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G8MNY > TECH 03.01.03 18:07l 44 Lines 1874 Bytes #999 (0) @ WW
BID : 36280_GB7CIP
Read: GUEST OE7FMI
Subj: Soldering Iron Economizer/Boost
Path: DB0MRW<OK0PPL<RZ6HXA<SP7MGD<GB7YKS<GB7PZT<GB7MAX<GB7COV<GB7COV<GB7CIP
Sent: 030103/1324Z @:GB7CIP.#32.GBR.EU #:36280 [Caterham] $:36280_GB7CIP
From: G8MNY@GB7CIP.#32.GBR.EU
To : TECH@WW
By G8MNY
Suitable for 15-60W mains irons only!
............S T A N D.................... ....I R O N.........
---------------------------------------------------------
/ ! !
L --- ! ------------ ! + 3 core !
\ ! ! --- 10uF cable SOLDERING
! --- --- --- 350V Press IRON
! \ / / \ ! Boost ELEMENT
! --- --- ---10R------------------> o !
! ! ! ! !
! ! ----------------------------------------------
! ! Economize o !
-----! _____________o <__!
! ! Normal
! !
4x --- ---
1N4006 / \ \ /
--- ---
! !
N ------------------
When on the stand the mains fed to the iron is half wave only for economizer
mode (1/2 power), the iron rest on a suitably mounted stand micro switch that
is connected to one of the bridge diodes. When the iron is picked up, full wave
is restored for (normal power).
An added non locking press button switch mounted on the iron, this boosts the
power by connecting a 10uF with a 22R in series (47uF/10R for 60W) housed in
the stand (iron not earthed 3 core cable!), resulting in approx 300V peak DC
from the mains being used for high power. This is approx 2x the normal power,
hence the non locking press switch!
Make sure all mains connections & switches are safe (properly shrouded eg
heatshrink) to avoid shocks etc.
A neon (with series 220K) across iron can be used to indicate the power status.
73 De John, G8MNY @ GB7CIP
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