Look at it as 2 ground planes with the lower feed point 1/4 wave above ground along with its elevated radials which should make it pretty much ground independent according to what has been published
Would shielded CAT5 be useable as a Beverage feed? It would be easy enough to match with a binocular core at both ends and I just happen to have about 300' doing nothing. Carl KM1H I've not heard tha
It is also used in much smaller LV transformers such as filament and welders. Carl KM1H Try a large transformer shop. 5kw and up transformers often use it. I've bought round magnet wire from temcoind
Back about 20 years ago K1MEM (SK) and I worked about 20 miles on 160 with Heath Cantennas in the basement at both ends. Both rigs at 100W. With no band noise the pee weak signals were perfect copy.
I would think a 5/8 would be good for the various 160 contests where a lot of contacts are short distances and the extended groundwave plus some power at 40 degrees could be useful. Wth 3 antennas, a
In the late 60's I made a coaxial capacitor from a length of RG-17 to supply most of the C for a 40M Bobtail. A little too big to fold and the losses were not even worth thinking about. On 160 with a
Ameritron sells the 170pf doorknobs used as input padders on 160 but they arent cheap. The value isnt that critical. Carl KM1H I have a Drake MN2700 so I can at least get the amp to work above 1870Kh
Ive had an early and late K3 here on loan and have kept my TS-950SD. What Im really looking for is a TS-950SDX. One thing Kenwood does better is the RX/TX audio on SSB in particular and Ive had a 830
I use military WD1A telephone wire which cost almost nothing but UPS for a 1 km unused reel. At 500-750' for Beverages the extra RF loss tilts the wave more and and has excellent directivity as 2 wir
Here is Toms review on the MFJ-1025 along with his modifications to improve it. After doing the mods and using it extensively Im totally happy with it used only on Beverages and BOG's and have no BCB
Interesting timing Bruce! Last week I had noticed my NW/SE 2 wire Beverage acting funny, poor F/B in particular along with it being noisy. It turned out to be the ground rod clamp had loosened, the s
Ive been using a 6AH6 in the VFO and regulating the screen and plate with a 120V 5W zener and suitable dropping resistor and a 47uF 'lytic with a .01disc. Grid drive is still sufficient for 100W+ on
It shouldnt be too hard for some to install a wire mesh of plastic coated rabbit fencing below the antenna, after a few months the grass will grow well past it allowing mowing. I did a variation at a
That gives only a 509 Ohm reactance at 1800 Pete. Going to an oft suggested 100uH raises that to 1131 which is possibly sufficient. I use 220uH for a 2488 XL simply because I have a bunch from a hamf
Some of my best Antarctic area contacts have been with a horizontal antenna and the very best had the apex at only 50' and the end at 3....blew the pileup away with one call and was told later at Day
The large Bird dummy loads use oil up into the low microwave region. Carl KM1H -- Original Message -- From: "Tom W8JI" <w8ji@w8ji.com> To: "HAROLD SMITH JR" <w0rihps@sbcglobal.net>; "Shoppa, Tim" <ts
The 3" line sections will handle more (-; And as many BCB and other commercial stations are being dismantled it is available at scrap prices or less. I have several large rolls of 1 5/8" here for sal
Very true but the RF is still in the oil "dielectric" from the coax connector to the hot end of the resistor. Carl KM1H -- Original Message -- From: "Shoppa, Tim" <tshoppa@wmata.com> To: <zr@jeremy.m
Any idea how much top loading that 5 el 46' boom monster contributes? At a prior QTH in the 80's I had a 90' 25G toploaded with a 10-15-20M stack of PV-4 monobanders and about 18' of mast. The 20M bo
Looks like we dodged the bullet here also. Storms are unpredictable and go anywhere from right up the Hudson River valley to out to sea Watching the storm track it took a sharp right turn over LI, NY