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Re: Ignition circuit problem

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On 3/26/2017 20:39, Larry Sheldon wrote:
> On 3/25/2017 23:35, Sylvia Else wrote:
>> On 26/03/2017 3:34 PM, Sylvia Else wrote:
>>> I'm using this circuit to provide 250V pulses to an ignition coil.
>>>
>>
>> Oops - sorry - wrong group.
> ACKKKK!  That is cruel!
>
> What is the right group?  Interesting question.

Many years ago[1] I built a breadboard[2] preamp[3] for some exotic 
phonograph cartridge (NOSEITR[4]) by wiring everything 
point-to-point[5], creating a ball of stuff around a tube socket for the 
6C4 tube.  After some tinkering, it worked like a charm!

So I carefully took it apart, piece by piece, and reassembled it in a 
proper aluminum box-chassis.

And that SOB[6] motor-boated!  And I never was able to figure out why.

(I eventually, I think, saved enough money to buy a DYNAKIT Preamp.)

1.  How long ago?  This is part of my high-school-age "High Fidelity 
Sound System" for my bedroom.  "HiFi" was an obscene term, there was no 
"Stereo" yet, although the trade shows had displays of "binaural" 
records and the magazines agonized over ever getting wire recorders to 
do Binaural.

2.  From a technique of using a wooden board for a chassis for 
experimental designs.  I didn't have a suitable piece of wood, and if I 
could have afforded to replace my mother's prize breadboard I could have 
afforded an aluminum box.

3.  Preamplifier--typically had one or more of these functions:  On the 
input side, operate at the impedance the input device required, provide 
tone adjustments, provide a connector type not in the local standard, 
and so forth.  On the output side, proved a signal at the 
system-standard level and impedance via a system-standard connector. 
The term frequently applied to a chassis containing several preamps 
connected to a common output.

4.  No Other Specification Extant In The Record(s)

5.  No part-leads cut or bent (much).

6.  Do I have to explain EVERY thing?
-- 
quis custodiet ipsos custodes?
-- Juvenal

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Thread

Ignition circuit problem Sylvia Else <sylvia@not.at.this.address> - 2017-03-26 15:34 +1100
  Re: Ignition circuit problem Sylvia Else <sylvia@not.at.this.address> - 2017-03-26 15:35 +1100
    Re: Ignition circuit problem Larry Sheldon <lfsheldon@gmail.com> - 2017-03-26 20:39 -0500
      Re: Ignition circuit problem Larry Sheldon <lfsheldon@gmail.com> - 2017-03-26 21:27 -0500
      Re: Ignition circuit problem Sylvia Else <sylvia@not.at.this.address> - 2017-03-27 14:01 +1100
        Re: Ignition circuit problem Larry Sheldon <lfsheldon@gmail.com> - 2017-03-27 00:32 -0500
  Re: Ignition circuit problem Rich <rich@example.invalid> - 2017-03-26 05:02 +0000

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