[Milsurplus] Question about signal generator

[Bob Camp]

Hi

I think you will find that what you have is more commonly known as a 
"Measurements Model 80 Standard Signal generator". Like a lot of 
American companies Measurements went through several ownership / name 
changes.  In 1961 the name of the company was "Measurements, A McGraw 
Edison Company". They were located in Boonton, New Jersey.

The generator covers 2 to 400 MHz if I remember correctly. The 
oscillator is a acorn tube. The frequency selection is via a large 
turret with the RF oscillator components on it. The attenuator is a 
"coax beyond cutoff" type with a pickup loop that slides up and down in 
the tube.

These were one of the workhorse generators of their era. In the 1950's 
before the UHF bands became popular you could find may of them in US 
two way FM radio repair shops. These were common enough generators that 
manuals should be out there on the net. I did not see any in a quick 
search. There probably was a military version of the generator as well 
but I don't know what it was called. If there was a military version 
then a manual for it is probably available as well.

The only thing to be sure of when using the generator is to put a 6 db 
pad on the output. The coax and sense loop setup does not always 
provide a well matched 50 ohm output impedance from the generator. 
Other than that this was a standard piece of bench gear designed for 
daily use by normal human beings. Like all tube based gear you need to 
be careful powering it up, but if it fires up then it's fine.

	Take Care!

		Bob Camp
		KB8TQ




On Mar 12, 2005, at 6:27 AM, Wim Lakeman wrote:

> Dear Listers,
>
> Recently I obtained a Mc Graw-Edison Signalgenerator model 80.
> Anyone familiar with this model?
> I like to know how to operate this signalgenerator.
>
> Best regards,
> Wim Lakeman
> The Netherlands
>
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