David,
To answer your question, no it has not been incorporated on the XV series.
Some transverters are just fine without it, but some others show that
problem behavior.
I usually add it to any XV transverter that I service, and I would
encourage any owner to do the same. It simply filters any noise off
that signal line whose only component should be DC.
73,
Don W3FPR
On 12/15/2014 4:58 AM, David G4DMP wrote:
Magic! I have just read your advice to Stewart GM4AFF and recognised a
phenomenon I have been getting with my XV144 for years. I had assumed
that the flashing LEDs were due to my fault in overdriving.
I have just added a 0.1 across E & C of Q7 and that has cured the
problem. I must now do the same with my XV70.
Am I to assume that this mod has now been incorporated in new XV---
kits?
I am ever thankful to you, Don, for your valuable contribution to the
reflector.
73 de David G4DMP
In a recent message, Don Wilhelm <[email protected]> writes
There are some XVnnn transverters that falsely detect an overload
condition. That is due to noise on the COR detection line. An easy
cure for that is to remove the front panel metalwork and solder a 0.1uf
capacitor between the collector and emitter of Front Panel Q7. It can
easily be added to the solder side of Q7 without removing the front
panel board.
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