I would like some pictures of it also. I am in the same situation. I have an LM354 that I need a base for too. Thanks! Gary K4FMX _______________________________________________ _____________________
1/2 or 3/4 hp at 1750 rpm. It was a sealed motor. You could use any type and make a cover for it to keep the rain out. Most motors are reversible but not all. 73 Gary K4FMX __________________________
With AM modulation the plate voltage doubles with 100% modulation so peak envelope power is increased by a factor of 4. With the plate modulated AM transmitter having an efficiency around 70% or so,
You will want to have something better than the type of relay used to switch 50 ohm coax though. 1500 watts at 50 ohms is 273 volts. 1500 watts at 600 ohms is 948 volts and that is providing the swr
It is workman's comp insurance that you need to worry about the guy having that is doing the work. If you hire anyone to do anything they need to carry workman's comp or they can sue you if they get
At the rotator put large mov's on each wire to case ground. Put a large heavy flexible wire from the top of the rotator case to the bottom plate of the rotator (with a loop so it can rotate) to bypas
Look at the polyphaser site. You may want to order their "grounds for lightning " book. Around $20.00 or so. Lots of good info on the web site. 73 Gary K4FMX _________________________________________
Does anyone have any experience with putting up an 80 or 40 meter vertical in a swamp? I have a swamp of about an acre and a half that contains rather thick undergrowth and trees that are old but not
Thanks for the info Walter. My swamp is located in North eastern Wisconsin. No salt around the area. I may put a vertical in there or beside it and give it a try. It of course would be much easier to
Hi Ed, You don't say what kind of tower you have? Are you putting the tower into the concrete or mounting it on the concrete with J bolts? You should tie the J bolts into the rebar inside the concret
Not in the situation being discussed! 73 Gary K4FMX _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com ht
There is so much mis-information flying around that is sometimes becomes humorous. Some facts: These can all be verified by reading information that Polyphaser provides. (1) All metal within the conc
I didn't carefully read the whole thing, too long. But some observations: A crank up tower is very hard to ground as there is no good connection between the tower sections so your cables are prone to
If gain is expressed in DB it doesn't matter. If voltage is being measured and it gives you a 6 db change between 2 different antennas they will also give you a 6 db change if you are measuring power
Here is a link to a Coast guard tower manual. Some good info in it. http://www.uscg.mil/directives/cim/11000-11999/CIM_11000_4a.pdf 73 Gary K4FMX _______________________________________________ _____
I think what he is trying to tell is that a half wave antenna that is fed in the center is called a "dipole antenna" and a half wave antenna that is fed from the end is not called a dipole antenna re
Mark, I did not read the whole document but I did read the parts on lightning and grounding. I would suggest that you throw that part out and start over on it as about 80% of it is incorrect informat
Roger, You say that with a lock nut on the bolt that you can not turn the bolt in the rotator without breaking it. What you are missing is that with your lock nut on the bolt, it is not the bolt/rot
Now there you go. Do your own rotor control protectors. All that is in the polyphaser unit is a large mov to ground on each line. 73 Gary K4FMX _______________________________________________ _______
Rick, Did you get their metal cutting chop saw or a regular saw for wood and put the metal blade on it? 73 Gary K4FMX _______________________________________________ ________________________________