amigo wrote:
Mutten,
nice work, you could say you succeeded against all odds (seeing that doc is not posting on OU anymore)
You really need to make a variable inductor for the oscillator (body with a ferrite slug) so that the LC tank can be tuned precisely and with lower current consumption.
Using store bought inductors is easy at first but can be painful most of the times because component values are limiting the tuning options.
Also, LCR meter is definitely a good item to have , I find myself using it more and more lately, almost as much as a DMM.
Otherwise it's really fun seeing a neon bulb light up brightly from a single transistor oscillator that has no usual step-up transformers in it and relies on resonance.
Try emailing doc Stiffler, perhaps he still has some SEC 15-3 boards around his lab? Having a board is much easier because he designed it in such a way to provide necessary capacitance in the circuit.
161007-14-Slug-Tuned coil forms-Electronic Surplus Inc.Offering obsolete IC's, discretes, motors, relays, switches, pots, and much, much more! Always looking for your excess inventory.
@amigo
Question, what size wire and how many turns are on the coil form for the SEC15?
Been searching through the OU forum but I can't seem to locate the info.
@Vortex sorry missed your question, as far as I know the Doc is using a modified SEC15-3 ( that circuit I linked to) to power the cool white lights and small incandescent. What the modifications are I'm not sure, but in the videos it looks like there is a larger air core coil attached to it. Won't be able to do much till my coil forms get here.
