"
To:
Sent: Friday, November 20, 2009 4:24 PM
Subject: Re: [Elecraft] BL-2 Balun Heating
> Thanks for all the advise! I've been running tests all day to which I
> have a nice Excel spreadsheet. I've run the tests on 160 thru 10 meters
> using my trusty MFJ-259B (couldn'
Gary,
Those two 80 foot 'counterpoises' are doing you no good at all.
run some wires off the ground and insulate the ends, cut each one to be
a 1/4 wavelength at a band of interest. If you have to run them in a
bundle, keep the ends of the shorter ones separated from the rest of the
wires by a
Thanks for all the advise! I've been running tests all day to which I
have a nice Excel spreadsheet. I've run the tests on 160 thru 10 meters
using my trusty MFJ-259B (couldn't live without it). I ran AT1KM - no
balun, BL-2 1:1, BL-2 4:1 and a W2AU bead balun 1:1, all thru the
AT1KM. All S
"Thanks to everyone that replied to my situation. Looks like I'll be
busy doing a lot of testing and experimenting today. I'll get back with
the results later."
Gary N2UM
I hope that will include the suggestion of placing the balun between the rig
and tuner, just so you can report back on
Thanks to everyone that replied to my situation. Looks like I'll be
busy doing a lot of testing and experimenting today. I'll get back with
the results later.
Gary N2UM
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ld be asking a
lot of it.
I quote the BL2 manual:
"Power Rating 250 watts with a MATCHED LOAD". Your load is far from matched.
73
Steve
N4LQ
n...@carolina.rr.com
- Original Message -
From: "Ron D'Eau Claire"
To: ;
Sent: Thursday, November 19, 2009 11:32 PM
Subj
Yes, you are reaching the "curie temperature" of the core. At that point
it's magnetic properties change dramatically.
Of course that heat comes from RF that is becoming heat instead of being
radiated by the antenna. A bigger core isn't the answer. You'd still be
losing the same amount of power e
PS
I believe the BL-2 is rated at 150 watts so running at 125W is already
at the limit even when it is placed in the ideal point in the circuit
... (50 ohms resistive). Place it in a point in the circuit where the
resistance varies up or down from the ideal of 50 ohms and then make
At 10:02 PM 11/19/2009 -0500, you wrote:
>I recently built a BL-2 Balun. It is connected between my Palstar AT1KM
>tuner and my doublet antenna. The antenna consists of a 100' wire up
>25' and fed by 95' of 600 ohm open wire feeder. I'm using the 1:1
>setting on the balun. There is a 4" section
reasonably close to 50-ohms at the balun.
Paul, W9AC
- Original Message -
From: "Gary Winkelman"
To:
Sent: Thursday, November 19, 2009 10:02 PM
Subject: [Elecraft] BL-2 Balun Heating
>I recently built a BL-2 Balun. It is connected between my Palstar AT1KM
> tune
Gary,
Balun heating is normally caused by attempting to feed a very high or
very low impedance.
Have you tried the 4:1 position? It may help, so do try it even though
I would believe the antenna system feedpoint impedance where the balun
is connected may be in the range of thousands of ohms ra
I recently built a BL-2 Balun. It is connected between my Palstar AT1KM
tuner and my doublet antenna. The antenna consists of a 100' wire up
25' and fed by 95' of 600 ohm open wire feeder. I'm using the 1:1
setting on the balun. There is a 4" section of RG-213 between the balun
and a coax i
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