Re all the recent posts about the RCS8V coax switch. How is the best way to remotely switch 450 ohm twinlead? I will have 3 arrays which are fed with twinlead. I want to individually switch these to
Aloha Henry, The relay you want and need is at Surplus Sales of Nebraska. I just bought two of them for switching my four v-beams planned for setup this Summer. The perfect unit, ceramic bases, is an
Before you spend $65 PER RELAY, suggest doing a little snooping about the other various surplus houses - Fair Radio in Lima, Ohio would be one suggestion. Bob Grinnell's Surplus Sales is the LAST sto
<< There can be no "bump" of impeadance using these that will amount to any problem. Only caveat is the use of 115VAC coils, but not a big deal. All the coax antenna relays etc. of the '50's were als
On Fri, 6 Jun 1997 10:53:23 PST henrypol2@juno.com (Henry A Pollock) writes: For the ultimate in power handling capabilities, I'd go with three-phase contactors (sometimes called starters). These pup
Speaking of 450 ohm open wire, what is the best way to get the wire into the shack? The flexible strip under the window doesn't get it any more. Bill W5EC -- FAQ on WWW: http://www.contesting.com/tow
Aloha Bill, Here in Hawaii, most homes come with "jalousie" windows. Each section is made up of five long, narrow panes of glass which tilt open/close. For me it is very easy: slit in the plastic scr
Henry, Unless you are using a matched 450-ohm load to 450-ohm lead, the impedance bumps created by relay spacing will be in almost all instances meaningless and minor, with no consequences for effici
Bill, Lots of good ways. a. Ceramic feed-through insulators through a piece of wood, with inside and outside connections. Works with window frames (wood) or siding. b. PVC pipe through the house side
Loyd Colvin, in his 8/56 QST article, suggests leaving a small voltage on the relay coils. This to provide a bit of heat to drive the moisutre away. Wonder if it really works, I will try with my set
I've been using a 10 amp 240v AC cheapy relay for my 100 watt station without problems for eight months. I ran three 450 ohm ladder lines in from three directions at right angles and the coil voltage
Bill asks: == snip == Speaking of 450 ohm open wire, what is the best way to get the wire into the shack? The flexible strip under the window doesn't get it any more. Bill W5EC == snip == Hi Bill, I
Heating elements that "drive out" moisture only work when powered. This is dandy for commercial and military stations that are powered 24 hours a day. For ham installations that may be on for only s
<><><><><><><><><><><><><><><><><><><><><><><><><><><><> Instead of a separate heater, you might consider just keeping the relay energized all the time when not in use. That's what I do for my 80/160
Personally, I've used the pillory method. Two pieces of plywood with indents filed into one of the long edges. When I close the window, the indents (hopefully) line up. Just before that, I run the la