> Zero grid-fil resistrance incicates a bent filanment helix touching the
> grid. (Photo in September, 1990 *QST*, and on my Web site) Either the
> amplifier has been operated aeronautical mobile in an acrobatic airplane
> or the filament was bent by EM force as the result of an intermittent
> oscillation condition c. 155MHz. However, grid-fil shorted tubes
> usually draw high anode current. // Does this AL-80A have
> "neutralization" ? What is the measured resistance of the vhf suppressor
> resistor?
>
> //I think he meant "infinite resistance," not "no resistance," since he
> later posted that the tube anode is turning red, and he used a 100K Ohm
> meter to make the measurement. -WB2WIK/6
>
>
> cheers, Carl
> >
> >
> >_______________________________________________
> >Amps mailing list
> >Amps@contesting.com
> >http://lists.contesting.com/mailman/listinfo/amps
> >
>
>
> - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
> www.vcnet.com/measures.
> end
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
|