Re: [TCML] Looking for a 1.8nF 50V (Polypropylene 2%) Cap

[Brandon Hendershot <brandonhendershot@xxxxxxxxx>]

Thanks Carl,
Found my cap and got the tuner completed. I'll let you guys know how it works and if (when? :P) I need help using it.
Are there any other ways to squeeze more output out of the coil besides getting it in tune? Possibly a different spark gap? That's about all I'm willing to replace without just upscaling it all to a bigger better coil.
Thanks again,
Brandon

On Mar 7, 2011, at 3:01 AM, Carl Noggle <cn@xxxxx> wrote:

> Hi---
> 
> Try Richardson Electronics for small quantities of these polypropylene caps.
> 
> ---Carl
> 
> 
> 
> 
> 
>> Hi Gary,
>> 
>> Thanks for the info. Sometimes I get a bit too strict on adhering specifically to the specifications on finicky projects like these. Especially with my history with 555 timers I'll keep scrounging around and see what I can't find.
>> Oh, nearly forgot, I managed to grab a TLC555 instead of a LMC555, is there any difference? The part numbers match up, but I'm still unsure...
>> 
>> Thank You,
>> Brandon
>> 
>> On Mar 6, 2011, at 9:47 AM, Gary Lau<glau1024@xxxxxxxxx>  wrote:
>> 
>>> Hi Brandon,
>>> 
>>> There's nothing sacred about the 1.8nF value.   IF you were planning on
>>> using the frequency dial image that Terry provided, it would be a good idea
>>> to use exactly the same components that Terry did, but even then, I would
>>> recommend doing your own dial calibration with a frequency counter, since
>>> audio pot's are not typically high-precision devices.  My 10K pot measures
>>> 9.38K.
>>> 
>>> Otherwise, you can use anything remotely close.  For the cap. I used a
>>> 1600pF 5% mica cap.  No reason you couldn't series-parallel whatever you
>>> have in your junk box to achieve something close.  For the bi-color LED, I
>>> just used two red LED's back-to-back.  Probably the only really important
>>> thing is that the cap be temperature-stable, not ceramic.
>>> 
>>> Regards, Gary Lau
>>> MA, USA
>>> 
>>> On Sat, Mar 5, 2011 at 10:58 PM, Brandon Hendershot<
>>> brandonhendershot@xxxxxxxxx>  wrote:
>>> 
>>>> Hi Everyone,
>>>> 
>>>> I'm working on a copy of Terry's Tesla Coil Tuner
>>>> (capturedlightning.org/hot-streamer/TeslaCoils/Misc/TCT/TCT.htm) and
>>>> there's this capacitor in the parts list (1.8nF 50V Polypropylene 2%)
>>>> and I can't find anyone NOT selling them in bulk... So, I imagine
>>>> somebody else had the same problem and actually bought some, lol. Do
>>>> we have any of those folks here that are willing to sell me an extra
>>>> cap?
>>>> That, or does anybody know of some mysterious vender hiding in the
>>>> deep dark depths of the internet that's selling them to the general
>>>> population? Anything will do really, just as long as I don't have to
>>>> go buy a hundred just to use the one and turn around and try to resell
>>>> the others, lol.
>>>> 
>>>> Thanks List,
>>>> Brandon (H. in case the other Brandon decides to chime in :))
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