Tnx Tree , I plan to do just that using my AIM 4170 . May be a day or
so, have suitcase company on the way
Ed N5DG
On 9/28/2016 1:09 PM, Tree wrote:
One easy thing you can do to test your transformer is to put a 75 ohm
resistor on the proper side - and then use an SWR meter to measure the
im
One easy thing you can do to test your transformer is to put a 75 ohm
resistor on the proper side - and then use an SWR meter to measure the
impedance on the 50 ohm side. I like to also see how high in frequency I
can go before the SWR starts to rise. Most of the transformers I wind
typically wor
Thanks all for your wisdom . Some say not needed and some say to use the
75 / 50 transformer . I figure it's easy enuf to do . So now I'll try it
and see for my self .
Thanks again, Ed N5DG
On 9/27/2016 10:35 PM, Ed Stallman wrote:
My receive antenna is 75 Ohm RG6 connected to my radio and I
Unless the coax is acting as a delay line, in which case the phase shift is only
as predicted when the line is properly terminated, the mismatch is trivial. The
radio probably isn't a good match anyway.
On 9/28/2016 7:47 AM, Tree wrote:
I suppose I need to ask if worrying about impedance at th
Actually there is a reason or two to match the feedline impedances when
using these active antennas.
There are amplifiers in most of these systems that rely on their matched
impedances to produce their best IMD capability. It may not matter in some
areas of the world but in others with high
ing.com>
Subject: Topband: 75 ohm RG6 to 50 Ohm radio
My receive antenna is 75 Ohm RG6 connected to my radio and I want to wind
a 2873000202 binocular core to step 75 to 50 Ohm's . I seen this info on
W8JI web page but can't seem to find it again.
I do remember it's 4 turns 50 Oh
com
Sent: Wednesday, September 28, 2016 2:45:21 PM
Subject: Re: Topband: 75 ohm RG6 to 50 Ohm radio
One thing that W8JI clarified for me in winding binocular cores is what
is a "turn". Normally, a wire thru a toroid hole is a "turn". A
binocular core is two toroids in a single
d [mailto:topband-boun...@contesting.com] On Behalf Of Ed
> Stallman
> Sent: Tuesday, September 27, 2016 8:35 PM
> To: topband@contesting.com
> Subject: Topband: 75 ohm RG6 to 50 Ohm radio
>
> My receive antenna is 75 Ohm RG6 connected to my radio and I want to wind
> a 28730
ehalf Of Ed Stallman
Sent: Tuesday, September 27, 2016 8:35 PM
To: topband@contesting.com
Subject: Topband: 75 ohm RG6 to 50 Ohm radio
My receive antenna is 75 Ohm RG6 connected to my radio and I want to wind a
2873000202 binocular core to step 75 to 50 Ohm's . I seen this info on W8JI web
p
Sent: Tuesday, September 27, 2016 8:35 PM
To: topband@contesting.com
Subject: Topband: 75 ohm RG6 to 50 Ohm radio
My receive antenna is 75 Ohm RG6 connected to my radio and I want to wind a
2873000202 binocular core to step 75 to 50 Ohm's . I seen this info on W8JI web
page but can't
My receive antenna is 75 Ohm RG6 connected to my radio and I want to
wind a 2873000202 binocular core to step 75 to 50 Ohm's . I seen this
info on W8JI web page but can't seem to find it again.
I do remember it's 4 turns 50 Ohm and 5 turns 75 Ohm and all wires come
out the same side of the cor
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