Re: Zero Crossing Strobe & possible kits?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "colin.heath4 by way of Terry Fritz <twftesla-at-qwest-dot-net>" <colin.heath4-at-ntlworld-dot-com>

hi colin
            are you going to ambereley on saturday the 25th as im going to
be there with my 6" coil and my srsg and would love to try this to setup my
gap also if you are looking for somebody to split the cost with knocking up
a few of these units let me know
cheers
colin heath
----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, May 08, 2002 2:58 PM
Subject: Zero Crossing Strobe & possible kits?


> Original poster: "Colin Dancer by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<CMD-at-dataconnection-dot-com>
>
> Hi Daniel et al,
>
> The replacement part is an Atmel T2117, which just came onto the market
late
> 1Q this year.  It will need a couple of resistors and a diode, but
performs
> the same function as the CA3059, and should reach general availability
later
> this year. For details see
> http://www.atmel-wm-dot-com/upload/doc3a07f81ad7ab3.pdf, in particular the
"Fig
> 10. power switch" circuit which is very similar to the circuit needed for
> our application, except that we need to drop the photo-diode and tweak the
> resistors so it is always on.
>
> The chips aren't yet available from any major suppliers, but I've ordered
in
> bulk from the manufacturer and our US office have just received a shipment
> of 20 parts.  If you want one let me know, and I'll send it out once I've
> proved the component works in our application.  The chips have cost me
about
> $1.20 each including shipping here, so I'm willing to send out a small
> number for free to help fellow SRSG users.
>
> Personally I don't have any spare CA3059's, but I believe Nick Fields (who
> posted my circuit to the list) might have one or two.  As he says in a
> previous email they are still available from obsolete component suppliers
> but at $10+ each with the price going up.
>
> Finally, if people are interested in a kit I could probably stretch to
> making a few circuit boards and collecting together the required
components
> for US and UK usage.  I'd have to look into the details, but I'd guess
price
> would be about ?10-?15 a piece including circuit board and all the
> components (excluding case and lead).  In terms of postage, however, it
> would probably make more sense for someone in the US to collect the bits
for
> the US kits.
>
> Lets get a feel for interest first.
>
> Cheers,
>
> Colin.
>
> P.S. Not trying to boast, but if you haven't seen one of these units in
> operation they are amazing :-)  My 6" x 3000 rpm SRSG seems to be dead
still
> under this unit with zero jitter.  I've even taped a scale round the
> periphery and can directly read off the firing angle.
>
> -----Original Message-----
> From: Daniel Hess [mailto:dhess1-at-us.ibm-dot-com]
> Sent: 07 May 2002 22:09
> To: Colin Dancer
> Subject: RE: Zero Crossing Strobe
>
>
> Collin
>
> What is the replacement part number? As I recall you had some of the
> original CA3059's for sale. What is your asking price and what are your
> terms?
>
> Thank you,
>
> Daniel Hess
> ---------------------- Forwarded by Daniel Hess/Dallas/IBM on 05/07/2002
> 04:04 PM ---------------------------
>
> "Tesla list" <tesla-at-pupman-dot-com> on 05/07/2002 09:22:12 AM
>
> To:    tesla-at-pupman-dot-com
> cc:
> Subject:    RE: Zero Crossing Strobe
>
>
>
> Original poster: "Colin Dancer by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <CMD-at-dataconnection-dot-com>
>
> The only slight pain is that the chip (CA3059) went out of production last
> year and is quite hard to get.  I have, however, found another more recent
> chip which should perform the same function and will in due course release
> an updated version of the circuit.
>
> Colin.
>
>
>
>
>
>
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