[Hallicrafters] HT-33 Plate Current Dip Question

[Peter Markavage]

What are using for a load (50 ohm dummy load or an antenna)??
Pete, WA2CWA

On Wed, 4 Feb 2004 12:29:31 -0600 "PETER A. STRATIGOS"
<peters7 at mindspring.com> writes:
> I am in the processing of bringing up a HT-33, the unit using two 
> 4CX300As as finals.  The gird tuning adjustment shows upwards of 100 
> ma of increase as I adjust the grid tuning.  However, when I attempt 
> to adjust the Plate Tuning for a dip, per the manual, I detect 
> barely a 10 ma dip, if that.  Even though the plate current dip is 
> very slight when running 400 ma, the power output increasing to 
> roughly 350 watts our with about 2 watts in on 80 meters.
> 
> Tuning based on the dip is very difficult.  Does anyone have any 
> experience tuning one of these amps and can advise of the type of 
> dip I should be seeing and also what I should expect in the way of 
> output with a new set of 4CX300As?  Finally does anyone have any 
> thoughts on using 4CX300Ys in place of teh 4CX300As?  The Ys seem to 
> be able to handle a little more plate current but also have a 
> somewhat different plate capacitance?
> 
> Many thanks in advance for any help anyuone can provide.
> 
> Regards,
> 
> Peter N9HXW
> 

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