RE: Strange failure mode of cathode resistors

OTL Asylum

OTL, Output Transformerless Amplifier User Group.

In Reply to: Strange failure mode of cathode resistors posted by 6AS7_6SN7 on May 20, 2012 at 01:19:14:

WOW...nice diy OTls....thanks for the post...The M60s that i have did not have any cathodes res..thay had a 1ohm on the plat..but i pull them an put in a 5ohm 6w on the on the cathodes.....i have found that the US made 6080..an the 6AS7...like GE..RCA...Dont work as well as the sovtek Tubes...the US tube go out from time to time.. till i just pulled all the US tubes ....an have had no prob...but if well all look at the cathodes res.... thay would be some out of 5ohm rang...if thay had went from 5ohm to 2ohm you could see this on the res...but move up from 5ohm too 10kohm...not so much.....Ralph has seen it all so well see what he says.....goodluck

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Follow Ups Full Thread

Topic - Strange failure mode of cathode resistors - 6AS7_6SN7 01:19:14 05/20/12 (8)

RE: Strange failure mode of cathode resistors - Ralph 09:43:09 05/21/12 (6)

RE: Strange failure mode of cathode resistors - MERCURY 4747 18:39:43 05/30/12 (1)

RE: Strange failure mode of cathode resistors - Ralph 13:39:56 05/31/12 (0)

RE: Strange failure mode of cathode resistors - 6AS7_6SN7 11:09:00 05/21/12 (3)

RE: Strange failure mode of cathode resistors - Ralph 12:09:29 05/21/12 (2)

RE: Strange failure mode of cathode resistors - tyu 11:51:26 05/22/12 (1)

done and used anytime later nt - Ralph 13:19:49 05/22/12 (0)

RE: Strange failure mode of cathode resistors - tyu 05:24:43 05/20/12 (0)

Follow Ups

RE: Strange failure mode of cathode resistors - tyu 05:24:43 05/20/12 (0)

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