[Milsurplus] Nems-Clarke preamp

[J. Forster]

The preamp is very likely 216 to 260 MHz. That was a standard IRIG
telemetry band. The transmitters were hybrid with an output of 5-10 Watts.
Modulation was likely FM/FM.


It might also have been used w/ an R-1037.

-John

============


> While cleaning the garage, I uncovered a preamp that I probably
> bought at a hamfest many years ago.
> This is a Nems-Clarke PR-203S.
> Using Google I only found reference to this in a NASA Project Mercury
> document.
> This dates the preamp to the late 1950's.
> They list it as used in the telemetry system with a Nems-Clarke 1412
> and a 1434 receiver.
> I found that a 1412 receiver covers 215-260 Mcs.
> I found nothing on the 1434.
> This preamp does have a NASA tag on it.
>
> Does any one have any data on this preamp, gain (probably low), noise
> figure (probably high), frequency range?
>
> I suspect that it uses a tube, probably a 7077.
> When it cools down some I will probably open it up and see what is there.
> The RF connectors are type N and power is AC 115V via a Cannon type
> connector.
> The case has a fixed handle on the top and cooling fins all the way
> around the case.
>
> 73
> Glenn
> WB4UIV
>
>
>
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