[AMRadio] Max power off from plate current dip problem 32v1...

[ka1iic at prexar.com]

Hmmmm...  The rig is taking off... for some reason....  perhaps some
part has bit the dust...

Oh course it doesn't 'take-off' in the tune position onlt in the 'operate'
position...  Makes no difference between the 600 or 700 volt positions...

I switched tubes with all the replacements I have (5) and the problem is
still there...  something is amiss...

Maybe the leads are not dressed properly...???

Ideas???

73
Vince
ka1iic


Man... I hate these types of problems....

On Tue, 25 Jun 2002, Brett Gazdzinski wrote:

>
> Vince,
> >From memory, the 32v series are not neutralized.
> My 30k-1 was not, I don't think the 32v3's are.
> My 813 rig is not.
>
> I don't think its needed with tetrodes.
>
> I did add it to the 30k-1 as an experiment, and it seemed
> to do nothing at all, at least on the lower bands.
>
>
> Then collins went nuts on the kwm2a and neutralized everything!
>
> Its quite normal to have peak power slightly off from
> resonance with un neutralized rigs.
>
> With my 811 push pull rig, everything acts like
> it should when the neutralization is correct.
> Peak power output is at dip, and the grid current
> is at max (I think).
>
> With the non neutralized rigs, grid current does not
> peak or dip at max power out or resonance...
> This will effect cathode current more than plate
> current on the meter, as cathode current measures
> grid current along with screen current (in tetrodes).
> One of the reasons I like to meter everything separately
> and simultaneously.
>
> Brett
> N2DTS
>
> >
> >
> > Hi Guys...
> >
> > Got a problem with a Collins 32v1... seems the maximum power
> > out occurs
> > at a place away from the 'current dip'...  (just off of dip...)
> >
> > I'm measuring power out via a resistive dummy load and RF ampmeter
> > in-line...
> >
> > Is this a neutraization problem or what???
> >
> > Thanks in advance
> >
> > 73
> > Vince
> > ka1iic
> >
> >
> >
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