[Boatanchors] Re: Midland Model 23-126 Standing Wave Bridge

[Dick KF4NS]

Ken,
It could also be that someone soldered one of the diodes in backwards. 
Sounds crazy but it happens.
GL es 73, Dick KF4NS
St Petersburg, FL 33714 USA
Keep The Glow!

> ------------------------------
>
> Message: 2
> Date: Mon, 18 Jun 2007 09:59:10 -0700
> From: "Ken" <n5cm at rtconline.com>
> Subject: [Boatanchors] Weirdo!
> To: <boatanchors at mailman.qth.net>, <boatanchors at theporch.com>
> Message-ID: <000901c7b1c9$fe4dc180$6b9c1f45 at rtconline.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Fellows,
>
> Here is one for the books! I don't begin to try to explain it. You 
> figgure
> it out!
>
> My Midland Model 23-126 Standing Wave Bridge quit reading reflected 
> power!
> In "Forward" it adjusts ok but when I switch to "Reflected" the 
> needle goes
> to
> about midscale and remains there regardless.
>
> I discovered by experimenting, that in Forward if I dipped the two 
> tuning
> condensers on the Johnson Antenna Tuner, not the KW model, the 
> signal
> reported was good, best I had been getting.
> By bringing the needle up with the adjust potentiometer and then 
> dipping,
>
> stations report my signal up and good. The transmitter is a Central
> Electronics
> 100V.
> Reminds me of "dipping the final plate on an amplifier".
>
> Something in the SWR Bridge circuit has changed that results in this 
> weird
> effect I presume. It is not acting like a field strength meter which 
> you
> would
> tune for maximum reading!
>
> Puzzled! Take care,
>
> Ken   N5CM
>