The u.RAT Rides Again!

The u.RAT will be put into service – now that I have switched to the Grounded Loop / Inverted U low band antenna On the left, the Spiderbeam aluminum mast used as a vertical – with Alumox between each joint, plus two hex head socket bolts and the clamps that came with the mast. On the right – 41′ of DX Engineering aluminum –…

High Pass T Circuit

High Pass “T” Coupler Circuit from http://www.w0qe.com/Papers/Antenna_Tuners.pdf Trying to get 4 bands 160 – 30M (and maybe even 20M as a bonus) is tricky with a 2 component L circuit, so I will follow Larry, W0QE’s lead and start with a High Pass “T” circuit – which gives great range at the sacrifice of a little loss. I plan on trying to find one position…

Grounded Loop: Step 2 – Test Adding the Ground to the Inverted U

I added the ground to the Inverted U, and while the tuner liked it – in the shack with high power, the amplifier faulted. I know the tuner is the wrong tuner, and the values of L and C were both very low. I don’t really know why, but I will experiment more using a different tuner. For tonight and tomorrow I’m back to…

Low Band Grounded Loop

The ARRL told me that they do not plan on continuing to update this book with new revisions. If you don’t already have it – you really need to order yours now – because it is already a classic.  More than ever, the combination of Low Band Antenna Experimenting and Maker projects is the cats meow in Ham Radio. I don’t even care so…

Steps to the Son of Mod Bob . . .

I have three aluminum elements up for the Mod Bob and will take down the center element: I already have a coax cable running from the Array Solutions switch you see to the left that goes all the way to that far element. The outside elements have the wire attached and it comes down to the center via a cool resin plastic (DXE) guy…

Son of Mod Bob!

Son of Mod Bob! Page 14-7 from the ARRL ON4UN Lowband DX-ing book Chapter 14 in the ON4UN Lowband DX-ing book is a gem. John shows how to take a 40M half square and feed it just like the grounded loop – and where it then is a close array on 80M with gain. The dimensions in the book call for 72′ wide and…