another productive day in the attic
wb4jfi at knology.net
Sat Aug 26 11:13:18 CDT 2006
Actually, when I said 30 meter antenna, I meant 17 meter dipole. It resonates OK at 18.140MHz. However, when I tried it today, some RF from it gets into the 720, causing the display to blink some. I will need to move the antenna a little to reduce the RF in the shack.
I also just "recovered" a 1GHz AMD computer from a friend, and will put it in the shack. A better sound card will help it work better than the current laptop.
I also found an old SSB Cb rig that was converted to 10 meters about 30 years ago. I put it on the bench to check out sometime soon. Now, I guess that means yet another antenna (for 10 meters)!! I almost purchased a Radio Shack HTX-10 10-meter rig on ebay, but decided to try the CB set first. I could put up a PropNet probe station fairly easily, albiet at low-power.
Hal, are you ready to try a sked on 40, 20, or 17 meters?
----- Original Message -----
From: Terry Fox
To: tacos at amrad.org ; Bruce Brown
Sent: Thursday, August 24, 2006 9:32 PM
Subject: another productive day in the attic
So it was rainy and cooler again today - for only the second time since I moved here. That called for more attic antenna work. I installed two 2-meter ringo rangers, and a dipole for 18MHz. This brings the antenna total (so far) to: 2 40-meter dipoles, 90 degrees apart. One seems a little flaky. 2 20-meter dipoles, 90 degrees apart. 1 30-meter dipole, hopefully oriented toward DC. 2 2-meter ringo ranger antennas (one on FM rig, one on FM/SSB rig) Next comes some random wires for the antenna tuner(s). Last weekend was the North America QSO Party, and I tried my luck for a few hours Saturday night on 40 meters. The higher dipole (which is flaky) seemed to work great for an hour or so, then I noticed the rig was backing off. Hooking the MFJ antenna analyzer up, I found it's SWR was very high on 40 meters, it was now resonating around 6.4MHz. Wierd. It still worked better on receive than the other 40-meter dipole, so i used it to receive, and the other one to transmit. Sometimes I ended up using it to Tx as well, but ran the power down quite a bit. On Monday I checked it, and it was tuned to 7.15MHz again. More wierd. I am using RG-58U, and an MFJ balun on that antenna, and I suspect one of the two are probably acting up. I've ordered new coax (mini-8), too bad it didn't show up today.... I did not call CQ, but answered other hams. I think I talked to over 70 stations in 3 hours, and almost everyone that I heard, I could work as well. 33 states in 3 hours, not bad. Several good reports from stations. I guess 100watts into a diopole is still OK. Included were CA, OR, WA, UT, DE, VA, NY, CO, ID, IN, etc... I have not tried the 30 meter dipole with actual RF yet, that comes next. Hal, if you want to try that freq (18.140 I think), I now have an antenna for it. Anyway, that's my report and I'm sticking to it. Terry
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