Just an extra note. Several of my "ancient" flashes recommend similar
techniques for forming the capacitor.
The AC electric ones as well as the strictly DC battery ones suggest
forming the capacitors for a length of time. One hour is common for the AC
types, but several minutes is all I remember for the DC types. Then after
obtaining this "time" requirement, they seem to all recommend discharging
the flash several times at highest output.
One of the battery units recommends waiting for 10 seconds after the full
charge indication re-lights, and then discharging the flash unit and
repeating this cycle 4 or 5 times. It also recommends forming with only
new (non-rechargeable) batteries. I've tried it a couple of times with not
fresh batteries or rechargeables out of necessity, but had less than great
results.
One of the AC electric units recommends waiting for 5 minutes after full
charge indication and repeating this cycle 10 times. I tend to follow
these recommendations with all of my flash units.
Both types of flashes recommend this procedure after 90 days of non-use.
K.
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