[Elecraft] K2 Improvement Ideas--Adding on

[Don Wilhelm]

Bob,

I think you may be a candidate for the KRC2 and an array of relays for 
your antenna switching tasks.  It can work great.  When I have all the 
work on my system completed I will switching a total of 13 antennas with 
mine - the tuner just trims up the match a bit when needed.

If you have 2 banks of antennas (1 bank tuned and the other presenting 
50 ohms), the KRC2 can select the proper antennas for each band and the 
ANT1/2 button selects between the 2 antennas for each band - If you have 
more than 2 antennas on any band the KRC2 F4 button can be used to turn 
on the AC1 thru AC3 lines which can be used in conjuction with the 
normal band select outputs to select additional antennas - I find it 
much more sensible and automatic than antenna switches.

73,
Don W3FPR

Robert Tellefsen wrote:
> Hi Don
> Yes, if there were only two antennas, that
> would work., and I've done that.   However,
> I have more than that, some connected to a
> rotary switch outboard to the K2.
> When I switch them, I don't want to
> retune the ATU with each new antenna I
> connect, as I'm often switching to find the
> best signal for a station I'm trying to work.
> Some antennas present a nice 50 ohm match
> as they are, and some don't.  I'd like to put
> the 50 ohm matches all together on one
> port and those that need matching on the
> other port.
> I'm still trying to get to the point where all
> the antennas are 50 ohms at the switch, and
> then it wouldn't matter.  But it ain't easy :-)
> 
> 73, Bob N6WG
> 
> ----- Original Message -----
> From: "Don Wilhelm" <w3fpr at earthlink.net>
> To: "Robert Tellefsen" <n6wg at comcast.net>
> Cc: "Bill Coleman" <aa4lr at arrl.net>; "wayne burdick" <n6kr at elecraft.com>;
> "Elecraft" <elecraft at mailman.qth.net>
> Sent: Friday, May 04, 2007 5:14 AM
> Subject: Re: [Elecraft] K2 Improvement Ideas--Adding on
> 
> 
>> Bob,
>>
>> I see no real need for a bypass on just one of the tuner antenna jacks.
>> In my mind it is already there, but better - just do a TUNE once on each
>> band where your antenna is resonant and the K2 will remember - I regard
>> that as better than a bypass function.
>>
>>
>> 73,
>> Don W3FPR
>>
>> Robert Tellefsen wrote:
>>> Bill
>>> I'd like to add to your list the ability to have the
>>> KAT2 autotuner be active on one antenna port
>>> and be bypassed on the other.
>>>
>>> I have some antennas that require the autotuner
>>> for a match, and others that are already a good
>>> match as they are.
>>>
>>> I'd also like to see an improvement in the cw crystal filter
>>> to improve the signal suppression outside the filter
>>> passband.
>>>
>>> 73, Bob N6WG
> 
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