Topband: Loss Question

[donovanf at starpower.net]

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" <wes_n7ws at triconet.org> 
To: topband at contesting.com 
Sent: Thursday, October 25, 2018 6:33:59 PM 
Subject: 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, donovanf at 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 question remains the same: 
> 
> 

> 
> 
> 73 
> Frank 
> W3LPL 
> 
> ----- Original Message ----- 
> 
> From: "Robert L. Chortek" <Robert.Chortek at berliner.com> 
> To: donovanf at starpower.net 
> Sent: Thursday, October 25, 2018 6:00:48 PM 
> Subject: Re: Topband: Loss Question 
> 
> 
> 
> That's a GREAT calculator Frank. Thanks again! 
> 
> 
> 
> 
> From: Topband <topband-bounces at contesting.com> on behalf of donovanf at starpower.net <donovanf at starpower.net> 
> Sent: Thursday, October 25, 2018 10:52 AM 
> To: topband at contesting.com 
> Subject: 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: 
>> 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 
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