[AMPS] runaway amp.

[Bob & Linda McGraw K4TAX]

Yes, I agree that an upward power drift is most unusual.

As to finding the problem, I've found that cooling the component with a
can of cool spray is more accurate than a blast of hot air.

73
Bob K4TAX

Ian White G3SEK wrote:
> 
> Pete Smith wrote:
> >
> >At 11:22 AM 2/22/01 -0800, dan hearn wrote:
> >>
> >>Another thought: The problem seems to be heat related. Create a source
> >>of hot air which can be directed on various components while the amp is
> >>creating dots from your keyer into a dummy load.
> >
> >An easier alternative might be to provoke the amp into the beginning of the
> >runaway process and then use one of the available cooling spray can
> >products to cool components till you find the one that reverses the runaway.
> >
> 
> W0YR will be off the list for a few weeks, so maybe we have to leave it
> until he can make some more tests.
> 
> The real puzzle is that the RF output drifts UPwards, which is quite
> unusual.
> 
> 73 from Ian G3SEK          Editor, 'The VHF/UHF DX Book'
>                           'In Practice' columnist for RadCom (RSGB)
>                            http://www.ifwtech.com/g3sek
> 
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