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

Rex rexa at sonic.net
Tue Oct 12 04:38:00 UTC 2010

  The ability to easily do this kind of graphics stuff (scanning and 
printing) at an affordable price is one of the few recent innovations 
that I appreciate over the great design and longevity in older tech 
equipment. Meld the two =  win-win.

On 10/11/2010 5:22 PM, paul swed wrote:
> Thanks Bill the scale is fine. Its the meter needle that had paint peeling
> off.
> Just pulled the meter and removed the loose paint. Also just scanned the
> meter face so in the crazy possibility of the decals peeling I can just
> print a new face.
> Now to locate a hobby store (that may actually be really tough these days.)
> and find some enamel paint of approx correct color.
> Kind of a florescent red and really a little dab will do you.
> Regards
> Paul.
> On Mon, Oct 11, 2010 at 11:22 AM, Bill Janssen<billj at ieee.org>  wrote:
>> 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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