[ETO_Alpha] 87A problem

Thu, 30 Jan 2003 10:54:46 -0500

Dear Rag, et. al.,
    I think Alpha fixed that problem with the 89 and 87A after having
problems with the 86 model.  You may have low bias on the pin diodes like
the 86.  I would check with Alpha and or AA0RS before going to a vacuum
relay system.  However, if you hate pin diodes have at it.  I would try to
use the diodes from the Alpha 77 circuits at 24 volts if you can make a QSK
circuit board.
    Good luck        73        George    K8GG

----- Original Message -----
From: "Ragnar Otterstad" <[email protected]>
To: <[email protected]>
Sent: Wednesday, January 01, 2003 10:14 PM
Subject: [ETO_Alpha] 87A problem


> MY 87A has a reliability problem, i.e. the PIN diodes break down too
> frequently.
>
> Has somebody done a vacuum-relay modification to solvethe PIN diode
problem
> once and for all ?
>
> 73   HNY
>
> Rag Otterstad    LA5HE also JW5HE OZ8RO
> located in Telemark - home of skiing.
>
> My antenna "farm" can be found on HTTP://no.photos.yahoo.com/la5he when
you
> click on  Radio.
>
>
> Take a look at: http://WWW.visitTelemark.com
>
> or  http://www.visitnorway.com
>
>
>
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