http://tinyurl.com/5hkot4

Hmmmm....used to have one of those.

Bit of nostalgia...

"Tom Francis - SWSports" wrote in
message ...
http://tinyurl.com/5hkot4

Hmmmm....used to have one of those.

Bit of nostalgia...

My first, circa 1955

http://oak.cats.ohiou.edu/~postr/bapix/S20R.html

"D.Duck" wrote in message
...

"Tom Francis - SWSports" wrote in
message ...
http://tinyurl.com/5hkot4

Hmmmm....used to have one of those.

Bit of nostalgia...

My first, circa 1955

http://oak.cats.ohiou.edu/~postr/bapix/S20R.html



Here's the one I used to play with:

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

Eisboch

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?


Eisboch

"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?


Eisboch


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

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


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.

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

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. :)

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?


Eisboch


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

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


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.

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


You MARS guys were life-savers during the Vietnam days.

Thanks for what you did!
--
A Harry Krause truism:

"It's not a *baby* kicking, beautiful bride, it's just a fetus!"

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

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.

One of the hams here in town has a rhombic of similar size. The
largest/longest antenna for me was a bi-directional sloped Beverage
that ran NE/SW for a little over a mile through the woods. The ends
were terminated at six foot high on both ends and the mid-slope was at
12 feet. I used it during my contesting days as a spotting antenna,
but I could switch it to transmit quickly.

That antenna was freakin' loud man.

On Thu, 6 Nov 2008 17:20:10 -0500, "Eisboch" wrote:

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

You got it right. " Peak the grid, dip the plate, keep the fire in the
wire". :)

Being a moron, I used to mix that up all the time. Had a few thermal
runaways in the finals which my Dad was never too pleased about. :)

On Thu, 6 Nov 2008 17:04:10 -0500, "Eisboch" wrote:


"D.Duck" wrote in message
...

"Tom Francis - SWSports" wrote in
message ...
http://tinyurl.com/5hkot4

Hmmmm....used to have one of those.

Bit of nostalgia...

My first, circa 1955

http://oak.cats.ohiou.edu/~postr/bapix/S20R.html

Here's the one I used to play with:

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

Got to play with the exciter of one once when I worked some MARS phone
patches back in the day. I couldn't talk the Chief into letting me
fire up the finals on the big guns though. :)

I did get to play with an Air Force station at full power once though
- blasted a signal right below the lower end of the 20 meter ham band
on a phone patch to the East Coast - MARS again.

That was cool. :)

Man, we could get away with some stuff back then on MARS.