If you lose a tube because of loss of filament current...loose socket or
whatever, then the input impedance to the amp would change and the Yaesu
would drop it's output power due to high vswr?
Chuck, KE9UW
> -----Original Message-----
> From: amps-bounces@contesting.com
> [mailto:amps-bounces@contesting.com]On Behalf Of Vic Rosenthal
> Sent: Friday, December 31, 2004 17:11 PM
> To: Jose R. Corteguera
> Cc: Amps Contesting
> Subject: Re: [Amps] Henry 2K Classic
>
>
> Jose R. Corteguera wrote:
>
> > I order 2 new tubes and
> > install and tune and load in 20 meters and with 90 W. drive of
> my FT-920 I
> > obtain 1000 watts. Outside anttena.
> >
> > I make 3 contacts in 20 and 15 meters, work very good, but
> the next week
> > start and no work, similar problem with the old tubes.
>
> Maybe there is a problem with one of the tube sockets. Sometimes
> the filament
> contacts become weakened by heat and do not make good contact.
> So you only have
> one tube filament working. If you can look to see if both tube
> filaments are
> lit, you can tell if this is the problem.
>
> --
> 73,
> Vic, K2VCO
> Fresno CA
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