Posted by manualblock [ 24.45.24.101 ] on August 09, 2006 at 12:41:44:
They are winding OPTs for the Eico HF 87/89 series of amps. Very high quality units. DIYTube has a PC board that can use those. It is a duplicate of the Mullard 5-20 amp circuit with a couple minor changes.
Very good sounding PP amps.
[ GroupBuild Forum ] [ Help ]