Discrete tube phaser

[harry]

Ok (what fools these mortals be...) check out the book by Groove Tubes
of guitar amp schematics ane get some ideas from tremolo circuits that did NOT
use LDR's...

Then check out a good psychiatrist, eh...
You boys need professional help...

H^) harry

danial stocks wrote:

> there must be a better way of doing things than LDR's these are just
> cheating.!:) we really need to be thinking in terms of inherent
> characteristics of tubes that can be used to advantage. such as a variable
> transconductance with grid bias or something like that. one thing was used
> in the old days for radio transmitter phase modulating was to vary the shunt
> resistance across a reractance ie tube functioning as a volt vari res across
> a cap.. seen the same thing done with fets.. I'll think about it a bit
> more..
> dan
> >Hi,
> >just that if you wanted to use 1950's technology you could  I think
> >[  I'm not a design engineer ]
> >use  Tubes , LDR's and neon bulbs to make a phaser .
> >you would have to put the neon bulbs and LDR's in a small case to stop
> >external light causing problems .
> >I was thinking of doing something similar a while ago , but got
> >distracted .
> >I know the Magnavox amp circuits are very cleaver how they work [ I
> >still don't totally understand them ].
> >I think the Univibe circuit is also interesting as the capacitor values
> >aren't the same in each stage , most other phaser circuits I think use
> >similar stages .
> >regards Peter
> >
>
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