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PostPosted: Sat Dec 16, 2017 10:09 pm 
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Did you adjust the trimpot (slowly!) across the entire range of its sweep? The "sweet spot" should be somewhere near its mid-point, and I see it's all the way CW in your photos.

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PostPosted: Sun Dec 17, 2017 11:45 am 
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I don't recall if it kills the output completely at the extremes of the trimmer sweep, but for the most part, it just gives "dry" output, i.e. no phasing.

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PostPosted: Sun Dec 17, 2017 3:42 pm 
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Pin 1 of your pot looks solder starved from the pictures.


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PostPosted: Sun Dec 17, 2017 6:41 pm 
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is this cap shorting?


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PostPosted: Sun Dec 17, 2017 8:26 pm 
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If you’re sure you have the correct resistor values, sounds like it’s time for an audio probe. You can google it or I think there are instructions on the site, it’s fairly simple to do.


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PostPosted: Sun Dec 17, 2017 10:26 pm 
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Unlike your chorus pedal, the voltages here look okay enough to pass signal. This means there is likely an interruption in the signal path. Like Jimi said, a signal tester would be ideal to find out what’s going on.

Sometimes this type of issue is from the footswitch or switch wire connections at lugs 5 and 7.

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PostPosted: Mon Dec 18, 2017 10:32 am 
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chongmagic wrote:
I will have to Google how to do an audio probe. I may have to buy a signal tester off the site.

You can get excellent guidance on how to build your own from the BYOC signal tester instructions. It's little more than a 1/4" jack, a 100nf (or larger) capacitor, and some wire. That said, the BYOC kit gives you everything you need, including a nice probe for the test end and an alligator clip for the ground, so it's well worth the small investment.

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PostPosted: Mon Dec 18, 2017 11:02 am 
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chongmagic wrote:
Basically you just strum the guitar and check and see if the probe on the component produces a sound. If not then that indicates where the circuit is open correct?

Basically, yes. What it tells you is that the problem is somewhere between that point and the last test point in the signal path where sound was present. So it won't usually tell you exactly where the problem is, but it will localize it and make it much easier to find. Locate the "good" and "bad" test points on the circuit schematic, and find which components, solder joints and traces need to be checked. Then use the signal tester to zero in on the defect.

BTW, the problem won't necessarily be an open circuit--could easily be a signal short to ground, as well.

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PostPosted: Mon Dec 18, 2017 11:15 am 
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A looper is great so w you don’t have to strum your guitar over and over, lugs 5 and 7 are a very good point, I always forget about the stomp.


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PostPosted: Mon Dec 18, 2017 12:03 pm 
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chongmagic wrote:
Are there any loopers at a decent cost?



Boss RC-1. $100

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PostPosted: Mon Dec 18, 2017 12:14 pm 
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duhvoodooman wrote:
I don't recall if it kills the output completely at the extremes of the trimmer sweep, but for the most part, it just gives "dry" output, i.e. no phasing.


The trim pot on the chorus biases everything, so if you don't set it correctly, you'll get no signal of any kind. The trim pot on the phase biases only the phase stages, so if you don't have it set correctly, you'll still get dry signal. So if you aren't getting any signal at all on the phaser, it's likely a problem at the input or the output buffer.

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PostPosted: Mon Dec 18, 2017 12:57 pm 
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chongmagic wrote:
....what makes up the input and output buffer?


Input buffer (op amp) on the left, output buffer (BJT) on the right:

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