I think Garey had mentioned you can fry the plate resistor on V8 if you short one of the trimmer caps while tuning it.
It's still odd to me to have a resistor fail shorted. The 6HS6 will have the same switch settings as a 6AU6 but it has quite a bit more gain and a different bias setting. TV-10 D/U settings are: tube fil v switches bias shunt scale button min reading 6HS6 6.3 JR3-5672 12 --- D P3 3000 6AU6 6.3 JR3-5672 10 --- D P3 2050 The 6HS6 has quite a bit more gain (these are minimum, and I remember seeing 4200 from typical new ones). Good luck. Steve, W1ES/4 -----Original Message----- >From: rhule...@comcast.net >Sent: Dec 22, 2011 1:33 PM >To: Steve Wedge <w1es1...@earthlink.net> >Cc: Drakelist@zerobeat.net, kc9...@aol.com, k4...@mindspring.com >Subject: Re: [Drakelist] AC-4R Surprise > >All, > >Well my "luck" or lack thereof continues... I pulled the 6HS6 and then >referenced my Eico 625. Of course the 6HS6 isn't mentioned anywhere in any of >the charts I have. So, based on some results of a search, tested it as a 6AU6 >and then a 6HR6. Former showed "good", latter showed "marginal", neither >showed "short". > >So, I guess r61 failed sometime in the past but not the cause of the power >supply going south. At least I don't need to try finding another 6HS6, my >usual source for tubes shows 6HS6 "out of stock". > >I'm certainly old enough to know better, but suppose will just keep checking >tubes as a start while I have the tester out of the cabinet and on the desk. > >73, Curt KB5JO _______________________________________________ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
