If you buy the calcs from UST for $25, you can read the bolt specs off of those. For my HDX-5106, they show ASTM A36 or equivalent, 1.125 inch diameter, 27 inch long, 36,000 psi yield strength. Note
You would have to have a bunch of relays in the linear loaded wire to make it disappear all the way to 54 MHz. Having thought about schemes like this for a long time, I would say it is not practical.
I wanted to modify a 2 element SteppIR Yagi (the regular one) for 30 meters (as a dipole). Since I would be running only 100 watts, the voltage was "only" a coupla thousand volts. The scheme might ha
Has the following experiment been tried? Suppose you have 2 stations with stacks. Skip is long, so that propagation is better with both stations on their upper antenna, compared to both stations on t
I am running Writelog controlling an FT-1000D and a Steppir. The Steppir initially goes to the right frequency, then jumps to 20.95 MHz. The Steppir website warns about this and says newer "software"
I like the mouse buttons. The only thing is that I look kinda nerdy with a mouse in each hand (Spid + computer). Rick N6RK _______________________________________________ See: http://www.mscomputer.c
I had thought about that before, and am waiting for a good deal on a 40m beam to come along. However, I will convert it to a ZL special instead of a Yagi. This gives much better F/B ratio, and is not
Some people have used flexible 1/2 inch or 5/8 inch black plastic irrigation tubing. The unknown is whether the critters can and will chew thru the tubing and get their teeth into the coax itself. Yo
See my web site: http://www.n6rk.com/falling_derrick_gme/falling_derrick_gme.html for photos of my 50 ft 175 lb aluminum tower tilting up. Instead of a 6x6 as a derrick, make a tee out of 2x12s. The
What I do is have a switch that sends various DC voltages down the coax for various configurations. Relay boxes are located at various points on the coax that sense the DC and route the RF signal acc
I have a UST HDX5106 tower with TRX 100HD raising fixture that I have just installed on the concrete base. I am almost ready to try tilting up the tower. It occurs to me that the tower weighs 3000+ l
Lou started Tri-Ex and sold it. Then he started Tristao. Around 1985, Tristao became UST and Lou retired. Meanwhile, Tri-Ex continued on independently until its recent reorganizations. Rick N6RK ____
I've had an Alfa Spid for a couple of years. It has many advantages over conventional rotators, which I would never go back to. Rick N6RK _______________________________________________ See: http://w
Many people are recommending the Alfa Spid, which is $1000 Canadian or $700 US. You will pay as much or more for a Ham IV with computer interface. The Alfa Spid has many advantages over the Ham IV th
Several people have asked about my beverage switching scheme. I send a different DC voltage down the coax for each antenna and have a circuit at the end that detects the different voltages with compa
I also have a ranch with high speed wireless internet. I just installed "LogMeIn.com" (free) and "skype.com" (free)and TRX Manager on the ranch computer. I have a Kenwood TS570 out there for remote b
If you look at web sites selling windmill masts, they often show this type of raising system. Rick N6RK _______________________________________________ See: http://www.mscomputer.com for "Self Suppo
Stiffness (not strength) is proportional to the quantity: OD^4 - ID^4. In your current case, this is 2.5^4 - 1.5^4 = 39 - 5 = 34 The best you could possibly do with an aluminum insert is to emulate a
Many rigs are sensitive to supply voltage, my old FT-757 was especially bad. What I have always done is locate a small (~5 Ah) gel cell battery right at the radio, so the radio will reliably have at
N plugs have been superceeded by 7/16 connectors in some of the higher power (many kW) ISM equipment. The 7/16 connectors are very rugged. (7/16 refers to 7 mm center, 16 mm outer cond.) Rick N6RK _