Search found 6 matches

by survivorsound
Fri Sep 18, 2020 6:24 am
Forum: JLM Audio Kits
Topic: Regurgitator kit Build Thread
Replies: 107
Views: 133896

Re: Regurgitator kit Build Thread

Driving an unbalanced load, do you leave pin 3 disconnected and the gain range shifts down by 6dB?

If pin 3 is grounded at the load (to keep the gain range the same), does it stress the inverting amp by forcing it to drive 51 ohms, or does that pressure get relieved through the gain trim somehow?
by survivorsound
Tue May 19, 2020 11:52 am
Forum: JLM Audio Kits
Topic: Regurgitator kit Build Thread
Replies: 107
Views: 133896

Re: Regurgitator kit Build Thread

Thanks Joe! Are you able to share the schematic, or otherwise recommend what you’d try in terms of signal path with the LM4562/LME49720 in there?
by survivorsound
Mon May 18, 2020 8:19 pm
Forum: JLM Audio Kits
Topic: Regurgitator kit Build Thread
Replies: 107
Views: 133896

Re: Regurgitator kit Build Thread

The unbalanced 75 ohm stereo line output on our RME MADI FX card has quite good specs, but outputs +13dBu for 0dBFS. We need it to match our other converters at +20 or +24dBu. In a recent test, we found that a standard THAT 1646 circuit used to send this output to our balanced patchbay sounded great...
by survivorsound
Sat Jan 18, 2020 12:05 pm
Forum: JLM Audio Kits
Topic: dINgO Pup kit BUILD THREAD
Replies: 75
Views: 118085

Re: dINgO Pup kit BUILD THREAD

Okay that was a tad bit complicated; ignore the more finicky questions from the end of the list. I did answer some of my own, though, by determining that my newly added bipolar supply definitely wants to have its 0V tied directly to chassis ground.
by survivorsound
Tue Jan 14, 2020 6:29 am
Forum: JLM Audio Kits
Topic: dINgO Pup kit BUILD THREAD
Replies: 75
Views: 118085

Re: dINgO Pup kit BUILD THREAD

I'm putting two Pups into the shell of a broadcast series Neve line amp, to make a two-channel 3416, used as a unity gain line amp surrounding a 5K fader. The point is to go totally clean, thus no transformers. I want to make sure I have this planned out right, so I'm reviewing what I know so far, h...
by survivorsound
Sun Dec 15, 2019 7:01 am
Forum: JLM Audio Kits
Topic: Tardigrade Build Thread
Replies: 7
Views: 7070

Re: Tardigrade Build Thread

For gains between 6dB and 12dB, one would add a resistor across the gain pads, correct?