[Milsurplus] SS Power Supply for WS 58

[WF2U]

Marty,

The Wireless Set 53 is the British equivalent of our BC-610, in a similar
size cabinet, but with a bandswitch and a decent VFO. The VFO is a
sub-assembly drawer, from the MO up to the driver (807), sort of similar to
the T-368 concept of the VFO/driver as a separate sub-assembly. The WS53 was
usually paired with an R107 receiver, but in some mobile and portable(!)
installations (same as a BC-610 on a jeep) the R109 receiver was used.
Post-WW2 while the WS53 transmitter was still used, the receiver used with
it was the R209.

The 58 set is a small 6-9 MHz AM manpack set, sort of BC-611 on steroids...

73, Meir WF2U

-----Original Message-----
From: milsurplus-admin@mailman.qth.net
[mailto:milsurplus-admin@mailman.qth.net]On Behalf Of J. Forster
Sent: Sunday, November 30, 2003 7:57 AM
To: Help - trapped in surplus store; Milsurplus; Wireless-Set-No19 @
yahoogroups.com; Armyradios @ yahoogroups.com
Subject: Re: [Milsurplus] SS Power Supply for WS 58

Hi Marty,

The 58 set (NOT a 53 set) uses voltages as follows:

Rx:  A=1.5V @ 250 ma;  B1=90V @ 6 ma; B2=180V @ 0 ma; C=-21V @ ? ma

Tx:  A=1.5V @ 490 ma;  B1=90V @ 1.8 ma; B2=180V @ 20 ma; C=-21V @ ? ma

These numbers are from Wireless for the Warrior, Vol. 1

My estimate is that 8 'D' batteries should last > 50 hours. My rough design
uses
2 cells for the A battery & 6 for the B battery through an inverter. The
inverter uses 2 standard 12.6V CT, 300 ma Radio Shack transformers and two
MOSFET Power Transistors in a push-pull switcher operating at roughly 100
Hz,
driven from a 555 IC, 7474 FF to square the waveform up and ensure an
exactly
50% duty cycle, and dual peripheral driver to shift levels.. The -21 is from
a
Cockroft-Walton multiplier. There is a rewound reed relay to turn the
inverter
on and off.

Help - trapped in surplus store wrote:

> Jay I don't know a WS53 from Adam's housecat. But are I'm interested in
> running a BC-1000 and have a couple of questions
>
>   - size of pack
>
>   - the "A, B, C voltages"
>
>   - Is the supply a 'flyback' design using a TO-220 sorta monolithic
>     IC?
>
> Was going to ask about WS53 but went to Google & one page implies it's a
tx
> employed with the R308 UK rx.
>
>  Thanks
>
>    Marty



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