I've fallen foul of not measuring components before fitting [emoji3]. I had a 100R in a pack of 100k RND65 once. I also had a bad diode once that took some trouble shooting.
Glad you sorted it. I'm quite intrigued by a small Dumble ODS type and with reverb.
And I have a pair of 6V6 sat here staring at me.....
Marcus
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New build, OD needs help, Solved, clip added
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- norburybrook
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- martin manning
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Re: New build, OD needs help
Glad you solved it. How was it that the reverb worked fine in clean mode?
Re: New build, OD needs help
I'm a big fan of low power Dumble circuits. Dumbles in general sound ok with the master turned down, but there's nothing like a cranked up Dumble. By using 2x6V6s you can crank it and enjoy without losing your hearing.norburybrook wrote: ↑Tue Jan 02, 2018 11:01 pm I've fallen foul of not measuring components before fitting [emoji3]. I had a 100R in a pack of 100k RND65 once. I also had a bad diode once that took some trouble shooting.
Glad you sorted it. I'm quite intrigued by a small Dumble ODS type and with reverb.
And I have a pair of 6V6 sat here staring at me.....
Marcus
Sent from my Nexus 6 using Tapatalk
Re: New build, OD needs help
Well it worked, but I lost a lot of power. Apparently the OD side was more impacted than the clean side.martin manning wrote: ↑Tue Jan 02, 2018 11:17 pm Glad you solved it. How was it that the reverb worked fine in clean mode?
Re: New build, OD needs help, Solved, clip added, wierd things
Well that was strange...
I went to put this chassis in a Princeton Reverb combo cab with a 12" installed, the xformer didn't clear, just a tad bigger than the PR xformer. I moved it over an inch so it would fit. Fired it up and damn..sounded terrible again, just like before.
I i thought there might be some PO but my scope is broken, so I opened up the scope to start troubleshooting, manual is on-line. Now the damn thing is working. Self healing scope?
I watched a sine wave through the gain stages, exactly what I'd expect. Check for PO, I don't see any. Connected it to the speaker in the princeton cab with the chassis on the bench, it sounds glorious.
Color me confused. Gig tomorrow so I need the Princeton working, I'll just back in next week.
I went to put this chassis in a Princeton Reverb combo cab with a 12" installed, the xformer didn't clear, just a tad bigger than the PR xformer. I moved it over an inch so it would fit. Fired it up and damn..sounded terrible again, just like before.
I i thought there might be some PO but my scope is broken, so I opened up the scope to start troubleshooting, manual is on-line. Now the damn thing is working. Self healing scope?
I watched a sine wave through the gain stages, exactly what I'd expect. Check for PO, I don't see any. Connected it to the speaker in the princeton cab with the chassis on the bench, it sounds glorious.
Color me confused. Gig tomorrow so I need the Princeton working, I'll just back in next week.
- JazzGuitarGimp
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Re: New build, OD needs help, Solved, clip added
If you inadvertantly had your scope in x-y mode, that would explain the issue of no sweep.
Lou Rossi Designs
Printed Circuit Design & Layout,
and Schematic Capture
Printed Circuit Design & Layout,
and Schematic Capture
Re: New build, OD needs help, Solved, clip added
That’s the first thing I checked. I’ve had this scope for maybe 30 years and I hope I know how to use it, but you never know, lots of stuff has fallen out of this brain.JazzGuitarGimp wrote: ↑Tue Jan 30, 2018 3:58 am If you inadvertantly had your scope in x-y mode, that would explain the issue of no sweep.