[email protected] wrote:
I haven't seen too many of these in the wild so can I assume this
was the unit recently sold on Ebay?
It was indeed.
If so you got an excellent drive unit at a very good price, even if it
isn't working at the moment:-)
That's just what I thought. It's beautifully made... probably cost the
taxpayer a fortune in its day. :)
FCO standard equipment with these was the HCD-1519 1MHz frequency
reference and whilst they are specified to run from 1, 5, or 10MHz
I've tried it with both 1MHz & 10MHz & it locked up straight away with both.
Is there a number showing on the display to go with your "Fault"
indication, and are any other of the indicators illuminated?
Sorry... I should have mentioned that in my first post... it's showing Fault
4.
It's possible a link may be required on one of the rear connectors to
enable stand alone operation but again I can't remember offhand so
will check and come back to you on that too, but there shouldn't be
any significant wiring needed.
That's what I'm hoping.
Like much equipment from that era though these units suffered the
dreaded tantalum capacitor disease and it's quite possible that one
or more modules may be afflicted.
I brought it up gently on a variac, monitoring the rails as I went. They
were all good until I reached 240v, then one of the +12v rails went to 0v.
I traced it to a s/c tantalum in one of the modules. :-) All OK now.
I'll be extremely pleased if you're able to shed any light on "Fault 4",
Nigel, or what jumpers/connnections I might need to make.
If you have any printed data I'd be happy to pay all your costs for a copy.
Regards,
Mike
M0MLM
In a message dated 25/11/2012 09:39:11 GMT Standard Time,
[email protected] writes:
This unit is a part of the UK's Diplomatic Wireless Service's
"Piccolo" HF
RTTY network.
I have acquired one of these & am trying to get it working.
It accepts a 10MHz (or 1 or 5) reference & the output can be set to
any frequency between 3MHz & 29,999,900Hz, in 100Hz steps.
My unit is showing a "Fault" LED on the display, which I believe is
inhibiting the output. I can see a varying frequency at the o/p
socket, but only a few mV, not the 1v into 50R as is normal.
I suspect that the fault indication is because there's nothing
plugged
into either the "Keying Frequency Control Input" nor the "Carrier
Frequency Control Input" sockets. (There's also a "V.F. Inputs" &
"Carrier Output (BCD)" sockets.)
Can anyone help with a manual or connection details for the 2 input
sockets, please?
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
