HP5090A Off Air Standard Receiver
Hi Pete
That's quite good timing, if you'll pardon the expression:-), as I uploaded
a pdf version of the 5090A manual to mediafire a couple of months ago....
http://www.mediafire.com/file/u0bf1eips89uo3h/HP_5090A_Ops_and_Service.pdf
I know a few others have considered converting the 5090A to 198KHz but it's
not straightforward and I believe the general consensus has been that it's
not really worth the effort.
I have a 5090B which I'm hoping to get up and running when it finally
reaches the top of the to do list and my view is that it would be much better to
leave the original electronics undisturbed and to drive it with a 200 KHz
signal divided down from a from a GPSDO or a rubidium module, although
having one of the latter already running at 800KHz does leave me a bit
biased:-)
Regards
Nigel, GM8PZR
Does anyone happen to have an electronic copy of the user / technical
manual they would share with me?All expenses covered.
This rather unusual unit was produced in the UK in the days or the rather
sensible 200kHz Droitwich transmissions.
Im considering reworking the unit to the newer 198kHz standard.
PeteG4GJL
On 06/18/2017 04:17 PM, GandalfG8--- via time-nuts wrote:> I have a
5090B which I'm hoping to get up and running when it finally
reaches the top of the to do list and my view is that it would be much better to
leave the original electronics undisturbed and to drive it with a 200 KHz
signal divided down from a from a GPSDO or a rubidium module, although
having one of the latter already running at 800KHz does leave me a bit
biased:-)
What in the world would the point of that be!? It appears to be a
long-obsolete product, so have you searched for more modern time code
receivers from timing instrumentation (Meinberg, Brandywine, et al.) and
surplus vendors? It'll probably be pretty expensive, for it's probably
much less popular than WWVB and DCF77. Have you tried the latter? It
might be receivable from Britain, and I've seen some surplus DCF77
receivers (e.g., an old ISA card).
-Ruslan
--
Ruslan Nabioullin
Wittgenstein Laboratories
rnabioullin@gmail.com
(508) 523-8535
50 Louise Dr.
Hollis, NH 03049
On Sun, 18 Jun 2017 21:52:04 -0400
Ruslan Nabioullin rnabioullin@gmail.com wrote:
What in the world would the point of that be!? It appears to be a
long-obsolete product, so have you searched for more modern time code
receivers from timing instrumentation (Meinberg, Brandywine, et al.) and
surplus vendors? It'll probably be pretty expensive, for it's probably
much less popular than WWVB and DCF77. Have you tried the latter? It
might be receivable from Britain, and I've seen some surplus DCF77
receivers (e.g., an old ISA card).
You aren't seriously asking a time-nut what the point of doing something is,
are you? We are doing what we do because we think it's fun. Because we
might learn something. Or because we think it would be cool. Not everything
needs to have a rational goal judged by price vs. performance, does it?
Attila Kinali
--
You know, the very powerful and the very stupid have one thing in common.
They don't alters their views to fit the facts, they alter the facts to
fit the views, which can be uncomfortable if you happen to be one of the
facts that needs altering. -- The Doctor
How about building a frequency converter to produce 200KHz; mixing the
incoming RF (198KHz) with 2KHz derived from the output of the unit,
On 18/06/2017 21:17, GandalfG8--- via time-nuts wrote:
Hi Pete
That's quite good timing, if you'll pardon the expression:-), as I uploaded
a pdf version of the 5090A manual to mediafire a couple of months ago....
http://www.mediafire.com/file/u0bf1eips89uo3h/HP_5090A_Ops_and_Service.pdf
I know a few others have considered converting the 5090A to 198KHz but it's
not straightforward and I believe the general consensus has been that it's
not really worth the effort.
I have a 5090B which I'm hoping to get up and running when it finally
reaches the top of the to do list and my view is that it would be much better to
leave the original electronics undisturbed and to drive it with a 200 KHz
signal divided down from a from a GPSDO or a rubidium module, although
having one of the latter already running at 800KHz does leave me a bit
biased:-)
Regards
Nigel, GM8PZR
Does anyone happen to have an electronic copy of the user / technical
manual they would share with me?All expenses covered.
This rather unusual unit was produced in the UK in the days or the rather
sensible 200kHz Droitwich transmissions.
Im considering reworking the unit to the newer 198kHz standard.
PeteG4GJL
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--
Stephen Tompsett
And Attila wins the reflector for today!!! <big smile>
Clay Autery, KY5G
On 6/19/2017 2:29 AM, Attila Kinali wrote:
You aren't seriously asking a time-nut what the point of doing something is,
are you? We are doing what we do because we think it's fun. Because we
might learn something. Or because we think it would be cool. Not everything
needs to have a rational goal judged by price vs. performance, does it?
Attila Kinali