Vintage Asylum

Posted by Eli Duttman (A) on April 27, 2010 at 19:16:29

In Reply to: RE: No, but it's been done more or less, with the related 6GH8A posted by Bambi B on April 27, 2010 at 09:05:39

Bambi,

There are more replacement driver boards for the ST70 than you can shake a stick at. FWIW, I lean towards Triode Electronic's board populated with 2X EF86s and an ECC99. TE's board retains Hafler's pentode voltage amplifier DC coupled to "concertina" phase splitter topology, but uses in production types that have electrical performance superior to that of the sections found in an 7199.

Eli D.