Hi All and HNY for 2021. Preparing for the CQ160m with new (2 coax) 2-wire beverages to cover the missing azimuthal gaps based on LBDX. The first 2x Bevs worked great back in last Jan. Now I have dif
Hello Csaba, I approach this problem this way your impedance ratio is 745/50 ohms or 14.9 . To get turns ratio use the square root of that which is 3.86 . So round that up to 4 as a good turns ratio.
Lee, What kind of wire do you use that allows that many turns (4t and 16t)? 73 Mike W0BTU _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
Hi Mike, Assuming that you did not miss that this was a tapped winding and not separate windings as Csaba mentioned. I see on reflection that he measured 1:1.16 on one of his tests. In reality it won
Hi Lee, Csaba said his transformer was " n1=3T/n2=12T tapped @6T ". This sure sounds like a transformer with two separate windings (3 Turns on the Primary, and 12 Turns on the Secondary and then it a
Hi Lee, Csaba also refers to this transformer as T2 and based on what he has said so far I suspect he is constructing something similar to the two direction beverage shown in figure 7-115 in the 5th
Hi Don, Regardless of the transformer whether its a tapped or separate. I gave him the tools that should make whatever he does correct. Personally I keep my Beverage when I make one at 450 ohms which
Sorry Guys, I miss interpreted Csabas transformer problem. My email program truncated the URLs and most of the information past that point. What I did get I misread as a result so now I am curious al
"The best I could reach now on 160m is - SWR: 1:1.29 (Rs=40.4 Ohms, Xs=-5.4 Ohms) vs. in 2019: - SWR: 1:1.16 (Rs=43.2 Ohms, Xs=-1.6 Ohms)" If I can get those matches on a *transmitting* antenna, I am
Hi All, Yes, I refer to this 2-wire design: http://ha3ln.hu/2wire.jpg 73! Csaba Csaba also refers to this transformer as T2 and based on what he has said so far I suspect he is constructing something
Hi Lee, Thanks for the notes. Yes, the 1:1.16 measurement was from 2019 which I take as baseline. My aim was to have similar transformers for the new 2-wire directions but somehow I cannot wind them
...no problem Lee, actually each new idea helps. I'll give a try the n1=4T version with a 0.3mm (~AWG 28/29) wire to see if I can push a bit better matching. Sorry for the links I tried to avoid send
...thanks Luke, then I stop gold plating... ;-) One of the new directions is pointing dedicated to VK/ZL hope I can catch you in the CQ160m. 73! Csaba If I can get those matches on a *transmitting* a
I question the wisdom of grounding the feedline shields at the antenna for either open wire or coax designs. Was this a error in the schematic? The bidirectional design using a coaxial cable shield f