Garey Barrell <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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Bias supply failure! Should be adjustable from about -45 to -85 VDC.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B & C-Line Service Supplement CDs
<www.k4oah.com>
Ken Bessler wrote:
Ken Bessler <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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Date: Mon, 12 Nov 2007 13:39:48 -0500
From: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Subject: Re: [drakelist] Deaf TR4
Garey Barrell made an utterance to the drakelist gang
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Ken -
More likely a Bias supply failure. Probably a shorted electrolytic
capacitor in the AC-4.
The Bias supply should read approximately -65 VDC at the transceiver.
Most all the AC-4 power supply filter caps are years past their life
expectancy and are just waiting for the most inopportune time to die!
The AC-4R board/kit from Mike Bryce at the Heathkitshop is the ideal way
to deal with the problem, and set your supply to work for the next 30 years.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B & C-Line Service Supplement CDs
I measure -26.63Vdc at pin 9....
Ken
73's de Ken KG0WX - Kadiddlehopper #11808,
Flying Pigs #-1055, Grid EM17ip
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