Re: Topband: Post contest season: TX antenna vs RX antenna cros-stalk. What do you do?

2016-03-24 Thread Terry Posey
Hi Mark - I have not experienced K3 TX/RX antenna isolation problems with my station configuration. I expect that if there is an isolation problem with your rig's TX and external RX antenna routing/switching, that problem would be nearly impossible to quantify using your station's TX and RX

Re: Topband: Why do rodents eat coax?

2015-11-10 Thread Terry Posey
All of my transmission lines are buried except for the single coaxial cable that feeds my 6m long-boom Yagi. After 15 years, I have not experienced any problem with varmints chewing on any of my buried cables, despite being located in the dense North Florida jungle. However, the aerial coax

Re: Topband: 8 circle: DXE vs Hi-Z

2014-12-17 Thread Terry Posey
Bravo, John! Well stated on all points. No disparaging comments noted. I especially appreciate your discussion of RDF and what it actually means in practice. As you commented, in practice, RDF is calculated (EZNEC, etc.) assuming equal amplitude distribution of noise over all 3D free space.

Re: Topband: Submerging variable caps in oil as substituteforvacuum variables

2014-02-02 Thread Terry Posey
Dissipation factors for particular oils are found here: http://www.icrepq.com/icrepq'12/538-toudja.pdf I cannot comment on the accuracy of the data. Terry K4RX -Original Message- From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Tom W8JI The major issue with

Re: Topband: Shunt fed tower plus Marconi vertical phasing on 160 and80?

2013-05-30 Thread Terry Posey
...and reasonable instrumentation and a good understanding of what is actually going on. Difficult or hard is a judgment call from one's own particular expertise and experience perspective. Antennas are a wonderful interest area of amateur and professional radio. Experiment and enjoy. Read good

Re: Topband: Beverage antennas - Ticks

2012-07-23 Thread Terry Posey
Tom is correct. Ticks carry many bad blood bugs, both virus and bacteria. Here in buggy North Florida tick fevor is very common and it is not Lymes disease. Mountain tick fever, Texas tick fever, Southeast tick fever, the list goes on... Ticks are also the vector for spreading deadly

Topband: Radial Wire Source

2012-06-06 Thread Terry Posey
Consolidated Electronic Wire and Cable http://www.conwire.com/ sells bulk quantities of solid copper tinned wire, available in many AWG sizes. Prices seem to track copper commodities prices.image that. 73, Terry K4RX ___ UR RST IS ... ...

Topband: Antarctica 160m

2012-06-01 Thread Terry Posey
12-Mar-05 R1ANN de K4RX ___ UR RST IS ... ... ..9 QSB QSB - hw? BK