Mobius
Member
I have read and seen the battery insert for the Ceyoo. However, the insert I have takes 4 batteries in stead of the single 22 volt one. The manual says "four standard pencil-type batteries". What are the pencil batteries? I assume they are AA since they fit. Also, does anyone know how are the terminals of the batteries to be mounted? Again I assume the positive side of all the batteries are at the upper end toward the flash head; since there is only one terminal strip connected to center brass rod. Also, one last question; it appears on of the contact strips is broken. Am I correct? It's an easy fix, but wanted to confirm.
Rob-F
Likes Leicas
I see some problems here. For one thing, if it is supposed to have a 22 volt battery, then four AA won't work because they only add up to 6 volts. And if you put the negative side of all the batteries down, some of them will oppose the others, so you won't even have 6 volts. I'm wondering what a pencil battery is: possibly four cells each, for a 6 volt battery; and then four of those would give 24 volts, which is close to the original 22 1/2? (There is such a thing as a 22 1/2 volt battery. It's 15 cells in series.)
Rob-F
Likes Leicas
Here's a discussion that may be useful:
https://www.photrio.com/forum/threa...o-flash-5b-bulbs-anyone-use-them.142716/print
And another:
https://www.rangefinderforum.com/forums/showthread.php?t=69207
https://www.photrio.com/forum/threa...o-flash-5b-bulbs-anyone-use-them.142716/print
And another:
https://www.rangefinderforum.com/forums/showthread.php?t=69207
Robert Lai
Well-known
You have the insert for 4 x AA batteries. You need to put them so that they alternate in polarity. They are wired in series to give a 6V charge. The 22.5V version is like this one:
https://www.ebay.com/itm/Ernst-Leit...580134?hash=item23a35c2426:g:cWAAAOSw9GhYgViG
I prefer the 22.5V version. It is a battery capacitor unit, so the bulb firing tends to be more reliable. The capacitor is usually dead, so you have to take it apart to replace the capacitor. 150uF to 250uF 25V electrolytic capacitor will do. I also put an A23 battery (12V) holder into the location of the 22.5V battery holder. There are a couple of reasons why.
First is cost. A23 batteries cost about $2 each at Walmart. The 22.5V batteries cost over $10 each. Furthermore, the currently available replacements for the 504 are too big, so that you can't put the cartridge into the flash body with the cell in it.
Second, the A23 being alkaline have a better discharge curve than the dry cells, which tend to die all of a sudden.
The upper terminal on the holder is positive. You will notice that the positive terminal seems to just stick up into the air, connected to nothing. This is the Leitz secret sauce!
When you put the battery cartridge into the flash, the battery lead touches the undersurface of the flash head itself. The circuit to the rest of the capacitor is complete only when you put a bulb into the circuit. It will charge through the bulb itself. This feature helps prevent you from burning your fingers inserting a bulb if the PC cord is somehow shorted.
https://www.ebay.com/itm/Ernst-Leit...580134?hash=item23a35c2426:g:cWAAAOSw9GhYgViG
I prefer the 22.5V version. It is a battery capacitor unit, so the bulb firing tends to be more reliable. The capacitor is usually dead, so you have to take it apart to replace the capacitor. 150uF to 250uF 25V electrolytic capacitor will do. I also put an A23 battery (12V) holder into the location of the 22.5V battery holder. There are a couple of reasons why.
First is cost. A23 batteries cost about $2 each at Walmart. The 22.5V batteries cost over $10 each. Furthermore, the currently available replacements for the 504 are too big, so that you can't put the cartridge into the flash body with the cell in it.
Second, the A23 being alkaline have a better discharge curve than the dry cells, which tend to die all of a sudden.
The upper terminal on the holder is positive. You will notice that the positive terminal seems to just stick up into the air, connected to nothing. This is the Leitz secret sauce!
When you put the battery cartridge into the flash, the battery lead touches the undersurface of the flash head itself. The circuit to the rest of the capacitor is complete only when you put a bulb into the circuit. It will charge through the bulb itself. This feature helps prevent you from burning your fingers inserting a bulb if the PC cord is somehow shorted.
Mobius
Member
Thank you, Robert. I wasn't planning on using the flash since I have a Vivitar 285 and a few other small electronic flashes. With the x-sync being what it is, I doubt I will use any flash. As a follow-up, for the A23 holder, where do you place the positive and negative leads. A picture works well for this old engineer.
Robert Lai
Well-known
Solder the positive lead of the A23 to the upper battery lead (positive). The negative lead goes to the bottom battery terminal, which is negative.