anyone used lithium cells

[solderman]

Hi
For obvious reasons there is not enough room for a standard 9V battery in a 1590A encluser. I made a Ge PNP Fuzz Face with positive GND that for known reasons couldn't be powered together with the rest of my effects with the same wallvar. What to do? my solution was to use 3x3V 75 mAh each lithium cells like those used in computers, watches etc. The thing is that I expected 3X3V to deliver 9V. But together they deliver 13.2V unloaded and 12.8 loaded with the Ge fuzz circuitry. This is more than I can bias. How can this be any suggestions?? any one else tryed to power an effect with lithium cells ?

The cells is in the black package in the front




//Solderman

[MohiZ]

Hmm... how about a series resistor between the batteries and the circuit, so that the voltage the circuit receives is about 9 volts? I'm not sure but I think it could work.

[BrianJ]

How about using 2 batteries instead of 3?  8.5Vdc?

[anchovie]

What's the code stamped on your battery?

[Nasse]

Put a diode or few in series, works for polarity protection too. Silicon diode drops something like 0,6 ... 0,7 volts and then you can use Ge  or shottky diode if you want less drop

[petemoore]

Put a diode or few in series, works for polarity protection too.
  Just for the experience of trying out different voltages, other than the space and trouble...a switcher to jump however many diodes, then you could V-starve or not the FF, with better batteries the ability to try changing V'supplied, and ability to function with older batteries.
  I don't know how much heat-current the diodes exude, but the lower voltage FF would of course be less current, running it at LV may or may not have tonal advantages, alter bias.

[newfish]

This is an excellent idea.

I was after something similar for a simple FET boost for my Bass (added a Piezo under the fingerboard) that would fit in the existing cavity.

I decided to use a single 'N' Cell (used in Cameras and remote alarms etc) - 12v at a fraction of the size of a PP3.

Not sure how long it will last, although current draw for my tiny-boost is minimal.

http://www.rapidonline.com/Electrical-Power/Batteries/Alkaline/Miniature-alkaline-batteries/74640

Might also be much easier to change as and when they go, since there's an AA-style holder for them.

[Ripthorn]

I would just get a 9V zener and presto chango, 9V and you only stuck in one component.

[DDD]

It seems (moreover - for sure) that 12.8 V supply gives much more abilities to get good sound relatively to 9 Volts.

[solderman]

What's the code stamped on your battery?

Hi
They are Philips
Lithium Batteri CR 2016

Type  CR 2016
Volt: 3,0
mAh: 70
Size Ø 20,0x1,6 mm

This is actually no big problem but I was mostly curios how 3+3+3=13 and not 9 as I had expected.
The bleeder 9.1V Zener was a good easy fix but it wold Surely drain the battery rather quickly or wouldn't it??


//Solderman

[solderman]

This is an excellent idea.

I was after something similar for a simple FET boost for my Bass (added a Piezo under the fingerboard) that would fit in the existing cavity.

I decided to use a single 'N' Cell (used in Cameras and remote alarms etc) - 12v at a fraction of the size of a PP3.

Not sure how long it will last, although current draw for my tiny-boost is minimal.

http://www.rapidonline.com/Electrical-Power/Batteries/Alkaline/Miniature-alkaline-batteries/74640

Might also be much easier to change as and when they go, since there's an AA-style holder for them.

I'l trie this next time I have to fit a battery in a 1590A Box



Size: 25A
Typ: Alkalisk
Volt: 9,0
Dimension: Ø7,7x21,4 mm

//Solderman

[kamiwaza]

This is an excellent idea.

I was after something similar for a simple FET boost for my Bass (added a Piezo under the fingerboard) that would fit in the existing cavity.

I decided to use a single 'N' Cell (used in Cameras and remote alarms etc) - 12v at a fraction of the size of a PP3.

Not sure how long it will last, although current draw for my tiny-boost is minimal.

http://www.rapidonline.com/Electrical-Power/Batteries/Alkaline/Miniature-alkaline-batteries/74640

Might also be much easier to change as and when they go, since there's an AA-style holder for them.

I used these to power a Cmoy headphone amp. It was so good I ended up using a pair to get 24v. Don't know how much life is in them as I don't use my headphone amp much. Still, couldn't be much worse than mutiple watch cells.