Probably everyone but me knew or knows this but it seems it is NOT a good idea to use stainless steel band clamps as coil taps. Especially on a large 160M Base coil. Oh well. The ss band only got red
Larry, I wonder if there is something more going on there than just the increased resistance of the stainless steel metal compared to copper (or bronze?). Is your large 160M base coil made of quarter
I found some small aluminum coil taps at DX Engineering I will try on the time. The ss band clamp thing I saw on uTube (lol) but obviously he was not running 1500 watts and, with me not having tried
We all learn this sooner or later: Don't use ferrous metals to conduct RF. If a metal fails the magnet test, it's out. Every time I get some item of homebrew or something that's had a previous owner,
Rob, are you implying that I shouldn't use a steel lattice tower to conduct RF as a radiator? For coil taps, I like to solder. Luke VK3HJ On 16/11/2020 10:05 pm, Rob Atkinson wrote: We all learn this
Conductivity of Copper: 5.85 x 10^7 mho/m Conductivity of 301 Stainless: 0.14 x 10^ mho/m Stainless is 42 times worse conductor than copper. Larry, was the band clamp holding a copper conductor onto
@Tim, For the sake of my experiment I was indeed using the band clamp to hold a small aluminum eyelet soldered onto#14 wire for the tap wire. The wire used for the coil is solid copper 10 gauge wire.
I need to correct some misconceptions: Conductivity of 301 Stainless: 0.14 x 10^ mho/m Stainless is 42 times worse conductor than copper. 1. Because of skin effect, the surface resistance is inversel
I agree Rick.. Too clever but just enough to fool me.. once. After I get the new coil ready (Using brass hardware to replace the stainless bolts also) and find the sweet spot again using the proper c
Tower leg ground clamps all have stainless steel between the tower and the copper strap. Seems like the lower conductivity of stainless could be a huge issue during a lightning event. Yet, I haven't
Nickel is not OK. I could tell a war story about gold plating over a nickel barrier where the plating shop skimped on the gold. Wes N7WS On 11/16/2020 4:05 AM, Rob Atkinson wrote: We all learn this
Good question and I wondered the same thing. Firstly not "implying" that at all. It comes down to mass and surface area. The problem with steel, iron, etc. is when you have a lot of RF current over
Author: "tony.kaz--- via Topband" <topband@contesting.com>
Date: Mon, 16 Nov 2020 11:51:07 -0500
I use a zinc ground clamp on each tower leg to attach the tinned #4 solid copper ground wires. N2TK, Tony Tower leg ground clamps all have stainless steel between the tower and the copper strap. Seem
I could tell a war story about gold plating over a nickel barrier where the plating shop skimped on the gold. Wes N7WS I have a war story to tell: HP used to have pretty gold plated PC boards, which
This got me reading (https://en.wikipedia.org/wiki/Ferromagnetism) and I must state that I was mistaken about nickel, which of course is part of AlNiCo speaker magnets for one thing. I apologize and