FW: [AMPS] TL-922 Filament Transformer Protection

[Peter Chadwick]

> Rich says:
> 
> >?   page number?
> 
> pp439 - 442, 3rd edition
> 
> >Are you saying that less L in R-sup tunes the anode resonance 
> >lower in freq.?
> 
> No.
> 
> >?  Are you saying that it is impossible to create a broader resonance 
> >with one capacitor and two inductors that have different amounts of L, 
> >that are not mutually-coupled?
> 
> Yes, with the proviso that the two inductors have a high enough Q that
> circuit Q is not degraded. Draw a phasor diagram. Note that my definition
> of resonance is 'applied volts in phase with applied current', however.
> 
> >The damped-wave VHF ringing in the anode circuit can not pass through 
> >the lowpass tank.  
> 
> A 10m pi network will give about 80dB attenuation at 200MHz. I can see
> harmonics - they get through. Or are these 'ringing oscillations' (call
> them that to avoid confusion - one problem with e-mail is that it is easy
> to leave out a word inadvertently and then have endless fun clearing up
> misunderstandings!)
> so far down that they can't be seen? If so, how can they have enough
> amplitude to flash over bandswitches?
> 
> 73
> 
> Peter G3RZP
> 
> 
> 
> 

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