I have made sweeps of my 160m T on many occasions as I tuned it, added elevated radials, and then installed a remote series capacitor switch to tune the entire band per a W8JI suggestion. There was n
Steady S7 here in Redmond, WA at 3:30 PDT on a T loaded vertical. My receive 4 sq puts it strongly to my NW of 47.68N x 122.01W QTH No loop to resolve it further. Grant KZ1W carrier on 1810.8 MHz in
Nothing heard on either freq. Grant KZ1W Redmond, WA On 3/25/2014 1:57 PM, Herbert Schonbohm wrote: Lee you might check the AM band and see if there is a detectable carrier on 603.6 or 905 Khz as som
Thanks to all who provided info and suggestions. It appears that a practical solution to be able to use "old" Phillystran might be to use wire rope saddle clamps at the right quantity and tightening
I use 9 gauge Al electric fencing wire for elevated radials among my trees. It is pretty tough stuff, as 3" branches have fallen on it without anything but a little stretch. it doesn't stretch much w
Ice is an interesting question. I'll speculate that it doesn't matter much since the sheath is pretty flexible and the Kevlar has a small sensitivity to moisture. The Kevlar demonstrated very high cr
I recently concluded testing of wire rope clamps (clips) on "old" parallel Phillystran (PS). The old PS does not work with the current PS guy grip type of termination. These tests showed that clamps
re elevated radials: For a thorough analysis of radials check out antennasbyn6lf.com for Rudy's work. Assuming farming happens, perhaps you can get them high enough to make the owner happy. Mine are
One issue not mentioned for radials on rather than in the ground, is the nylon outer sheath on THHN doesn't like UV, so after a year or two the snake sheds its skin and makes a mess. PVC just gets dr
At TX5D, Raivavae, Australs FP, I could real time A/B a vertical at the high tide line on 15m vs one 100' feet back and got "1 to 2 S units better" for the beach one on the USA path about 7000km. Gra
In addition to my prior long term creep tests for loads to 11,000#, I've concluded a tension test to failure of the Crosby Spelter socket terminations for the older parallel strand Phillystran in 5/8
Over the past 25 years, at 3 QTH's, I've used thousands of feet of the synthetictextilesinc.com 1/4" and 5/16" and have been very happy with it. Tough, strong, and lasts a very long time (MA winters,
The smaller diameter (20 to 30mm) ball bearing sailboat blocks are $15 to $25 as I previously posted. Here is a slick block from REI for rigging ropes up to 15mm. http://www.rei.com/product/807414/ca
Have you checked the design with EZNEC? A little more top hat and you won't need a coil. I had an 80m top loaded 3" dia vertical 40' tall which resonated at 3.8MHz. A tweak of that model to 70' showe
I've had real Synthetic Textiles lines up 10 years and more. Some in CA sun, without significant degradation. OTOH, some "dacron" bought on ebay is likely a dacron-polypro blend and lasted only a few
In San Jose, CA I had a 50kw station on 1Mhz unobstructed line of sight 3 miles from my 80m vertical, and had good success with this 100w capable filter, used all HF bands for several years and no pr
The way to squeeze the most watt-hours out of panels and into batteries is with MPPT regulators. "Maximum power point" regulators that adjust rapidly to the real time insolation. A series regulator i
Jim, Would the type 75 material from Fair-Rite, be a better choice for 160 & 80 with 5 turns thru the 0.75" id clamp on? http://www.fair-rite.com/newfair/LowFreqSuppression.html your thoughts? Grant
Is there any advantage to open wire line construction vs the bidirectional coax Beverage that ON4UN describes? RG6 is cheap and strong with a copperweld core or use any other coax from CATV surplus t
I have the DX Eng 4 sq rcv and am amazed at how directive it is, 70' on a side, works well for 160 & 80, my Moxon beam is usually better on 40m. I bought 6' long (5/8, 1/2, 3/8 od) telescopic tubing