Greetings:

We recently acquired materials from the estate of Roger A. Jacobsen,
K9KLN, which included a nice Quad 837 tube linear for 80m - 20m(?).
Please look at this amp at:

http://ipx1.cybertheque.net/ham/837_linear/

I would appreciate any recollections about the design, chassis
layout, performance and similarities to other 807/1625 grounded-
grid designs.

Regards,

Michael Grigoni
Cybertheque Museum