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<div class="moz-cite-prefix">On 1/6/22 4:59 PM, Terry Bowman via
Synth-diy wrote:<br>
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cite="mid:5A0C1731-7A95-45A1-94C5-06DD08D031E6@gmail.com">
<pre class="moz-quote-pre" wrap="">This is a very interesting thread. I'm reminded of a similar discussion we had years ago about how component specs had silently improved over the decades. In particular, someone tested a variety of LM3046s. As time went by Q1 and Q2 consistently became better matched. IIRC, chips of recent manufacture were better than the MIL specs on the datasheet.
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<pre class="moz-quote-pre" wrap="">On Dec 30, 2021, at 6:08 PM, Oren Leavitt via Synth-diy <a class="moz-txt-link-rfc2396E" href="mailto:synth-diy@synth-diy.org"><synth-diy@synth-diy.org></a> wrote:
MPSA42 (NPN) and MPSA92 (PNP) - high voltage 300V.
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What, no MJE340 (300V NPN)? The MPSA42 is fine for an ИН-13 bar-graph tube but can't handle the higher current of an ИН-9...</pre>
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<p>Actually I do have MJE340 and MJE350 (its 300V PNP compliment) .<br>
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cite="mid:5A0C1731-7A95-45A1-94C5-06DD08D031E6@gmail.com">
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Oh wait, this is SDIY not the Nixie tube group. Sorry. 8D
In all seriousness, what do you need 300V transistors for (especially PNP)? Driving a VFD or plasma display?</pre>
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I've used the 300V devices in pro audio power amplifiers that can
easily have 200+ volts between the rails. Yes, Nixie tubes, too.
Hmmnnnn, perhaps maybe a <span class="module__title__link">Dekatron</span>
step sequencer sometime ;)
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cite="mid:5A0C1731-7A95-45A1-94C5-06DD08D031E6@gmail.com">
<pre class="moz-quote-pre" wrap=""> Or perhaps something like this:
<a class="moz-txt-link-freetext" href="http://m.bareille.free.fr/vu-in13/vumeter_in13.htm">http://m.bareille.free.fr/vu-in13/vumeter_in13.htm</a>
Terry Bowman, KA4HJH
"The Mac Doctor”
(The notorious thread hijacker)
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