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Matt,
The large majority of potted flyback transformers available these days
have integral rectifiers built in, because they were intended for use on
CRTs. If they have a long lead with a round anode cap on it, it's safe
to assume that it has a rectifier in it.
It's quite hard to find flybacks without rectifiers in them these days,
unless you can find very old ones from tube TV sets. Those sets used
vacuum tube 1B3 rectifier tubes, 'cause effective solid state rectifiers
weren't available at the time.
The old flybacks without rectifiers tend to command high prices when you
can find them on eBay.
Removing the rectifiers from an epoxy potted flyback without destroying
the hair-fine end of the HV winding is a very difficult proposition.
Dave
On 9/28/2015 11:19 PM, Matthew Sweeney wrote:
This is correct I am building a 'tandem' VDG using both positive and
negative polarities. I picked up two of those HV negative ION generators
just because they were so cheap and I can mess around and see what I get.
I though about picking up some flybacks but they don't say anything about
having a built-in diode and I don't think it's easy to remove them. I
didn't see this deal and already ordered the ion generators, maybe I'll
check these out if the ion generators don't work as expected.
Thanks again for all the info it's been very useful.