[SMIRK] 6M Homebrew Amplifier for sale

Bill Cotter n4lg at qx.net
Sun May 15 13:37:32 EDT 2011


For sale is a homebrew 6M 250W+ linear amplifier.

I took this amplifier out of service after completing the 
modifications to my SB-200 for 6M. I purchased this amplifier a 
couple of years ago and used it from time-to-time when the TS-60 
barefoot was marginal. It requires about 5-10W drive to get the 
full 250W output. The only issue I am aware of are the missing 
Millen HV caps on the HV PS-to-Amplifier cable (see pix).

The present tube is an Eimac Y-391, a military specified and tested 
variation of the 4CX300A tube. The socket is the SK-700. With a 
socket replacement the amplifier could accommodate the 4CX250B, 
4CX150, 3CX800 or any of the available Russian tubes.

The original circuit was a derivative of the 6M amplifier designs 
from the 1957 and 1962 ARRL Handbooks.

http://web.qx.net/bcotter/forsale/6M%20250W%20Amplifier/

Price is $275 plus shipping from 40356. Combined weight is about 
50lbs. Will be shipped in two cartons.

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Terms and understanding: This is a homebrew amplifier meaning that 
is not a commercially supported product. There is no warranty or 
guarantee, what you see is what you get. And, this amplifier can be 
lethal if you fail to observe ALL safety precautions.



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