[Premium-Rx] Any expert on RFT EKD-500 out there?

[Werner]

Here comes an update on my EKD-500-PLL problem: A least I could isolate the 
defective portion in the oscillator-PLL assembly. It is a circuit which is 
called "Fanghilfe" (catching aid?) by RFT. It is responsible to "precharge" 
the oscillator with a voltage that is dependant on the chosen frequency. This 
enables the phase discriminator to adjust more quickly to the reference 
frequency. Without it it needs some time (the "noise") during the "frequnecy 
rollover" (it is actually a 40 to 30 MHz change and vice versa). Since it is 
not simple for me (no oscilloscope) to detect "the one" faulty part 
(suspects: 3 transistors, 3 digital ICs, 1 ops-amplifier IC) I bought the 
whole oscillator board (new old stock) for reasonable money from somebody who 
has still some spares. Just installed it and everything is fine.
Again, thank you all for your help and suggestions. 

Werner