http://elecraft.85.s1.nabble.com/KPA500-and-KAT500-Ports-tp6574422p6576266.html
The KAT500 as designed currently has two antenna outputs. The second one
> Hello Eric and others,
>
> Business is business. While KPA500+KAT500 should first look after the elecrafters, they should be designed in a way to attract other non-elecraft radio users. In the circumstances, 2 exciters input + some 2-3 antenna outputs in KAT500 should be attractive enough to many radio users. Or, I would say this requirement is simply basic and has already been available for other reputable linear amplifiers.
>
> If so unfortunate that KAT500 only has one RF input + one antenna output, I am afraid that I have to consider other alternatives.
>
> I can add whatever after market switches to provide the extra antenna selection. However, it is just simply not convenient and another mess of cabling around the shack.
>
> TNX& 73,
>
>
> Johnny VR2XMC
>
> 從︰ Eric Tichansky NO3M<
[hidden email]>
> 收件人︰
[hidden email]
> 傳送日期︰ 2011年07月13日 (週三) 12:04 AM
> 主題︰ Re: [Elecraft] KPA500 and KAT500 Ports
>
> Another very reasonable switch for the "kit" builder:
>
http://home.comcast.net/~kk1l/kk1l_2x6switch/>
> I trunk three of those from an old Sixpack for up to 18 antennas
> (still have 4 unused slots!) and they've worked flawlessly.
> Total cost of PCB, parts, and LMB Heeger aluminum box was perhaps
> around $145.
>
> - eric NO3M
>
> On 07/12/11 11:01, WILLIS COOKE wrote:
>> You know that Ameritron, Array Solutions and some others have remote antenna
>> switches available at reasonable prices. Since these things take space, it is
>> nice that they can be remote mounted, even outside in some cases. It seems a
>> better solution to me than to add a kilobuck to the KPA500 price and make it the
>> size of a small refrigerator when the requirements vary from person to person
>> and the chance of pleasing more than a small portion of the users is small. I
>> prefer the small box that is possible to take on a DXpedition or to Field Day
>> and just endure the horrible pain of changing the coax when you change bands.
>> The main thing that discourages me from buying an eight pack from Array is that
>> I don't have enough antennas to keep it from being lonesome.
>>
>> Willis 'Cookie' Cooke
>> K5EWJ& Trustee N5BPS, USS Cavalla, USS Stewart
>>
>>
>>
>>
>> ________________________________
>> From: Eric<
[hidden email]>
>> To:
[hidden email]
>> Sent: Tue, July 12, 2011 4:57:10 AM
>> Subject: [Elecraft] KPA500 and KAT500 Ports
>>
>> Elecrafters, Hear My Plea:
>>
>> The K3 has two tx antenna ports available. It seems logical to me that the
>> KPA500 would have two (output) as well. But it doesn't. I would like to see the
>> KAT500 have two antenna ports (unbalanced) to make up for this. Running the 6m
>> output to another coax makes sense--most (all?) band decoders and relay boxes
>> don't handle 6m, and the lack of a second output port on the KPA500 makes it
>> difficult to manage the 6m capability of the K3 cleanly. The KRC2 will handle
>> the band data, but does not have a compatible relay box, manual operation, or
>> lights to tell you what it is doing.
>>
>>
>> Right now my K3 sends HF to ANT1, that goes to an HF amp and to a TopTen band
>> decoder and relay box. Six meters goes to ANT2 and a separate 6m amp and 6m
>> antenna.
>>
>>
>> This gives me fully auto bandswitching on HF and 6m, save for 60m where the
>> TopTen decoder does not recognize 0000 as a valid address.
>>
>>
>> With my already ordered KPA500
>> (selling both tube amps), I will have to manually switch 6m. I don't like this
>> not because I am lazy, but the older I get the more stoopid I get and its just a
>> matter of time before I tx into a near-infinite SWR. Knowing me, I'll do it
>> repeatedly until something blows. Maybe multiple somethings.
>>
>>
>> I'll have to rely on the KPA500 and K3 saving themselves. Not good.
>>
>> In my squandered pre-K3 life, i put key lockout relays and a sequencer for 2m
>> EME in my system to make it failsafe and STILL blowed up the masthead preamp
>> more times than I can count.
>>
>>
>> In my opinion, the KAT500 needs two unbalanced outputs, bandmapped, for nice
>> tight integration with the K3, to keep things as elegant as possible. I have no
>> opinion on balanced output(s).
>>
>>
>> No flames please. This is just my opinion--I could be wrong.
>>
>> 73 Eric WD6DBM
>>
>> K1, KX1, K2, K3, P3, XG3, all mini modules, Elecraft Kool-Aid I-V push STAT!
>>
>> KPA500 still a mere glimmer at Elecraft
>>
>> Sent from my&$@!? iPhone
>> ______________________________________________________________
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