Retro Boombox ,amp6

[V-bro]

HUH? What's that?? If this is what you intend as volume control it will not work... If it is intended as on/off, paired with the carbon track, why not just insert a reed contact or optical encoder? (drill hole, place LDR on one end, diode on the other, transistor on LDR, relay on transistor...) So many nicer ways of making this work...

Many sliders could be made suitable to control stereo volume, like using two opto couplers through which the voltage on the diode is controlled by the slider, then the left/right audio signal through the transistors, or photo resistors..... Some projects like this on the internet....

[dukens]

If this is what you intend as volume control it will not work... If it is intended as on/off, paired with the carbon track, why not just insert a reed contact or optical encoder? (drill hole, place LDR on one end, diode on the other, transistor on LDR, relay on transistor...) So many nicer ways of making this work...

It's intended as on/off with volume.
I've never even heard of reed contact or optical encoder. But from what I googled just a minute ago, those seem to do the job much better than my dukens-slider
Thank you again V-bro. Could you help me a little further by suggesting a particular reed switch that would do the job in my case?

Many sliders could be made suitable to control stereo volume, like using two opto couplers through which the voltage on the diode is controlled by the slider, then the left/right audio signal through the transistors, or photo resistors..... Some projects like this on the internet....

Now this goes way beyond what I understand, any chance you could post a link?

[axebay]

Nice build! Some similaritys to mine
I'm also planing to use a pico-ups for my LiFePO4 battery but were now told that they wont work together, the battery apparently needs a special charger? Do you experience any problems with charger and battery?

[Saturnus]

Nice build! Some similaritys to mine
I'm also planing to use a pico-ups for my LiFePO4 battery but were now told that they wont work together, the battery apparently needs a special charger? Do you experience any problems with charger and battery?

LiFePO4 batteries do not need a special charger. They are drop in replacements for SLAs.

All lithium batteries regardless of type should have battery management though as draining them too hard or overcharging them will cost you recharge cycles. It's just that LiFePO4 (or LiFeYPO4) types aren't potentially lethal even when misused as li-ion and li-po batteries are.

The main difference between LiFePO4 and LiFeYPO4 is that the Yttrium type just amplifies the LiFePO4 batteries advantages. 2.5 times as many cycles (up to 5000 with 20% capacity loss), twice the safe charge and discharge rates at 1C and 10C respectively, and 33% lower self-discharge rate at 3% per month.

[Scratchy]

See this FAQ from one manufacturer:
http://gwl-power.tumblr.com/

Over charge protection - The maximal voltage for the PCM battery is given as 14.6V. To protect the battery against overcharge, you should install a over charge protection that will disconnect the charging source from the battery when the maximal voltage is over-reached.

Deep discharge protection - As indicated in the specification file, the deep discharge voltage for the 12V PCM battery is set to 10V. You need to install battery-monitoring equipment to disconnect the load from the battery if the voltage drops to the 10V level. You should not rely on the PCM board only. The PCM board is only a last instance serving as a additional (backup) protection in case of the failure of the main protection against deep discharge. (See also here)

[Saturnus]

Deep discharge limit sort of comes naturally as the amp6 won't work under about 9V, and you'll get horrible performance as soon as capacity is so low that 10V is achieved. You'll hear it instantly on the bass if you try to turn up volume.