[BC] Re: Join us on AM

[VJB]

>Ah yes, the joys of working 40 phone with my home
brew >pair of 250 TH's 
>that I got out of an old surplus BC610.

Chuck did you save any snapshots?  
The big sister to the 250T series was the 450, shown
here. Clearly good looking, no matter big or small.

http://wa3vjb.amham.com/pics/450TH.jpg

There was also a 750T but that entire Eimac "T" series
had mechanically brittle filaments and few survive. A
friend of mine, W2INR, converted a Collins 21E over to
a pair of 450TL modulating another pair. Excellent
sound:

http://wa3vjb.amham.com/sound/INR-HamBadge.mp3

Anyway Chuck, thanks for the comment. In 1976 I
acquired an unfinished homebrew transmitter project
that had been started in 1953 out of the "West Coast
Radio Handbook" as the Editors and Engineers book was
known.  

Pair of 810 triodes modulating a pair of 4-250A. 
Final tank is the plug-in coil like the BC-610, but
the "jumbo" type with the swinging-link. I had a lot
of help, but completed it over Christmas break in
1977. 

The transmitter is now in its 30th year on the
shortwave ham bands, most recently in service on 10M
for Solar Cycle 23. The hobbyist "AM revival" was in
full swing across Europe, the UK and th South Pacific
according to all the activity between 29.000 -
29.200Mc

Scott -- to your question about how many Collins 300-G
are now known, it's more than two dozen, either
privately held or still tucked in the transmitter room
at stations across the country. It was a far more
popular transmitter than I ever imagined when I got my
first one in 1992.

I was trying to look a bit more charitably at Ron's
rather snide comment about AM on HF, and was surprised
to see his website indicates significant interest in
CW. The surprise came when I saw he's a Technician
Class license. 

The point of my original posting was to invite folks
just like him to join us on AM, on HF, now that the
FCC has discontinued the license testing element for
Morse Code. In his case, it apparently would not have
been the barrier other folks have mentioned. So who
knows.

Ron, if you want company in bad feelings about
incompatible modes trying to share the same frequency,
I submit this sound file from 40 meters.

http://wa3vjb.amham.com/sound/40mNite.mp3

73

Paul/VJB


 
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