MFJ and Texas Instrument used this type of calculation for antenna Q. The other attachment is what some other people are using with their inverted using the K2AV balun and a Gamma match on bands othe
The thing works, I mean the shunt match works. what would be a good Q for just the coil? 300, 600, 900 Operating Q, what is the desired value? Whats your formula for that? Q of the operating antenna,
Thankyou Charlie. I got those Q numbers from http://www.m0ukd.com/Calculators/air_core_inductor_calculator/ Maybe a decimal point was left out. Thanks Tom -- Jim K9TF _________________ Topband Reflec
Could have saved more money with a Piece of RF-9913 or RG8 coax cable about 25pF per foot plenty voltage rating. Only thing can some one please help me on this, do I connect the center conductor on o
You could use Teflon tap, it is used on plumbing pipe threads to prevent leaks. Some one once told me that 1mill thicknes was good for 1K volts. -- Jim K9TF _________________ Topband Reflector
You can use Coax seal in a tube thats used to fill in the gap between coax connectors to keep the moisture, which has teflon. Put that on first then wrap with teflon tap to close up your gaps. To wea
My antenna is a 99 foot inverted L for 160M with 95 short radials 2000 feet of wire. What I am trying now is W8JI suggested modification design to improve the ATR-10 design by taps on the coil for ad
Tom W8JI made some measurements back in 1997 on the ATR-15 when it first came out. Not sure how this will print out. * * *The ATR-15 measures as follows for load R and loss on 1.8 MHz: 12.5 ohms 21.8
Sorry I need to add some thing I left out. The ATR-10 modification I am using is without the series capacitor sorta speak. The MFJ 989B is fed into a tap on the coil. Cause of the T network on the tu
Hi Paul http://lists.contesting.com/_topband/1997-01/msg00037.html You posted the comment from W8JI on a reply sorry about that. . No biggie. What the patent number? I would like to read more about i
That tuner is capable of all those combinations? http://www.freepatentsonline.com/4763087.pdf That is just a work of art. You can switch this to any combination or add caps or inductance. Looks to me
I understand least amount of inductance. I can email a Power Point file of what I have. if any one is interested. Just ignore my notes. They just remind me what I have done so I do not do over again.
What is the real or best guess what value this inductor has? This is what I am using. Edge wound coil is 1/2 inch wide, 1/32 inch thick stock, coil is 2 1/2 inches long,15 turns, 4.5 ID, 5.5 OD trans
City has a rat infestation. Digging all kinds of holes under peoples wooden decks. They did some construction work in the street and drove them out. They never addresses the problem before it happene
Our Cities rat issue is easting the underground TWC in chases in the street. Stupid critters even eat through concrete. IMT Ridged rusts through in Wisconsin soil around 15 years. Sked 40 or 80 Pipe
K9W was a well running machine. Wish I could say the same about this inverted L. It worked great on 160 and 40M at the beginning of the expedition and worked em on these bands. Tried on 80M and highe
What is making you believe you have a faulty 75 ohm coax? I would hang a 50 ohm dummy load on it at the end of the cable that goes to the antenna and load it to the same power level you have the prob
Vaseline will work keeps moisture out, non conductive. You can cover a lot of surface. Over years it drys out gets crusty. Vaseline is made of lanolin mostly, I believe. Neverseizes or anitseize comp
You do not flod the inside DAH! Coat the darn stuff on the ouside DAH! -- Jim K9TF _________________ Topband Reflector Archives - http://www.contesting.com/_topband