pinchemotherloaf
Well-known member
I was bored so I decided to go though my leftovers to see what could be made. Came up with, guess what, another 251 type build done in a few hours to see if these Russian 6S6B-V tubes I bought made any sound. Yes they are a bit noisy, but I think my bias is off and the fact I used carbon grid/cap bias resistors did not help either. The other problem was the cheap capsule I put on it has a small tent so It really needs some more work to be functional. Any Bias advise for the 6S6B-V tube would be appreciated! See both my schematic and the original 251. I omitted the 100pF cap at the output. Is this really needed?
Blank Body
Board Installed
Voltage divider and capsule bias resistor placement
Grid dip bias and plate current resistor placements. Other lead is the cathode bias resistor and output cap underneath.
Cathode bias resistor placement
Cathode bias and output caps placed.
Tube placement
Capsule and output transformer placements. 7 pin XLR placed with ground and power leads soldered in place.
Capsule bias capacitor placed as well.
Finished other side.
Familiar Apex body
My circuit kludge. I don't like the wires to cross unconnected like the old schematic!
Blank Body
Board Installed
Voltage divider and capsule bias resistor placement
Grid dip bias and plate current resistor placements. Other lead is the cathode bias resistor and output cap underneath.
Cathode bias resistor placement
Cathode bias and output caps placed.
Tube placement
Capsule and output transformer placements. 7 pin XLR placed with ground and power leads soldered in place.
Capsule bias capacitor placed as well.
Finished other side.
Familiar Apex body
My circuit kludge. I don't like the wires to cross unconnected like the old schematic!
Attachments
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