Re: [TCML] Terry Filter

["Paul Brodie" <pbbrodie@xxxxxxxxxxxxx>]

Hi Gary,
No, I haven't received it yet. It was supposed to arrive today but I guess the Christmas shipping glut has it held up. As soon as I get it, I'll write with better information. I haven't ever even actually seen an OBIT. All I do know for sure are the specs I was given and what the picture looks like. It looks nothing like any NST I have ever had or seen and I have owned a couple of Franceformers and seen dozens of pictures of many other types.

Thanks for the feedback but I would still like to know if OBIT's should use a filter, like the NST's? If they use a similar construction, like you say, then I am assuming that a filter would be in order. The only problem with this is that every time I assume anything, I get bitten.
Paul
Think Positive

  ----- Original Message ----- 
  From: Lau, Gary 
  To: Tesla Coil Mailing List 
  Sent: Monday, December 21, 2009 17:54
  Subject: RE: [TCML] Terry Filter


  Hi Paul,

  I myself have no experience (successfully) using OBIT's.  My only ill-fated experience was when I was a total newbie and thought I could series the outputs from two OBIT's.

  I can't think of any reason OBIT's would be intrinsically inferior to NST's.  Both have similar construction and specs, and both are current limited.  I would like to think (HA!) that OBIT's being in a more critical application, might be built a bit sturdier than something that just needs to light a sign?  Perhaps it's that the used OBIT's that I and others used were pulled by a serviceman for good reason, and may work just fine on a good day, but...?

  BTW, 9kV@50mA sounds unusual for an OBIT.  Every one I've seen is rated 10kV@23mA.  OBIT's typically have inconvenient HV terminals, designed to be attached directly to the oil burner.  Are you sure you don't have an NST?

  Regards, Gary Lau
  MA, USA

  > -----Original Message-----
  > From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
  > Behalf Of Paul Brodie
  > Sent: Monday, December 21, 2009 5:34 PM
  > To: Tesla Coil Mailing List
  > Subject: Re: [TCML] Terry Filter
  > 
  > Maybe neon sign transformers are better but I got this OBIT for $20 and I've
  > already built 2 neon sign transformer coils and as the Monty Python players said,
  > "and now for something completely different!"
  > 
  > So, that said, why do you believe NST's are better than OBIT's? I have no opinion,
  > having no experience with OBIT's but I have seen them recommended as TC
  > power sources many times by many different people. As usual, I'm just being
  > curious.
  > 
  > Oh yeah, are OBIT's current limited, like NST's or will I have to treat this the same
  > as I do the MOT's I have used?
  > Paul
  > Think Positive

  <snip>
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