Hi Lorin
uploaded a chapter from Puckle's Time Bases, which discusses van der Pol's cct and introduces a number of ccts developed from it.
Hope it helps!
http://launch.groups.yahoo.com/group/tubesynthdiy/files/Puckle/ --- In tubesynthdiy@yahoogroups.com, "Lorin Edwin Parker" <parker@...> wrote:
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> Looking at some divide by two circuits:
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> I haven't had much luck prototyping the Pentode van der Pol type circuit nor the single tube pentode trigger circuits - yet. I think the key may be to use a negative supply to bias the suppressor (which I haven't done yet, and isn't always theoretically necessary).
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> Anyhow I'll scan in some examples. Anybody gotten a good trigger or relaxation oscillator with the van der Pol model? It looks like this was the method of creating sub-octaves on the Hammond Novachord.
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> Regards,
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> Lorin E. Parker
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