Hi,
Forwarded a 2009 email exchange for your info. I have NOT tried this so
use with care and at your own risk.
Regards,
Mike VP8NO
-------- Forwarded Message --------
Subject: AW: [Elecraft] K3 KPA3 bias adjust
Date: Sat, 3 Jan 2009 19:46:55 +0100
From: Koppendorfer Klaus <[email protected]>
To: Jan Erik Holm <[email protected]>
CC: [email protected] <[email protected]>
Locate the BIAS pot at the front of the KPA3, between the heat sink and
the KPA3 shield. Note what the display current is in the VFO B readout
when you tap the Display button and turn the VFO B knob to the current
readout. In RX, it should be 1.0A or so. In XMIT (not TUNE), it should
be about 1.90 to 2.0A when the Power knob is set to 12w or above so the
KPA3 is made active (but there is no RF output since XMIT is used). Or
you can press the PTT button but do not speak.
If there is much more current than this, set the BIAS pot to minimum
(fully counter clockwise). Then tap XMIT (not TUNE) and note what the
current is in VFO B's readout. Slowly turn up the BIAS pot until you see
400-500mA more current that was seen with the BIAS pot at minimum.
73
OE6KYG
KX1 244
K2 1331
K3 115
-----Ursprüngliche Nachricht-----
Von: [email protected] [mailto:elecraft-
[email protected]] Im Auftrag von Jan Erik Holm
Gesendet: Samstag, 03. Jänner 2009 19:35
Cc: [email protected]
Betreff: Re: [Elecraft] K3 KPA3 bias adjust
Thanks Ron but I knew this already.
Probably have to write to K3support and ask,
however I´m very surprised nobody could answer
on the reflector.
Jim SM2EKM
----------------------
Ron D'Eau Claire wrote:
> Hello Jim:
>
> That pot, along with all the other trimmers in the K3, is adjusted at
the
> factory. There are specific cautions against touching any of them in the
> field; all field adjustments are done in firmware.
>
> If you have a problem with the KPA3, suggest you post a message to
> [email protected]. If an adjustment is needed that can be done in
the
> field, one of the fellows there can give you specifics.
>
> Ron AC7AC
>
>
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Jan Erik Holm
> Sent: Saturday, January 03, 2009 6:55 AM
> To: [email protected]
> Subject: [Elecraft] K3 KPA3 bias adjust
>
> I find nothing about it in any manual. R11 on KPA3
> I guess. What are the specifications for the bias
> adjust?
>
> 73 Jim SM2EKM
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
