[BC] unreliable old equipment query

[Ron Youvan]

   Gary K0CK Peterson wrote:

> I recall seeing a commercially made, high end
> audio amplifier that used a pair of 6550s in
> push-pull.  The chassis was chrome or nickel
> plated.  I don't recall the brand.

   The KT88, KT90, and 6550, although not identical, are often interchangeable

   from:  http://en.wikipedia.org/wiki/6550

   I'm sure many amplifiers were designed around KT88s & KT90s.

-- 
Ron KA4INM