[time-nuts] Cambrideg Thermionics & Freq Measurements...
stanw1le at verizon.net
Sat Oct 15 11:41:33 EDT 2011
Hello The Net:
The frequency measurement division broke off, but was still in Cambridge
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
I will eventually think of that organizations name, but for now the POC
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.
>> 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.
>>> From: "Lester Veenstra"<lester at veenstras.com>
>>> I wonder if you happen to remember a company called Cambridge
>>> Thermionics. Located in Cambridge MA, they made ceramic slug tuned coil
>>> 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
>>> would get calls from him to tick a dummy plug in the modulator input
>>> (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
>>> could measure some one co-channel. He never wanted to talk about how it
>>> it, and absolute would not accept visitors who might learn his dark trade
>>> 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
>>> induction into the USN the next morning.
>>> 73 Les
>> Burt I. Weiner Associates
>> Broadcast Technical Services
>> Glendale, California U.S.A.
>> biwa at att.net
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