Thursday, May 18, 2023

Butternut HF6V repair




 My Butternut HF6V ground mounted vertical antenna stopped tuning during the middle of winter. It worked well for RTTY roundup but several weeks later I noticed it no longer was hearing any signals on any band. We happened to be having one of the harshest winters in recent memory with lots and lots of snow and since this antenna resides in the woods the snow depth is 3-4 feet so I decided to wait till spring to work on it.

 Spring was late this year. Our area experienced a record setting snow season so I waited till May to venture into the woods and inspect the situation. I disconnected the tuning stub at the base and checked for continuity, but it showed an open back to the shack. Checking from the shack towards the antenna showed a short-- -so multiple problems. The 75 ohm coax matching stub connects to hardline from the shack so I carefully sliced, unwrapped and extracted the "n" connector and realized the transition on the stub coax was bad. I decided to bring the matching stub into the shack for easier reassembly.
  The female "n" connector had come apart and shorted the braid to the center conductor and the spade lug end which connects to the antenna base had broke--thus a short from one end and an open from the other. The snow load probably caused some of this so I tried to make this a more robust connection adding a small length of wire to the spade lug end so it will have more ability to move and the hardline to matching stub connection I supported better since it's on the ground.
 After reassembly and testing okay, I was pleased to hear signals on all the bands this antenna is engineered to tune. The summer noise levels are rather high but it's nice to have this antenna back in service and next winter will hopefully survive unscathed.
73---Tim 

Wednesday, May 17, 2023

Swapfest 2023


 I decided to have a sellers table at this years local swap fest like I did last year and spent many weeks going through shelves and hidden areas of the basement. I found enough items to sell and also lots of stuff I no longer needed so off to recycling or trash. The picture above shows a home made amplifier I was given 20 years ago and I had planned to fabricate a high voltage and filament power for it but ended up being too busy with many other projects so it sat forgotten. I decided to check with the Ham who gave it to me before trying to sell it and He decided to take it back since the parts and tubes are still valuable. Fine with Me--just want to downsize!

 The basement looks much better with the amount of "stuff" I took and sold or took to recycling. It's nice to have open spots on shelves and not have equipment on the floor. I plan to keep downsizing and not add new stuff. Less is better!!

73--Tim