[Milsurplus] 800 cycle transmitters

[Ray Fantini]

Wonder if the TDE was inspired by the TBW? Both have the same split system design with one third for LF, one third for HF and a power supply modulator section common to both. The 5U4 in the bias supply would be a giveaway if I thought about it being that's a more modern tube then anything in the TBW design.
Also have to wonder about how fast the TBW generator ran? Being most 60 cycle generators chug along at 1,800 or 3,600 RPM would think the 800 cycle requirement had a real high motor speed requirement to go with it.

Ray F/KA3EKH


From: milsurplus-bounces at mailman.qth.net [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of WA5CAB--- via Milsurplus
Sent: Friday, November 17, 2017 2:49 AM
To: milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] 800 cycle transmitters

No.  The first TBW was built in 1940.  The first TDE didn't come out until 1942.  However, they were both built by Westinghouse.

The GO, which is the set most like the TBW, was first built by Hygrade Sylvania in 1933.  However, Westinghouse did build the GO-3 and the 7, 8 and 9, the latter three all in 1940.

They also built the GP-3 through GP-7 (another 800 cps set)   But it was originally designed by RCA in 1937.

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480

In a message dated 11/16/2017 21:10:11 PM Central Standard Time, ka2ivy at verizon.net<mailto:ka2ivy at verizon.net> writes:


On 11/16/2017 03:19 PM, Ray Fantini wrote: (in part)


Going to make another assumption that the TBW was a striped and light weight version of the shipboard TDE transmitter, similar design around an 803 tube and suppressor modulation but the TDE used a huge motor generator or 60 cycle AC power supply. Would be curious to know what came first? I am thinking TDE and then TBW.



Ray F/KA3EKH

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