[Heathkit] HW-18-2

[Rod Hogg]

Michael,

The HW-18-2 was primarily used for CAP operations.  Many, many were built
and used for that purpose.  It is basically an HW-12 with modifications,
being it is crystal controlled, has fixed PA tuning and lack of other
features and a built in speaker and microphone is hardwired.  Runs 200W PEP,
and was designed to operate on the CAP freqs 4467.5 to 4627.0Khz.  It could
probably be used on 75M with some padding or moved up to 60M.  It is USB
only and carrier controlled AM on one sideband, with about 20 watts of
power.

Biggest problem we had was they would blow the TR diodes with high SWR.

One could probably couple a VFO to them and get away from crystal control.
The IF is 3395Khz.  IF + Channel frequency = injection frequency.

It used the HP-23 AC power supply or an equivalent, or the HP-13 DC supply. 

We had probably a dozen or so around here on CAP until the Air Force made
them obsolete.  Originally they had a trimmer on the crystal for netting
(Clarifier) but AF made them remove that feature, then they had to move on
to more modern radios, which didn't improve anything much.

CAP sort of dropped out of limelight around here.

I have, I guess, one of the "rare" manuals for the HW-18.  I built up 8 of
them from kits for the CAP back in early 70s, but only got to keep one
manual.....

Rod
KØEQH


-----Original Message-----
From: heathkit-bounces at mailman.qth.net
[mailto:heathkit-bounces at mailman.qth.net] On Behalf Of Michael Tauson
Sent: Wednesday, November 18, 2009 4:27 PM
To: boatanchors at lists.tempe.gov; boatanchors at mailman.qth.net;
glowbugs at piobaire.mines.uidaho.edu; heathkit at mailman.qth.net
Subject: [Heathkit] HW-18-2

An HW-18-2 landed on my doorstep and, after a rather extensive scan of
the web, I've come up with little useful information.  All I know is
that it was built for MARS use just above 80m, and that it's good for
something like 200w on SSB.

The lack of info is not good.  I'd like to know more about it (other
than the several disparaging comments about it being a waste of time
that showed up one site) so I can make it into a useful member of
society.  "Beggars can't be choosers" applies here and this is what I
have to work with.

Any assistance - schematics, manuals, suggestions, power supplies et
al would be greatly appreciated.

Mahalo.

Best regards,

Michael, WH7HG
-- 
http://www.nationalmssociety.org/chapters/NTH/index.aspx
http://wh7hg.blogspot.com/
http://kludges-other-blog.blogspot.com
Hiki Nô!
______________________________________________________________
Heathkit mailing list
Home: http://mailman.qth.net/mailman/listinfo/heathkit
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Heathkit at mailman.qth.net

List Administrator: Duane Fischer, W8DBF
** For Assistance: dfischer at usol.com ** 


This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html