Fern,
It may be unnecessary but certainly prudent to use an amplifier
interface box such as an Ameritron ARB-704. It can prevent a lot of
heartbreak.
On Wed, Nov 13, 2019 at 1:10 PM Jim Thomson <jim.thom@telus.net> wrote:
> Date: Tue, 12 Nov 2019 20:52:37 -0700
> From: "Fern Rivard" <crc@cyberlink.ca>
> To: "Amplifiers" <Amps@contesting.com>
> Subject: [Amps] re interfacing IC-706 to alpha 9500
>
> <I want to interface my Icom IC-706 M II G to my alpha 9500 amplifier.
> <I have the OPC-599 adapter cable c/w an eight pin male plug to into the
> ACC2
> <connector.
> <Which option should I use on ACC2, pin #3 Hsend or pin #6 Vsend and can
> I
> <safely use that without anything else in line?
> <73 from Fern VE7GZ
>
> ## To get around the overshoot / spike problem, try this method.
> 9V battery wired to the far ends of a 1 megohm pot. Wiper of pot
> goes to ALC input on ICOM. Wiper then will have 0-9 vdc
> applied to the ALC jack. Wiper must be negative, so negative of
> battery to top of pot.... and positive of battery to bottom of
> pot.
>
> ## Positive of battery / bottom of pot also bonds to chassis of
> radio.
>
> ## easy to do with just the usual male RCA connector on a length
> of cable,
> like 58-u... or 174-u . Power consumption is zilch.
>
> ## set PO on radio to say 70-100 watts. Tweak 1 meg pot
> for desired
> PO.... like 50 watts. Scream all u want, it wont exceed 50
> watts. It cant.
> You have already developed the ALC vdc...externally....and its
> applied
> continuously. No spikes, no overshoots. End of issue.
>
> Jim VE7RF
>
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--
Later,
John Bodine/WU2E
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