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Re: [OM] homemade 6V Power Pack 1 or 2?

Subject: Re: [OM] homemade 6V Power Pack 1 or 2?
From: HI100@xxxxxxx
Date: Tue, 13 Feb 2001 00:09:03 EST
Johnsonpa@xxxxxxx writes:

<< I was browsing my local Radio Shack and noticed battery holders remarkably 
 similar looking to the photos I have seen of 6V Power Packs 1 and 2.  
Anybody 
 ever make one of these?  Any special hints or advice? 
 Please take that into consideration when describing the how-to part.
 >>

I have not built one but did check out the lights on my ringflash head along 
time ago.

My memory is that it just uses a "standard" coaxial power plug available from 
Radio Shack or other Electronics parts retailer. These come in a lot of 
different flavours. They are specified as Outer Diameter and inner pin 
diameter and long and short. 

A very common size is 5.5mm by 2.1mm and the long version is >>I think<< what 
is needed for the winder 6V connector.  Polarity should not matter for the 
light but if you want to use it for anything else you need to get the 
polarity right or you could do a lot of damage.

According to my notes the winder centre post is negative, with the outer ring 
being positive.   To solder the plug you need an electrical soldering iron 
(small tip) and some resin cored solder. (Not acid core ).  The nickel on the 
connector pin is often hard to solder reliably so use a small file or even 
nail file to partially remove/roughen the nickel and then carefully tin the 
pins with solder, before soldering the wires in place ( otherwise it won't 
stick). Place some tape to seperate the two wires before screwing the 
insulting cover back on. Beware the plastic insulation on the connector pins 
is usually easy to melt while soldering.

                  Regards,
                 Tim Hughes
                >>Hi100@xxxxxxx<<

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