EMRFD Message Archive 14442
Message Date From Subject 14442 2017-11-17 21:52:31 skipp025 ICM OX Modules - Invformation available on line? Hello to the Group,
ICM (International Crystal - RIP) many decades in the past, offered a
series of about six (6) "OX" Experimenter Modules, in kit-form for sale.
There was an oscillator, mixer, RF amp, broad-band amp and a small
signal RF power amp come to mind.
You can see the advertisement for these small board kits in many of
the 1970's era QST Magazines.
Are the instruction sheets for those modules available anywhere on
the web/internet for general experimenting or repair/work with an
Thank you in advance for your replies.
skipp025 at yahoo dot com
14443 2017-11-17 22:44:10 chuck adams Re: ICM OX Modules - Invformation available on line? In several of the volumes "Encyclopedia of Electronic Circuits"
by Graf there are some of the schematics. There are 6 volumes,
but the index in each volume also references the other volumes.
I used one of the crystal oscillator modules barefoot on 40m
one winter night to work from College Station, TX to Fargo, ND
with a long wire. Using a Drake 2B for the receiver. Good times.
I figure about 20-30mW out and don't ask about the harmonics.
14444 2017-11-18 09:20:50 Mike Czuhajewski Re: ICM OX Modules - Invformation available on line? I have the "manual" for the OX oscillator and will be sending him a
scan in a day or two.
14445 2017-11-18 10:22:31 Gary Winblad Re: ICM OX Modules - Invformation available on line? There is a QST article from July 1967 that uses three of the modules.
The schematics look like they are right out of the period ARRL Handbook
"A Transceiving Converter For Less Than $30" By W2MJI
14446 2017-11-20 20:54:07 skipp025 Re: ICM OX Modules - Invformation available on line? >> ICM OX Modules - Invformation available on line?Hello back,
> There is a QST article from July 1967 that uses three of the
> modules. The schematics look like they are right out of the
> period ARRL Handbook to me.
> See article:
> "A Transceiving Converter For Less Than $30" By W2MJI
> 73, Gary WB6OGD
Thank you Gary and especially to Mike for sending me a PDF of
the OX oscillator module he actually has one of.
Being an ARRL Member, I found the above article in their archives
and obtained it for review.
Until this time, I didn't realize ICM initially offered the OX modules in
a vacuum tube format. The actual kit modules I was looking for documentation
about are small solid state boards. In a brief series of web searching, I
found a 1972 ICM Catalog showing they solid state modules as being
available at that time... selling prices were really cheap in today's money,
but again that was 1972.
I'm interested in some minor experiments with colpitts oscillators and
even playing around with some of these small ICM solid state modules if
I can find/buy one/them or just locate the diagrams and reproduce my
Just looking back at the tube versions... they mentioned article reminds
me a lot of the vacuum tube Ameco brand receiving converters, preamplifiers
and power supply modules... of which I've also done a little review. I am also
a fan of Hamtronics kit receiving converters... they are a lot of fun to play
with. If you really want to go obscure... even some of the 1970's vintage
"Tunaverters" using your AM car radio as the back end of the receiver.
So, again thank you and I'm still looking for more of the original ICM
OX kit module information... there are/were 5 or 6 different boards offered.
skipp025 at yahoo dot com