Ed, Look for a Johnson Matchbox if you want something to tune up an antenna fed with open wire line. They were made in 150 watt and 1 KW versions and some had a built-in SWR bridge on the transmitter
Vince, I currently have a 600 ohm line bent about 90 degrees. It comes from my 268 foot center fed Zepp, crosses my roof, goes over an aluminum rain gutter and then down the side of the house to the
B&W made the antenna tuner for the BC-610. According to Jack Williamson it was the BC-939. But they didn't build any BC-610's. The BC-375, mentioned earlier as the antenna tuner, was a transmitter in
Karl, I'm not familiar with the relay used in the 509, but dry reed relays are quite common. My Mouser catalog has five pages of them. If you can give me a physical description and a manufacturer's n
Bob and Lee, Mouser Electronics lists a line of C0G (NP0) ceramic, radial leaded capacitors in their current catalog. They range in value from 10 pf to 0.022 microfarad. I can give you the part numbe
If you are using a balanced tuner that makes a DC connection between both sides of the ladder line and the tuner coil, just center-tap the coil and ground the center tap. If you are using some other
Phil, I have a "Center Fed Zepp" that presents an inconvenient feedline end impedance to my tuner on 40 meters, so I add an extra quarter wave, about 33 feet, of 450 ohm ladder line to the end of the
Leonard, Out of curiosity, is your fan blowing in or out? Lo these many years ago, I put an exhaust fan on the back of my HRO-50 (Hank Pfizenmayer will remember it as the one used at W4VIV/W4RXK in t
It looks like we have found a manual for Bill. You guys just have to know where to look, HI. Jim, W8KGI -- Original Message -- From: Don Buska - The Radio Lab works<mailto:don@radiolabworks.com> To:
Bill, Check out the James Millen Society page at http://www.isquare.com/millen/millen-page.htm#4<http://www.isquare.com/millen/millen-page.htm#4> . Under "Schematics and Mfg Documents" you will find
Just had to share a grin with a few folks who would understand. I was all ready to hit the Classic Exchange yesterday (Sunday) with my usual collection of powerful boatanchor rigs like my Globe King,
Paul, I know you've gotten a lot of good advice about verticals. Here's a completely different suggestion. Put up a horizontal doublet, feed it with open wire or ladder line, and match it with an "an
There is an R. L. Drake Low Pass Filter on ebay, item 320251164898, ending at 12:58 PDT Sunday. Its current price is $8.28 with two bids. It should be a good one. There is also a Nye Viking filter, i
Ed, A properly designed filter should be terminated in its characteristic impedance at your operating frequency, probably 50 ohms, and will present a 50 ohm impedance at its input at your operating f
Bob, Let me first apologize for not replying sooner. I get the digest from the reflector, so I have some delay before I get to see your messages. You asked, "IF the transceiver had harmonics and thos
Doug, Wow, if I understand you correctly your neighbor is experiencing TVI from a 160 meter station that is 70 miles away. That is, to say the least, very unusual. I also understand that your 160 met
Rob, I use banana plugs to terminate the line from my Center Fed Zepp, and to insert a 40 meter quarter wave line in series with the main feed line for cases where the line impedance is not one my tu
Y'all, I just acquired a Triton IV, the digital model, and I'm having fun putting it on the air. Unfortunately the manual with it is for the analog model, so I have a few unanswered questions that I