[BC] Can someone identify an old Collins 5?

[chuckg@chartermi.net]

20-T was 1940's, the next generation was the 21E/M.  They were somewhat
similar to the 20T in appearance, but not exactly the same.  IIRC the 21E/M
was 3 cabinets,
Driver on the left, power supply in the center and output/mod to the right. 
Was this a DA?  It was common to build the phasing equip in cabinets that
matched the transmitter. 




Chuck G.



Original Message:
-----------------
From: Mark Durenberger Mark4 at durenberger.com
Date: Sun, 6 Aug 2006 16:33:39 -0500
To: broadcast at radiolists.net
Subject: Re: [BC] Can someone identify an old Collins 5?


Are you SURE that wasn't an RCA BTA-5?

Mark Durenberger


----- Original Message ----- 
From: "Reader" <reader at oldradio.com>
To: <broadcast at radiolists.net>
Sent: Sunday, August 06, 2006 1:12 PM
Subject: [BC] Can someone identify an old Collins 5?


> Hello, Barry.
> 
> Perhaps you could help me on a question:  Back in the early '70s, I 
> worked at a station that had two Collins transmitters.  The standby 
> transmitter was the model 20T, which you have a picture of in your 
> Collins section.  Next to it was the 5/10kW version, which looked 
> exactly like the 1kW, but was built in 4 cabinets, and used 892R mods 
> & finals, and 8008 rectifiers.  All of the tubes were visible through 
> those big cabinet windows, and the rectifiers cast a glow in the room 
> that pulsated with modulation.  It was a very impressive 
> installation, especially for a youngster, just getting into the business.
> 
> Since then, I have not been able to find any reference to that 5kW 
> transmitter, either pictures of even the model number.  Do you have 
> any idea what it was?
> 
> Thanks for the resource.  I've enjoyed looking through the transmitters.
> 
> 
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