The HP5090A is a Droitwich receiver to get the 200kHz standard
frequency transmission from Droitwich UK.
Some buffoon of a bureaucrat moved the transmitter to the much more
useful frequency of 198kHz, where it is today.
I have one of these receivers and somewhere some circuit manual
information given to me by a guy who had
modified his receiver to the new frequency including getting a new
198 khz rock. It has a TCXO.
The unit is interesting in that it seems to have been designed/built
in UK and has UK flavoured design as very distinct from US design.
It is in a standard HP box. My receiver still works, it will lock on
to the 2nd harmonic of a 100kHz signal from the divider driven by my
Tbolt.
cheers, Neville Michie
On 15/10/2010, at 8:10 AM, [email protected] wrote:
In a message dated 14/10/2010 20:46:15 GMT Daylight Time,
[email protected] writes:
OK, I just got one of these as part of a lot of other test gear.
What is it for? I found nothing searching the archive, and Google
didn't
help much either. The Agilent site disclaimed all knowledge!
I suspect it MIGHT be an off air frequency standard as it has 1MHz
and
100kHz outputs and an aerial input.
Any clues - or pointers to documentation?
---------------------
Hi David
It's a standard frequency receiver, or at least the 5090A was anyway.
I don't know how similar they are but the 5090A was a bit of an
oddball, in
that it was an HP instrument made specifically for the UK, or UK and
Europe, and the input frequency was specified, im the October 1965
manual as....
"200-Kc British Broadcasting Corporation Light Program Carrier" :-)
I bought the manual some years ago, just out of curiosity, but
have never
come across one of the units.
I'm quite jealous:-)
I'll do a quick scan of the 5090A photo and send that to you direct
just to
confirm it's the same or similar and should be able to sort out a
complete
scan if you're not in too much of a hurry.
regards
Nigel
GM8PZR
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