00100						Computer Science Dept.
00200						Stanford University
00300						Stanford, Calif. 94305
00400						June 20, 1973
00500	
00600	
00700	Mr. Richard Vasak
00800	Glentek, Inc. 
00900	1557 7th Street
01000	Santa Monica, Ca. 90401
01100	
01200	Dear Mr. Vasak:
01300	
01400		Enclosed you will find  our  defective  Power  Amp.    Please
01500	repair  it  at  no  charge per your offer during our recent telephone
01600	conversation.  You can return it directly to the above address.
01700		Failure  occurred  when one side of the power supply was lost
01800	when driving a .75 ohm load. We have experimented with  power  supply
01900	interlocks,  but  now feel that some design changes in your amplifier
02000	could result in a better solution.  Presently, it  is  impossible  to
02100	use this amplifier to drive a current limited load because of lack of
02200	current limiting during turn on (even a few  milliseconds  difference
02300	in  the closing time of a dpst swith on the power supplies results in
02400	damaging current peaks) .
02500	
02600	
02700							Sincerely,
02800	
02900	
03000							Victor Scheinman