Trevor, I have found that winding a coil by hand may not look too hot but for a 160 Meter Inv-L they are easy to do. I use my Hytower with it's 65' radials as the counter poise and run a 12 Gauge multi-strain house wire from Lowes over a big Oak tree. Goes up and over the top and almost starts to come down on the far side. Ended up with needing about 123-121 feet of wire. Switches between about 1840Khz up to 1925Khz or so thanks to the switch. And about 60 Khz bandwidth. You can see where I ended up years later with an old commercial broadcast 56uH coil tapped thru a multi-tap switch on my qrz.com/ki7m page. Also added a Balun Design 1:1 just before going into the coil. The inv-L seems to get out real good both stateside and for DX. Hearing them is the problem I am still trying to work out. Too many projects, to little energy here.
Terry KI7M > On August 30, 2018 at 1:03 PM MR TREVOR DUNNE <[email protected]> wrote: > > > Thanks for the replies I want to be able to tap it at various points to allow > for some movement up the band, I don't actually know how much inductance as I > don't have the antenna in place yet, > > I wound a Homebrew coil last year but I fancied something tidier this time, I > was planning to install it in a nice enclosure and have some relays to switch > the taps ect, > > MFJ don't seem to have a contact email on there site it just says to order > and wait to see if it is in stock don't fancy waiting a few months more it's > been 4 already, > > Thanks > Trevor > EI2GLB > ----- Original Message ----- > From: MR TREVOR DUNNE <[email protected]> > To: ''''''topband List' <[email protected]> > Sent: Thu, 30 Aug 2018 07:44:04 +0100 (IST) > Subject: Topband: Air Wound Coil > > Hi All > > I'm looking for an Air wondering coil like in this link, > > http://www.mfjenterprises.com/Product.php?productid=404-0669 > > I've had one on order from MFJ via a UK company for 4 months now and no sign > of it, I want to build a at matching network for my 160m inverted T using it > or something similar, > > Can anyone tell me where I can get one of these or similar that is in stock > today, > > I don't have access to the tools/parts to wind one my self, > > Thanks > Trevor > EI2GLB > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband > > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband
