Message 27609 in TECH.WW
From: G8MNY
Date: Sun, 09 Aug 26 07:38:00 Z
Newsgroups: TECH.WW
Subject: Splitting a floating PSU
Message-ID: <1535_GB7CIP>
Path: N2MH4|N2MH|VE2PKT|VK4OT|VK7AX|GB7CIP
R:260809/0742Z 35124@N2MH4.#SENC.NC.USA.NOAM LinBPQ6.0.24
R:260809/0742z @:N2MH.#NNJ.NJ.USA.NOAM [via AREDN Mesh] jnos 2.0p $:1535_GB7CIP
R:260809/0742Z 14949@VE2PKT.#TRV.QC.CAN.NOAM LinBPQ6.0.25
R:260809/0741Z 2287@VK4OT.#NQ.QLD.AUS.AUNZ LinBPQ6.0.25
R:260809/0741Z 15462@VK7AX.#ULV.TAS.AUS.AUNZ LinBPQ6.0.24
R:260809/0738Z @:GB7CIP.#32.GBR.EURO #:1535 [Caterham Surrey GBR] $:1535_GB7CIP
From: G8MNY@GB7CIP.#32.GBR.EURO
To : TECH@WW
By G8MNY (New Aug 06)
(8 Bit ASCII graphics use code page 437 or 850, Terminal Font)
Here is a simple way to spit a single floating power supply into +/- rails. It
The asymmetrical currents & voltages will affect the components needed (e.g.
transistors have to handle peak offset current & heat), in some applications,
e.g. value of 1K R may be 39K on 100V. Higher currents may need darlingtons or
P & N ch MOSFETs.
The above circuit should provide adequate balance for testing most things that
need a balanced supply.
D1 provides some cross over bias keeping the transistors in class B, 2 diodes
in series may do better, but easy to get into class AB/A & get hot when this is
not needed!
Y Don't U send an interesting bul?
73 de John G8MNY @ GB7CIP
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