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Jean-Paul_2 11th June 2009 07:27 PM

Start a SOZ
2 Attachment(s)
Here the schematics...

Actual projects:
- SOZ,
- tube line and headphone preamplifier (LifePO4 batterie powered): waiting for the Sennheiser HD800,
- cheap EL34 SE for SABA greencones LS,
- and starting the big 845 SE amplifier.

Jean-Paul_2 11th June 2009 08:29 PM

next step
I am building HT and heather supplies with LifePO4 batteries.

I am thinking about to use this batteries to supply also the SOZ.

woody 12th June 2009 03:43 AM

I tried a ~5W SOZ with batterys. I can't recomend doing this
the constant recharging realy shortens the batterys life unless
you go to some realy big batterys. In my case 4 7AH gell cells
gave me less than an hour of music and they died after about
30 charge discharge cycles because they were not deep cycle rated.

Jean-Paul_2 12th June 2009 09:18 PM

Hello Woody,

google for LifePO4: this batteries are used in hybrid cars!

The balancing electronic is drawned. We are starting today the braining for the big power charger.

Jean-Paul_2 12th June 2009 09:32 PM

here some interesting links for batteries: --> LifePO4 and balancing charger --> for more information about bikes or cars batteries

DaveM 13th June 2009 05:08 AM

Regardless of their intended use, it is always best to drain a battery no more than half way. I have heard that the battery cycle used in a Prius is very very gentle on the batteries. Remember the 100,000 mile warranty on the batteries. They need to last. Even the best of deep cycle batteries will have shortened life if drained 100%.

Jean-Paul_2 13th June 2009 09:04 PM

2 Attachment(s)
... the updated schematic.

Jean-Paul_2 13th June 2009 09:06 PM

2 Attachment(s)
... the PCB. Mono.

Input: BNC or directly wired to Cinch.

Output: WAGO or 6,3mm Faston (to Neutrik Speakon?).

Power: 6,3mm faston (to Neutrik Power-XLR); donīt forget, batterie powered!

Jean-Paul_2 13th June 2009 09:08 PM

2 Attachment(s)
... the partlist, stereo.

I like:
- Mundorf capacitors,
- PRP resistors.

The batterie design with charger coming soon (starting wenesday).

Jean-Paul_2 13th June 2009 09:10 PM

One printed circuit board in 8 working days = 42,40€.

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