[Milsurplus] [ARC5] Navy GP-7 Transmitter Connectors Available

[Joseph Pinner]

Thanks for the advice and encouragement.

I am constantly amazed at the knowledge of the people on this list.

Joseph Pinner +
818 Hill Street
Kingston, TN  37763

KC5IJD . NNN)PHR

----- Original Message ----- 
From: "Mike Hanz" <aaf-radio-1 at aafradio.org>

>> Can you run a GP-7 or TBW on 400 cycle power?
> 
> Sadly, no.  There simply isn't enough iron in the power transformers to 
> support the lower frequency at the power level required of the 
> transformers.  You also have the problem of keying the set in CW mode 
> with a lower line frequency, which in theory would require larger 
> filtering capacitors to maintain the same ripple specification.  
> However, there are a variety of lab inverters that can be tuned upward 
> to 800Hz.  My favorite is the older Behlman series like the 100-C and 
> 100-AS, though you could probably squeak by with a 75-C or 75-AS at 
> 750VA.  They don't usually bring as high a price as the later ones with 
> a digital meter, but still provide a kilowatt with less than 1/2% 
> distortion.  You have to have patience and keep looking - the ones on 
> ebay at the moment all suffer from the overpriced buy-it-now problem, 
> but occasionally you will see one appear for a lot less.  Repair is 
> fairly easy - the older ones are all discrete component designs and only 
> uses any chips in the small oscillator drawer, IIRC.
> 
> Vy 73,
> Mike  KC4TOS
> 
>