Hmmmm...
That does not seem to answer my friends question ...
However, the parasitic oscillations should be taken care by the grid current
measuring system that will shut down the amp if excessive grid current will
flow ( I did some homework, as you see) ... This should protect the tube
and tell you that something is wrong with the unit. Operating it further
under this conditions are not advisable.
As I said, my friend needed some other info than looking at your site :)
Alex, N2NNU
----- Original Message -----
From: "2" <2@vc.net>
To: "alex" <alex@sandlabs.com>; " AMPS" <amps@contesting.com>
Sent: Monday, December 03, 2001 6:31 PM
Subject: Re: [AMPS] AL1500
>
> >
> >A friend of mine, an F3... , (has no internet access) wants to know:
> >
> >Does anyone know what the AL-1500 is _really_ capable and under what
> >conditions?
> > ...
> // The AL-1500 is seemingly capable of VHF or UHF parasitic
> oscillation. The AL-1500 is - to my knowledge - the only commercially
> manufactured 8877 HF amplifier that does not use a parasitic suppressor,
> According to a number of Al-1500 owners, its 8877 has a high mortality
> rate. Several owners have reported that their AL-1500 had multiple 8877
> failures during the first 12-months. See Figures 24 and 24.1 on my Web
> site for details.
>
> cheers, Alex
>
> - R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures.
> end
>
>
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