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 <[email protected]> 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 <[email protected]>
wrote:
You might consider contacting Dr. Ken Kuhn -- [email protected]
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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