[Collins] 516F-2 cable

[Gerald]

On Fri, 2005-06-03 at 17:35 -0400, Merle wrote:
> Hello to the list. I received a call from a friend of mine in MA who does not have Internet capabilities. He is looking for 5 or 6 feet  of the multi conductor shielded cable for his 516F-2 power supply. I have no idea where he can find this. My thought was he could possibly purchase one of those extender cables someone was selling to allow you to operate the PM-2 supply separate from the KWM-2 / 2A ??
> Thanks for reading this, if anyone knows of a supplier please let me know and I will see that Billy gets the information.
> Thanks  Merle W1GZS

It was a custom cable. Needs a lead insulated for 1 KV, then several
rated at 3 to 5 amps for the heaters (and the heater series/paralleling
is done at the supply end, not at the connector) and a pair rated at 3
amps for the line switch. The rest of the voltages and currents are
small and could be carried in 300 volt insulated 22 gauge.

If one stretches 600 volts RMS to 900 volts DC rating, there are a
couple commercially available cables with multiple 16 gauge conductors
but they aren't available in short lengths (100 or 500 foot rolls being
the norm) and they can easily be too fat to fit through the cable clamp
on the connector shell.

I've had some correspondence from Dave Knepper about the topic where he
was expecting a company who was considering getting the custom cable
made and they were looking for details of the cable from me, but I've
not heard anything from them. Its something that needs to be solved for
those making reproduction supplies, those repairing supplies, and those
making accessories like extensions and multiple radio switches. And it
looks like it is quite solvable, just takes a chunk of money up front. I
know back in '64 at Collins, getting a custom cable made wasn't
difficult, but I didn't worry about the price when the project needed
that cable to function.

If there was a truly flexible heat shrink tubing, one could make up the
cable using ordinary hook up wire of the various needed ratings along
with some braid for shielding. It would be nicest if that flexible
shrunk tubing was gray in color also.

-- 
73, Jerry, K0CQ, Technical Advisor to the CRA
All content copyright Dr. Gerald N. Johnson, electrical engineer