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Old 2nd March 2012, 03:04 PM   #1
john65b is offline john65b  United States
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Default FS: DIY EL34 / 6SN7 Tube Amp

Hey all,

After acquiring my ARC Dual-75 Amp, I have no need for this DIY amp I have had for past 6 years (a friend of a friend originally built it)...It has gone through a number of mods and tweaks as listed below. Amp is very quiet, and currently has new EH EL34 tubes in it. I can sub either a quad of Chinese KT88, GE 6550, or EH 6L6GCs if the EL34s are not preferred (you will have to swap the appropriate Cathode Bias Resistor and other components to suit)

Very heavy duty and clean chassis
Pair of Hammond 1650N output trannies
Pair of unknown Mil Spec Power transformers that put out in excess of 450V on secondaries
Pair of Thordarson Inductors (serial #422742?) and PS currently set up for Choke Input, with B+ at 320VDC...tweak first cap to dial in you B+...CLCRCRC
Pair of 5R4GYB rectifiers (RCA?)
Pair of Tung Sol 6SN7
All filaments on AC, but very quiet.
Illuminated Switches on front are for switching feedback on/off

A bit of a rats nest, but never messed with it much as it was so quiet...

How's $550? I am in Chicago and pick up preferred, as this thing weighs over 60 pounds and will not be cheap to ship...
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Last edited by john65b; 2nd March 2012 at 03:07 PM.
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Old 7th March 2012, 05:14 PM   #2
john65b is offline john65b  United States
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$500? Parts are worth more than asking price...
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Old 12th March 2012, 02:02 AM   #3
john65b is offline john65b  United States
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