I am up in St Joseph MI and am having an issue with my TL 922a. It
> has Measures QSK & parisitic mods as well as 10m. The 3-500z's are
> about 7 yr old. The amp was idle for a couple of years until last
> month. I fired it up & heard some arcing & blew both fuses. I didn't
> see any obvious damage inside, replaced the fuses & it worked just
> fine.
> I now notice that it only puts out 200w on all bands, and since
> replacing the fuses the load & plate positions are reversed - with
> increased freq the plate tune position goes counterclockwise. I am
> testing with a dummyload & SWR is good, ALC control on amp is all
> the way off.
>
> The amp was putting out 900w CW when I replaced the fuses last month.
> Here are the current readings on the meter with 80w drive from a TS 450s:
> HV: 2kv CW, 3kv SSB
> Ip: 0.20 to 0.28 A on 40 thru 10 meters
> Ig: 60mA on all bands
> Power out of the amp is 200-250 w on all bands into a dummy load.
The bandswitch contacts were inspected and cleaned but did not help the problem.
> Does this sound like one of the tubes are bad or might this be another
> problem??
> I appreciate any advice.
>
> 73 de N9CQB
> Doug Schmutte
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|