Topband: Loss Question

[Chortek, Robert L.]

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<https://www.qsl.net/co8tw/Coax_Calculator.htm>
www.qsl.net
Here's a quick line loss calculator to use Note that the simple program used for this web page gives a very close approximation for additional losses due to SWR.





________________________________
From: Topband <topband-bounces at contesting.com> on behalf of Wes Stewart <wes_n7ws at triconet.org>
Sent: Thursday, October 25, 2018 11:33 AM
To: topband at contesting.com
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:
>
>
> 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: "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<http://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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