[ARC5] TCS 50-Ohm Matching Configurations.

[Bob kb8tq]

Hi

Pretty simple to do it the old fashioned way if you have the ranges of all the parts …..

Bob

> On May 11, 2018, at 7:19 PM, Tim <timsamm at gmail.com> wrote:
> 
> Could the TCS output network components and various antenna/load combinations be modeled with SPICE?  Then various interface networks be tested and optimized for max power transfer/efficiency?  Been a  long time since I could do that, and I no longer have access to the software.
> 
> I think the "solution" is in the math...no?
> Tim
> N6CC
> 
> On Fri, May 11, 2018 at 6:08 AM, Brian Clarke <brianclarke01 at optusnet.com.au <mailto:brianclarke01 at optusnet.com.au>> wrote:
> Hello Dave,
> 
> If the output impedance of the TCS is non-reactive and less than 50 Ohm,
> there is just no way to match to a 50 Ohm load using capacitors. I used to
> teach this stuff. Presently, I'm preparing a presentation on the design of
> antenna coupling units for my local amateur radio club.
> If you tell me, even  approximately, the output impedance of the TCS, or the
> ARC-2, I can produce for you designs that will work properly. If you want to
> use the TCS over several frequencies, tell me those, too.
> 
> 73 de Brian, VK2GCE
> 
> Brian Clarke
> BE, MBA, PhD,BOCP, CPEng, Fellow Eng Aust
> 
> On Friday, 11 May 2018 9:51 PM, Dave said:
> 
> Yesterday, I took a few minutes to test three of 
> the suggested capacitive matching methods which 
> adapt a 50-Ohm non-reactive load to the output 
> of TCS and similar transmitters.  The ARC-2 is 
> on the bench and it has an output circuit similar
> to the TCS, so used that for the test.  
> Can get some time to do this on the TCS 
> if anyone is interested.  This wattmeter has not
> been calibrated in some time, so take these 
> Power readings as relative.
> 
> <snip>
> 
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