The only component common to just the A display is the CD4056 BCD-7 segment driver. Al AB2ZY Hi guys, I am using Alfaspid Rot1Prog rotator here. Strange thing happened few weeks ago... Rotator works
In the totally subjective, FWIW department... I once built one of these: http://www.k4eaa.com/yagi.htm. Instead of wood, I used PVC pipe, but otherwise the dimensions were identical. A windstorm comp
For those who don't want to do any modeling and aren't looking for a high degree of precision w/r/t ground conductivity, I've always found the charts and figures that accompany this article very usef
Two things: 1. I find it difficult to believe that condensation is a major problem. The volume of water in the water vapor contained in the air trapped in a conduit is pretty small even if the air wa
Err, no, the conduit must be below the dew point of the air in contact with it. Al AB2ZY _______________________________________________ _______________________________________________ TowerTalk mai
NO! At worst, a local machine shop can press a new bearing into a sheave. Depending on the diameter of the sheave, your own resourcefulness and tool collection, you can often do it yourself with a la
I don't know about your freezer, but mine has never exceeded room temperature! If you heat a bearing to the flash point of the grease, you've probably already destroyed the bearing. 73, geo - n4ua Be
300 series stainless steel alloys are austenitic; 400 series are martensitic. 300 series is formulated with nickel and a higher amount of chromium in the composition than 400 and are more corrosion r
The trend from long ago is towards LSI for complete systems, and FPLA type products for specialty high volume solutions. For low volumns and one-of, I'd be looking at a PIC. Be aware that's more prog
Just FYI, the standard way of connecting buried Cu radials to the Cu ring at the base of AM broadcast towers is by brazing. Al AB2ZY Jim, I side with your statements. I have experience with soldering
Me, I'd use Cadweld - best practice - for buried ground rod connections. The notion that an individual can second guess years of experience behind the code and do it better is hubris. Al AB2ZY True!
ground, but don't count on it to work for a primary on a power line either! Heh. Assuming I understand your point - hardly assured - I have one acronym for you: SWER. http://en.wikipedia.org/wiki/Si
the resistance is far too high to carry enough current. Not true - see my prior post. Al AB2ZY _______________________________________________ _______________________________________________ TowerTa
Huh? Much rural electrification was (and still is) carried out using the earth as a conductor. Building codes do not apply to electric power distribution and are irrelevant anyway to your assertion t
Does anyone know of a source for a reasonably priced manual RF transfer switch, i.e. DPDT with either UHF or N connectors? Reasonable = < $100. Needs to handle 1500 watts @ HF. I want to switch 2 amp
Thanks for the suggestions. The obvious one - use the xceivers two antenna outputs to switch between amps - eluded me until I started doing some of the hookups. Kind of a duh moment. A garden variety
The main amp is an AL-1500 that I don't want to wait to warm up for the casual 15 minute stint in the shack to see what's on the air. It's keyed by a conventional RCA jack reed relay connection on th
The only bad thing I can say about N connectors, having hastily made a decision a few years back to go all crimp on N to avoid soldering in the field, is the apparent lower breakdown voltage compare
They're not selling communications, they're selling access to stations. What you communicate is under your control and is subject to 97.113. Selling or renting equipment or access to the same is not
You are missing the main point. Selling access to your station is not a communication under 97.113. Al AB2ZY Not at all. When transmitting on a rented station, "the station" with specified location i