[Amps] Ameritron AL-811 (3 tube model)

[R.Measures]

On Dec 24, 2005, at 12:39 PM, jsb at digistar.com wrote:

>
> hi,
>
> I've got an AL-811 with a bad relay.  Just wondering if anyone knew the
> part # and how I go about getting another?  I bypassed the relay with
> jumper wire and alligator clips and it works fine. I believe the 
> contact
> pad for the side that connects to the "RF Out" jack is ruined.
>
A conventional relay is too slow to keep up with a modern radio, so the 
contacts hot-switch.  The long term fix may be to install high-speed 
switching.
http://www.somis.org/D-a-07B.jpg
Another source of hot-switching is the AL-811's RF actuated switching 
since the relay does not start to switch from Rx to Tx until RF is 
already coming down the pipe.   The fix for this is to allow the radio 
to control the amplifier relay.

cheerz, Jason.

> The guy who gave it to me (free) said it couldn't be fixed but it
> apparently is fixable if it's just the relay ;-)
>
> thanks
>
> --
> 73 Jason N1SU
> http://n1su.com/
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>

Richard L. Measures, AG6K, 805.386.3734.  www.somis.org