Search found 70 matches

by Crusty
Thu Apr 23, 2009 3:19 am
Forum: Pro Audio Design
Topic: NE570-based NR compander (P-522) by JR
Replies: 34
Views: 54676

Re: NR compander (P-522)

I agree with John that tricks are best performed elsewhere. ;) Alright then, I shall resist. LOL John, I remember you mentioned that bootstrapping trick once, and I stored it away in my noggin for possible later use. I'm more of a cookbook guy than a textbook guy, but examples of stuff like that ar...
by Crusty
Tue Apr 21, 2009 1:51 pm
Forum: Pro Audio Design
Topic: NE570-based NR compander (P-522) by JR
Replies: 34
Views: 54676

Re: NR compander (P-522)

Ah, I forgot about that effect - a plus maybe for keeping the cap there. Too bad it has to be so large...
by Crusty
Tue Apr 21, 2009 4:04 am
Forum: Pro Audio Design
Topic: NE570-based NR compander (P-522) by JR
Replies: 34
Views: 54676

Re: NR compander (P-522)

mediatechnology wrote:
We would never go off topic here
Yes, where are the moderators?...

What do you think about adapting the sliding 'wow filter' hpf into a preamp? Seems like it might make for a sort of rumble filter...
by Crusty
Tue Apr 21, 2009 3:54 am
Forum: The Peabody Lounge
Topic: Another reason not to buy used appliances from Crusty...
Replies: 11
Views: 15776

Re: Another reason not to buy used appliances from Crusty...

Not too hard S.S. - a good thing cuz I had to drill/tap a 2-56 hole into the side. It was absolutely perfect diameter and had the 'D' cut I needed on one end already, so it was meant to be. Weird how that works out sometimes. It was a simple plastic shaft that broke - the plastic got all "chalky" fr...
by Crusty
Mon Apr 20, 2009 6:28 pm
Forum: The Peabody Lounge
Topic: Another reason not to buy used appliances from Crusty...
Replies: 11
Views: 15776

Another reason not to buy used appliances from Crusty...

No beer bottle used this time though - I ended up fixing my dishwasher with the metal shaft from a male Elco connector - I'm not paying $200 bucks for a soap dispenser! I just need to explain to the wife how it operates a little differently now...LOL
by Crusty
Mon Apr 20, 2009 5:57 pm
Forum: Build
Topic: Hum differences in toroidal power transformers...
Replies: 2
Views: 10216

Hum differences in toroidal power transformers...

Observations and not a scientific experiment by any means but... I had, on-hand, three different brands (two or three of each brand) of stock toroidal transformers from Amveco, Avel-Lindberg, and Multicomp. All were15V 50W ratings. I swapped them into a PSU connected to a circuit pulling about 25W. ...
by Crusty
Mon Apr 20, 2009 5:30 pm
Forum: Pro Audio Design
Topic: An Improved Servo for the THAT1510 and THAT1512
Replies: 32
Views: 71197

Re: An Improved Servo for the THAT1510 and THAT1512

Hi Wayne,

Wondering a bit more about the tempco - Did you disable the Vos buffer as well as the servo when you did your temp experiments? How many 1510's samples did you try?
by Crusty
Mon Apr 20, 2009 5:25 pm
Forum: Pro Audio Design
Topic: NE570-based NR compander (P-522) by JR
Replies: 34
Views: 54676

Re: NR compander (P-522)

I got to play with this a little this weekend by scabbing into an eq. Not really needed as the opamp I used recovers quite nicely on its own. It does make for a nice effect when abused (!) I 'nested' a few sets across the feedback path and could get a nice and smooth limiting effect. I want to try s...
by Crusty
Wed Apr 15, 2009 3:22 am
Forum: Pro Audio Design
Topic: An Improved Servo for the THAT1510 and THAT1512
Replies: 32
Views: 71197

Re: An Improved Servo for the THAT1510 and THAT1512

Hey, nice work Wayne! You do need to spill the beans on your coupling cap experiments too. LOL

No worries about tempurature drift? The switch you characterized is a break-before-make?
by Crusty
Wed Apr 15, 2009 3:14 am
Forum: Pro Audio Design
Topic: NE570-based NR compander (P-522) by JR
Replies: 34
Views: 54676

Re: NR compander (P-522)

Sounds like it will be a snap to assemble once the case design is worked out and you lose all that secondary machining. I think the "half or list price" must have been for the existing product line we were talking about. This guy shut down his factory and moved production to a contract manufacturer....