The rotator was received, used, as a gift from a friend and has been working flawlessly for about 10 years until this winter. I'm not sure about the specific model number suffix (after OR-2800), but
Many years ago I installed a Ham-M rotator with a bearing above it and mechanical linkage to eliminate the weight on the rotator. This worked fine for a while. But, eventually, the top casting came l
I've recently purchased a small tube from DX Engineering, and am considering applying it to the mating surfaces of connectors that are difficult to access at the top of a tower. I would appreciate co
I am considering applying Loctite Dielectric Tune-up Grease to the mating surfaces of connectors that are difficult to access at the top of a tower. I would appreciate comments about this - especiall
I would like to replace my MFJ 259B with an analyzer that works properly in a high RF environment. I'm located near an AM broadcast transmitter which precludes making reliable measurements. MFJ sells
I'm currently in the planning stage of replacing a very long length of coax with open wire line with appropriate transformers at each end. So far, I've only been able to find 450 ohm line, commonly c
Thanks to all of you who replied. The antenna system is for 160, 80, and 40 meters. 450 ohm OWL (open wire line) spacing is too close unless many spacers are used, and that would likely increase loss
Rick, According to Sevick's "Transmission Line Transformers" (latest 5th edition), there is a technique for winding transformer cores with parallel lines in a way that doesn't create magnetic flux in
Perhaps this is larger than what you need. I'm using a small metal garbage can to house relay switched antenna tuners for 160M-80M-75M-40M at the base of a vertical. The can sits on top of several br
Although I'm not using a Prop Pitch, the winter weather here in Cedar City, Utah can be very cold. My home weather station has measured temperatures as low as -23F. Because of this, when overhauling
A friend has offered me an old ~70' crank-up tower. The steel and galvanizing all appear to be in good shape, but the crank-up cables need replacing. I would also like to have the pulley bearings rep
I have an M2 OR2800 rotator that I would like to be able to install in a Tashjian LM-470 crank-up tower that I may buy. I would appreciate hearing from anybody who has done this or may have informati
Fifteen years ago, I had attached a tower to threaded steel studs protruding from the tower's concrete base. Now, I need to replace the tower. Even though I used highly recommended "PB Blaster", it w
Mention was made of the possibility of removing hard epoxy. I didn't know that this could be done without damaging whatever is encapsulated. Perhaps there is a solvent that will do this. I would real
I'm trying to troubleshoot the RC2800PX control box used to control the OR-2800 rotator. This is the rotator with an AC motor. After switching on the control box and momentarily pressing and releasin
After over 25 years I've found some problems with connector conductivity at my 4X4NJ station. I would be interested in knowing about experience that any of you may have with reliable connector conduc