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| Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
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2nd Apr 2017, 9:21 am
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#61 |
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Heptode
Join Date: Oct 2005
Location: Olympia, Washington, USA.
Posts: 664
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Re: 6SJ7 anode current
Could someone have replaced the glass 'SJ7 with a metal one? IIRC, pin 1 on the metal ones is typically grounded, and on the glass ones, it was floating and often used as a tie point. (That error really nailed me years back. Couldn't figure out what was killing the radio. Subbed in a glass tube and problem solved.)
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3rd Apr 2017, 5:31 pm
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#62 |
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Nonode
Join Date: Jul 2010
Location: Folkestone, Kent, UK.
Posts: 2,172
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Re: 6SJ7 anode current
Well, I decided to change the offending eq section and reconfigured it to one from a Fender Blues Deville circuit, so the screaming RF oscillation is now gone
 This works ok except for not getting any bass lift, only cut, maybe I've wired it wrong? An added bonus is it's now has a mid cut/lift option. As to the mystery 6SJ7 12V anode, I dont know, as the amp seems to have lots of volume? I may well employ Lawrence's component values but as it stands I want rid of the  thing ! Many thanks again to all 
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