On Thu, 6 Nov 2008 18:24:24 -0500, "D.Duck" wrote:


"Eisboch" wrote in message
...


Here's the one I used to play with:

http://www.geocities.com/technician4/ronw1.jpg

Eisboch


The one in the link (above) is an old AN/FRT-40 used by the Navy
primarily at shore based naval transmitter sites from late 40's. They
were phased out by the mid 70's.

The "40" was a 50kw version of this, an An/FRT-39. It was used both at
shore stations and aboard ship.

The left side rack contained the modulation mode select (CW, FSK, Voice,
and the output mode .... carrier or SSB. It had an "exciter" capable of
1000 watts used to drive the right hand side, 10kw power amp. The exciter
could also be used by itself, hooked to an antenna in emergencies. We
used to have a lot of fun screwing around with that.

http://jproc.ca/rrp/coverdale_gpt10k.gif

A FRT-40 added an additional power output section to raise the output to
50KW

I can't remember anymore. Is it "peak the grid, dip the plate" or the
other way around?

Here's one I used at the Marine MARS station on Okinawa fro RTTY traffic..

http://www.collinsradio.org/html/kw-1.html

That was a sweet rig back in the day. Never really got into RTTY for
some reason - when I was still up on code, I could "read" 60 Baudot
RTTY by ear - could catch enough to parse the word pretty well.

Then again, my CW speed was up around 65 wpm with 100% copy. I was
just listening to the high speed cw net on 75 - I can still copy 40
wpm pretty well, but I've lost my 50+ speed ear - have to keep
listening for a few days to get it back.

A lot of that is machine code now done by computer - not a lot of us
left who enjoy high speed full breakin code using a Vibrolplex bug. I
use my Dad's presentation bug - he was given it by the radio guys on
his DE during WWII.

Love that thing.

We also had several Collins original *S* Line setups. We had a 600' per leg
rhombic pointed at Southern California, Camp Pendleton. They were are main
outlet for RTTY traffic.

My Dad's S-line is a great system - looks great too.

Nothing like tubes.

BTW, don't peak the plate, you'll be replacing finals. 8)

Been there, done that.

Much to my Dad's displeasure. :)