Walter, at least in my FRK manual the External frequency Adjustment is
addressed on page 4-7. In brief you connect a 1k0 variable resistor
between pins 8 and 9 as you have the variety with those connections. I
have a pencilled note saying that you may need to add some components
: [time-nuts] Re: Some assistance with Ball-Efratom FRK-L Rb Osc.
Needed
If you look at the schematics of the C-field adjustment circuits, you'll
find where the tweaking is available for fine tuning the Rb system. I think
that's the only "frequency adjustment" spot to worry about.
If you look at the schematics of the C-field adjustment circuits, you'll
find where the tweaking is available for fine tuning the Rb system. I
think that's the only "frequency adjustment" spot to worry about. The
other is the tweak for the crystal oscillator to accommodate long term
drift
As Bob says you can use an internal or external supply and 10K pot to
ground or leave open.
With respect to the internal regulator. I think there are two things at
startup: the voltage is higher and drops after ignition. So go with the 24V
supply about 2 amps should work and to some extent that
Hi
The “normal” FRK-L is the low phase noise version of the FRK.
There are two “external control” options. One is a 10K pot the
other is a EFC voltage. Simple answer is to short the wires / leave
them open.
The big deal is finding out if the beast still locks and how much
signal is getting
