RG213 is specified with 1300W on 6m 73 Peter Maybe he means on the inside:-) Wes N7WS flexibility. resistance on seen _______________________________________________ ________________________________
Yes, the current heats up the dielectric around the center conductor. RG393 with the same conductor size and its PTFE dielectric is specified at 9500W on 6m. 73 Peter MIL-C-17/74 (RG 213 spec) sort o
7/8 inch Cellflex is a quarter of the price of RG393, good for 12.3kW on 6m, but hard to use as a rotator loop, more then double the diameter and far smaller bending radius. 73 Peter If I were to spe
I am aware of that, power levels were referenced for 100% duty cycle and 40°C ambient temperature. 73 Peter See my comment re: duty cycle and conditions of installation. 73, Jim K9YC 6m, ____________
I donīt think that RFS Cellflex 7/8" is mentioned in MIL C-17. 40° at the specified power level are given by the manufactor. 73 Peter Mean Power rating in kW 0,5 MHz 85 at 40°C ambient temperature 1
SCF12-50JFN by RFS is probably half that price. https://www.rfsworld.com/WebSearchECat/datasheets/pdf/cache/SCF12-50JFN.pdf 73 Peter The outer jacket on LMR-600UF..and also LMR-400UF is rubber. The r
Yes, thatīs what I use, Nylon or POM plates with a hole cut for the mast. I also still use a thick bronze bearing on one tower. All weight is on the rotator and I use another shelf above the rotator
Yes, the black UHMW will be the best for that purpose and 5% cheaper then POM (Delrin), POM-C should be used black only as well. 73 Peter When I need a top plate radial bearing, I use black UHMW whic
Yes, the cables are identical, I use both. 73 Peter I have several Cablewave 738801 Type-N female connectors for FCL12-50 cable. Anyone know if these connectors can go on to Andrew LDF4-50A cable as
That 130km/h figure is not the wind survival but the reference wind velocity for the wind load of 500N. 130km/h is the standard reference for stress calculations in Germany used for all locations exc
That is hard to believe unless there is too much interaction between the antennas and makes them useless. Or all antennas except the Cushcraft are wrong assembled. Are all these antennas at the same
Everything can be calculated and designed with help of EZNEC. That's what I did for my 3-element fullsize yagi which works very well for me. I optimized it for best front to back within the most acti
The statement is: " Stick with RESONANT antennas fed with coax and chokes", not "An OCFD is not resonant"! Antennas not fed symmetrical and choked CAN pickup more local noise. If you donīt have any y
Hi Rob, There is an absorber mount available from Yaesu which might solve the problem: https://www.dxengineering.com/parts/ysu-ga-3000?rrec=true 73 Peter Hi Group, A couple questions. I installed a
I used Andrew connectors on 1/2" and 1 5/8" Cellflex cable by RFS without problems, I guess the 7/8" Andrew connectors will also fit LCF78-50 as do connectors by Rosenberger, Eupen, Wisi, Spinner, Te
The stacking gain on 20m will be less then 4dB. 73 Peter <There was an op in Texas who mounted 4 of these on a rotating tower. There <was an article in one of the ham magazines some years ago about i
With that stocking distance on 20m you will be lucky to get 3dB gain. With 21m distance between 20m antennas you might reach 5.6dB 73 Peter _____ From: jim.thom jim.thom@telus.net [mailto:jim.thom@te
Indeed, with all 4 antennas in phase, the combined radiation angle of that system is almost that of the highest antenna alone. I stacked my 20m 5/5/5 at 147, 85 and 33 feet. 73 Peter There are two di
I am just considering the maximum possible stacking gain, not the different elevation angles. 73 Peter Take a look at HFTA using flat ground ... A stack of 3 element yagis at 35/70/105/140 shows betw
Sure, I turn RG217 and LCF12-50 on Versatower crank-up. Use also RG218 as rotator loop on fixed tower. 73 Peter DJ7WW Probably tape and some good cable ties would work. I am wondering if RG217 is fle