"MR TREVOR DUNNE" <ei2...@eircom.net>
Cc: "topband" <topband@contesting.com>
Sent: Friday, February 2, 2018 6:04:01 PM
Subject: Re: Topband: Beverage transformer and testing
The instructions are at
www.w0btu.com/Beverage_antennas.html
To test it, put a 450 ohm resis
I always line the holes in those cores with irradiated polyolefin HST. You
just have to stretch it a little, and it will easily pull into the holes.
(Photos at
www.w0btu.com/Beverage_antennas.html#Beverage_Antenna_Transformers
Then we can just use magnet wire, 24, 26, or 28 AWG. I mostly use #26.
Sent: Fri, 02 Feb 2018 16:20:14 - (GMT)
Subject: Re: Topband: Beverage transformer and testing
Put a 600 ohm resistor or something close across the secondary leads where
the beverage would be connected and hook up an analyzer to the primary
wires and see what you read on your analyzer. Check
The instructions are at
www.w0btu.com/Beverage_antennas.html
To test it, put a 450 ohm resistor on the high impedance winding and an
antenna analyzer on the low-Z.
And make sure there is infinite resistance between each winding and the
core, as 73 material is conductive.
73, Mike
www.w0btu.com
Frank Donovan
W3LPL
- Original Message -
From: "MR TREVOR DUNNE" <ei2...@eircom.net>
To: "''topband List''" <topband@contesting.com>
Cc: "MR TREVOR DUNNE" <ei2...@eircom.net>
Sent: Friday, February 2, 2018 3:33:32 PM
Subject: Topband: B
Put a 600 ohm resistor or something close across the secondary leads where
the beverage would be connected and hook up an analyzer to the primary
wires and see what you read on your analyzer. Check it from about 1.5 to 5
mhz and you should see a good SWR over that range and more.
73...Stan,
Hi I know it's probably been covered here hundreds of times but I'm looking to
make a matching Transformer for a 550ft beverage to 75 ohm coax,
I have so bn73-202 cores
Also how can I test it once it's built
Thanks
Trevor
EI2GLB
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