Just wanted to reiterate Jim's advice and share a story... Years ago, my Elmer showed me how to use a small cheap AM transistor radio (seems that lower quality ones seem to work best) to locate line
I know the International Building Code which is adopted by a lot of permitting jurisdictions has requirements for restraint of roof mounted equipment that can potentially blow off at design wind spee
Wind drag over tubes essentially acts perpendicular to the axis of the tubes, thereby transferring the drag force axially to the boom, which creates a torque moment about the mast because of the shor
Condensation will form when surface temperatures are below the dew point of the air inside your box. Ground moisture will migrate into your conduits and thus into your box on warm days and elevate th
Silicone (pure) dielectric grease works fine for connectors. PVC-IIA (non-contaminating) or PE-III jackets both hold up pretty good in Texas. Flooded cable never hurts but be sure the center conducto
Starting caps come in value ranges. My experience is that slightly higher values generally pose no issue, whereas too small may not be enough to get the motor started under load. Try it to confirm. I
You need to buy, fabricate, or borrow a mast raising fixture. 73 Matt KM5VI Chuckle! Got on the air two months short of 70 years ago and there was always some bitchin' going on the about some issue b
Just a question - but why Moxon 30m and not just 2-el? Moxon advantage on 40m is the improvement of performance bandwidth compared to "typical" design with shortened 40m elements. 30m band is only 50
Hi Jim, Yes - I used some RFI brand connectors with no issues - they were very good quality. I think I got them online from "The RF Connection" vendor. I have also bought a lot of connectors from N5I
Hi Allen, Have you tried emailing Norm's Rotor Service? They may have one. 73 Matt KM5VI Looking to purchase a STEEL ring gear for a TailTwister Rotator. Anyone got one out there? 73, Allen R. Brier
About 10 years ago I found some suitable replacements at boltdepot.com Perhaps they still sell that size. 73 & GL Matt KM5VI I can't seem to find the exact right size at McMaster-Carr. Maybe I am bei
For a very old TA33 that was given to me 25 years ago, the size coil forms are all the same but the number of turns differs. Number of turns as follows: Director inside: 14 Director outside: 23 Radia
Step 1: Adjust the driven element length to center the SWR across your desired bandwidth. I.E. adjust to make the SWR the same at the bottom and top of your desired bandwidth. Step 2: Adjust the harp
P.S. - Yes use the original hairpin spacing. All the 204's I have seen have beta match angled rods at the feed end. Other Hy-Gain monobanders have straight rods. Be sure you are using the correct rod
P.P.S One more thought, or remembrance... With the optimized element spacing, the antenna will not be weight balanced and will be "tail heavy". You will need to add some weight to the director end of
Tune individual elements about 100 khz below target resonance without allowing any mutual coupling to adjacent elements (ie feed points of adjacent elements are open circuited or elements not install
Do you know what series and grade of stainless material? Many 300 series SS grades yield strength is only ~30% that of 4130 chrommoly carbon steel but still useable within limitations. A53 grade B Sc
John is correct about the commercial flange bearings. One flange bearing option is a UCFL210-32. This is an industry standard 2" ID self-aligning ball bearing in a cast iron 2-bolt flanged housing. T
Just reiterating Rick's comment about Hygain baluns... I think there may have been a couple of different models, but I've acquired nine used Hygain monobanders over the years and the baluns that came
If the video is advanced frame-by-frame at about 7 to 8 seconds the jib can be seen to deflect downwards continuously until failure occurs. If the strap broke first, the jib reaction prior to failure