I'm looking for a guy who works for a company who does work with RFID in a factory setting. Have no idea where to look so was hoping one of the TT readers may be in that biz. Please contact me OFF L
This is interesting Steve. A pair of termination resistor values are handy depending on the activity and your comment below suggests that application. I live in the middle of the US and while a hig
The QTH is in NY? That sure sounds like a "challenging environment" for any 80m beam. A 4SQ will be a rock star from NY (contesting point of view) and will have only about 1% of the environmental s
Is that the RAK or BIG RAK? I have a pair of BIG RAK SPID here which have worked great in the 2 years they are up. One of them has a 2 element moxon-like 40m JK, a full size homebrew 30m and a 6 ele
If the mixing product is internal to the rig, the filter will help. What John is talking about is rectification/mixing occurring outside somewhere (rusted metal contact, something weird but not infre
As you rotate the top antenna, what happens to the SWR on the bottom antenna? 73/jeff/ac0c alpha-charlie-zero-charlie www.ac0c.com On 4/6/20 10:20 PM, K9MA wrote: I just put up the W3JK C3S-JK on a s
And your umbrella policy - the one that will come in handy in the event a personal liability case is filed. 73/jeff/ac0c alpha-charlie-zero-charlie www.ac0c.com Fred, Not sure of your applications fo
I had not seen it either. Then again, I'm about as far as an "experienced hand" as you can get. But one of the towers I put up out here in 2018 exhibited that unscrewing thing right before my eyes.
Tony, I used WD1 for 4-square control wire out here for years when I had control wires laying on the top of the ground. It's incredibly tough and stood up with a bunch of other el-cheap-o wire I had
When I see this thread, it brings back memories. Doing this accurately is far more difficult than one would think. If you come away with a "how hard can it be" - then you are probably not consideri
Another factor is the width of the band. I have a homebrew 3-element 30m full size + 4-element 17m combo that uses a conventional hairpin match on both bands. The 12m is a similar hairpin matched t
A 3 element beam puts the feedpoint near the center and likely within grasp for a bit of tweaking from the mast. I view it as the right tool for the job. An OWA is a good pick for the wide band HF.
Working great here for the last 10 years with DBF. 73/jeff/ac0c alpha-charlie-zero-charlie www.ac0c.com On 5/18/20 5:40 PM, Pete Raymond wrote: I plan to run LMR 400 up to the top of the tower, and t
I don't think the water is an issue for the foundation, but I can say from personal experience it sure can be a headache with respect to INSPECTION if that's needed prior to the pour. Inspection was
Don't discount the participation of other wires, antennas or metals in the area. Everything in the near field will participate to some extent which is why deep modeled nulls seen are often hard to s
I have used a diamond cutting wheel on a Ryobi grinder and that makes a slick portable and fast cut on EHS of any size. PLus about anything else you may want to whack down of the metal variety... 73
Given those constraints, I would take a 4SQ over whatever ground I could manage vs. about anything else mentioned. 73/jeff/ac0c alpha-charlie-zero-charlie www.ac0c.com On 7/7/20 9:50 AM, Bill via Tow
I've used shortened elevated radials in a few projects. Made sense to me - but anyone who knows me will confirm I'm not the sharpest knife in the drawer. Started out with radials that were a bit sho
Inquiring and motivated minds would want get on the N6LF web site, find the QEX series on elevated radials by same, and dig into the secrets of the mystical elevated radial, laid bare by N6LF through
Note this assumes a certain soil, consistent soil, 8' height and 80m frequency - some other charts show the interaction of these variables with gain so some interpolation of the various charts may be