Search found 8 matches

by rmiller335
Sun Mar 09, 2014 2:41 am
Forum: JLM Audio Kits
Topic: dINgO Pup kit BUILD THREAD
Replies: 72
Views: 81796

Re: dINgO Pup for distortion effect

Hi, Joe. I think the last time I was here was asking your advice for using Dingo's to provide makeup gain for a summing bus. I finally got that built and it works great. I'm thinking about building a (very) poor man's Culture Vulture. I'm a big fan of the Tube Screamer circuit for guitar and have bu...
by rmiller335
Wed Apr 24, 2013 10:28 pm
Forum: JLM Audio Kits
Topic: DINGO PCB and kit BUILD THREAD
Replies: 104
Views: 129503

Re: DINGO PCB and kit BUILD THREAD

I knew there was a stupid mistake in there somewhere. That did it, thanks.
by rmiller335
Wed Apr 24, 2013 2:37 am
Forum: JLM Audio Kits
Topic: DINGO PCB and kit BUILD THREAD
Replies: 104
Views: 129503

Re: DINGO PCB and kit BUILD THREAD

By the way, I checked the output pin of the second op amp and that's also very low.
by rmiller335
Wed Apr 24, 2013 2:30 am
Forum: JLM Audio Kits
Topic: DINGO PCB and kit BUILD THREAD
Replies: 104
Views: 129503

Re: DINGO PCB and kit BUILD THREAD

Okay, I had the PS voltage set too low. With that at 48v, all the voltages look okay. The 24v zeners are fitted, and I added 20k resistors in series with my signal (I was using a mic level signal and thought that would be okay). With all that done, I'm getting signal with good gain at the unbalanced...
by rmiller335
Mon Apr 22, 2013 4:36 am
Forum: JLM Audio Kits
Topic: DINGO PCB and kit BUILD THREAD
Replies: 104
Views: 129503

Re: DINGO PCB and kit BUILD THREAD

Thanks, Joe. The power supply caught the short and saved the resistors. I've still got something wrong though. I wired everything up today and put the opamps in. When I put the op amps in the voltages went from 20.33v/19.62v to 15.53v/23.9v, and it's just barely passing signal. What do you think? Ch...
by rmiller335
Sun Apr 21, 2013 6:24 am
Forum: JLM Audio Kits
Topic: DINGO PCB and kit BUILD THREAD
Replies: 104
Views: 129503

Re: DINGO problem solved

It turns out both zener diodes were shorted. Not sure how that happened, but I replaced them and the voltages are good. Now to wire it up and see what it does with a signal.

Cheers,
Bob Miller
by rmiller335
Tue Apr 16, 2013 11:45 pm
Forum: JLM Audio Kits
Topic: DINGO PCB and kit BUILD THREAD
Replies: 104
Views: 129503

Re: DINGO Problems

I'm finally getting around to the summing bus I asked about last summer. I've constructed one of the boards, according to the drawings you sent me, and the board measures 11-12 ohms from +vs to 0v and from 0v to -vs, which the PS reads as a short. I am including links to the drawings and a photo of ...
by rmiller335
Thu May 31, 2012 11:56 pm
Forum: JLM Audio Kits
Topic: DINGO PCB and kit BUILD THREAD
Replies: 104
Views: 129503

Dingo for passive summing makeup gain.

An EE I'm not, although I've built several guitar amps, preamps and have a BA4 in my rack. I am thinking that I can use a diyrecordingequipment.com endless summer with a couple of Dingos with 99v's and JLM111DC's to make a line level in & out summing amp. Does that sound reasonable, and is there...

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