Re: Flyback farm?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "David Speck by way of Terry Fritz <twftesla-at-qwest-dot-net>" <dave-at-davidspeckmd-dot-org>

I believe that the pots adjust voltages taken off a voltage divider from 
the main HV output, to feed the focus and brightness grids of the CRT. 
 I don't think that they will affect the main output voltage.  However, 
slight differences in output voltage would matter little when the system 
is under load.  Previous posts have mentioned paralleling neon sign 
transformers of different voltages with little performance loss.  I know 
that flybacks are different, but I bet that small differences in output 
voltage wouldn't be a problem.

IF they installed all the diodes with the same polarity, (which they 
certainly should), then you should be able to parallel these units for 
higher current.  Most of the time, builders ignore the original primary 
windings, and put 5 or 10 turns of new primary wire on the core to drive 
the coil.  If the new primary wire were well enough insulated, I'd bet 
you could series two or perhaps more coils for higher voltage output, as 
long as they were also phased the same way.  You'd have to float the 
cores to avoid breakdown problems.
Dave
G2-1170

>I have a number of flyback transformers all with integral rectification and
>would like to know whether or not these can be paralleled for extra current
>output.
>These newer flybacks have two pots on the side for focus and brightness and I
>would be interested  to know whether these could be adjusted to set the
outputs
>to equal voltage in a circuit where a 555 oscillator drives several flybacks
>via separate transistors.
>  
>