[ADXA] stack match blues

[Jussi Eloranta]

Hi,

OK, Ken at JK Antennas solved the problem. I added about 2m of coax 
between the amp and the stack match. Ken's response was:

"This is more a reactance issue. Try a longer or shorter coax jumper and 
it can soften it."

SWR is now 1.6 and pleases the eye at least.

Jussi (aa6kj)

On 11/13/25 08:07, Charles McKenzie wrote:
> Jussi, drop a phone message or email to the old array solutions 
> contact info. Jay said he would be around for a while, I spoke to him 
> about 6 mo ago concerning above ground 4 sq radials.
> 73
> KF5TL
> Sent from my iPhone
>
>> On Nov 13, 2025, at 7:43 AM, Charles Korzendorfer 
>> <korzendorferc at gmail.com> wrote:
>>
>> 
>> Jussi,
>>   I have a Stack Match II model as well.  My experience has been that 
>> the SWR is best when both antennas are engaged.  I have never heard 
>> of the problem you are experiencing.
>> Chuck
>>
>> On Thu, Nov 13, 2025 at 7:16 AM BILL KENNAMER <k5fuv at prodigy.net> wrote:
>>
>>     It’s been 25 years since I last used mine, but I never had any
>>     problem like that. Both or separate seemed the same except it
>>     went up very slightly when the antennas were in two different
>>     directions.
>>
>>     FUV
>>
>>
>>     Sent from AT&T Yahoo Mail for iPad
>>     <https://more.att.com/currently/imap>
>>
>>     On Wednesday, November 12, 2025, 6:31 PM, Jussi Eloranta
>>     <eloranta at aa6kj.hopto.org> wrote:
>>
>>         It is their two antenna one. The third tribander is still on
>>         the wish list. Hamation.com is the guy nowadays producing &
>>         selling them.
>>
>>         Jussi
>>
>>
>>         Nov 12, 2025 5:28:38 PM w5znjoel at gmail.com:
>>
>>             More than I care to admit.
>>
>>             I don't recognize "SM-2" in particular. Is this the three
>>             antenna StackMatch
>>             or two antennas?
>>
>>             73 Joel W5ZN / ZF2ZN
>>
>>             -----Original Message-----
>>             From: adxa-bounces at mailman.qth.net
>>             <adxa-bounces at mailman.qth.net> On Behalf
>>             Of Jussi Eloranta
>>             Sent: Wednesday, November 12, 2025 5:14 PM
>>             To: 'ADXA' <adxa at mailman.qth.net>
>>             Subject: [ADXA] stack match blues
>>
>>             Hi,
>>
>>             Does anyone have experience with array solutions (now
>>             hamation) stack
>>             matches (SM-2 in particular)? I am running into strange
>>             problem on 20m where
>>             the individual antenna SWRs are around 1.5 but when the
>>             stack match kicks in
>>             the SWR jumps to 2.1. That is still kind of tolerable but
>>             I would definitely
>>             like to find out why this is happening. It behaves
>>             normally on 15m and 10m.
>>
>>             Jussi (aa6kj)
>>
>>
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