On 2/5/2018 8:23 PM, Grant Saviers wrote:
I also use wire wrap wire. The Kynar insulation is designed to not cut
thru against a sharp corner wire wrap post, no need to insulate
ferrite. I use 26 or 30 gauge. Multi colors are fun and available in
small spools on ebay in both gauges. No mess
uot;
Cc: "topband"
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 resistor on the high impedance winding and an
antenna analyzer on the low-Z.
And mak
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.
erage 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 it from about 1.5 to 5
mhz and you should see a good SWR over that rang
ginal Message -
From: "Mike Waters"
To: "MR TREVOR DUNNE"
Cc: "topband"
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 res
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"
To: "''topband List''"
Cc: "MR TREVOR DUNNE"
Sent: Friday, February 2, 2018 3:33:32 PM
Subject: Topband: Beverage transformer and testing
Hi I know it's proba
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, ZF9CW
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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