[Elecraft] Occasional second radio use with KPA500

[Frank Scolaro]

It's a bit pricey, but I use the 1A2R switch from 4O3A:

https://4o3a.com/1-amp-2-radios-switch

Works great, switches my KPA between two rigs...

Frank, W2YK

On 2/4/2021 1:10 PM, Morgan Bailey wrote:
> I think that here is your answer:
> 
> https://www.dxengineering.com/search/brand/acom/product-line/acom-2s1-automatic-two-transceiver-commutators?autoview=SKU&sortby=Default&sortorder=Ascending
> 
> Granted it is pricey but will probably work for you.
> 
> 73, Morgan NJ8M
> 
> On Thu, Feb 4, 2021 at 10:48 AM Chuck Chandler <chandlerusm at gmail.com>
> wrote:
> 
>> I've been using the K3S, P3, KPA500 and KAT500 as my main radio.  All three
>> antennas are selected by the KAT500.  I also have a second radio, an older
>> Yaesu FT-101ZD.  This rig can be switched into the lineup in place of the
>> K3S.  I sometimes enjoy using the older rig.  In this manner the FT101ZD
>> output goes through the KPA, then the KAT.  I find the KAT plays well, a
>> little tap of the key will cause it to auto-tune.
>>
>> I'd like to be able to use the KPA500 as an amplifier, but so far it won't
>> key.  I've tried the RCA Phono plug into the PA Key jack, but as long as
>> the K3S is connected the KPA won't go into TX without the proper software
>> signal.  I did try with the software keyline interrupter a few months ago,
>> but that prevented the K3S from switching the amp unless I also used a
>> Y-connecter and phono cord from the K3S for amp keying.  When I did the
>> keying didn't seem as crisp, though.
>>
>> The K-Line is all connected as in the diagram on page 5 of the KAT500
>> manual.
>>
>> Ideally, I could turn off the K3S, switch the feedline from the K3S to the
>> 101ZD, and have use of both the tuner and amp.  Is there an easy way to do
>> this?  Perhaps one of those breakout boxes?  Any hints appreciated!
>>
>> 73 de Chuck, WS1L
>>
>> chandlerusm at gmail.com
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