[Milsurplus] solid state dynamotor

[Spike Dennis]

As has already been noted, the power supplies used on the old GE Progress line transceivers work great. I used one to power my TCS for years. I also used the supply from a Motorola Motrac to run my GRC-9. RCA business band equipment of the same era will work equally as well, one of these currently runs my TCS from 110vac. Try to find the higher powered versions(2ea 6146 out put tubes). All these radios also had table-top base variants that are a good source for AC power supplies. Take care, some of these old radios also had dyno's in them, or vibrator supplies. Don't bother with those.

The next time you got a a hamfest & see a stack of old GE Progress Line transceivers or the like, pay closer attention!

KB0SFP



----- Original Message ----
From: "wf2u at ws19ops.com" <wf2u at ws19ops.com>
To: milsurplus at mailman.qth.net
Sent: Wednesday, December 17, 2008 1:45:10 PM
Subject: Re: [Milsurplus] solid state dynamotor

I'm dealing with a somewhat similar situation where I need a substitute for the dynamotor (12 VDC in, 500 VDC @ 200 mA out) which I don't have and may never find, for an AT-1, a WW2 vintage Canadian Marconi built aircraft transmitter.
I bought a 150 W, 12 VDC to 115 VAC car inverter for $24, which is fairly small.
I'll get a 115 to HV transformer - probably out of my junkbox, rectify the output and it'll work fine.
If one side of the inverter's 115 VAC output can be grounded (the -12 VDC is ground), I could just quadruple the 115VAC and get close to 500VDC out, without using a transformer.
Since the transmit/receive relay in conjunction with the system receiver (AR-2, which has a good working dynamotor) turns on the transmitter dynamotor only on transmit, I'm not even concerned with RFI from the inverter, as it won't be on during receive periods.

In receiver only service, any such inverter should be evaluated for RFI.

73, Meir WF2U
Landrum, SC
Quoting Ray Fantini <rafantini at salisbury.edu>:

> Anyone have a DC to DC inverter or solid state dynamotor  replacement? Was thinking of building up a replacement power supply  deck for my ARR-41 I am going to remove the original dynamotor deck  and set it aside in case I want to use it but want to build a solid  state replacement deck that will fit into the original radio and  allow it to operate without the noise of the dynamotor deck. Do not  want to change any of the DC distribution wiring so would prefer to  use something like the solid state replacement dynamotors that were  used on some of the last produced ARC equipment, also if anyone has  a hacked ARR-41 power supply deck less dynamotor that will save a  lot of fabrication.
> Ray Fantini KA3EKH
> 
> 
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