[ARC5] [BoatAnchors] Stinson’s DC to DC converters

[Brian]

Hello Dave,

You can reduce the number of toroids in two ways:
  a.. running two turns through one toroid is pretty well equivalent to running one turn through two toroids 
  b.. running the positive and negative leads through the same toroid - you may want to experiment with the leads in parallel, Gerry Sevik transmission line style, or in anti-phase as in mains EMI suppressor chokes.

73 de Brian, VK2GCE.

On Wednesday, March 14, 2018 2:22 PM, Dave said:

-----Original Message-----
From: Tom Bridgers
Subject: [ARC5] Stinson’s DC to DC converters

This is exciting stuff.  Hats off to David Stinson who puts new meaning into keeping those filaments lit.
73’s
Tom. KE4RHH 
------------------------------

Tom, you and so many are ever kinder to me than I deserve.  This "design" if one can all it that, is still in the "tweaking" stage.  I just now discovered that, if I remove the antenna, I can hear some noise around 40 and above.  With the antenna on, I haven't found any around 30, 40 or 80 meters, it seems to be under the receiver's noise floor.

I tried making this one with fewer ferrites than the last one, thinking I may have "overdone" that one.  Here's the photos:
https://photos.app.goo.gl/uAXN9Jfw9oCXuQC03
https://photos.app.goo.gl/4LmZIDuMJVbIszXt2

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