TR Power Pack is not only box for batteries! It has it's own condensator and other 
electronic so some flash functions are transfered to it. It is impossible to do it by 
your own!
It is problem when using it because it tends to pull off flash from camera. Usually 
flash is moved from hot shoe for some milimmeters. If You don't notice that, contacts 
for TTL metering are cut off, flash fires, but you don't notice that photos won't be 
good lit.
Andreas Wirtz
  Sid Barras <[EMAIL PROTECTED]> wrote:  I 
saw the pack at Adorama (usually the least expensive site) and found one 
for $120.... Seems a bit steep for a box that holds 6 C batteries....

I'm tempted to try and rig my own power supply... Maybe with off the 
shelf parts at radio shack? Anyone ever tried it before? I wonder if 
the plug to fit it to the flash is also off the shelf?
Yahoo! Health - your guide to health and wellness
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