[time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812...
GandalfG8 at aol.com
GandalfG8 at aol.com
Sun Nov 2 14:08:30 UTC 2014
Ooh err, whoops, and oh dear !!
Arthur, I've only just had a chance to look at your latest photos, and
unless I've really got my wires crossed, if you'll pardon the expression:-),
your links on J5 are not shown on pins 2, 10, 12, and 15, but on pins 4, 6,
11, and 13.
As far as I'm aware the numbering from the front of that connector as shown
starts in the top right hand corner and every row is numbered right to
left.
That's certainly how mine are numbered anyway, and I wired them
accordingly, and it worked, so where the heck does that leave us now?:-)
It might explain of course why I could dispense with most of your interface
but heaven knows what I've actually got strapped together!
Another "interesting" thing I noticed, once the Ref-1 unit is up and
running I can pull the plug from J5 and it keeps on going, to start with at
least anyway.
I pulled the plug on one unit to fit its cover and aside from the standby
light starting to flash, the ON light remained on and the outputs remained
enabled. It might have shut down if left like that but I haven't tried that
yet.
Next trick I think I'll try with just pin 3 grounded and go from there.
Which raises the next question, are the connections to pins 3 and 4
actually connected to what I think are 3 and 4 or do I have that different too?
Regards
Nigel
GM8PZR
In a message dated 02/11/2014 01:27:18 GMT Standard Time,
golgarfrincham at gmail.com writes:
Keep in mind that I made the modifications to my RFTG-u REF 1 almost
4 years ago and the details of why I did what I did are kind of foggy
today. It was a pure hack but I *believe* that the circuitry as well
as the jumpers were required, or at least I thought so. The big problem
with getting something like this to work is that after spending a lot
of time on it I generally go on to the next project and as long as what
I did works, I forget about it because it is a one of a kind thing. The
photo link below shows the 5Mhz buffer amp I connected to the TP in
front of the oscillator that uses a mounting bracket that is secured
by the BNC connector that outputs the 5Mhz. The 24V/2A power supply that
I mounted on the back connects across the diode on the circuit board as
shown. The transistors and other components of the modification that are
mounted free form on the back of the J5 connector get the +5VDC from
the header directly in back of J5. The wire on the left goes through an
existing hole on the circuit board to connect to the fault LED.
I was hoping that someone else would duplicate the modification just to
reassure me that what I did wasn't black magic. It looks like Nigel is
doing just that-thanks.
http://i906.photobucket.com/albums/ac262/rjb1998/RFTG-uREF1_zps546e4c82.jpg
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