Kube 0 Report post Posted January 21, 2006 question...there are 4 points on the recitifier ic....1 negative, 1 positive, and 2 waveforms. I'm not sure what connects to what. Share this post Link to post Share on other sites
siriuz 0 Report post Posted January 21, 2006 (edited) the 2 curly lines ( ~ ) connect to AC from your transformer , + is the top part of the 4 joined diodes you see on the schematics, and - is the bottom one. i'll attach a picture in awhile to make it clearer edit: heres the pic Edited January 21, 2006 by siriuz Share this post Link to post Share on other sites
Kube 0 Report post Posted January 21, 2006 Also asking....can power from a dc supply work? I have access to a dc supply, but can I use on the amp part? Share this post Link to post Share on other sites
Kippei 0 Report post Posted January 21, 2006 Negative. You need AC current to do the voltage multipler. Share this post Link to post Share on other sites
squalle 0 Report post Posted January 21, 2006 errr for op-amp part only, then u can if you can get DC supply of 60v then of course u can but I've never seen a walwart supplying 60v so kube, have u started assemblying all the parts you bought last night? anything lacking? Share this post Link to post Share on other sites
Kube 0 Report post Posted January 21, 2006 heh, haven't started assembling yet... taking things slow. The first time I rushed into the cmoy2, I wrecked it. Taking it one step at a time Share this post Link to post Share on other sites
Kippei 0 Report post Posted January 22, 2006 I still got 1 wheeing sound that i haven solved yet. Whenever i touch the wires from the pot to the tube the wheeing increases. So how to fix this problem? Share this post Link to post Share on other sites
squalle 0 Report post Posted January 22, 2006 any interference source nearby? fluorescent lamp? big fan? Share this post Link to post Share on other sites
Kippei 0 Report post Posted January 22, 2006 hmmm a fan but it is those big stand one not on my table Share this post Link to post Share on other sites
squalle 0 Report post Posted January 22, 2006 wait... only when you touch u get the whee-ing sound? if so, then it's normal ur body intro interference to the signal, before amplification, and the interference will get magnified too that's why when u touch the output wire, no significant effect Share this post Link to post Share on other sites
Kippei 0 Report post Posted January 22, 2006 I follow u coil a bunch of wires around the input wire. Although it drop the whee by a lot. I still can hear a bit of whee and hum... I think the only way to cancel all the interference is to use a PCB... Share this post Link to post Share on other sites
squalle 0 Report post Posted January 22, 2006 errmmm a lot ppl managed to get a dead quiet amp with ptp any criss-crossing lines that's offending? Share this post Link to post Share on other sites
Kippei 0 Report post Posted January 22, 2006 next time i bring it over to you to help me troubleshoot.... Share this post Link to post Share on other sites
squalle 0 Report post Posted January 22, 2006 sure I'd be glad to help you but in the mean time dun give up.... c'mon. keep checking and probing around just be careful dun get stung Share this post Link to post Share on other sites
Kippei 0 Report post Posted January 22, 2006 okay i trace it down to the bipolar power and the opamp. I took out the tube, now we are only left with these 2. Now i hear the faint wheee again... Any idea? Share this post Link to post Share on other sites
