Re: Topband: Radial length - Oops

Oops, dupe of part of Frank's reply. My apologies. Dan, AC6LA _ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

Re: Topband: Radial length

Also see this 2004 NCJ article by Al Christman, K3LC. http://ncjweb.com/bonus-content/k3lcmaxgainradials.pdf Dan, AC6LA _ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

Re: Topband: Radial length

Hi Buzz, This topic has been examined in detail over the years, such as: http://www.w0btu.com/Optimum_number_of_ground_radials_vs_radial_length.html http://ncjweb.com/bonus-content/k3lcmaxgainradials.pdf Do you know how many radials you might eventually install? Most of us stop at

Topband: Radial length

I have an inverted L with 30 existing radials and I just acquired 1500’ of 14 gauge copper insulated wire to add some more. SOme people say 1/8 wave is best bang for the buck versus 1/4 wave and now I read someone says 3/16 wave is optimal My existing are half 1/4 and half 1/8 wave on

Topband: VP6D

Went looking for them after finishing the 0300Z CWT on 160m. He was down the band some from where the CWT mob had been. I had seen somewhere that they were working up 2. Called him once up about 2 and worked him about 0410Z. Listened for a while. He was working a mix of EU and USA. Clearly a fine

Re: Topband: Loss Question

Wes, Sorry, I mis-spoke about which calculator is which... But my clear message remains unchanged: The additional loss caused by a 50 ohm coaxial cable feeding a 36 ohm load is insignificant at 1.8 MHz. 73 Frank W3LPL - Original Message - From: "Wes Stewart" To:

Re: Topband: Loss Question

I think Frank misspoke and meant this calculator was oversimplied: https://www.qsl.net/co8tw/Coax_Calculator.htm Types of Coax Cable and Line Loss Calculator - qsl.net www.qsl.net Here's a quick line loss calculator to use Note that the simple

Re: Topband: Loss Question

Whoa.   I said no such thing. The AC6LA calculator is definitely not simplified and/or inaccurate. Wes  N7WS On 10/25/2018 11:07 AM, donov...@starpower.net wrote: Hi Bob, As Wes points out, the AC6LA calculator is overly simplified and not very accurate. Despite that, the answer to your

Re: Topband: Loss Question

Hi Bob, As Wes points out, the AC6LA calculator is overly simplified and not very accurate. Despite that, the answer to your question remains the same: The additional loss caused by a 50 ohm coaxial cable feeding a 36 ohm load is insignificant at 1.8 MHz. 73 Frank W3LPL -

Re: Topband: Loss Question

Here's a bit more from Dan, AC6LA, about this: https://ac6la.com/swrloss.html Wes  N7Ws On 10/25/2018 10:49 AM, Chortek, Robert L. wrote: Hi Mike, That just goes so show you how little I know! I assumed, apparently incorrectly, that there was some loss IN ADDITION to the transmission line

Re: Topband: Loss Question

This is an alternative calculator: www.qsl.net/co8tw/Coax_Calculator.htm For 200 feet of RG-213 terminated in a 36 ohm load, the additional cable loss at 1.8 MHz is only 0.026 dB . 73 Frank W3LPL - Original Message - On 10/25/2018 10:24 AM, Chortek, Robert L. wrote: >

Re: Topband: Loss Question

Hi Mike, That just goes so show you how little I know! I assumed, apparently incorrectly, that there was some loss IN ADDITION to the transmission line loss (which I know how to calculate). In other words, I thought that if my transmitter was connected directly to the antenna there would be

Re: Topband: Loss Question

https://ac6la.com/tldetails1.html On 10/25/2018 10:24 AM, Chortek, Robert L. wrote: Does anyone know how much power would be lost if a resonant antenna with an Impedance of say, e.g. 36 Ohms is fed with 50 Ohm coax? Is there a good source where I could look up this kind of information?

Topband: Loss Question

Does anyone know how much power would be lost if a resonant antenna with an Impedance of say, e.g. 36 Ohms is fed with 50 Ohm coax? Is there a good source where I could look up this kind of information? Thanks! Bob/AA6VB _ Searchable Archives: