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Re: [Amps] Amps Digest, Vol 104, Issue 41

To: amps@contesting.com
Subject: Re: [Amps] Amps Digest, Vol 104, Issue 41
From: Holger Gatternig <holger@gatternig.com>
Date: Mon, 29 Aug 2011 22:05:14 +0200
List-post: <amps@contesting.com">mailto:amps@contesting.com>
Hello Bob,

do you have some pictures from these motorized pretuning units and the amp?
i have 2 semi automatic kw amps here witch were built for the russian 
military.
At the moment they are not modified for amateur use.


73 de Holger, OE9GHV

Am 27.08.2011 21:00, schrieb amps-request@contesting.com:
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 27 Aug 2011 13:35:27 +0200
> From: "Bob"<bobt@iafrica.com>
> Subject: [Amps] Russian pre-tuning units
> To:<amps@contesting.com>
> Message-ID:<000f01cc64ad$6de425d0$49ac7170$@com>
> Content-Type: text/plain;     charset="us-ascii"
>
> Hi to the group,
>
>                          This is my first post so a little about myself
> first, I'm an electrical engineer who plays with very big drives(1 ~11MW
> size) I live in South Africa and have the call ZS6BXI which I have held for
> ~ 25 years. I operate a flex 5000A and have purchased a home brew linear
> based on a GU 43B. This was built by an east European /Russian Ham and
> brought to South Africa for a DX expedition and never went home (it was too
> heavy). The amp and its separate power supply work fine (although it's had a
> hard life and I have been doing a lot of tidy up work, tightening up all of
> the bolts and renewing frayed wiring etc).
>
> My problem is the two pre-tuning units that pre-position the tune and load
> caps for each band. They appear to be Russian Military and are very neat and
> built like a Swiss watch. But one doesn't work and I would like to know how
> it works and be able to fix it and some details on how to set it up. It
> appears to be motor driven has a set of logic input selectors driven from
> the band selector switch but with lots of tiny cams and switches.
>
> Please has anyone come across these units before and if so can they help.
>
>
>
> Regards Bob ZS6BXI
>
>

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