Hello The Net:
The frequency measurement division broke off, but was still in Cambridge
in ~2007.
I got a call from them about a 19 KHz pilot tone generator that was off
freq at a
FM/NCE station on Cape Cod. After replacing the Optimod ($100) xtal, all
was fine.
I will eventually think of that organizations name, but for now the POC
was Richard.
Yes, his techniques were cryptic, but I doubt if his techniques exceeded
the capability of any time
or freq nut's capability.
I would start with a search at SBE for such freq measurement organizations.
Stan, W1LE Cape Cod FN41sr
On 10/15/2011 10:57 AM, J. Forster wrote:
Cambridge Thermionic was on Concord Ave, just east of the Fresh Pond
circle. The building is now a storage warehouse.
They were mostly making screw-machine components by the early 60s. They
had a vast array of stake-in terminals and similar stuff. Very good
product, IMO. You could get damn near anything you could imagine in
terminals from them, uninsulated and insulated.
They also made a bunch of other electronic hardware like coil forms.
Again, very good quality.
The other thing they made was thermoelectric heat pumps and products using
them, like small "ice bath" references for thermocouples. I suspect this
was related to their expertise with ceramic-metal attachment.
At some point (70s? 80s? 90s?) they moved someplace else and changed their
name to Cambion.
Best,
-John
============
Les,
I do sort of remember Cambridge Thermionics. I came across their
name back in the late 60's or early 70's when I first got in the
frequency measurement "business". I think I also remember seeing
their name as a parts supplier in some WW-2 military radio manuals.
Burt
From: "Lester Veenstra"<[email protected]>
Bert:
I wonder if you happen to remember a company called Cambridge
Thermionics. Located in Cambridge MA, they made ceramic slug tuned coil
s
but in one corner was an individual with the off air frequency measuring
service. As a duty engineer up the read at WCOP in Lexington, I
frequently
would get calls from him to tick a dummy plug in the modulator input
patch
(turning the board gain down was too much residual noise), so he could
measure us, and more often, to remove the carrier for a few seconds so
you
could measure some one co-channel. He never wanted to talk about how it
did
it, and absolute would not accept visitors who might learn his dark trade
secrets.
I had assumed that these days a GPSDO would remove the need for the
monthly "freq service" but I guess not.
I stood my last midwatch at COP and reported to the Boston Army station
for
induction into the USN the next morning.
73 Les
Burt I. Weiner Associates
Broadcast Technical Services
Glendale, California U.S.A.
[email protected]
www.biwa.cc
K6OQK
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