[Amps] Switching between two amplifiers

[David Gow]

I went a different route.  I made a simple patch panel.  It was
easy because I used bulkhead connectors for input, output, and relay  so no
soldering, just cables on each side.  Relays are RCA,  inputs are BNC and
outputs are quick change SO-239. (available from Amazon and have handled
legal limit just fine for years.  No way to make a dangerous connection and
takes less than 30 seconds to change. Picture on request.  I use it to
switch my ALS-1306 and my legal limit Henry.
Dave W7VM

On Sat, Apr 3, 2021 at 10:59 AM Jim Thomson <jim.thom at telus.net> wrote:

> Date: Sat, 3 Apr 2021 12:54:29 +0000 (UTC)
> From: Dick NY1E <dick at ny1e.com>
> To: "amps at contesting.com" <amps at contesting.com>
> Subject: [Amps] Switching between two amplifiers
>
> <I want to? switch between using my homebrew amp or a TL-922A, I could use
> a pair of coax switches, but would like a single knob to eliminate operator
> error! What are others using to do this? de Dick NY1E
>
> ##  I wire the  amps  nose to tail...in series.   BUT  that requires the
> TR relays in both  amps to be able to handle full  power..on  bypass mode.
>
> ##  I have wired as many as  4 x drake L4Bs in series.    Key line from
> xcvr goes to the common of a small rotary switch. ...then a key line cable
> to each amp.   Every 2nd position on the rotary switch is for an amp. The
> un used positions
> on the  rotary switch are for bypass, aka  standby positions.   Its a
> simple mech interlock, that ensures only ONE amp can be keyed at one time.
>  Then tune up the various amps for  cw and ssb on same band, or  4 x
> different bands,
> or any combo u can think of.
>
> ##  Same deal on the HB  amps that use vac relays.
>
> Jim   VE7RF
>
>
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