[Boatanchors] Boatanchors Digest, Vol 98, Issue 36

[Geoff]

Call them and ask for Ted, its worth the shot.

Carl
KM1H


----- Original Message ----- 
From: "David C. Hallam" <dhallam at knology.net>
To: "Geoff" <geoffrey at jeremy.mv.com>
Cc: <boatanchors at mailman.qth.net>; "Monty N5ESE" <n5ese at prismnet.com>
Sent: Tuesday, March 27, 2012 10:15 AM
Subject: Re: [Boatanchors] Boatanchors Digest, Vol 98, Issue 36


>I have tried adjusting the mica trimmer on the oscillator but it all the 
>way down.  I can raise the frequency by adjusting but not lower it.
>
> I am feeding a 5 mV 1 KHz signal to the processor.  At the product 
> detector I can see the oscillator signal at the base; the signal from the 
> limiting amp at the emitter; at the collector where I am expecting to see 
> the recovered audio but instead see the oscillator signal.
>
> David
> KW4DH
>
> On 3/27/2012 9:38 AM, Geoff wrote:
>> I suspect that is correct as I remember the short tour thru their little 
>> plant at the Beverly Airport (MA) when I picked mine up probably in 66. 
>> Tolerance in the inductors was anything but precise and mine made a 
>> return trip twice for alignment. The owner had been an engineer at 
>> National.
>> Interestingly enough they are still in business and Ted Johnson is still 
>> in charge.
>>
>> Carl
>> KM1H
>>
>>
>>
>> ----- Original Message ----- From: "Monty N5ESE" <n5ese at prismnet.com>
>> To: <boatanchors at mailman.qth.net>; "David C. Hallam" 
>> <dhallam at knology.net>
>> Sent: Monday, March 26, 2012 9:52 PM
>> Subject: Re: [Boatanchors] Boatanchors Digest, Vol 98, Issue 36
>>
>>
>>> David:
>>>
>>> According to a QST Product Review in March 1967, the LO is at 16
>>> KHz.  I suspect that can get tweaked up or down a smidgeon to get the
>>> lumped LC Bandpass filter centered.
>>>
>>> 73,
>>> monty  N5ESE
>>> http://www.dit-dididit-dit.com
>>>
>>>
>>> At 07:44 AM 3/26/2012, boatanchors-request at mailman.qth.net wrote:
>>>> Date: Mon, 26 Mar 2012 07:15:52 -0400
>>>> From: "David C. Hallam" <dhallam at knology.net>
>>>> Subject: [Boatanchors] Comdel CPS-11 Speech Processor
>>>> To: Boatanchors-qth <boatanchors at mailman.qth.net>
>>>>
>>>> Does anyone know about the Comdel CSP 11 speech processor?  I am trying
>>>> to troubleshoot a recalcitrant one.  What is the carrier frequency? I 
>>>> am
>>>> measuring 17.4 KHz and don't know if that is right or wrong.  The 
>>>> manual
>>>> isn't much help.  Other how to hook it up and a schematic, there isn't
>>>> much in it.
>>>>
>>>> I keep thinking that years ago I read something about the Comdel saying
>>>> it used 85 KHZ as the carrier.  So far Google searches haven't turned 
>>>> up
>>>> anything.
>>>>
>>>> David
>>>> KW4DH
>>>
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>
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