About Us

Chris Suslowicz · April 17th 08, 10:51 PM posted to rec.radio.amateur.boatanchors

In article ,
(Scott Dorsey) wrote:

Chris Suslowicz wrote:

Chris.
(Yes, I'm involved with the site in question (and the Yahoo! group),
and it's run as a _service_ to anyone interested in the equipment,
etc. at no cost to them (and considerable cost in time and money to
the site maintainers. /Declaration of interest)

I do find the arrangement a little bit cumbersome, but I understand the
issue involved.

That said, I got the proffered No. 19 set, and I am not exactly sure what
I am doing yet, but the basic design of the A set seems reasonably
straightforward.

The unit has had the meter gutted and wires soldered the the Pye connectors
in order to hook it up.

So, I guess my FIRST question is what the meter movement is. I gather
from the schematic that it's an ammeter but I don't know what resistance
or full-scale current.

Offhand, the meter os 0.5 mA FSD, scaled 0-15 and 0-600. I'm not sure what
the internal resistance is supposed to be (all the ones I've just looked
at say "WS19 Voltmeter", which is not exactly helpful[2].

I think the US meters were made by Weston, Triplett and possibly Simpson(?),
and there should be spares floating about on the surplus market still.
(There are some NOS ones on ePay, but at very silly prices.)

And my second question is where I get Pye sockets so I can hook up a
couple bench supplies.

Ah... by "Pye sockets" I assume you mean the power and control ones?

("Pye connector" usually means the antenna connectors, which were used
on all sorts of kit.)

Can you get the solder cleaned off the pins, or are you looking for
replacement power and control plugs as well as the sockets? I've got
a few spares but am on the wrong side of the pond so shipping will
take a while...

Looking at this, it appears to have been badly butchered over the years,
with a lot of substitutions made.

You haven't seen some of the ones /I'm/ considering rebuilding[1] - that
one looks positively mint by comparison.

I don't think I am going to have the time to get this one up and
running for Field Day. This year anyway.

It's good to have a hobby.

g,d&rlh.

Chris.
[1] An AGI-built Mk.II with an ATU built into the 'B' set space, all
the connectors replaced, extra controls here and there, and the switches
painted with fluorescent orange fishing-float paint. The other one (a Pye
built set refurbished by Roneo-Vickers (I think) in the 1950s) has other
strange things (like an EF80 with 6V MES bulb as heater ballast mounted
horizontally under the chassis where the 'B' set Tx/Rx relay used to be)
done to it. Finding original parts to restore the 'B' set will be the
tricky bit, I think.

[2] Apart from the one in the AGI set, which has been replaced by an
Air Ministry 0-500mA thermocouple RF ammeter. Cringe I assume
this is part of the built-in ATU addeed by a previous (SK) owner.

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