While I have tried this myself, you could try black UHMW for your supports on the middle posts between the ones taking tension. UHMW is Ultra High Molecular Weight polyethylene. The black stuff holds
I see your point, since the signal is undergoing a conversion. My thinking was modulator = baseband to some kind of RF or digital signal, i.e. something very different from the original signal in ter
Just FYI, the jacket is probably polyethylene (PE) and not vinyl. Most outdoor cabling used by the telecom industry will have a PE jacket since it holds up very well over time. The only reason I ment
Squirrel chew is the biggest cause for aerial outages for most telecom operators. It's a big deal -- you can even get single and double-armored fiber to help with that. It's less of a problem with un
There are higher-quality F female connectors with a blue dielectric insert (not the normal white or clear insert). They are rated up to 2GHz if I remember correctly, but they also have better machini
Just a suggestion: the T&B Snap'n'seal connectors also have "Seal nuts" which can be bought separately. They're intended to seal out water from the thread area on the F connector. They are basically
As long as the grease isn't too thick it is fine even on low-pressure contacts. I've seen it used in RJ45 connectors for wireless LAN devices that are used outdoors to help prevent corrosion of the d
That sounds like no-ox on DC plant connections. You'll find after years and years that the copper will still be shiny and new looking in the grease-protected areas. The idea is to keep out oxygen so
Delrin is a trademark for acetal. Acetal is the generic name so you'll have a lot better time finding acetal most likely. My recommendation is to get the *black* acetal as it will hold up much better
Yep, that's the "black pigment commonly used" that I refer to. It's used in the PE jacks of coax too! I can't say I've tested black - vs - white materials in the microwave region, but I've never seen
Using grommets to create additional leakage/creepage distance is clever! I never would have thought of that! Best is to turn the material on a lathe, but in a pinch you can use a bolt as a mandrel in
The bar idea would probably significantly reduce the allowable tension on the cable, similar to what knotting does, due to the force at each "bite point" weakening the cable. I suppose if the cable w
It seems to me that whether or not one grounded the far end of a radial would make no difference. I don't see why one would want to ground the end of their radial, but if it was done with a ground ro
I've used stainless plenty of times and haven't ever really noticed any problems, but I've never tried to make measurements either. My new vertical matching network I'm building using silicon bronze
That's not entirely correct... Triplen harmonics are created by non-linear loads, but the voltage developed on the neutral as a result of them is a result of voltage drop between the source of the "p
Triplen harmonics, in most facilities, are caused primarily by lighting ballasts and "electronic" (rectifier-input) power supplies. The newer switching power supplies have a power factor controller i
I was reading this thread and all the concerns about oil in the capacitor. Has anyone ever thought about trying SF6 as a dielectric? It's commonly used in high voltage (hundreds of kilovolts) switchg
SF6 is sulphur hexaflouride. It's a dielectric gas, not an oil. For everyone thinking about oil there is also silicone oil available. I have no idea if its better or worse for rf though -- like Tom s
You could use the 18 gauge insulated stranded CCS (Copper Clad Steel) wire that Davis RF and The Wireman sell. The PE jacket is a matte black color and not very visible from any distance away. It's p
I'm working on a new matching network for my vertical. The vertical is a wire cage of approx. 82 feet high, and I use it on 160, 80 and 40 meters. The matching network is a low-pass L network. The ne