 5, 2024 at 5:36 AM, Harold Howells wrote:  I 
may have answered my own question by going back through the first part of the 
manual.  It emphatically says to not use any solvents at risk of voiding the 
warranty,  I have read before though that cold solder joints can result from 
dirty circuit boards.  Any thoughts?  Thanks.  HH
 

Harold Howells
hhowe...@intrq.com




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[Elecraft] KH1 -

[JCG]

The KH1 seems to fulfil my need of a 40 to 15M CW QRP rig with SSB and 
AM reception capability. I'm currently studying the manuals issued by 
Elecraft and have a first question: did an OM or YL use the KH1 
Programmer's Reference to precisely set the KH1 to his needs, using for 
exemple a Putty terminal emulator? I plan to use it in Thailand and I 
need to precisely set band edges (7.0 to 7.2 - 10.1 to 10.15 - 14.0 to 
14.35 - 18.068 to 18.168 and 21.0 to 21.45) outside of which TX must be 
blocked. According to the Programmer's Reference manual (page 6 - 
TXL/TXH (Transmit Limits; GET only) FORMAT: TXLn; or TXHn; where “L” 
returns lower limit, “H” returns upper limit,
and  is 0..4 for 40..15 meters. Reponse: TXLnF; where F is 
limit in kHz.) this seems to be possible. Did a member already use this 
remote setting procedure?

73 - Pierre - FK8IH
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