Re: [TCML] RF Ground and Brass

[Bob Wroblewski <bwroblewski@xxxxxxxxx>]

Hi Bart, Ed, Gary et al,

Would simply inserting various values of a small Bussman or Littlefuse inline type fuse from the secondary base to the ground cable yield some measurement results? These fuses have data sheets detailing the area under a curve (rms) energy required to reliably heat the contact and blow the fuse. Thus you would have a threshold measurement of base current without risking damage to measuring equipment (DSP scopes, etc).

Just a thought, I haven't been following this closely so if I'm repeating someone elses response, sorry.
It is an interesting discussion.

Bob Wroblewski
Dracut, MA


----- Original Message ----
From: bartb <bartb@xxxxxxxxxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Sent: Friday, March 7, 2008 9:16:12 PM
Subject: Re: [TCML] RF Ground and Brass

Hi Ed, Gary,

Yes, that's a good idea. Thermocouple is certainly a means of doing it.

Gary, I don't know if your interested in measuring base current, but if 
you are, I can send you a Pearson current monitor 1V=1A. Big donut type. 
Just feed the base through the hole. It's fitted with a BNC connection 
for direct connection to the scope. Just let me know and I'll be happy 
to send your way.

Take care,
Bart

Ed Phillips wrote:
>    Another thought on base current.  Thermocouple RF ammeters can be 
> found surplus for only a few bucks and they'd be perfect for measuring 
> RMS base current.  That's what guys used to measure antenna current in 
> "the good old days of spark".
> Ed
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