[Elecraft] Using Dual Switched Radios with KAT500 Tuner

[Phil Hystad]

Jack,

Switching using a CX-210 manual switch.  

By cutting power, you mean cutting back to low power for tuning right?  

I assume with the KAT500 running in manual mode, which is the way I use it now with the K3, I will not have the problem of auto-tune going into action while I am transmitting.

73, phil, K7PEH


> On Nov 28, 2016, at 7:51 PM, Jack Brindle <jackbrindle at me.com> wrote:
> 
> Phil;
> 
> How would you switch between the radios? Manual switch?
> Be sure you also connect that you provide some method for cutting power on the transmitter when the KAT is tuning. This is built into the K3/KPA setup, but you also need to do it for the IC706.
> You really don’t want to hot-switch the KAT500’s relays at 100 watts+. It would greatly shorten their life.
> 
> - Jack, W6FB
> 
>> On Nov 28, 2016, at 6:06 PM, Phil Hystad <phystad at mac.com> wrote:
>> 
>>> < quoted from Jim Cox K4JAF>
>>> Main question I have:  Why would you want to use the 706 on HF when you have the K3?
>> 
>> I suppose the most direct and honest answer is “because I want to”.  Actually, the 706 is sort of my backup radio if I ever need a backup radio.  And, I have a tendency to use my backup radio a couple of times per month just as a means of exercising it.  Right now, the antenna tuner I use with the 706 is a manual Palstar AT1KM which is bulky and takes up room on the desk.  I want to get rid of it.  Making dual use of the KAT500 would be a nice solution to getting rid of the AT1KM.
>> 
>> I also own a KX3 but I use it for portable QRP ops only — it does not have an external amplifier.
>> 
>>> I think the 706 covered 2 meters?  Hook the 2 meter antenna to it and use it there..
>> 
>> Of all the 2-meter solutions I have already, the 706 would be my last to use.  2-meters on the 706 is a hassle.
>> However, I do next to zero 2-meter work so a moot point.  I have a 2-meter Yaesu FM transceiver as well as the 2-meter option on the KX3,   and two Yaesu 2-meter capable HTs.
>> 
>> 
>> 73, phil, K7PEH
>> 
>>> 
>> 
>> 
>> 
>>> -----Original Message----- From: Phil Hystad
>>> Sent: Monday, November 28, 2016 7:13 PM
>>> To: Elecraft Reflector Reflector
>>> Subject: [Elecraft] Using Dual Switched Radios with KAT500 Tuner
>>> 
>>> I would like to consider using my KAT500 tuner in a configuration switched between two radios.  One of them is my K3 and the other is my Icom 706.
>>> 
>>> My normal configuration is a full K-Line:
>>> 
>>>      K3/P3 —> KPA500 —> KAT500 —> Antennas
>>> 
>>> This K-Line configuration is by the book full Elecraft cabling setup.
>>> 
>>> My alternate configuration is the Icom IC-706:
>>> 
>>>       IC-706  —> KAT500 —> Antennas
>>> 
>>> No amplifier in this configuration.
>>> 
>>> My first thought is that my 706 will be RF connected to the KAT500 only — no other cabling as I am using with the K-Line.  While using the 706 the K3/P3-KPA500 will be switched off (front panel switch for KPA500).
>>> 
>>> I am thinking of using RF sensing for the frequency, band detection and thus switching to the right antenna by the KAT500 but I am not sure if this will work.  Manually switching is OK but would rather make use of auto-switched by KAT500.
>>> 
>>> Advice??  Is there anything wrong with this idea and my operating plan with the 706?  All cabling RF/Digital between K-Line and KAT500 will be left connected with the exception that RF input is actually physically switched between the K-Line and the 706 (only one connected to KAT500 at a time).
>>> 
>>> 73, phil, K7PEH
>>> 
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>> 
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