Pot questions - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 17th August 2004, 03:49 PM   #1
Vikash is offline Vikash  United Kingdom
diyAudio Moderator Emeritus
 
Vikash's Avatar
 
Join Date: May 2003
Location: UK
Default Pot questions

Should the pot shaft be insulated from the chasis? i.e. do you use some plastic isolating washers to mount it to the chasis? Is the shaft extender used in Peter Daniel's group chasis for isolatation purposes as well?

I am going to use the Vishay Sfernice P11 dual 10k linear pot with a 1.5k ohm law faking resistor with my GC (brian's kit). What wattage is required for the resistor? Is 0.25W enough?
__________________
"The human mind is so constituted that it colours with its own previous conceptions any new notion that presents itself for acceptance." - J. Wilhelm. (But I still think mine sounds better than yours.)
  Reply With Quote
Old 17th August 2004, 03:57 PM   #2
diyAudio Member
 
Peter Daniel's Avatar
 
Join Date: Jul 2002
Location: Toronto, Canada
Send a message via AIM to Peter Daniel
I use plastic tube out of convenience only, and never though about isolating the shaft (although it seems to be isolated that way). The pot's housing is connected to the chassis anyway, and it's better when it is, as it's provide extra shielding. As to the shaft, I don't think it matters.
__________________
www.audiosector.com
“Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC
  Reply With Quote
Old 17th August 2004, 04:03 PM   #3
diyAudio Member
 
Join Date: Mar 2001
Location: Brazil
Default Re: Pot questions

Quote:
Originally posted by Vikash
Should the pot shaft be insulated from the chasis? i.e. do you use some plastic isolating washers to mount it to the chasis? Is the shaft extender used in Peter Daniel's group chasis for isolatation purposes as well?

I am going to use the Vishay Sfernice P11 dual 10k linear pot with a 1.5k ohm law faking resistor with my GC (brian's kit). What wattage is required for the resistor? Is 0.25W enough?
You may want to isolate the pot shaft to block external AC sources, like your body, when you move it. That is if your knob is metal your body may induce hum.

If the knob is plastic you don't need to worry about it.

The faking resistor can be .25W.


Carlos E. Martinez
  Reply With Quote
Old 17th August 2004, 05:48 PM   #4
Vikash is offline Vikash  United Kingdom
diyAudio Moderator Emeritus
 
Vikash's Avatar
 
Join Date: May 2003
Location: UK
I think I'll go with a 6mm OD plastic tube from B&Q if I can find one and use the shaft extenders from an old dismantled amp, and attach the pot housing without washers. Thanks for the replies.

How important is the quality of the resistors for law faking?
__________________
"The human mind is so constituted that it colours with its own previous conceptions any new notion that presents itself for acceptance." - J. Wilhelm. (But I still think mine sounds better than yours.)
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Some Quad els57 questions! - Novice Questions! Fanuc Planars & Exotics 13 5th December 2007 09:26 AM
PSU for QSC amp questions rkc7 Parts 5 10th November 2005 05:18 PM
Last questions about this Madmike2 Multi-Way 9 13th June 2005 11:12 PM
Questions, questions, from newb DIYer Phatman91624 Multi-Way 41 3rd August 2002 02:52 AM


New To Site? Need Help?

All times are GMT. The time now is 11:16 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2