madbeanpedals::forum

Projects => Tech Help - Projects Page => Topic started by: mikef on August 13, 2019, 10:37:21 AM

Title: Trouble with the Harbinger two
Post by: mikef on August 13, 2019, 10:37:21 AM
Hello! I have put together the Harbinger Two, but,alas, it is not running like it should.
I had a soldier bridge between two pins on theLT1054 that I corrected. (The ic got a tad bit hot, so it was replaced.)  I have it on 9v regulated bench power, and control wise, the volume is functioning as it is supposed to, the speed is not working, ie no change at either end of the sweep. The intensity, at either end of the pot produces no visible change,unless it's in the middle position. The gain and offset trimmer pots only change the brightness. Now, if I sweep my fingers over the 4 ldrs i get the swooshy goodness!
Title: Re: Trouble with the Harbinger two
Post by: mikef on August 13, 2019, 10:40:45 AM
backside. I noticed some dicey points that needed to be re-flowed and i removed one or two bridges. Now , the voltages, some are close/dead on when I do a volt reading but the following ones are off:  Q3       Q 12
                                                                                                            C 13.5        C 9.2
                                                                                                            B 4.4          B 9.08
                                                                                                            E 0.0          E  0.6

The IC LT1054 has the following
1 .01    5 0
2 4.94  6 4.9
3 0       7 5.7
4 .01    8 9.0
Any help will be so greatly appreciated

 
Title: Re: Trouble with the Harbinger two
Post by: mikef on August 14, 2019, 02:53:51 PM
Well,well,WELL.. It was a Bad I car pot.  >:(I happen to have one that was the same value for a future wah build,the  PedalBCB Tearjerker.
Title: Re: Trouble with the Harbinger two
Post by: Axeman on August 21, 2019, 11:57:56 AM
That's some bull shit, the board is faulty?
Title: Re: Trouble with the Harbinger two
Post by: HamSandwich on August 21, 2019, 12:15:51 PM
Quote from: Axeman on August 21, 2019, 11:57:56 AM
That's some bull shit, the board is faulty?

Pretty sure he said it was the potentiometer, not the board.
Title: Re: Trouble with the Harbinger two
Post by: Axeman on August 21, 2019, 12:25:04 PM
I hope so, it's my next project