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

paul swed paulswedb at gmail.com
Tue Oct 12 13:31:05 UTC 2010


Boy do I agree with that.
If Diddier is reading this, wonder if we could add a meter scale to your
fine manual repository?
Regards

On Tue, Oct 12, 2010 at 12:38 AM, Rex <rexa at sonic.net> wrote:

>  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
>>>>>>>>
>>>>>>>>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>


More information about the time-nuts mailing list