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 23rd December 2003, 11:13 AM   #1
diyAudio Member
 
Join Date: Dec 2002
Location: dry ol Melbourne Australia
Default Appropriate components: LM 3886/ TDA 7293/ +

I’m about to buy parts for my first two electronics projects -
Two P2P ‘gainclone’ amps, based on the LM 3886 & TDA 7293 datasheets

I’m going to prototype the two amps, with interchangeable power supplies, before replicating in a three-way part dipole active. (I know a guy doing the LM3875, and we’re going to compare, but I don’t want to burden him with more newbie questions).

Some parts (eg feedback resistors) I have answers for or worked out.

But others, when I look in the array of catalogues of vendors (I found through searching for recommendations here), and read the odd electronics 101article, I have almost no idea of the difference *in appropriate application* for:
axial/
electrolytic/
bipolar/
nonpolar
polypropylene/
surface mount etc:

- So for the components below – which is best??

*Please suggest* the best type of components, and a lesser priority also brands, for these :

LM 3886 (Non-inverting, per the datasheet) resistors:
Inverting input resistance (Ri)
preventing current entering non-inverting input (Rb)
frequencies to short out R & pass signals to the load (Rl)

TDA 7293
R1 Input resistor
R2 & R3 Closed lop gain
R4 ST-by time constant
R5 Mute

C1 Input DC coupling
C2 Feedback DC coupling
C3 Mute time constant
C4 ST-by time constant
C5 Bootstrapping
C6-9 Supply voltage bypass


On another note:
I went to Digikey to look at Panasonic FC; usually I found minimum order quantities of 10.
Any suggested suppliers for good mid-range parts with no MOQ??


Your advice is appreciated!

Happy Christmas

Richard
  Reply With Quote
Old 23rd December 2003, 09:03 PM   #2
diyAudio Member
 
Join Date: Dec 2002
Location: dry ol Melbourne Australia
Default Come on

I don’t mind if you state the obvious – please help:

(Apart from eg Vishay/ Caddock from eg Percy Audio for feedback resistors) -

what sort (eg bipolar? axial? ) of resistors and capacitors have you guys used for the other parts, eg Feedback DC coupling - in any chip amps??

Thanks

Newbie
  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
tda 7293 and tda 7294 help sagarverma Chip Amps 85 22nd March 2013 08:15 PM
TDA 7293 parallel problem ! Cro maniac Chip Amps 5 4th May 2010 01:57 PM
Power Amp IC TDA 7293 headsavers Parts 2 22nd September 2006 01:39 AM
Impressions of Snubbered BrianGT 3886 vs Reg 3886 moving_electron Chip Amps 1 23rd March 2005 06:51 AM
PA Amp with TDA 7293...Questions... iCebReakEr409 Solid State 5 8th August 2002 08:59 PM


New To Site? Need Help?

All times are GMT. The time now is 12:16 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