Author Topic: "Little Angel" - Super Simple PT2399 Mini Chorus  (Read 498030 times)

Govmnt_Lacky

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #220 on: September 03, 2010, 12:08:23 PM »
I dont know if it is particular to this circuit however, I have put Op Amps in backwards and they have survived in most situations..... Actually 1 situation since it has only happened twice! So I guess you have a 50/50 shot.

Good Luck!  ;D
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clamup1

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #221 on: September 03, 2010, 03:07:27 PM »
numbers

1-8.1
2-8.37
3-8.75
4-8.75
5-8.29
6-8.26
7-8.26
8-8.80

this is with the battery in and on the neg side.

Govmnt_Lacky

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #222 on: September 03, 2010, 06:05:57 PM »
Uhhhhhh.... Hate to say it but. THAT BAD BOY IS FRIED!!!

That is unless you ran supply power to EVERY pin. You should have Input power on pin 8 and Ground on pin 4.
A Veteran is someone who, at one point in his or her life, wrote a blank check made payable to The United States of America
for an amount of ‘up to and including my life.’

clamup1

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #223 on: September 03, 2010, 11:18:25 PM »
i was wondering why i had power on all the pins. damn. oh well i got more coming. i was hoping i would get this one to work first time

waltk

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #224 on: September 04, 2010, 12:16:56 AM »
Quote
oh well i got more coming.

5532 opamps are highly recommended (a little low on the input impedance, but a great driver on output).  Not to start a debate or anything, but between these and TL072 you are pretty well covered for anything you would want to build.  Someone is selling 50 5532's on Ebay for 10.99 (including shipping) at the moment.  If you plan to continue building DIY stompboxes, I would just order a nice supply.

clamup1

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #225 on: September 04, 2010, 09:19:58 AM »
i ordered some from small bear yesterday. i should of checked out ebay. thanks for the info. ill check them next go round

John Lyons

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #226 on: September 04, 2010, 09:50:37 AM »
Quote
oh well i got more coming.
  Someone is selling 50 5532's on Ebay for 10.99 (including shipping) at the moment. 

Thanks for the tip. I got 50 and some caps as well.
50ish pages of non sorted items later... ::)
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Pigyboy

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #227 on: September 04, 2010, 10:32:44 AM »
Hmm, I can only find a link for 50 x 5532's for $14.95 + 5 shipping on ebay. 

Will 5534's work as well? Is it much difference between the 5532 and the 5534?
I have a bunch of the 34's but no 32's.
And you'll have to admit, I'll be rich as shit
I'll just sit and grin, the money will roll right in....
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John Lyons

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #228 on: September 04, 2010, 10:54:33 PM »
A 5534 is a single op amp. A 5532 is a dual.

This is the only current auction the guy has for 5532s now.
Still a good deal.
http://cgi.ebay.com/Lot-50-NE5532-NE5532P-5532-Dual-Low-Noise-OP-Amp-/220664349135?pt=LH_DefaultDomain_0&hash=item33609ec1cf
Basic Audio Pedals
www.basicaudio.net/

Earthscum

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #229 on: September 04, 2010, 11:02:25 PM »
That's not bad. That comes out to 28 cents apiece. Tayda has them for 32 cents each, if you don't need 50. For $14.60 (after shipping) you still get 40. That's not bad, either.

http://www.taydaelectronics.com/servlet/the-93/5532-DUAL-INSTRUMENTS-LOW/Detail
Give a man Fuzz, and he'll jam for a day... teach a man how to make a Fuzz and he'll never jam again!

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clamup1

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #230 on: September 06, 2010, 05:00:55 PM »
oh i used a 3904 as the tranie. i read it could be used but didnt look to see if anything else had to be changed. will it work when i get the new chip or ar there other things that need to be changed?

frequencycentral

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Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #231 on: September 06, 2010, 05:05:51 PM »
oh i used a 3904 as the tranie. i read it could be used but didnt look to see if anything else had to be changed. will it work when i get the new chip or ar there other things that need to be changed?

The 3904 is a NPN transistor. The 'tranny' in this circuit is not a 'tranny', it's a 5v voltage regulator.


culturejam

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #232 on: September 06, 2010, 06:23:06 PM »
oh i used a 3904 as the tranie. i read it could be used...

Where did you read that?

Earthscum

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #233 on: September 06, 2010, 07:31:20 PM »
oh i used a 3904 as the tranie. i read it could be used but didnt look to see if anything else had to be changed. will it work when i get the new chip or ar there other things that need to be changed?

This doesn't use a transistor as the controlling element for the LFO like the designs for other PT delays use. This has 2 chips, a 5V regulator, and a handful of Resistors and caps (and whatever else you want to mod it with). The LFO connects directly to the chip.
Give a man Fuzz, and he'll jam for a day... teach a man how to make a Fuzz and he'll never jam again!

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clamup1

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #234 on: September 07, 2010, 03:53:26 AM »
i thought i read it in there somewhere oh well. now i need to beg the wife for more money.  :icon_redface:

Taylor

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Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #235 on: September 07, 2010, 04:12:12 AM »
That is indeed an unfortunate tranny surprise.

Pigyboy

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #236 on: September 07, 2010, 06:59:27 AM »
That is indeed an unfortunate tranny surprise.
Had a 'Trannie' surprise in a bathroom in SF one night. Indeed, unfortunate.
And you'll have to admit, I'll be rich as shit
I'll just sit and grin, the money will roll right in....
                                                            - FANG

clamup1

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #237 on: September 10, 2010, 03:53:52 PM »
hey does the words on the LFO go toward the ic or away from it.

clamup1

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #238 on: September 10, 2010, 04:17:58 PM »



[/quote]

sorry i found the pic

i get clean sound. no chorus. its prob the offboard wiring. i hate offboard wiring

Güero

Re: "Little Angel" - Super Simple PT2399 Mini Chorus
« Reply #239 on: September 10, 2010, 06:45:53 PM »

i get clean sound. no chorus. its prob the offboard wiring. i hate offboard wiring
[/quote]






I think that 7805 regulator is inverted...

Try the actual orientation

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