Building battery back for old Ghettoblaster. - diyAudio
Go Back   Home > Forums > General Interest > Everything Else

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 8th January 2008, 04:41 PM   #1
diyAudio Member
 
Join Date: Dec 2007
Location: United Kingdom
Send a message via MSN to Williham
Default Building battery back for old Ghettoblaster.

Hey all, I've just got myself an old Sony Fh-7 Ghettoblaster from ebay, its an old mid 80's thing which is meant to be high quality as far as sound goes. Trouble is you used to be able to buy a rechargeable battery pack for the model, however they are now extremely rare, so I've decided to build myself one instead.
I was just wondering if anyone knew a good website to get some decent batteries, as its easy to find aa/d/c batteries, but I was looking for a more all in one solution rather than a mass of aa's... And don't realy know where to look?
Also, as far as a recharging circuit goes would one be difficult to build?
Cheers,
Will
  Reply With Quote
Old 8th January 2008, 05:16 PM   #2
Nordic is offline Nordic  South Africa
diyAudio Member
 
Nordic's Avatar
 
Join Date: Sep 2005
Electric drill battery?
  Reply With Quote
Old 8th January 2008, 05:36 PM   #3
diyAudio Member
 
Join Date: Feb 2006
Location: Chicago, IL
How many volts?

There are a few of us building boomboxes, either from scratch or gutting old blasters like yours and putting in class D amps and better drivers. From what I've seen, people are using either lead acid gel cells or lithium, most commonly salvaged from old laptop supplies.

The lead acids, while heavy, work very well, and come in a variety of amp-hour sizes, but you're generally limited to 6, 12 and 24 volts as far as chargers go. Actual voltages run a little higher than nominal, also. There are good, computer-controlled chargers that will keep them in a good chemical and electrical state.

Lithiums stack up in 3.7v increments usually, and obviously need to be charged properly to avoid them overheating/exploding.

For either, you might poke around batteries.com and see what suits your needs.

NiMH packs have the problem of low internal resistance, which means they drain out while idle, so you have to keep them topped up.

--Buckapound
  Reply With Quote
Old 8th January 2008, 05:58 PM   #4
diyAudio Member
 
neutron7's Avatar
 
Join Date: Dec 2003
Location: Toronto Canada
if you have the old one there are places (here anyways) who will replace the cells in cordless drill and laptop batteries.

my 10 year old dewalt drill is better than new with more powerful batteries.

one is "the source by circuit city" which bought all the radio shack stores and stopped selling any electronics parts.
  Reply With Quote
Old 8th January 2008, 06:28 PM   #5
diyAudio Member
 
Pjotr's Avatar
 
Join Date: Nov 2002
Location: Netherlands
Quote:
Originally posted by Buckapound

Lithiums stack up in 3.7v increments usually, and obviously need to be charged properly to avoid them overheating/exploding.
My 2 cents:

Stay away from lithium batteries if you donít fully understand them, especially in high voltage stacks. These are wonderful and powerful batteries but they need a complex battery management system to keep them alive and safe. I.e. they canít stand any bit of over charge.

Cheers
  Reply With Quote
Old 8th January 2008, 06:40 PM   #6
diyAudio Member
 
Join Date: Dec 2007
Location: United Kingdom
Send a message via MSN to Williham
I dont actualy know the voltage yet, as I've just ordered it from ebay and it hasen't arrived.
I haven't actualy got the old battery, the guy selling it never had it.
As weight is no issue for me I'll have a look at some lead acid battery's.
Thanks for the advice!
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Ghettoblaster project klavikka Everything Else 7 13th July 2007 03:14 PM
Self-Building Battery, For Microscopic Spaces Nordic Everything Else 0 19th February 2007 09:45 AM
Building a dual rail battery power supply? pjpoes Parts 4 22nd January 2007 08:10 PM
Building a battery powered guitar mp filholder Instruments and Amps 2 27th November 2006 02:27 PM


New To Site? Need Help?

All times are GMT. The time now is 01:52 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2