[Test-Equipment] Strange WWV device by Projects Unlimited

[Bill Fuqua]

   Just took a closer look at it.
It seems that the WWV signal from antenna is summed ( combined) with the RF 
signal presented on front panel via an attenuator so that they are 
comparable in amplitude so an good beat note can
be generated.  The RF input may be a "sub harmonic" of 5 or 10 MHz.
    So an audio beat note or a visible one (magic eye tube) can be 
observed. It also provides the ability to receive the tones present on the 
WWV signal.
Looks like one or two RF amplifiers and Mixer plus several stages of IF 
amplification and probably AM detector.
73
Bill wa4lav


At 04:55 PM 12/27/2012 -0600, John Hensley wrote:

>To answer several questions, I put better pictures up of this WWV Calibrator:
>http://www.w5jv.com/Not_For_Sale/P-1376/
>It is indeed a model P-1376.  Not sure where I got the idea it was a 
>P-1375.  It iscrystallized for a 455 kHZ IF and as per the front panel, is 
>channeled for 5 and 10 mHZWWV.
>I can identify most components but a schematic or booklet would be helpful 
>readingthe not so obvious values.
>73, John W5JV
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