[Milsurplus] TBK>TBM modulator unit ?

[WA5CAB at cs.com]

The manual for the 50194 Modulation Equipment, which includes the 50193 
Modulator, and which I unfortunately do not have, is NAVSHIPS 900,778.

In a message dated 10/19/2017 11:16:27 AM Central Daylight Time, 
milsurplus at mailman.qth.net writes: 
> An RCA made CRV-50193 modulator followed me home. I am looking for manual 
> or schematic. There seems to be conflicting info on the internet. 
> Apparently the CRV-50193 &associated speech amp were used with a TBK transmitter 
> therefore making it a TBM. Or, am I just confusing the info? The RCA 
> modulator and the Westinghouse modulator look nothing alike.
> 
> 
> Here's what Navships 900,109   has to say:
> 
> 
> CRV-50193 MODULATOR UNIT
> CLASS "B" M0DULATOR. OUTPUT OF 250 WATTS
> FOR PLATE MODULATING TO 100% TBK SERIES
> WHEN OPERATED AT 1/2 POWER. PUSH PULL.
> DRIVEN BY 50055 SPEECH AMPLIFIER. INPUT
> 1500 VOLTS AT 300MA AND 115/l/60.
> FOR USE WITH TBK SERIES
> 
> 
> There is a picture here: .http://ussindyradio.org/5225ontherack30s.jpg
> 
> the CRV-50193  mod unit is on the bottom left, the speech amp is sitting 
> on top of it. 
> 
> TNX, Durff
> 

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