[AMPS] Amp opinion/infomation requested ASAP!!

[John Fielding]

Hi - a lot of antenna tuners are in fact high pass networks, so instead of providing
suppression of harmonics you do the opposite!!

John	ZS5JF

----------
> From: Jon Ogden <jono@enteract.com>
> To: km1h@juno.com; amps@contesting.com
> Subject: Re: [AMPS] Amp opinion/infomation requested ASAP!!
> Date: 30 March 1999 12:40
> 
> 
> >I do not own an antenna tuner and have no need for another device of
> >questionable efficiency.
> 
> I understand why folks do this, especially after having some arcing 
> problems in my tuner on 80m during the WPX contest (had to do an 
> emergency cap repair on my output cap in the tuner - a plate had some 
> serious meltdown!).  However, there are a couple of reasons why I like 
> the concept of a tuner.  For one, it gives an additional layer of 
> harmonic filtering.  Second, low pass filters are designed to have their 
> lowpass response based on a 50 Ohm input and output and third, power 
> meters are pretty much designed the same way.
> 
> So how do you get around this?  Having a power meter on a non-50 Ohm 
> system probably isn't a big deal.  But I think it could be a big deal 
> with the lowpass filter.  Or do you not run a lowpass filter and count on 
> the harmonic suppression in the tank circuit to be good enough?  
> 
> 73,
> 
> Jon
> KE9NA
> 
> 
> --------------------------------------------------------------------------
> Jon Ogden
> 
> jono@enteract.com
> www.qsl.net/ke9na
> 
> "A life lived in fear is a life half lived."
> 
> 
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