"Jeff Liebermann" wrote in message
news
On Sun, 26 Jan 2014 10:25:16 -0500, "Ralph Mowery"
wrote:

"Jeff Liebermann" wrote in message
. ..

At the time, I used a Gertsch FM-something. It's the box with only
the left handle showing at the extreme right of the pictu
http://802.11junk.com/jeffl/pics/Old%20Repeaters/slides/PMC02.html

I can not tell what the Gertsch is from the pix. I have a Singer/Gertsch
FM-10C, but it looks to be older than that.

I tried to find a better photo of the generator, but couldn't. It's a
Gertsch FM-7 and DM-3 modulation meter combination, which is partly
shown in the photo. I think it looked something like this:
http://www.ebay.com/itm/141159577401
The Measurements (later Boonton) Model 80 was my "calibrated" signal
source. I let it drift onto frequency using the FM-7, and used it to
measure sensitivity. If left on continuously, it was stable enough
for the old 50 KHz wide band radios.

Do see the old generator next to
the scope. I have one like that and play with it from time to time.

http://www.ko4bb.com/Manuals/09)_Misc_Test_Equipment/Boonton/Boonton_Model_80_Manual.pdf
I still have some acorn tubes for it buried somewhere.


The Boonton you have is the AM modle. The one I have is the FM modle and
the number is T1035B. From the pix you had it, at first glance it looked
like a differant modle as part of it was hidden. Mine works through the 450
mhz reagon. It does have a scale for something between 800 to 900 mhz that
is not calibrated. Also there is another oscillator that is not calibrated,
but adjustiable that covers some low frequencies of between maybe 3 to 30
mhz. I think that is the one or maybe a later transistorised version that
is shown in some of the old GE Mastr ll books.





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