An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Don't complain about the color, I didn't choose it ...
Shematic used is from the National datasheet for the LM1036
http://www.national.com/pf/LM/LM1036.html
The snubber is a 0.1uF across every diode, didn't try Carlos
(tm) snubber yet. I used standard parts, and the quality is much better then commercial amps which would cost the same or more.
The whole build was something like 75 Eur, but I got the transformers cheap, only 7.5 Eur a piece (24V 80VA).
Case and heatsink I got nearly for free from a local scapyard.
Barely, she is 8 years old. But she knows how to operate it, especially the Volume...
GeWa said:You're a COOL dad.
I absolutely, positively second that!!
Giving children the means to appreciate music is the best thing!
My only comment about the amp, and it is MINOR, is why was the volume put in between the tone controls?
Why not in a logical order Bass, Treb, Bal then Vol or the other way around?
I will build one for my 9 and 7 yr old... As of now they each have crappy portable(boombox) players that they listen to EVERY night as they read before bed.
This made the printlayout more easy. If you want to see the layout, have a look here:
http://www.sayang.demon.nl/projects/lm1036/lm1036.html
uvodee said:
I know that this was not directed to me, but I have some experience with them. The first time I ordered, everything was fine. The second time, I ordered a multimeter. They sent me the wrong model, plus it didn't work. They sent me a replacement, which still wasn't the one that was advertised on the website. I ended up sending both of them back. The last time I ordered from there, I got an email that the order was being packaged. I waited for a month, and got nothing. I had an order number, but it wasn't in their database (tried to check status on web site). I kept emailing them, and found out that they were missing some part (remember that this was a month later). And this is what I get from them:
After a month, they didn't even know what I ordered!!
I paid with a credit card, and they charged me about 20 cents extra (this was a year ago, so I don't remember exactly, and I don't feel like looking it up). A week or two later, they charge $0.66 to the card for no reason. It took about 10 emails to finally get them to respond, refund the money, and to find out why they charged it. 66 cents is nothing, but since they screwed up that much, I had no reason not to complain.
All the prices on their web site were in U.S. dollars, and they tried to give me some crap about exchange rates. They refunded the 66 cents, and I never bought from them again.
I placed in total 20 orders with Futurlec, 2 of them being PCB fabrication. Orders went smooth, when some parts were missing I received them with no additional cost.
Only issue I have is the webcontrol board, information on the Futurlec website is misleading. I know from someone who ordered this board a few months after me , he got a CD with even less documentation / programs. Of course I have sent him a copy of my disc. This board is originally made by ETT which didn't even bother to answer my emails.
Next time I go for a holiday in Thailand I'm going to visit both Futurlec & ETT.
Only issue I have is the webcontrol board, information on the Futurlec website is misleading. I know from someone who ordered this board a few months after me , he got a CD with even less documentation / programs. Of course I have sent him a copy of my disc.
This board is originally made by ETT which didn't even bother to answer my emails. Next time I go for a holiday in Thailand I'm going to visit both Futurlec & ETT.
thanks..
went to your website Roland,
took the layout, and copied it slightly adjusted .....
I was thinking of finishing it today but i forgot to order the .39 uf caps
I have all the other stuff including ppots etc....
by the way, the psu I am using (toroid form allelectronic) has approc 13.5 volts dc and 1.05 A
do you think it will hold out?
went to your website Roland,
took the layout, and copied it slightly adjusted .....
I was thinking of finishing it today but i forgot to order the .39 uf caps
I have all the other stuff including ppots etc....
by the way, the psu I am using (toroid form allelectronic) has approc 13.5 volts dc and 1.05 A
do you think it will hold out?
Attachments
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.