1/4 wavelength of 75 / 2 = 37.5 Ohms Will take your 28 ohms very close to 50.
On Mon, Jan 17, 2022 at 8:47 AM Kenny Silverman <[email protected]> wrote: > Thanks Frank. Are these 1/4 wl lines? And are T-connectors OK? > > Regards , Kenny K2KW > > > On Jan 17, 2022, at 11:29 AM, Frank W3LPL <[email protected]> > wrote: > > > > Hi Kenny, > > > > A very workable alternative is to use two lengths of 75 ohm coax > > in parallel. RG-11 is the best choice, but two lengths of RG-6 > > will also work. No need to coil it up, simply use it as part > > of your transmission line from your antenna base to your station. > > > > 73 > > Frank > > W3LPL > > > > ----- Original Message ----- > > From: "Kenneth Silverman" <[email protected]> > > To: "topband" <[email protected]> > > Sent: Monday, January 17, 2022 2:18:30 PM > > Subject: Topband: 1:2 UNUN > > > > Does anyone have a drawing on how to wind a 1500w 1:2 UNUN? And what > type of core is needed? > > > > This is for my 160m vertical which is about 28 ohms. > > > > Regards , Kenny K2KW > > _________________ > > Searchable Archives: http://www.contesting.com/_topband - Topband > Reflector > _________________ > Searchable Archives: http://www.contesting.com/_topband - Topband > Reflector > _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
