[Premium-Rx] Stereo

[Terry O']

Parts for the ultra rare WJ, CEI division  stereos appeared on eBay.  
These are from a later run that I did not know about until I saw these 
auctions.  I have pictures of the earlier CEI labeled units being 
aligned on the benches at 6006 Executive Blvd.

I don't know the seller, not have I seen manuals or any other 
documentation on these units.

http://www.ebay.com/itm/Watkins-Johnson-CEI-Unknown-Unused-Vintage-Faceplate-/272666594612?hash=item3f7c320d34:g:sgwAAOSwjL5ZE8MV 


http://www.ebay.com/itm/Watkins-Johnson-CEI-Unknown-Unused-Vintage-Faceplate-2-/272666595865?hash=item3f7c321219:g:BkcAAOSwsXFZE8PT 


http://www.ebay.com/itm/Watkins-Johnson-CEI-Large-Lot-of-Blank-Circuit-Boards-1-Memory-Board-/272666634570?hash=item3f7c32a94a:g:fcwAAOSwIaFZE8sw

Terry O'
http://Watkins-Johnson.terryo.org
http://BlackRadios.terryo.org



On 12/12/2016 8:16 AM, Steve Stutman wrote:
> Hi Terry,
>
> Any images of the Grimm gear?
>
> 73,
>
> Steve
>
>
>
>
>
> On Dec 12, 2016, at 8:30 AM, Terry O' <watkins-johnson at terryo.org> wrote:
>
>> I was given a butchered WJ receiver that contained a stereo demultiplexer.  I have never revived this radio to see if it works.  The idea is great, but in this radio, the mods done to the original IF and audio stages are appalling.
>>
>> During the CEI years, Ralph Grimm designed a stereo tuner and amplifier pair that was manufactured in the 6006 Executive Blvd plant.  I have pictures of dozens of these units under construction and testing.  They were never sold.  They were given away by Grimm.
>>
>> He also made the schematics available to employees and I have spoken to a couple who used them to build copies of these units for themselves.
>>
>> This equipment and documents are extremely rare.  I hope to see examples of them some day.  It would be interesting to see if Grimm used in house and readily available 21.4 MHz IFs or designed his own 10.7 MHz circuitry.  He was so much of a perfectionist that I am relatively certain these units are not populated with circuitry made anywhere else.
>>
>> Terry O'
>> http://Watkins-Johnson.terryo.org
>> http://BlackRadios.terryo.org
>>
>>
>> On 12/10/2016 7:21 PM, Peter Ratuschni wrote:
>>> Hello Peter,
>>> nice idea! I used to take the LF signal from the video out of a wj 8730A to feed the mpx circuit of a slightly modified FM tuner. (The 8730's audio output is to much lowpass filtered to contain any stereo information.)
>>> best regards
>>> Peter
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