[Collins] INFO PLEASE

[Dr. Gerald N. Johnson]

On Thu, 2009-06-18 at 07:14 -0400, Gary wrote:
> I have acquired a few transformers and chokes with Collins numbers on them. A search of the internet turned up nothing. Is there any Collins members that mite be able to help. The following numbers are...............
> 668-0199-010
> 664-0124-030
> 668-0200-010
> These were made by "BASLER ELECTRIC" for Collins.
> Regards,
> Gary

I wish I had  a room full of aperture cards holding microfiche. Then I
could answer that question. They aren't for S-line that I can see. If
they have wire leads they can be tested and the power rating guesses.
Black and maybe black/white are usually primaries. Green is usually 6.3
volt heater, green/yellow for center tap. Red for high voltage,
red/yellow for center tap. Brown for 5 volt filament, brown/yellow or
some other combination for center tap. I like to apply 12 volts AC to
the primary, then I don't have 300 volts flopping around while I'm
checking the secondary voltages. Then with voltages and core size in
hand, I go look at a Stancor catalog to see what had about the same
voltages and core size and I can have a good idea of the rating.

Chokes are tougher, they tend to change inductance with current, but
there too, absent the amount of inductance swing (that's affected by the
air gap) comparing inductance, size, and resistance often gives a ball
park idea of value.

The 668 are chokes, the 664 a transformer. The dash numbers tell me
probably at least 1963 or later specifications.

It might be worth calling Basler, though they may not admit having made
them. Last I knew Basler was in western Illinois in a small town.

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