Gene, Not flaming, but this would be magic. Any wind loading with a component normal to the axis of the cable increases its tension. Lest Newton roll over in his grave, that tension imparts reaction
starting/running torque between the Ham 4 and TailTwister? Ray, There is no difference in torque output between the Ham IV and the Tail Twister. Both use the same drive motor and running gear ratios
Steve, I disagree. The differences in torque ratings which were published were likely based on the strength of the ring gear, which was upgraded in the past to the heat treated material. To the best
Hi David, A dipole in the optimum direction at about 85' will produce similar transmitted low angle ERP as your Mosley at 30', but should provide some advantage in hearing low angle signals. I once h
A dipole in free space can be mathematically shown to have a theoretical far-field gain of 2.14 dB over an isotropic radiator. Matt KM5VI Even if this is not the "right" forum i still think this is t
Mosley TA33 trap explanation: To the best of my knowledge, this is how it works... Inside the trap there are coils on each end. The inner element inserts into coil form such that the aluminum trap co
Best to model it first... saves time & heartache. Matt KM5VI _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contestin
Coax traps are relatively easy to make. Check out ON7EQ's website for more info & links to design software. Hope this helps. Matt KM5VI Hi all, The ARRL 160 contest got me interested in 160. I would
Try Bolt Depot - 3/8 dia lengths up to 4.625" in 18-8 SS. Matt KM5VI I have a similar problem - McMaster 3/8 and 1/2" hot dip galvanized u-bolts regular length are too short and extended length are t
Hi Grant, What type of matching network are you using? Does it have BOP mode and if so, is BOP achieved via inverting un-un or external phase line? Generally speaking, the distance from the match to
Spot on John. As the phase angle between a single stacked pair increases, the high angle lobe starts to grow, and the low angle lobe starts to deteriorate... but not at all in a linear manner - quite
... some more Mosley bashing... 2014 ARRL DX (SOHP): 1.3M, 5th place regional, 3rd place in W5 2014 CQ WPX (TB/SE) : 4.9M, 2nd place USA, all-time prefix record holder for W5 in TB/SE 2014 CQ WWDX (S
1/12 - 50/75 in series works fine. KM5VI I am using coax intended for Cable TV use. It's 75 ohms and i am using it exclusively with a tuner. I found this article which may be of interest. http://www.
No one else has offered up anything so thought I would throw in my 2 cents worth... Draw out a 1-line schematic of your station equipment set-up. Show ALL of the wiring connections. Include all house
Personal experience... TA33M will handle legal limit key down no problem. TA33JR will fry the drive element traps at 1kW RTTY, as a friend of mine unfortunately discovered some years ago. The JR will
Hi Mel, If you are serious about wanting to know, my suggestion is to model your site installation using HFTA, which comes with the latest ARRL Antenna Handbook. HFTA should be able to give you a goo
Thanks Paul for Good advice... I found Microdem rather cumbersome to install & set up and was not particularly intuitive to use... Matt FREE detailed terrain data available via download for most all
In addition to YW, using a shorted shunt with a Smith chart has also produced reasonably good predictions for me. About 450 ohm shunt impedance on the chart seems to work pretty close for 1/4 inch ro
My experience with changing units in the options tab results in changing units for BOTH the terrain input and antenna elevations. I have also observed that the antenna heights displayed in the main w
Hi Doug, The lifting cable stress analysis is found on page 7 of the link that accompanied your message. The analysis shows the factors of safety in the cable tension as 15.2, 6.1, and 9.74 for secti