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
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 i
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 res
Hi Trevor, Simply terminate the high impedance side of your transformer in a 470 ohm resistor (or almost any other resistor) and use an antenna analyzer to measure the input impedance of the transfor
Thanks to everyone who has replied to me, guess I'll never know how good it would have worked with 3Y0Z cancelled, Trevor EI2GLB -- Original Message -- From: Stan Stockton <wa5rtg@gmail.com> To: MR T
I wind matching transformers for receiving antennas with 30 AWG wire wrap wire. A BN73-202 binocular core will accept up to 18 full turns (36 passes). The insulation is very tough and it will not sho
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#Be
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 availabl
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