[HomeBrew] She's a "whooper". . .

[Missouri Guy, N0TT]

> HOWEVER, Every time I key the transmitter, the B+ takes a "dive" 
> from 
> about 360 Volts static to 250 Volts (loaded to 40mA 6AQ5 Plate 
> current). 

The problem is that when the transmitter isn't being keyed, the supply 
soars to almost peak voltage with the light load, so adding a constant 
load such as a hefty bleeder resistor and/or a smaller filter capacitor 
will probably help. 

>   Since the same B+ point is used for both Oscillator and final, the 
> frequency takes a bit of a "dive" along with the B+.

Not surprising.  The oscillator supply should be well filtered
and regulated.  One of those little gas regulator tubes would work well.
Don't forget to add the usual dropping resistor between the B+ supply
and the regulator tube.  

Don't have the regulator tube?  Another trick is to isolate the
oscillator's
supply with a resistor and perhaps a series diode, then add a hefty
capacitor
to the oscillator supply.  Doing that will keep the voltage at a more
constant level with the light load.  

73,
Charlie   N0TT