XV144 transverter - output power instability

[Johnny Siu]

Hello Group,

I notice output power instability in my XV144.  After I tuned the max output power by R22, I closed the XV144 with the top cover.  However, upon tightened the screws on the top cover, I notice a 20-30% reduction in output power.

I tightened all the screws and keyed the XV144 again with my K3.  I notice a output power facilitation between 12 - 18watts in my Kuranishi VHF/UHF power meter.

Could any of you advise what is the likely problem and how to trouble shooting?

TNX & 73

Johnny Siu VR2XMC


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