Group: Moderator
Post: 2,040 (563 liked)
Join date: April 2014
Status: Long, long time Contax and Yashica user; glad to be here and hope to contribute.
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on Oct 20, 2020 11:41:46 GMT
Posted: Oct 20, 2020 11:41:46 GMT
It is quite rare these days to find a 1960's bulb flash unit in its original packaging so it had to be grabbed. YASHICA-LITE BC-1What makes this doubly pleasing is that it still works. 15v batteries are still readily available and, please note modern flash manufacturers, the 50+ year-old capacitor which has not been used for several decades is fully functional and delivers the charge needed to fire the bulb. I tried it out on a Yashica 35 YK and was taken back to the early-1960s with that familiar pop of the flash-bulb firing. Magic. An aside:So how come so many manufacturers of modern flash units have to recommend that you fire the flash at least every couple of months to prevent the failure of the capacitor? All my Contax flash units - even the monsters such as the RTF540s - still fire up and with them there is that tremendous 'crack' when they fire. When I had them in a 3-way multi-flash set-up, I had to remember to warn the models in advance of the noise. A couple of times I forgot and when set on Auto with a motor drive, I got some amazing facial expressions after the first exposure - perfect for Halloween but not ideal for most models' portfolios.
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Group: Administrator
Post: 1,370 (301 liked)
Join date: February 2017
Status: Failed treatment for L.B.A. and G.A.S,
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on Oct 31, 2020 18:20:25 GMT
Posted: Oct 31, 2020 18:20:25 GMT
An aside:So how come so many manufacturers of modern flash units have to recommend that you fire the flash at least every couple of months to prevent the failure of the capacitor? I don't recall seeing comments about capacitor failure rates changing when flashes aren't fired regularly - only that the 'ready' times can get way longer when there's no power trickling through to keep them in a semi-charged state. Capacitors won't get pre-charged at the maker's factory, so it takes a few firings to get new ones primed. If left without power for a very long time (several months/years, not days/weeks), any residual power will bleed off to zero again and they need a few more power cycles to get prepped for steady use again. Most capacitor failures I've seen are from circuit issues in other components. Resisters or regulators that feed/cap their input voltage can fail, and it overcharges the capacitor until it pops. Otherwise it's age breakdown of the storage materials used, and it won't take and keep a charge any longer. Like many other electronic components, a part's 'grade' can make a huge difference too. Something like MIL-SPEC components are better - but more expensive - and I imagine that Contax gear always had one of the higher specification materials in them.
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