Hi Mark,
You will enjoy using your new BSEF receiving array. K1HTV was a big fan of my
BSEF array in the DX contests.
Ask W3UR how he likes it. His T6T topband QSO was made possible by the BSEF
array, impossible to copy on the 900 foot Beverage.
Starting at the top of the photo: http://pvrc.org/bsef/bsef.html
Three inductors in series (two fixed inductors and a toroidal inductor) to set
the resonance to 1830 kHz as measured by an MFJ-259 at the 50 ohm test BNC.
Two resistors in parallel to set the VSWR to 1:1 as measured by an MFJ-259 at
the 50 ohm test BNC.
Two resistors in parallel, accurately set to 25 ohms (measured with a digital
ohm meter) connecting the 50 ohm test BNC to the 75 ohm BNC for the RG-6
feedline.
I use quad shield gel flooded RG-6 feed line purchased from :
www.therfc.com part number WIR-RG-6QFLOODED $0.11 per foot
Yes, those are short RG-58 coax cables in the box, the very short lengths of
RG-58 do no harm.
After the photo was taken I replaced the RG-58 with RG-179/U 75 ohm teflon
insulated coax (it made no difference at all...)
http://www.therfc.com/coax.htm
Good luck with your new BSEF array!
73
Frank
W3LPL
----- Original Message -----
From: "Mark Luhrman" <w4svo@att.net>
To: donovanf@erols.com
Sent: Monday, July 29, 2013 4:41:05 PM
Subject: BSEF
Hi Frank, I want to make one of these. I need some clarification on the
pictures. I noticed that you have extra resistors in parallel. Are these extra
ones on the side that goes to the bnc connector are only there for measurements
and then taken out? I am not quite sure because you state you use a 36 ohm to
match the antenna. The other question the mini splitters are 75 ohm. But in the
picture you use RG-58 which is 50 ohm. So I am confused about this also. Mark
W4SVO
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Topband Reflector
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