Lee is very correct about the PS7 and a little bit of stray RF. If you have any accessories on the 12 volt line (RCA jack) of the PS7, make sure that there is a .01uf cap across that line inside the PS7. I believe that was a factory upgrade/mod fairly early in the PS7 history.
Usually this show most often on 40 meters becasue it is the peak gain of the original final RF brick. If you fix it there, you then usually have a stable PS7. BTW if you are not currently using a switched AC power socket, I would recommend that you look into one (computer switch deck is a good solution). The TR7 power switch/pot combo is put under quite a bit of stress with on/off cycles. I have not tried to locate a duel pot, duel switch combo, but my guess is that it is non-existent. 73, Ron WD8SBB --- On Wed, 4/13/11, [email protected] <[email protected]> wrote: From: [email protected] <[email protected]> Subject: Re: [Drakelist] TR-7A Shutting Down At High Power To: [email protected], [email protected] Date: Wednesday, April 13, 2011, 4:16 PM Also have your friend check his grounding. Stray RF getting into the PS-7 will also shut it down. 73 Lee WB6SSW -----Inline Attachment Follows----- _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
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