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Folks, I was doing some testing of a CHA-250B. I know some of you will call it a dummy load and not a good antenna; but lets put that aside and consider the performance difference I'm seeing in two locations. Initially I had it about 30' from the house near the ground attached to a metal fence...

Hello all, I'm revisiting this now that I've tested my fan dipole side by side with a vertical antenna (specifically the Comet CHA-250B). I moved my fan dipole to the top of a mast above the house so that its 25' above the ground. Its about the same height as my CH-250B that I'm testing with...

Gary, On your question about an external tuner; I could buy one if needed. Are you thinking an end-feed antenna from house to a remote tree? -J

Thanks for info and encouragement. I guess I have more work to do :). -Jeremy

Guys, Sorry for the delayed response. Thanks for the suggestions. I'll try moving it first out from under the eve to my mast that has my 2m/70cm antennas. At least that will put it out into the open for starters. Gary, I have no tuner; that's why I built the fan dipole to mitigate that. My...

Hi Gary, Thanks for the feedback. Most of the trees within 50' to 100' of the house I've cut down because of being sick trees. I'll have to think through what options I have away from the house. At this point, it would be a coax run 100' from the house just to get to some trees before I even...

I should also note,the fan dipole is positioned North to South given my house orientation. My 'window' to the sky/horizon (other than straight up) is to the North and to the West. East is blocked by the hill that towers 500' above me. South also is elevated several hundred feet. I'm not...

Perhaps propagation changes. SWR didn't change much after I mounted it under the eave (under eave to protect it from the weather). The only physical change was a slightly steeper inverted v shape to match the roof slope - around 5 degree more slope. The SWR moved up around .2-.3 reflected...

Folks, Hope all is well. Just getting started in HF after a long hiatus. Back in my old place, I used a simple vertical (A99) for 10 meters back when conditions were good (~30 years ago). But I lived in a flat area with a clear view of the horizon. I did pretty good with causal DX. Now, I...

I might note something, perhaps your experience has been different... It appears that the RF stages are tuned for the HAM bands and anything outside of that the TX power starts rolling off pretty rapidly. I don't have schematics, so I'm not sure how much of this is the PA deck and how much of...

Hi all, I decided to give this a shot on a new ft-857d. I followed the the procedure posted here but used hot solder instead of a pen. It works perfectly. I've transmitted into a dummy load on the originally locked out frequencies with no issues. Mine is an A2 model (off Yaesu box). Only...

Folks, I just put an Anytone 5888 on the bench to do a test and saw an interesting observation. I just tested UHF / 440 for 12dB SINAD, and I'm seeing around -117dBm. What is weird, is if I move the selected VFO over so my SINAD test is on the 'inactive' side (just monitoring side), I gain...

Which inductor is that? On the receiver module or the Active Antenna? I ended up replacing the sharkfin antenna on top of the truck. This is where the issue was. Its an integrated GPS and XM antenna with active electronics. I can't seem to find the data sheets on the chips, but I assume one of...

Well again it might have been coincidence...but its seems likely that TX on my mobile rig did this. I'm wondering what other folks have done to protect against this if you have an XM radio antenna up on top of the truck and you have a HAM antenna up there too. I imagine the LNA on the XM...

Folks, I noticed this past week that I blew out the front end of my XM/Siruis receiver in my truck. It might be just coincidence, but by 2m/70cm antenna is only a few feet away from the XM radio receiver. Has anyone experienced this? Since XM is up in the 2GHz range, I wouldn't have thought...

Hi BBI, Did you ever check on a Tracking Generator and SA to see what the frequency response curve is on it? I'm curious of how fast things roll off on the upper UHF range. -J

I prefer not to use a switch...just a passive filter / diplexer to do the job. But it appears that the only thing commercially available is a split with HF/ VHF-UHF where UHF max's out at 470Mhz. There are triplexers that go into the 1.2G range, but then they combine HF and VHF; UHF is on the...

Folks, Couple of questions and I was hoping someone had some experience in this area they could share. First off, I would like to use two (maybe a 3rd) antennas with a single feedline. I see a ton of diplexer's and triplexers out there at a reasonable cost. The only concern I have is that most...

Its not that bad. When I took the back cover off to inspect, its in 3 pieces and the front portion is glued; so you have to try and pry the adhesive loose to get to the front needle assembly. Its a crappy design...but it is what it is. Thanks for the pointers. At least the needles are not...

Thanks for the pointers. It looks like it was indeed mostly static. I did spray it down with Windex and wiped, and that seemed to help a lot. I still could tweak the needles back down to zero a bit; but it looks like the front face is not easily accessible. I took the back cover off and it looks...