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[AMPS] Mirage Amp Modification

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Subject: [AMPS] Mirage Amp Modification
From: (
Date: Sun, 21 Feb 1999 10:21:16 -0500

On Sat, 20 Feb 1999 20:56:30 -0500 "frank ayers jr" <>
>I have a couple of Mirage bricks that I am thinking of using as 
>Problem is that they would be run about half rated output. Anybody 
>success in adding an active bias circuit to get the IMD out of the 
>digit range?

Fred, N1DPM, wrote an excellent active bias mod in the NE VHF/UHF
proceedings a few years ago. Two cheap transistors and a few other parts.
Send me a large SASE and .55 postage for a copy.
Ive made the mod in Mirage, RFC, TE and THP bricks and it works real

73  Carl  KM1H

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