Re: Flyback HV terminals. Richard Hull speaks! (fwd)

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Original poster: Steven Roys <sroys@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Tue, 6 Mar 2007 02:03:23 +0900
From: Peter Terren <pterren@xxxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: Flyback HV terminals. Richard Hull speaks! 

Richard Hull,
(Tesla coil Master, for you young blokes)
Welcome back to HV.
I well recall your Nemesis coil and also, I think that is your coil in the 
current Guinness book of records as a photographic example of an impressive 
coil
Last I heard (years ago), you were happily fusoring away. Could we have a 
little insight into your travels in those years?

Tesladownunder

[Peter, and anyone else so inclined - feel free to check out www.fusor.net
to learn about the more recent adventures of Richard and the other members
of the Neutron Club.  SRR]

> ---------- Forwarded message ----------
> Date: Sun, 4 Mar 2007 13:15:13 -0500
> From: Richard Hull <rhull@xxxxxxxxxxxxxx>
> To: High Voltage list <hvlist@xxxxxxxxxx>
> Subject: Re: Flyback HV terminals (fwd)
>
> Modern flybacks have diodes in them and postive DC is the output on the 
> long
> top wire, so no rectifier is needed.
>
> The primary connections and the return for the High voltage, (ground), are
> on those circular row of bottom pins and it is a crapshoot as to what is
> what.  The base of the secondary (HV return) is best found by getting a 
> sine
> wave oscillator connecting it to the hv lead through an LED.  Tune the
> oscillator to about 10khz, then with the other lead of the oscillator 
> probe
> the bottom pins with it until the LED lights.  This is the HV return or
> bottom of the secondary and it is usually ground.
>
> The primary is a bit more difficult to find, but can be isolated through
> trial and error as the remaining 4-6 pins on the base are usually 
> connected
> as pairs of coils.  The highest ohmic resistance of the three or four base
> coils is most likely the primary.  All the other coils are low voltage 
> coils
> for the picture tube filament and other low voltage supplies in the TV and
> can be ignored.
>
> Richard Hull