Correction: 16kV, 750ma, for $8.82 each. HVP16 series.
https://www.mouser.com/ProductDetail/Rectron/HVP16?qs=lCPxyJiDM7z8v4UG4CMgbg%3D%3D
I’m guessing they didn’t have these in the 90s, but I’m also guessing they
didn’t have the 942CDEs either. The MOT diodes still feel like a better
solution for that ignition-coil TC. Hit some scrapyards, find used
microwaves. I can usually find discarded microwaves around town every
weekend. Haven’t had one of them be bad due to rectifier yet.
(Half the time: fuse. Other half the time: magnetron just won’t work.)
On Mon, Feb 13, 2023 at 10:22 PM Joshua Thomas <joshuafthomas@xxxxxxxxx>
wrote:
> I disagree; MMCs are versatile in that you can build them in boards or
> other cluster shapes, and then move the series-parallel tap points around
> for the desired voltage and capacitance rating. That's pretty useful if you
> make more than one coil, or your coil evolves over time. Also, if one of
> them blows, you lose a $9 capacitor (the CDEs are expensive now!) versus
> $40 or more for a doorknob.
>
> The only advantage I see to a huge string of small rectifier diodes is the
> dirt-low cost. You also have to find some way to mount or deal with them -
> in the article they're wrapped around PVC or something - and it ends up
> feeling like quite the kludge. I'm also suspicious of propagation delay
> along a long chain of rectifiers, and instantaneous charge limits being
> exceeded. There's a few stories from colliers (eg. Gao, and Greg at
> http://hotstreamer.deanostoybox.com/) who reported using strings of small
> rectifiers that should have by spec been sufficient and had them go bad.
>
> I'd rather just pay for some appropriately sized rectifiers and use them
> forever. I picked up some 15kV, 750mA chassis-mount recitifers from Digikey
> before they got discontinued. Looking forward to using those whenever I get
> around to doing a real dual-MOT power supply. Not too bad - $12 each, I
> think?
>
>
>
>
>
> On Mon, Feb 13, 2023 at 8:55 PM <pupman.com@xxxxxxxxxxxxxxxxxxx> wrote:
>
>> That's a cheap jab at an article from over 2 decades ago.
>>
>> MMCs are just as retarded as a string of cheap, available diodes when
>> you can just get better capacitors.
>>
>> On 2/13/2023 6:20 PM, Joshua Thomas wrote:
>> > Some of that article is genuinely hilarious.
>> >
>> > “The output of each ignition coil … is fed through identical diode
>> strings
>> > each composed of 45 series-connected 1 amp 1000-PIV diodes”
>> >
>> > Apparently this author never knew out the microwave transformer diodes!
>> >
>> >
>> >
>> > On Mon, Feb 13, 2023 at 6:57 PM Lux, Jim <jim@xxxxxxxxxxxxx> wrote:
>> >
>> >> On 2/13/23 3:17 PM, Ronald Reeland wrote:
>> >>> Here are a couple links to the Popular Electronics November 1999 issue
>> >>> featuring Charles Rakes Tesla Coil article and plans:
>> >>>
>> >>>
>> https://worldradiohistory.com/Archive-Poptronics/90s/99/PE.1999-11.pdf
>> >>>
>> >>> https://teslauniverse.com/build/plans/solid-state-tesla-coil-0
>> >>>
>> >>> Ron Reeland
>> >>>
>> >> The LU800 coil referenced in the PopElectronics article is still
>> >> available. Around $15 depending on the source.
>> >>
>> >> I have no idea what the electrical properties are, but I imagine it's a
>> >> fairly vanilla 12V coil.
>> >> _______________________________________________
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>
>
> --
> Joshua Thomas
>
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> Please update your information if you have not already done so.
>
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Joshua Thomas
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