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In Reply to: RE: Welcome to the Wonderful World of Cary... posted by Valva Actual on April 17, 2010 at 17:17:54
but they tax their rectifiers so bad that the are often good for a week or two, sometimes less, sometimes, if a good 5AR4, longer. A thermistor or inductor but most of the time there isn't going to be room for the right sized inductor so thermistor, L90, right after the rectifier.
The Elaborate DAC=Johnny's Balloon Meshplate 27 Balanced Preamp=Balanced Six Pacs=Newform Research 645
iRiver H140/MB-1 dual dac/Monica II Dac, modified Woo 6/Protector Balanced amp/Ultrasone Ed. 9/JH13 Pro IEM's
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Edits: 04/17/10Follow Ups:
So, I'm assuming that my Cary amp is taxing the rectifiers and this one particular rectifier is on its way out?
My amp is the Cary SLI-80 F1, All Triode/Zero NFB, with v-caps
bullshit.......i've had the same nos rca 5u4G cokebottle rectifiers in my sli-80, f-1 for 5 years now...running an average of 4 hours a day, everyday. nary a problem....the amp continues to satisfy me immensely
I also have a Cary SLI-80 (but not triode-wired) upgraded by 0.22uf V-caps. I am going to replace them with Jensen CIO caps as I attribute a somewhat dry and mechanical sound to V-caps.
Never had a problem with rectifiers (always used 5U4G type - Sylvania, RCA and Kenrad). The stock Sovtek 5U4G rectifiers produce much cleaner sound (not mellow and dark as with vintage rectifiers).
Also, this started happening once I changed the output tubes. I'm going to switch back to the EH 5U4GB and see if it still happens.
Do you change the bias every time you change recfifier tubes?
Not sure if that is directed towards me, or in general, but yes I do. It's easy enough to do. Better safe than sorry.
So, I switched to the EH rectifiers that I had previously and there was no flashing or sparks.
Not all new production are safe: I blew up a JJ 5U4GB a while ago.
Some tubes will not do it, at least for a while. My gripe is the more desirable NOS tubes will do it, and get blowed up before long.
On the bright side, rectifiers of this type are cheap and plentiful still.
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