fly ash is another one used for conductivity enhancer in concrete: see some of these: https://www.google.com/?gws_rd=ssl#q=fly+ash+concrete+mix+conductivity this is a pretty comprehensive one: https:
Yes, but -- it's my understanding that bentonite and similar materials must be recharged periodically to be effective. 73, Jim K9YC _______________________________________________ ___________________
the greenheron software is what I use on my touchscreen. they also have switching modules that can be controlled from it for selecting antennas. I'm working on setting my station up as a 'glass panel
but, if you put a fixed 6m antenna near the top of the tower below the rotating one that is totally defeating the purpose of breaking up the guy wires to avoid resonance on 6m since you are putting s
on the other hand... if doing this for SO2R operation only one of the transmitters would be keyed at a time. You would only have to worry about combined dissipation for multi-op stations or expeditio
I would put an insulator at the end of the ssb piece, then the cw wire, then another insulator. use something like a split bolt or clamp with wing nuts instead of alligator clips. alligator clips can
Verizon is forcing everyone to use their Verizon.net domain as your 'from' address, need to see which lists will need to be changed. _______________________________________________ __________________
Maybe, but I would worry about the ferrites at high power. I do something like that with coax transformers and/or stubs to flatten out some bands or compensate for the mismatch caused by 75ohm hardli
I have used Marmon-Keystone here several times when I needed full length pieces for repair and upgrade of antennas. They have (or at least used to) do free delivery, or you could go and pickup at the
I would say no, with a matched load on the feedline I would expect all the power absorbed from the external excitation to be transferred to the load. What are you trying to do? David Robbins K1TTT e-
I have 5kw worth of the enphase microinverters, heard a little bit of noise from them on 10m and fixed with a couple clamp on ferrites on each inverter. It is nice for service also, had one inverter
Compasses in smartphones are like the ones in your car, a magnetic sensor. So they are affected the same way as any other magnetic compass. A gps can only tell you what direction you are moving and c
You can also work out what directions your guy wires point, or even what bearing the sides of the tower are at, both of those are easy to use either from the ground or while up the tower to align the
I had one just like that but on my 20m stack. It had been arcing intermittently when the temperature went above freezing, then would stop arcing after a while until Friday before a rtty contest a cou
Its good you didn't find 1/8" wall aluminum, you want 1/4" wall! David Robbins K1TTT e-mail: mailto:k1ttt@arrl.net web: http://wiki.k1ttt.net AR-Cluster node: 145.69MHz or telnet://k1ttt.net:7373 I'm
I want to get some cores to be able to repair two wire Beverage transformers and reflection transformers. I have been reading this: http://www.qsl.net/n1eu/topband/BeverageXfmrs.htm and some other ar
That fair-rite product number comes back to a multi-aperture core kit that has 5 sizes of 4 different materials... has fair-rite maybe changed their product numbering since some of those pages have b
Those lightning porcupine things have been totally debunked, they do not do what is claimed and are not a substitute for proper grounding and bonding which is the real lightning protection for your e
What about them? they work just fine for me. in the beginning on the g-1000/2700/2800 series they had problems with clamps breaking, they were replaced free of charge. David Robbins K1TTT e-mail: mai