[time-nuts] Possibly OT - Any interest in a vintage HP/Dymec DY-5842 VLF receiver?

[Bill Janssen]

paul swed wrote:
> An update. Indeed its working very well now. Easily at -88dbm. Its quite
> interesting in the fact that if you set the Local oscillator exactly at 160
> KC which today is easy to do, you actually have mis-adjusted it. It dawned
> on me this morning that since its a freq LO add and then subtract scheme.
> That you actually adjust it for peak signal through the 100KC IF.
> Essentially disregarding slight literal offsets. (This is the same approach
> some navy receivers use back in the 70s, and some older ham equipment.)
> The unit cleaned up very well though still have some tape glue to remove and
> label gunk from stickers.
> The biggest challenge is gently pulling the meter out and removing the
> peeling needle paint thats jamming the needle. No coffee during that
> exercise.
> Regards
> Paul.
>   
I have had some success with putting the meter scale back down with 
water. It seems on some meters
that the scale was a decal that had a water based glue. I used a tooth 
pick to put a drop of water under
the part that was lifted and the used the tooth pick to smooth the scale 
back in place.

Bill K7NOM
> On Mon, Oct 11, 2010 at 1:09 AM, Paul Davis <ziggy9 at pumpkinbrook.com> wrote:
>
>   
>> In case anyone was wondering, the receiver has found a home with Paul,
>> WB8TSL. He tells me he's got it receiving WWVB already. It will need a
>> little TLC, but it was good to see its basic functionality confirmed.
>>
>> I've posted the scanned copy of the manual on my website at <
>> http://www.pumpkinbrook.com/DY-5842/> for those that are interested.
>>
>> Thanks for the interest, and the replies.
>>
>> Paul - K9MR
>>
>>
>> On Oct 2, 2010, at 2:40 PM, Pete Lancashire wrote:
>>
>>  Ken would be a great person. THe HP Memory project would be another
>>     
>>> http://www.hpmemory.org/index.htm
>>>
>>> -pete
>>>
>>> On Fri, Oct 1, 2010 at 3:50 PM, Brian Kirby <kilodelta4foxmike at gmail.com>
>>> wrote:
>>>
>>>       
>>>> You might consider contacting Dr. Ken Kuhn  --  kennathakuhn at gmail.com
>>>>
>>>> check his HP museum at http://www.kennethkuhn.com/hpmuseum/
>>>>
>>>> Brian Kirby KD4FM
>>>>
>>>>
>>>>
>>>> On 10/1/2010 5:34 PM, ziggy9 wrote:
>>>>
>>>>         
>>>>> Fellow time-nuts:
>>>>> I've got a circa 1964 DY-5842 VLF receiver. This is (was) operated in
>>>>> conjunction with an external time interval counter to make a frequency
>>>>> comparison. So you would select WWVL for example, and use that as your
>>>>> primary standard for comparison to your local standard. It's got 5
>>>>> crystals
>>>>> in it: 16, 18, 19.8, 20, and 60 kHz (listed as GBR, NBA, NPM, WWVL,
>>>>> WWVB).
>>>>> It works and I have the manual. The thing is, the interest in something
>>>>> like this is bound to be a bit narrow, so I thought I'd mention it here.
>>>>>
>>>>> So if there are any collectors, equipment museums, etc. that might be
>>>>> interested in this, please let me know. I'm a bit sentimental about this
>>>>> thing, it's sort of a bit of history, and from what I can tell, somewhat
>>>>> rare (doesnt make it worth anything though :). Since it's a bit of a
>>>>> curiosity, I'd like to pass it to someone that might be interested in it
>>>>> rather than just tossing it. I can always provide more details to anyone
>>>>> that wants them.
>>>>>
>>>>> Best regards,
>>>>> Paul Davis - K9MR
>>>>>
>>>>>
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