[Bulk] Re: [TCML] ANOTHER ONE DOWN, ANOTHER 37667 BITES THE DUST

Mon May 14 10:19:47 MDT 2012

Ebay seller Surplus Supply of Texas - (surplussupplytx)
been  nearly three years since they were selling them and
it doesn't appear that they've had any more since then.

David

----- Original Message ----- 
From: "Neon Tesla" <neontesla at gmail.com>
To: "Tesla Coil Mailing List" <tesla at pupman.com>
Sent: Monday, May 14, 2012 8:05 AM
Subject: Re: [Bulk] Re: [TCML] ANOTHER ONE DOWN, ANOTHER 37667 BITES THE 
DUST

> Hate to sound like a broken record...
> May I inquire as to where you got your 31915 Maxwells?
>
> On Sun, May 13, 2012 at 8:55 PM, drieben <drieben at att.net> wrote:
>
>> I got my Hipotronics caps (2) from the one and only Jeff Parisse
>> of KVA Effects himself. Cameron ended up talking me out of
>> one of them and then he also purchased one from Ed Wingate
>> at one of his Teslathons. Both Cameron and I now use those
>> .1 uFd, 75 kV rated #31915 Maxwells that I was mentioning,
>> since we've both suffered a failure with the Hipotronics caps
>> amd my Hipo units were both brand new when I got them.
>>
>> David Rieben
>>
>>
>> ----- Original Message ----- From: "Neon Tesla" <neontesla at gmail.com>
>>
>> To: "Tesla Coil Mailing List" <tesla at pupman.com>
>> Sent: Sunday, May 13, 2012 8:56 PM
>> Subject: Re: [Bulk] Re: [TCML] ANOTHER ONE DOWN, ANOTHER 37667 BITES THE
>> DUST
>>
>>
>>  Where did you get those Hipotronics caps?
>>> As a product of this conversation I too just learned
>>> my 37667 was useless for my soon to be finished
>>> 8 inch system :' (
>>>
>>> On Sun, May 13, 2012 at 7:33 AM, drieben <drieben at att.net> wrote:
>>>
>>>  Hi Adam,
>>>>
>>>> Yes, the 35 kV rating of these 37667 units seems to
>>>> really be "running on the razor's edge" for failure when
>>>> pushing voltages  > 12 kVAC and seriesing them in
>>>> 2's for a 70 kV rating does seem to properly address
>>>> this issue. From what I've been able to gather, I would
>>>> opt for a capacitor voltage rating at a minimum of 3x
>>>> the maximum AC RMS voltage that is anticipated from
>>>> the transformer. Both Cameron Prince and I have expe-
>>>> rienced failure with a .1 ufd, 50 kV rated Hiptronics
>>>> pulse cap in our large Tesla coils, driven by a 14.4 kV pig,
>>>> that was overdriven to 16.8 kV through variacs. That
>>>> would place the Hipotronics unit right at the 3x rule with
>>>> a 16.8 kV(AC) input. After switching to a 75 kV rated
>>>> Maxwell unit, we've experienced no more problems.
>>>> The > 3x voltage rating provides a safety cushion for the
>>>> very high voltage reversals experienced in a Tesla coil
>>>> circuit.
>>>>
>>>> David Rieben
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> ----- Original Message ----- From: "Yurtle Turtle" <yurtle_t at yahoo.com>
>>>>
>>>> To: "Tesla Coil Mailing List" <tesla at pupman.com>
>>>> Sent: Sunday, May 13, 2012 4:35 AM
>>>> Subject: [Bulk] Re: [TCML] ANOTHER ONE DOWN, ANOTHER 37667 BITES THE 
>>>> DUST
>>>>
>>>>
>>>>
>>>> I have used 10 in series/parallel for over a decade in 25 kVA use on a
>>>> 10"
>>>> coil and they are still fine. I bought them in at least four different
>>>> "buys", so who knows the abuse they suffered before me, but they have
>>>> performed admirably, as long as you use two in series.
>>>>
>>>> Adam
>>>>
>>>> ______________________________****__
>>>>
>>>> From: MICHAEL HARDY <mhardy4 at wi.rr.com>
>>>> To: Tesla Coil Mailing List <tesla at pupman.com>
>>>> Sent: Saturday, May 12, 2012 11:15 PM
>>>> Subject: [TCML] ANOTHER ONE DOWN, ANOTHER 37667 BITES THE DUST
>>>>
>>>> When I first decided to build a pig powered coil (2004 ), I searched 
>>>> for
>>>> pulse caps on the internet, and of course the infamous 37667's were
>>>> everywhere. Bought 5 at $100 each. Then found out they weren't very 
>>>> good
>>>> for TC's. I've since been running 3 TC rated Maxwell 0.2uF, 20 kV caps 
>>>> in
>>>> series, for 0.066uF @ 60kV. This on a 14.4 kV Pt powered 6" coil system
>>>> running around 4800 watts with no problem. I have recently completed a
>>>> 15"
>>>> coil running at about 15 kW. I used 2 banks (including the one above) 
>>>> in
>>>> parallel for 0.14 uF at 60 kV. I still am running the smaller coil
>>>> routinely. Changing out one bank is a pain, so decided to try a pair of
>>>> 37667's in parallel (0.06 uF @ 35kV). Ran good with only slight warmth 
>>>> to
>>>> cases of caps. Short 30 sec runs with 3 minute pauses. After a half 
>>>> hour
>>>> I
>>>> saw steam from the cap bank. Checked, and one of them had split open.
>>>> DON'T
>>>> BUY 37667 MAXWELL'S FOR TC USE!
>>>> ______________________________****_________________
>>>> Tesla mailing list
>>>> Tesla at pupman.com
>>>> http://www.pupman.com/mailman/****listinfo/tesla<http://www.pupman.com/mailman/**listinfo/tesla>
>>>> <http://www.**pupman.com/mailman/listinfo/**tesla<http://www.pupman.com/mailman/listinfo/tesla>
>>>> >
>>>> ______________________________****_________________
>>>> Tesla mailing list
>>>> Tesla at pupman.com
>>>> http://www.pupman.com/mailman/****listinfo/tesla<http://www.pupman.com/mailman/**listinfo/tesla>
>>>> <http://www.**pupman.com/mailman/listinfo/**tesla<http://www.pupman.com/mailman/listinfo/tesla>
>>>> >
>>>> ______________________________****_________________
>>>> Tesla mailing list
>>>> Tesla at pupman.com
>>>> http://www.pupman.com/mailman/****listinfo/tesla<http://www.pupman.com/mailman/**listinfo/tesla>
>>>> <http://www.**pupman.com/mailman/listinfo/**tesla<http://www.pupman.com/mailman/listinfo/tesla>
>>>> >
>>>>
>>>>
>>>
>>>
>>> --
>>> *Don't lower your expectations, raise the voltage !*
>>>
>>> ______________________________**_________________
>>> Tesla mailing list
>>> Tesla at pupman.com
>>> http://www.pupman.com/mailman/**listinfo/tesla<http://www.pupman.com/mailman/listinfo/tesla>
>>>
>>
>> ______________________________**_________________
>> Tesla mailing list
>> Tesla at pupman.com
>> http://www.pupman.com/mailman/**listinfo/tesla<http://www.pupman.com/mailman/listinfo/tesla>
>>
>
>
>
> -- 
> *Don't lower your expectations, raise the voltage !*
> _______________________________________________
> Tesla mailing list
> Tesla at pupman.com
> http://www.pupman.com/mailman/listinfo/tesla 