[Milsurplus] PP-4763 wows

[Ray Fantini]

Cool, been operating from 120 but have a 220 volt outlet in the shop and will look at converting over. Figure that at full power the GRC-106 is sucking down a little over 1 kW  so with the efficiency of the power supply and the like probably pulling around 10 amps at 120 volts and changing to 220 would cut that by half. Fortunately have a sub panel out in the shack that provides a couple dedicated circuits along with a 220 volt outlet that I was using with my old RCA Broadcast transmitter that I had on 160, the only disadvantage would be that when I roll the 1104 out to the garage to start things like the M151 its convenient to plug it into an regular outlet but this may be an excuse to go ahead and install 220 volt outlets in the garage being that way maybe the big air compressor would be happier?
Cannot imagine what people with things like the old dynamotor first generation T-195 have to do to get them started? Although think they only require around 40 amps for operation think the manual says that you needed around 250 Amps surge to kick the dynamotors into operation. Perhaps the T-195 may be the king of current draw for power output in military radios? Wonder what the kick over requirements were for the huge dynamotor for things like the ART-13 or BC-191 transmitters?

Ray F/KA3EKH


From: Tom <noflood1 at sonic.net>
Sent: Monday, February 15, 2021 4:07 PM
To: Ray Fantini <RAFANTINI at salisbury.edu>
Cc: milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] PP-4763 wows




 My PP-1104 does a good job spinning up the DY-17 Dynamotor for my ART-13 but it work much better if wired for 220 than 110.



                                                                   W6TOM
Before you do anything to your PP-4763 I have a PP-1104 that’s the standard military 12/24 volt power supply that has no issue providing high current. Think its rated at 100 amps at 12 volt and 50 amps at 24 volts. It’s not intelligent, uses a magnetic amplifier that somehow controls regulation of the output to within a volt or two between heavy and no load and has no issues doing things like starting cars or huge dynamotors. The only issue is it weighs 152 Lbs. so it lives on a furniture dolly.
I use it to work on GRC-106 sets and runs them at full power with no issue but would be better if I had the proper PP-4763 so would be more than willing to do a trade.


Ray F/KA3EKH



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