[Amps] IM distortion and such

[Gary Schafer]

> -----Original Message-----
> From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
> Behalf Of Joe Subich, W4TV
> Sent: Wednesday, June 28, 2006 1:02 PM
> To: 'R L Measures'; amps at contesting.com
> Subject: Re: [Amps] IM distortion and such
> 
> 
> Rich writes:
> 
> > In my experience, VHF instability is independent of loading
> > since VHF never gets through a low pass Pi tank circuit.
> 
> Another canard ... VHF doesn't need to get through the tank
> circuit.  The damage is almost always at the input (tune padder
> and/or 10/15 meter coil contacts) that is the point that RF voltage
> is the highest.  Remember the output tank transforms a High-Z tube
> to a low-Z antenna ... high-Z is high voltage/low current.
> 
> 73,
> 
>    ... Joe, W4TV

Joe,

That is exactly Rich's point. The degree of loading has no effect on VHF
energy.

73
Gary  K4FMX