Search found 123 matches

by paulrichards7
Sun Feb 15, 2009 7:02 pm
Forum: Creative Recording
Topic: Noise on mixer channels, please help!
Replies: 43
Views: 12010

Hi, Whilst comparing the 2 different channels, Ive realised that there are different resistors elswhere These are the ones in the pics with red rings around them http://i390.photobucket.com/albums/oo345/paulrichards7/Red-n-green.jpg http://i390.photobucket.com/albums/oo345/paulrichards7/resistor-sch...
by paulrichards7
Thu Feb 12, 2009 2:22 pm
Forum: Creative Recording
Topic: Recapping ala Jim Williams
Replies: 18
Views: 5311

hey andy
thanks for that
paul
by paulrichards7
Thu Feb 12, 2009 4:58 am
Forum: Creative Recording
Topic: Recapping ala Jim Williams
Replies: 18
Views: 5311

hi themagicmanmdt,
thanks for that
paul
by paulrichards7
Wed Feb 11, 2009 1:16 pm
Forum: Creative Recording
Topic: Recapping ala Jim Williams
Replies: 18
Views: 5311

Just out of curiosity, what sets the high frequency roll off
thanks
paul
by paulrichards7
Wed Feb 11, 2009 1:11 pm
Forum: Creative Recording
Topic: Recapping ala Jim Williams
Replies: 18
Views: 5311

From what i understand, its best to keep legs as short as possible
Otherwise there is more resistance, i think?
the others will clarify this though
paul
by paulrichards7
Tue Feb 10, 2009 10:22 pm
Forum: Creative Recording
Topic: Recapping ala Jim Williams
Replies: 18
Views: 5311

Here is a High pass corner frequency calculator
http://www.opamplabs.com/rfc.htm
Paul
by paulrichards7
Sun Feb 08, 2009 8:42 am
Forum: Creative Recording
Topic: Bypassing insert and direct out
Replies: 5
Views: 1194

sorry the scum My current hunch is that when the strips were revised, resistor values in the preamp were swizzled to drop the noise...or that the added metal film resistors really are important. i have gathered and tried so much info that i have overlooked your recommendation sorry for not seeming g...
by paulrichards7
Sun Feb 08, 2009 8:35 am
Forum: Creative Recording
Topic: Recapping ala Jim Williams
Replies: 18
Views: 5311

Thanks for that Jim
Could you elaborate a liitle bit more on the math of
Use the standard 2xpi/rc formulas to determine the -3 db roll-off points.
Thanks
Paul
by paulrichards7
Sat Feb 07, 2009 9:57 pm
Forum: Creative Recording
Topic: Bypassing insert and direct out
Replies: 5
Views: 1194

To shorten the audio path and reduce noise
paul
by paulrichards7
Sat Feb 07, 2009 9:39 pm
Forum: Creative Recording
Topic: Recapping ala Jim Williams
Replies: 18
Views: 5311

Recapping ala Jim Williams

So I came across these words of wisdom for Jim Williams: Another problem with leaving in older caps is for one they are usually too small in value. Designers typically use the smallest and cheapest parts they can so low end roll off are set to 20 hz or so. That will create phase shift beginning at 2...
by paulrichards7
Sat Feb 07, 2009 9:27 pm
Forum: Creative Recording
Topic: Bypassing insert and direct out
Replies: 5
Views: 1194

Bypassing insert and direct out

Hi
I never use the insert or direct outs on my board so i just want to bypass those circuits
Is there anything I need to be aware of or tips for bypassing the elctronics
Here is the schematic
http://i390.photobucket.com/albums/oo34 ... noline.jpg
Thanks
Paul
by paulrichards7
Sat Feb 07, 2009 9:14 pm
Forum: Creative Recording
Topic: PSU recapping
Replies: 3
Views: 751

thanks guys
paul
by paulrichards7
Thu Feb 05, 2009 8:19 pm
Forum: Creative Recording
Topic: PSU recapping
Replies: 3
Views: 751

PSU recapping

So Im gonna recap my PSU http://i390.photobucket.com/albums/oo345/paulrichards7/PSU-1.jpg Should I double the size of caps, but keep the same voltage? Ive heard that PSU caps are severely underated What about those green chicklet caps? http://i390.photobucket.com/albums/oo345/paulrichards7/PSU.jpg I...
by paulrichards7
Wed Jan 28, 2009 7:34 pm
Forum: Creative Recording
Topic: Capacitors, again
Replies: 7
Views: 1748

I have replaced all ICs, transistors, diodes and resoldered all connections
Still noise?
Paul
by paulrichards7
Tue Jan 27, 2009 2:37 pm
Forum: Creative Recording
Topic: Noise on mixer channels, please help!
Replies: 43
Views: 12010

Hi, the latest
Ive replaced all TL072, All transitors and the diodes
Re-soldered every connection
And guess what?
Still noise
Anymore ideas
Thanks so much for all your help
Paul