These are what I used.
> I have continued my search for good connectors for my CATV coax. As I
> mentioned in my previous post, the first step is to figure out exactly
> what kind of coax you have. I found most of mine on the Commscope website
> (www.commscope.com) and I have the QR type coax in various sizes.
> When I got the coax, I did also score a few pin type connectors for the
> coax. At first, I had no idea that these were actually useful. Normally,
> the pin goes inside some kind of equipment like an amplifier. However,
> you can screw the outer housing of a N connector onto the threads and by
> cutting the pin at the right length (and deburring it), you end up with
> a male N connector (thanks K2UA for this hint). You can use whatever
> adapters you need at that point.
> These pin connectors can be found pretty cheap.
> At www.tmbrokersmontana.com I found the ones I needed listed and the
> very reasonable (depending on the size, from $3.50 to $6 each).
> They also had some splices for my larger hardline for just under $10 that
> will allow me to put together some shorter pieces to make a nice long
> one. You can find instructions on how to prepare the cable on the
> manufacturer's web site in most cases.
> Even if you can't find these surplus, I found other places that had them
> new for not too much more money.
> Also - remember that e-bay is a great place to find your coring tools to
> prepare the coax. Expect to pay $20 to $35 for them.
> Not happy about using 75 Ohm coax in your feedline? You can construct a
> simple transformer to change 75 Ohms to 50 Ohms.
> The JULY-AUGUST 1981 issue of the NCJ shows how to make one.
> Cut 0.08165 wavelength lengths of 50 Ohm coax and 75 Ohm coax (mind your
> velocity factors!!). Splice them together and connect the 75 Ohm end to
> your 50 Ohm load/tranmitter and connect the 50 Ohm end to your hardline.
> The NCJ shows the following lengths for Regular RG8/11 or foam RG8/11:
> regular (.66VF) foam (.79VF)
> 80M 14' 8" 17' 7"
> 40M 7' 5" 8' 10"
> 20M 3' 9" 4' 6"
> 15M 30" 36"
> 10M 22" 27"
> They are pretty broadband. I recently made one for 24 MHz that works FB
> 15 and 10 meters. I have also used them on six meters on both ends of my
> hardline with 1500 watts without any problem.
> For 2 meters and above, I try to cut the hardline to be some number of
> wavelengths long - so that the impedance will be the same at each end.
> can test this with an SWR meter with the far end open. Trim the length so
> that you have high impedance (>= 1000 Ohms). If you do this, you don't
> to use any kind of impedance transformer. Put 50 Ohms on one end and you
> will get 50 Ohms on the other.
> 73 Tree N6TR
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
> TowerTalk mailing list
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
TowerTalk mailing list