[Milsurplus] Dynaverters

[Bob Camp]

Hi

I doubt they are much different than the solid state supplies built for 
other tube based gear. There are only so many ways to do a job like 
that.

A reasonable "commercial" equivalent would be the transistor based 
power supplies that ran the Motorola or GE two way radios. They handled 
similar power and voltage levels. The only difference would be the 12 
volt versus 28 volt input supply.

Unless you fully pot one of these gizmos it's going to "sing". You are 
moving a pretty good amount of current at the input and switching at a 
nice audio frequency. The transformer leads and even the leads on the 
emitter resistors moved enough to be audible.

Depending on the era you will either have nice fat germanium power 
transistors or later on silicon parts. The transformer feedback 
oscillator was pretty similar in both cases, but replacing the 
germanium's with silicon parts generally resulted in disaster.

None of that actually answers your question ....

	Take Care!

		Bob Camp
		KB8TQ



On Mar 26, 2005, at 12:50 AM, J. Forster wrote:

> Does anyone have any operational experience with the solid state 
> dynamotor
> replacement made for the ARC-5 type radios? I'm curious about how 
> electrically
> noisy they are (do they whine or whistle?)
>
> Does anyone have and specs or manuals or data sheets?
>
> Thanks,
> -John
>
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