madbeanpedals::forum

Projects => Tech Help - Projects Page => Topic started by: jimilee on April 30, 2013, 08:38:35 PM

Title: Retrograde: Chasing Unicorns,SOLD right here in a tech thread!
Post by: jimilee on April 30, 2013, 08:38:35 PM
So I built a retrograde for my guitarist,works beautifully, built one for myself,melted down during the troubleshooting phase,pretty exciting. This is third one,and I can't seem to get unity on the effect. Am I just chasing unicorns?

I've reflowed everything a couple of times. Checked values as well. A second set of eyeballs would be very helpful and kind. Thank you.
Q1
C-4.3
b-2.8
E-2.8

Q2
c-9.4
b-2.8
e-2.4

Q3
c-5
b-2.3
e-1.7

(https://dl.dropboxusercontent.com/u/5560115/help.jpg)
(https://dl.dropboxusercontent.com/u/5560115/help2.jpg)
(https://dl.dropboxusercontent.com/u/5560115/help3.jpg)
Title: Re: Retrograde: Chasing Unicorns
Post by: jimilee on May 08, 2013, 12:59:29 AM
bump before it goes to the box of fail
Title: Re: Retrograde: Chasing Unicorns
Post by: wgc on May 08, 2013, 03:00:26 AM
Check the tran sockets for good contact.  Also check the diodes, sometimes you can break the glass ones bending leads.
Title: Re: Re: Retrograde: Chasing Unicorns
Post by: jimilee on May 08, 2013, 03:41:07 AM
Cool , will do
Title: Re: Retrograde: Chasing Unicorns
Post by: jimilee on May 08, 2013, 04:14:38 PM
replaced the trannies and the diodes,still got nothing above unity,any body got any more eyes they can lend or suggestions?
Title: Re: Retrograde: Chasing Unicorns
Post by: gingataff on May 08, 2013, 04:25:39 PM
Just mentioning this as I don't think it's been asked yet, is the transformer the right way around?
Title: Re: Re: Re: Retrograde: Chasing Unicorns
Post by: jimilee on May 08, 2013, 07:17:56 PM
Quote from: gingataff on May 08, 2013, 04:25:39 PM
Just mentioning this as I don't think it's been asked yet, is the transformer the right way around?
sure is. I've checked the resistors, I'm thinking I may have a bag of resistors mislabeled, can someone tell me the resistors in the audio path, or look at them and see if this makes sense?
Title: Re: Retrograde: Chasing Unicorns
Post by: jimilee on May 09, 2013, 04:04:49 PM
anyone want to buy it? needs to be debugged.$10 ppd U.S.
Title: Re: Retrograde: Chasing Unicorns
Post by: jimilee on May 09, 2013, 09:24:52 PM
SOLD!