[rollei_list] Re: 1400 RES flash - what capacitor?
- From: "John Wild" <JWild@xxxxxxxxxxxxxxxxxxxxxx>
- To: <rollei_list@xxxxxxxxxxxxx>
- Date: Thu, 5 Apr 2007 17:14:22 +0100
John.
Although I am not an expert, tinkering has given me a bit of knowledge
and others will probably know more than me. ;-) Obviously watch out when
inside a flashgun, the voltages involved can 'bite'.
I have a Beta 4 flash in which the capacitor has gone. It does whine
when turned on because that is the sound of the oscillator, which causes
the voltage to fluctuate thereby allowing the voltage to be increased up
to about 300v DC through the transformer. The rating of the capacitor is
probably written on the side but physical size is usually directly
related to capacity and also whether it will fit inside the flash gun. A
smaller rated capacitor will just give a smaller flash output. It must
be a photo flash capacitor because they are designed to be instantly
discharged. A standard electrolitic capacitor will not take the strain.
I took a capacitor out of a 'throw away' camera and it worked fine
except for the lower light output. Photo flash capacitors are available;
finding exactly the right one is the problem. They were often made
specifically to fit inside what space was available in the housing.
If you say the flash does not whine, it may be another component
problem.
Best wishes
John Wild
-----Original Message-----
From: rollei_list-bounce@xxxxxxxxxxxxx
[mailto:rollei_list-bounce@xxxxxxxxxxxxx] On Behalf Of John Lehman
Sent: 05 April 2007 14:16
To: rollei_list@xxxxxxxxxxxxx
Subject: [rollei_list] 1400 RES flash - what capacitor?
Now that I am back in Germany, I have a Rollei question the first week
:-)
One of my colleagues here picked up a Rollei 140 RES flash at a
flea-market near Cologne this last weekend. The flash is in perfect
cosmetic condition, but non-functional. With the power supply plugged
in, the red ready light comes on almost at once, but there is no "whine"
from charging the capacitor, and no flash. I assume the electrolytic
capacitor is probably dead. Since all of my reference material is at
home in Alaska (and asking my barely-German-speaking wife to find and
look through Procknow and email me the result is not realistic), can
anyone tell me what capacitor was used in this flash (and ideally where
in either Germany or the US my colleague could get one).
John Lehman
College, Alaska USA(working in Cologne, Germany until late June)
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