Snowy,
I am glad to hear that it is now working for you. It sounds like you
had a soldering problem somewhere.
A surplus of solder usually means that the lead and solder pad were not
heated sufficiently.
If you have other areas where you find excess solder, just reheat and if
necessary, wick away the excess - you may have a fully functional K2
sooner than you think.
It sounds as though some (or perhaps all) of the K2 A to B mods were
installed in an attempt to get it working.
Which of the group of mods is installed is important to keeping track of
the level of the K2.
You may want to download the K2ATOB instructions and all the other mod
instructions to do a physical check of the installed components.
Knowing the level of mods installed is important when chasing problems.
Make a log of the A to B mods installed for future reference. The
level of the IF crystals on the RF board and the KSB2 option is also
important to having a good filter response - those crystals should be
marked with a "-S" suffix.K2s above SN 2560 have the new crystals.
If the wiring mod for the sidetone source with firmware 2.04 has not
been installed, do it. It is required for the
KIO2 or the KPA100 (see the instructions for those options) . If you
have MCU 2.04r firmware it is mandatory - you will not have sidetone
without it. If your firmware is 2.04P or earlier set the menu sidetone
to U4-8.
73 - Merry Christmas and Happy New Year,
Don W3FPR
On 12/19/2021 5:36 PM, snowy howell via Elecraft wrote:
Good Evening Don Sorry for the late reply, not used to the format of > the reflector and stumbled onto your suggestions to solve my BFO >
problem. I am please to say that I have now got it working > correctly.
Getting nowhere with the test I decided to dismantle the > radio down to
just the RF board, removed a surplus of solder from the > D36/37 area,
re-flowed the pins of U10, lifted the leg of the 5.1meg > resistor and
L33, didn’t know about the rubber bung being conductive > however once
again removed a surplus of solder from that area, I also > added a small
cut of insulation tape to form a bed for the resistor > on L33, thinking
that turns may be shorted, at this point I ought to > explain I
purchased this as a built but non worker, it is an early > radio as it
has a Rev A mother-board with a small pot for R60 and an > early control
board with the 12v switch rather than the berg > connectors, I have
built 5 or 6 of these for people and never had a > problem certainly not
as many faults as this one appears to have had, > there is no serial
number on the radio, but it has had the PLL > thermistor conversion as
well as the D36 done. Have to thank Dave for > sticking with me on this
one, without his guidance I would still be > trying to sort the PLL
problem. > > Have a good Christmas and New Year 2022 > > 73 > > Snowy
G0HZE > > Sent from Mail for Windows > >
______________________________________________________________ >
Elecraft mailing list Home: >
http://mailman.qth.net/mailman/listinfo/elecraft Help: >
http://mailman.qth.net/mmfaq.htm Post: > mailto:Elecraft@mailman.qth.net
> > This list hosted by: http://www.qsl.net Please help support this >
email list: http://www.qsl.net/donate.html Message delivered to >
d...@w3fpr.com
ere
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com
