Warning: Creating default object from empty value in /homepages/11/d132647312/htdocs/Amfone/mkportal/include/SMF/smf_out.php on line 47
Temco 75




 
The AM Forum
September 28, 2020, 01:35:48 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
 
   Home   Help Calendar Links Staff List Gallery Login Register  
Pages: [1]   Go Down
  Print  
Author Topic: Temco 75  (Read 1033 times)
0 Members and 1 Guest are viewing this topic.
Opcom
Patrick J. / KD5OEI
Contributing
Member
*
Offline Offline

Posts: 7624



WWW
« on: November 07, 2019, 03:07:23 PM »

Anyone know anything about this? Temco 75GA.. I might get to trade some stuff for it. Have not seen a diagram or manual online though.

correction - book at K4OZY site!
http://www.jptronics.org/OTHER/temco75ga.pdf


* temco 75GA 1.jpg (55.75 KB, 640x480 - viewed 201 times.)

* temco 75GA 4.jpg (54.43 KB, 640x480 - viewed 189 times.)
Logged

Radio Candelstein - Flagship Station of the NRK Radio Network.
KD1SH
Member

Offline Offline

Posts: 212



« Reply #1 on: November 08, 2019, 06:20:36 PM »

   That is one nice find - front panel looks amazingly sharp.  One hundred and forty pounds!  Looks like plenty of iron in the picture, and maybe an oil filled cap, too.  Book says TB35 final; my copy of "Tube Type Transmitters" (highly recommended) says it's an 814.  Power to the Pentode!
Logged
Opcom
Patrick J. / KD5OEI
Contributing
Member
*
Offline Offline

Posts: 7624



WWW
« Reply #2 on: November 08, 2019, 08:10:31 PM »

Yeah the 814 is in the "transmitters" 1930-1980 book and all, but the photo image shows a different tube, looks like the TB-35 or 3D23 called for in the manual. Could be a later version or something. Hopefully it's good. The gentleman said he would trade.

It runs the metal 6L6's kind of hard at idle but there should be no shortage of audio.

Modulator (AB2)
Plate 410V @ 200/225mA
Screen 310V
Grid 0V
Cathode 28V
=================
PA
Plate 1080V @ 120mA
Screen 310V
Grid -90V @ 20-30mA

It requires two C batteries so it would not be out of the question to think about that. Not much need to talk about mods but I'm kind of getting excited about it as an electrical restoration/longevity upgrade project. It has a VFO which is great and takes two crystals. Hope the iron is good. Unknown what shape it's in now except the appearance.


* temco 75GA 2.jpg (40.69 KB, 640x480 - viewed 129 times.)

* temco 75GA 3.jpg (107.64 KB, 1080x810 - viewed 120 times.)
Logged

Radio Candelstein - Flagship Station of the NRK Radio Network.
KD1SH
Member

Offline Offline

Posts: 212



« Reply #3 on: November 08, 2019, 08:35:57 PM »

   That's the kind of rig I'd see at a hamfest and think: way too much weight per watt, too heavy, too big, too much trouble - but then I'd buy it anyway 'cause it's these kinds of rigs that are what boat-anchor-fancying is all about.  It's in great shape, it's rare, and I'd kick myself a bruise all the way home if I didn't buy it.  Life's too short for plastic radios.  Wallow in the hollow!
Logged
Opcom
Patrick J. / KD5OEI
Contributing
Member
*
Offline Offline

Posts: 7624



WWW
« Reply #4 on: November 08, 2019, 11:22:36 PM »

Oh yeah! 520 Watts AC consumption on AM..
Logged

Radio Candelstein - Flagship Station of the NRK Radio Network.
Steve - K4HX
Administrator
Member

Offline Offline

Posts: 2692



« Reply #5 on: November 09, 2019, 01:17:31 PM »

Nice find. Temco was the premier transmitter producer during the 1930s. They made commercial grade rigs up the 1kW level. IMHO, more rare and valuable than Collins.
Logged
KE5YTV
Contributing
Member
*
Offline Offline

Posts: 335



« Reply #6 on: November 09, 2019, 11:15:31 PM »

It must have been designed by Thordarson. Shocked
Logged

Mike
KE5YTV  Dallas, TX
"The longest trip begins with a stop at the ATM."
Pages: [1]   Go Up
  Print  
 
Jump to:  

AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
 AMfone 2001-2015
Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
Page created in 0.046 seconds with 19 queries.