I bought this from Radiodan on eBay for about $65.
It's actually a buffer box made especially for the older amps with modern rigs.
You run a standard RCA phono cable from the box to your amps (the line to both
are always keyed so you just keep one amp in standby).
http://www.ebay.com/itm/Amplifier-keying-relay-buffer-interface-for-TWO-linear-amp-switching-RBI-2-/140636228603?pt=US_Ham_Radio_Amplifiers&hash=item20be928bfb
I have no interest in the company...just a satisfied customer.
73 Darrell AB2E
> From: n2bc@stny.rr.com
> To: wv2zow@gmail.com
> Date: Thu, 23 Aug 2012 14:41:56 -0400
> CC: amps@contesting.com
> Subject: Re: [Amps] Multiple Amplifier Switching Box
>
> As I said my experience is with the TT Titan. Standby simply cuts off the
> PA and inhibits transmit. If you look at the diagram, you will see a
> capacitive coupled circuit on the RF input BEFORE any TR switching. It's
> job is to prevent hot-switching.
>
>
>
> Even without a 'sniffer' circuit, most QSK implementations use a small fast
> relay on the input. No where near capable of KW levels.
>
>
>
> From: Michael Clarson [mailto:wv2zow@gmail.com]
> Sent: Thursday, August 23, 2012 12:24 PM
> To: n2bc@stny.rr.com
> Cc: Mark Robinson; amps@contesting.com
> Subject: Re: [Amps] Multiple Amplifier Switching Box
>
>
>
> N2BC: Not sure I understand why QSK would be an issue -- if your amp is in
> Standby, you should be able to run exciter through it, correct? You do have
> a point -- one needs to make sure IF series amps are tried, that the bypass
> around the amp can handle another amps full power and not just exciter power
> levels. --Mike, WV2ZOW
>
> On Thu, Aug 23, 2012 at 11:40 AM, N2BC <n2bc@stny.rr.com> wrote:
>
> Amps in series.... not so good. I would guess that most QSK amps have a
> form of RF 'sniffer' on the input to prevent hot switching.
>
> Following a massive brain cramp, I cabled a KWS-1 (600W) through a TenTec
> Titan. Was a bit confused when smoke started to curl out of the Titan & it
> was powered off. Result: charcoal grid circuit.
>
>
> -----Original Message-----
>
> Tessco ( www.tessco.com <http://www.tessco.com/> ) sells RG-400/U in one
> foot increments. If your
> > amps have built in antenna relays, have you considered hooking your
> > amps in series and just switching the PTT line? --
>
>
>
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