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Wally · April 10th, 2008, 12:57 PM

The 5F6A does not have the swamper resistors between the grids of the power tubes. The 5F6 uses a 25mfd bypass cab on the cathode of V2 whereas the 5F6A does not have this cap...in the schematic anyway. The swamper resistor is the biggest sonic change, I think. The two rectifiers are both about as close to SS rectification as you can get with a tube....virtually no sag.

April 10th, 2008, 12:57 PM	#21 (permalink)
Wally Friend of Leo's Join Date: Mar 2003 Location: Lubbock, TX Posts: 3,625	The 5F6A does not have the swamper resistors between the grids of the power tubes. The 5F6 uses a 25mfd bypass cab on the cathode of V2 whereas the 5F6A does not have this cap...in the schematic anyway. The swamper resistor is the biggest sonic change, I think. The two rectifiers are both about as close to SS rectification as you can get with a tube....virtually no sag.