The other day a ham friend suggested using a coil ("hairpin") to match the low impedance of a well-radialed inverted L to 50-ohm coax. This struck me as a potentially-attractive alternative to a ser
More as an experiment and a thought-provoker than anything else, I've started adding 50-60-foot, on-the-ground radials to my 135-foot inverted L. In the latest incarnation I'm up to 4 radials. On m
Thanks to everyone who responded to my message - lots of good ideas. I think my favorite was the one about tapping a shunt coil from both ends, alternately, to bring both the radiation resistance an
I don't think I've ever read anything on this topic. Basically, what I'm asking is, could ground wave to a fairly nearby Skimmer be used as an analogue to low-angle radiation to assess the effective
Rick, I misled you with the reference to low-angle radiation. I'm broadly aware of how ground conductivity in the Fresnel zone works. What I'm interested in doing is characterizing how much my signa
Hank - any RBN node-op can make his output available at a local user telnet port. That's a built-in feature of the RBN Aggregator, thanks to W3OA. 73, Pete N4ZR Check out the Reverse Beacon Network
I'm in the process of building up a K9AY loop, using the Array Solutions boxes, and it occurred to me that I probably need to work out some way to protect the preamp in the shack-end box from transmi
Array Solutions no longer handles the K9AY components, which actually came from K9RU's Wolf RF Systems. It looks like the ICE limiter is still out there, and reasonably priced, but I have no idea wh
The loop is finished, but I'm having a devil of a time getting a ground rod in at the base. It's been over a month since the last rain here, and the soil is really hard. Seems like I read someplace
FWIW, I had a shunt feed on my 97-foot Rohn 25 with stacked tribanders and a shorty forty on it. I spent a long time trying to find a 50-ohm tap point on the tower and was never successful, so I chan
Thanks to everyone who responded to my earlier question about substituting radials for a ground rod. We just had 3 days of rain - our first in 6 weeks, so I don't think I have a ground rod driving p
That says it all - Wolf doesn't seem to be answering e-mails and I figured someone probably has already gotten one. -- 73, Pete N4ZR Check out the Reverse Beacon Network at <http://reversebeacon.net>
Corcom makes a variety of filters that are designed to replace the AC power input connector on PC power supplies. I have done this on two and had good results. 73, Pete N4ZR Sent from my iPhone _____
I just put up a K9AY loop, using the Array Solutions control boxes, and am pretty disappointed. There is no audible or visible difference in the noise level, while the received signal strength is do
Thanks to everyone who responded. I'm going to begin by disconnecting my transmit antenna at the feedpoint, as suggested by W3LPL and others, to see if it is the presence of the transmitting antenna
Thank you to everyone who responded to my query. The transmitting antenna was indeed coupling both noise and signals into my K9AY loops. I disconnected it at the feedpoint and the noise level on th
Now that I've determined that my transmitting antenna must be disconnected, in order for my K9AY loop to work successfully, can anyone tell me what sort of ratings are required for the relay required
Thanks everyone who responded - I think I know enough to proceed. I had wondered about the need to open the shield side of the coax - I have 16 turns of RG-400 on a Type 31 core right at the base of
I'm wiring up a relay to be used to open the feedpoint of my 160M inverted L. My intention is to have it connect the feedpoint to the transmitter when the relay is activated by PTT and open the circu
I'm hearing them very well at 1823.5, listening up. The op signs his call only every 15 minutes or so, and was working EU but switched to working US around 9:00 EST. without announcement 73, Pete N4