12v battery power supply...

Gordy · « **on:** 18 Mar 2006, 07:58 pm »

Could be just the ticket??? May also qualify as a Sarah Lee!

http://www.excesssolutions.com/cgi-bin/item/ES3382

JDUBS · « **Reply #1 on:** 18 Mar 2006, 08:17 pm »

Gordy

Nice find!

What could this be paired up with considering the 12v output voltage?

-Jim

dnewcomer · « **Reply #2 on:** 18 Mar 2006, 10:45 pm »

sonic impact super-t ?

JDUBS · « **Reply #3 on:** 18 Mar 2006, 11:06 pm »

Quote from: dnewcomer

sonic impact super-t ?

Oh yeah! Totally forgot about those guys!

I'd love to find a 5v battery pack for my squeezebox.

Gordy · « **Reply #4 on:** 18 Mar 2006, 11:48 pm »

The T amps for sure... there's quite a few dac's that use 12v as well.

tianguis · « **Reply #5 on:** 19 Mar 2006, 01:38 am »

Gordy:
How ya doin?
Nice find, with a big BUT. The date code is 00/10. I assume this means it was made in Oct. 2000. If they've been sitting idle for that length of time, there's a good chance that the SLA battery is kaput. I've found that about a year is all these things can stand sitting around (without charging) before the battery has to be replaced.

Regards,
Larry Welsh

JoshK · « **Reply #6 on:** 19 Mar 2006, 03:03 am »

good point Larry, but even if, assuming it has a charging circuit built in, it might still be a good deal. You can always buy another SLA and use the rest, since $25 is still pretty good for a charging circuit.

Gordy · « **Reply #7 on:** 19 Mar 2006, 05:22 am »

I'm presuming it's a complete system... as for the date, hey, that's why they're being sold as excess for $25!!! The 48v ADS's we picked up from them were all dated 2002 and all four of my units have been running 6-8 hrs. a day for 6 months now with absolutely no sign of delayed charging.

I've ordered one just to see what it is... and because the muse thinks I need to be a pack rat

I picked up 8 more heat sinks too

nickspicks · « **Reply #8 on:** 19 Mar 2006, 12:31 pm »

a 5v battery pack does exist. Its made out of AA cells w/a regulator.

how much current does the SB3 need?

you could also build a voltage regulator.
http://www.iguanalabs.com/7805kit.htm

fwiw folks, i'm battery savvy, and have built DC power solutions for lots of devices. hit me up, i can help.

and here is a battery that really rocks for $50.
http://tinyurl.com/pzj9h

it has a 5v output at about 1.8amp current strength. 7.2amp capasity at this voltage. This thing is great for powering all sorts of electronics.

Gordy · « **Reply #9 on:** 19 Mar 2006, 02:01 pm »

Excellent Nick! Thank you for those links, that reg. info will be a real boon to the SB fans.

Now to hack the TRL dvp battery mod

Gordy · « **Reply #10 on:** 29 Mar 2006, 04:31 pm »

I received the battery back up yesterday and that's exactly what it is... a battery in a box, no charger included! The good news is the battery is outputting 13+ volts but... that's one expensive case! As is, the battery would have to be recharged using the same 2 pin molex like connector as used for power output. I'll try to modify it to use as a backup for my dac's RWA battery supply, but definitely not a deal.

The heat sinks I picked up are real nice though

JoshK · « **Reply #11 on:** 29 Mar 2006, 04:43 pm »

Which heatsinks did you get? For your ucd modules?

Gordy · « **Reply #12 on:** 29 Mar 2006, 05:00 pm »

I grabbed some more of the Thermalloy 2x2.5x1 http://www.excesssolutions.com/cgi-bin/item/ES3443 which I've installed on an alum. bracket I made up for mounting the UcD 400's in one of the group buy kits... turned out real nice, hope to post pics this weekend if the input caps show up in time!

JDUBS · « **Reply #13 on:** 30 Mar 2006, 03:20 am »

Quote from: nickspicks

a 5v battery pack does exist. Its made out of AA cells w/a regulator.

how much current does the SB3 need?

you could also build a voltage regulator.
http://www.iguanalabs.com/7805kit.htm

fwiw folks, i'm battery savvy, and have built DC power solutions for lots of devices. hit me up, i can help.

and here is a battery that really rocks for $50.
http://tinyurl.com/pzj9h

it has a 5v output at about 1.8amp current strength. 7.2amp capasity at this voltage. This thing is great for powering all sorts of electronics.

Nick

Is that 7805 regulator any good? Are there better out there? Seems easy enough to wire up to a 12v battery.

I'd love to try my hand at making battery power supplies for my Audigy 2 NX (feeds a Sony STR-DA2000ES) and my SB3 (feeds an Oris horn based sysem).

Thank...your links are great!!

-Jim

speedcenter · « **Reply #14 on:** 2 Apr 2006, 03:42 pm »

Quote from: Gordy

I received the battery back up yesterday and that's exactly what it is... a battery in a box, no charger included! The good news is the battery is outputting 13+ volts but... that's one expensive case! As is, the battery would have to be recharged using the same 2 pin molex like connector as used for power output. I'll try to modify it to use as a backup for my dac's RWA battery supply, but definitely not a deal.

The heat sinks I picked up are real nice though

it puts out 13+ volts because that's what a 7.2ah SLA battery ($7.90) puts out when fully charged. However, it will drop as it goes - depending on power consumption of the component this may take a while or go fast, but it will hit about 11.3V after a steady decline with use, and then it will drop to nothing in a hurry.

so since it has no charger - duh - $25? you can get an 18ah battery delivered for less. Auto chargers go from $15 for 1amp to $40 for 3amp (preferred).

Peter

speedcenter · « **Reply #15 on:** 2 Apr 2006, 03:44 pm »

Quote from: JDUBS

Nick

Is that 7805 regulator any good? Are there better out there? Seems easy enough to wire up to a 12v battery.

I'd love to try my hand at making battery power supplies for my Audigy 2 NX (feeds a Sony STR-DA2000ES) and my SB3 (feeds an Oris horn based sysem).

Thank...your links are great!!

-Jim

there are few regulators that on their own are "good" for audio use. Most are somewhat noisy. to get a good supply you need to get somewhat more complex with the circuit. If the power draw is high, though, a 7805 or LT1085 are not too bad if used with good capacitors. For lower power draw such as a clock, you can do much better.

Peter