Steve,
What radio are you using to drive the amp? Are you using ALC? Sounds like power
setting on radio is such you see the higher power until ALC drops exciter power.
Dave wo2x
Sent from my iPad
> On Sep 16, 2019, at 10:58 AM, Stephen Rabinowitz wrote:
>
> Many thanks to all of those who
On 9/16/2019 4:42 AM, Michael Walker wrote:
I only post stuff on this reflector so Jim can tear me a new one.
Nothing personal. I only try to correct flawed ideas.
73, Jim K9YC
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Many thanks to all of those who responded to my message and shared their
experiences and thoughts: Dave WO2X, Mike VA3MW, Bob K4TAX, Jim K9YC, Victor
4X6GP, and Alan N1AL. With a dummy antenna (Cantenna) on 7MHz, and a 1.1:1
match, using 10w drive the KPA-1500 puts out 605w at first, then settles
t; >>>> antenna is close to something causing it to arc over. I had one
> antenna
> >>>> that
> >>>> used ladder line with solid conductors. Due to it moving around in
> the wind
> >>>> one of the conductors developed a break which tested fine under l
wo2x
-Original Message-
From: elecraft-boun...@mailman.qth.net
On
Behalf Of Stephen Rabinowitz
Sent: Sunday, September 15, 2019 7:58 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Reflected power
My KPA-1500 switches from operate to standby due to reflected power more
than 200w
I disagree, Vic. He said "the return currents are higher." SWR describes
what is going on INSIDE the transmission line -- the differential
current. Common mode current is OUTSIDE the coax (or, in the case of
2-wire line, the difference between the current on the two conductors.
Now, common
yzer but would have problems at higher power. I've since moved
>>> to Davis RF copper clad stranded ladder line.
>>>
>>> Dave wo2x
>>>
>>>
>>>
>>>
>>> -Original Message-
>>> From: elecraft-boun...@mailman.
power. I've since moved
to Davis RF copper clad stranded ladder line.
Dave wo2x
-Original Message-
From: elecraft-boun...@mailman.qth.net
On
Behalf Of Stephen Rabinowitz
Sent: Sunday, September 15, 2019 7:58 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Reflected power
My KPA-1500
ed ladder line.
>
> Dave wo2x
>
>
>
>
> -Original Message-
> From: elecraft-boun...@mailman.qth.net
> On
> Behalf Of Stephen Rabinowitz
> Sent: Sunday, September 15, 2019 7:58 PM
> To: elecraft@mailman.qth.net
> Subject: [Elecraft] Reflected power
&g
@mailman.qth.net
Subject: [Elecraft] Reflected power
My KPA-1500 switches from operate to standby due to reflected power more
than 200w whenever drive power exceeds about 8 watts on 7 MHz. The forward
power at that point is about 400w. The antenna is a double bazooka that
shows an SWR of about 1.2
My KPA-1500 switches from operate to standby due to reflected power more
than 200w whenever drive power exceeds about 8 watts on 7 MHz. The forward
power at that point is about 400w. The antenna is a double bazooka that
shows an SWR of about 1.2 on a RigExpert AA-230Pro antenna analyzer. A
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