Just wonder what/who the unbalanced analyser will influence the test results?
-----Original Message-----
From: Richard (Rick) Karlquist <richard@karlquist.com>
To: Hans Hammarquist <hanslg@aol.com>; towertalk <towertalk@contesting.com>
Sent: Tue, Jun 21, 2016 9:43 pm
Subject: Re: [TowerTalk] Fwd: Fwd: Fwd: Fwd: Fwd: OWAs or Fans?
You can model the insulation on the wire.
It would typically cause a 5% decrease in
Zo, not enough to explain the discrepancy.
The distance above ground has nothing to
do with the error caused by using an
unbalanced meter.
Rick N6RK
On 6/21/2016 1:56 PM, Hans Hammarquist via TowerTalk wrote:
> Could be true. I also should have added that the 14 awg wire has some
> insulation and, I don't know if this matter, is twister multiwire. I don't
> remember what the wire is called but it is used as "hook-up" wire in
> equipment. The "unbalanced network analyzer" is probably of stronger
> influence but I just made it to see roughly where it was. It really was not
> of importance for me as I didn't know the exact feedpoint impedance and was
> planning to use a tuner anyhow.
>
>
> I didn't think the balanced to unbalanced could be of that much importance as
> the feeder was several (~10) d - d distances above ground when tested.
>
>
> Hans - N2JFS
>
>
>
> -----Original Message-----
> From: Richard (Rick) Karlquist <richard@karlquist.com>
> To: Hans Hammarquist <hanslg@aol.com>; towertalk <towertalk@contesting.com>
> Sent: Tue, Jun 21, 2016 2:45 pm
> Subject: Re: [TowerTalk] Fwd: Fwd: Fwd: Fwd: OWAs or Fans?
>
> My calculation of that line works out to 579 ohms.
> Something doesn't add up here. Probably explained
> by trying to measure a balanced line with an
> unbalanced network analyzer. Or using a balun
> you haven't calibrated out.
>
> Rick N6RK
>
> On 6/21/2016 10:44 AM, Hans Hammarquist via TowerTalk wrote:
>> Sorry Ed,
>>
>>
>> My feed line is an open wire, 14 AWG with a 4" spacing. I believe it have a
>> Zo of about 400 ohm (I tested it by putting a 390 ohm resistor at the end
>> and watching the SWR as a function of the frequency.) I made the line myself.
>>
>>
>> Hans - N2JFS
>>
>>
>>
>> -----Original Message-----
>> From: Edward McCann <edwmccann@yahoo.com>
>> To: Hans Hammarquist <hanslg@aol.com>
>> Sent: Mon, Jun 20, 2016 11:36 pm
>> Subject: Re: [TowerTalk] Fwd: Fwd: Fwd: OWAs or Fans?
>>
>> And Hans,
>>
>> Your feedline is not described in your response. While I am assuming it is
>> ladder or open wire feed, wound you mind being a bit more specific: maker,
>> model number, impedance, etc.
>>
>> Thanks,
>> AG6CX
>>
>>
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>
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