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70's SB12 OT wiring

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70's SB12 OT wiring
Steelyman Offline
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Posts: 10
Threads: 2
Joined: Jun 2014
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#2
06-27-2015, 07:02 AM
I suspect the amp is oscillating. Swap the the brown and blue wires from the OT at Pins 3 on the power tube sockets. Volume drops off alot cuz most of the power is being used to amplify the oscillation. Reattach the negative fb wire.
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Messages In This Thread
70's SB12 OT wiring - by freeformfx - 06-24-2015, 12:03 PM
RE: 70's SB12 OT wiring - by Steelyman - 06-27-2015, 07:02 AM
RE: 70's SB12 OT wiring - by freeformfx - 06-29-2015, 11:39 AM
RE: 70's SB12 OT wiring - by Steelyman - 06-29-2015, 03:45 PM
RE: 70's SB12 OT wiring - by freeformfx - 07-07-2015, 06:53 PM

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