Discrete tube phaser

[danial stocks]

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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