Anybody have scan of AN-483B (Motorola)? - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 13th April 2007, 03:55 AM   #1
diyAudio Member
 
Join Date: Mar 2007
Location: Canandaigua, NY USA
Default Anybody have scan of AN-483B (Motorola)?

This was the old Motolora app note about medium power audio amps using darlington devices. I had it, can't find it anymore, can't locate it on the 'net, and it's driving me crazy! Happy to trade for a scan of some other useful thing- old Dynaco catalog, Onkyo T-15 tuner service manual, SWTP Tiger amp docs, or whatever else might be useful from my library of obsolete technology
  Reply With Quote
Old 13th April 2007, 10:25 AM   #2
diyAudio Member
 
sixtek's Avatar
 
Join Date: Jan 2007
Hi,

I've found AN485-D, "High power audio amplifiers with short circuit protection", from 1985 by Motorola.
35>100W amplifier design with CFP output.

Maybe you tought of 485D application note instead of "483B"?

http://sixtek.uw.hu/an485d.pdf
  Reply With Quote
Old 13th April 2007, 12:08 PM   #3
diyAudio Member
 
Join Date: Mar 2007
Location: Canandaigua, NY USA
I found that one also, but there are several audio related app notes that disappeared from Motorolas listing quite early. Possibly these "special" notes were only released to members of the secret audio society. You are a member, aren't you? Pretty sure my number is correct, as I built several amplifiers based on their circuits. I'm going to try the local antique wireless people, as they have a large collection of old data. I notice that nobody seems interested in darlington outputs these days, but I recently tested the amp I built from the app note, and was surprised at how well it did. I also used to have an Integral Systems 200 amp. It did 100W/ch using a single pair of darl outputs on huge spider heat sinks. Seemed risky to me, but it worked well and was very inexpensive. Thanks.
  Reply With Quote
Old 13th April 2007, 01:11 PM   #4
diyAudio Member
 
Juergen Knoop's Avatar
 
Join Date: Jan 2007
Blog Entries: 3
Quote:
I notice that nobody seems interested in darlington outputs these days
tsss, the black devil by Georg Schwarz/Gerhard Haas is still on my wishlist.
It features a single ended input stage, one transistor for voltage gain and a pushpull darlington output stage.
The authors promise "tube sound" with second harmonic distortion only.
And of course it has electrolytics at input and output!
I have still two pairs of BDX64/67 and I will try them in this circuit.
  Reply With Quote
Old 13th April 2007, 03:36 PM   #5
fotios is online now fotios  Greece
diyAudio Member
 
fotios's Avatar
 
Join Date: Feb 2007
Location: Δραμα - North Greece
Default Re: Anybody have scan of AN-483B (Motorola)?

Quote:
Originally posted by Conrad Hoffman
This was the old Motolora app note about medium power audio amps using darlington devices. I had it, can't find it anymore, can't locate it on the 'net, and it's driving me crazy! Happy to trade for a scan of some other useful thing- old Dynaco catalog, Onkyo T-15 tuner service manual, SWTP Tiger amp docs, or whatever else might be useful from my library of obsolete technology
Do you mean this?
Attached Images
File Type: jpg an483-b.jpg (80.2 KB, 838 views)
  Reply With Quote
Old 13th April 2007, 10:46 PM   #6
diyAudio Member
 
Join Date: Mar 2007
Location: Canandaigua, NY USA
Yes indeed, that would be the one! What sorts of things are you interested in that I might be able to scan in return?

Regards,
Conrad
  Reply With Quote
Old 14th April 2007, 01:33 AM   #7
mikeks is offline mikeks  United Kingdom
Account Disabled
 
Join Date: Jun 2004
Location: Animal farm
Original app_note available in .pdf. Send me mail.
  Reply With Quote
Old 14th April 2007, 12:21 PM   #8
fotios is online now fotios  Greece
diyAudio Member
 
fotios's Avatar
 
Join Date: Feb 2007
Location: Δραμα - North Greece
Quote:
Originally posted by Conrad Hoffman
Yes indeed, that would be the one! What sorts of things are you interested in that I might be able to scan in return?

Regards,
Conrad
I hope Mikeks that he solves your request. If it is not so, please inform me to send you the document in photographs because i have not scanner.
Fotios
  Reply With Quote
Old 26th January 2009, 01:34 AM   #9
diyAudio Member
 
Join Date: Jan 2009
Hi,

This is my first post here.

I’ve located this thread after searching for the Motorola application note AN-843A for Darlington transistors.

I noticed one of the members in this thread had a copy, in PDF form, but before I contacting the member directly, I felt it only right to resurrect the thread before doing so.

The reason for trying to locate the AN-843 application note is because I need to gather some background info on the HH TPA25-D power amplifier, which by my deduction uses Motorola Darlington transistors.

I’ve seen a summary of the application note in a 1971 copy of Wireless World, but I’d like to locate the original Motorola version.

A circuit for the HH TPA25-D would be nice at some point, but that’s for a separate post!

Regards.
Terry.
  Reply With Quote
Old 26th January 2009, 05:10 AM   #10
lineup is offline lineup  Sweden
diyAudio Member
 
lineup's Avatar
 
Join Date: Dec 2005
Location: the north
En esta práctica se analizará la etapa de amplificación de audio de la figura 4 del boletín
técnico de Motorola (nota de aplicación AN-483B).

http://www.ing.unlp.edu.ar/electrote...celec/lab5.pdf
__________________
lineup
  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
motorola dcp501 thuthriller Class D 319 17th April 2013 07:36 PM
Motorola OPT alejo Tubes / Valves 0 4th April 2008 07:50 PM
The ID CD1.E... A Motorola right? Tuukka Car Audio 0 17th February 2007 12:52 AM
WTB: Motorola DCP-501 reciever DcibeL Swap Meet 3 11th October 2006 05:27 PM
Motorola Fet AR1 Parts 10 10th June 2005 04:49 PM


New To Site? Need Help?

All times are GMT. The time now is 04:39 PM.


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