[MFJ-Ameritron] High SWR Input to AL811H, beyond range of tuning slug.

[Dean]

RE: AL811H 6 years old with 572B Tubes

Sometime in the last few years, the SWR input for 20 meters has come up to about
SWR 2.5 and is now turning down my radio power on the K3. I tried adjusting the
20 meter tuning slug but it is beyond the adjustment range and SWR 2.5 is the
best I can do.

The other bands are a lil high but not above 2.0 SWR so no big deal.

Does anybody know how to adjust the input tuning range by adding or subtracting
capacitance/resistance in the tuned input circuit? Any other ideas?

The tubes are 572B that I put in a few years ago and they seem OK.

Thanks for your help!

Dean