Go Back   Home > Forums > >

Pass Labs This forum is dedicated to Pass Labs discussion.

AB100 Class AB Power Amplifier
AB100 Class AB Power Amplifier
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
Old 22nd October 2020, 10:47 PM   #991
DaveFred is online now DaveFred  Canada
diyAudio Member
 
Join Date: Jan 2018
Location: London, Ontario, Canada
Quote:
Originally Posted by Dennis Hui View Post
You need not follow exact how the Panache was built. For example, it appears to
use a transformers with two sets of centre-tapped secondaries and you'll likely
not find something like that readily available.

You'll may find it to use what you like which fits on the main PCB and feed that from
another power supply board.
Readily available no, but not impossible to get either,

----
Dear David.

Here's an updated export offer:

Audio grade transformers:
TS 600VA PRI: 2x115V SEC: 4x 35V (4,28A) - cost: 92,10 EUR/pc (0% VAT export price).

Our offer is valid for the 30 days.


In audio grade, noiseless transformer price You'll get transformer winded with with the largest possible inductance.
Core will be measured and selected, nominal induction will be lowered for the leakage flux minimalization
For a best noise reduction core and all the windings are impregnated.
Transformer will also has electric and electromagnetic shields and epoxy filled interior.
----

I ordered one last week

Looks like I will be adding additional capacitance, just not 100% sure how I will be doing that yet.

David.
  Reply With Quote
Old 22nd October 2020, 11:05 PM   #992
Dennis Hui is offline Dennis Hui  Canada
Hoopy Frood
diyAudio Member
 
Join Date: Aug 2002
Location: Toronto, Canada
AB100 Class AB Power Amplifier
Toroidys are excellent; I think you'll like them.

How much was shipping?
__________________
We are fearless amplifier builders. A little heat doesn't scare us at all.
- NP 2002
  Reply With Quote
Old 22nd October 2020, 11:32 PM   #993
DaveFred is online now DaveFred  Canada
diyAudio Member
 
Join Date: Jan 2018
Location: London, Ontario, Canada
Quote:
Originally Posted by Dennis Hui View Post
Toroidys are excellent; I think you'll like them.

How much was shipping?
>>>Shipping cost to Canada - 52,00 EUR.

The total wasn't really too much different than buying two 300VA units domestically.

Plus, it was what I wanted.
  Reply With Quote
Old 23rd October 2020, 12:29 AM   #994
Dennis Hui is offline Dennis Hui  Canada
Hoopy Frood
diyAudio Member
 
Join Date: Aug 2002
Location: Toronto, Canada
AB100 Class AB Power Amplifier
Not that bad. Thanks!
__________________
We are fearless amplifier builders. A little heat doesn't scare us at all.
- NP 2002
  Reply With Quote
Old 23rd October 2020, 05:00 AM   #995
prasi is offline prasi  India
ANALOG DESIGN
diyAudio Member
 
prasi's Avatar
 
Join Date: Jan 2014
Location: Pune, India
AB100 Class AB Power Amplifier
Quote:
Originally Posted by DaveFred View Post
Looks like I will be adding additional capacitance, just not 100% sure how I will be doing that yet.

David.
How about something like this?
LT4320 based active rectifier
Its compact CRC that can take up either dual secondary or CT transformer. Instead of rectifier, you can also fit my SMD LT4320 rectificer in the same place.

PCBway order link is in this post LT4320 based active rectifier
__________________
My revamped site https://sites.google.com/site/analogdesign1234/

Last edited by prasi; 23rd October 2020 at 05:08 AM.
  Reply With Quote
Old 24th October 2020, 05:33 AM   #996
DaveFred is online now DaveFred  Canada
diyAudio Member
 
Join Date: Jan 2018
Location: London, Ontario, Canada
Quote:
Originally Posted by prasi View Post
How about something like this?
LT4320 based active rectifier
Its compact CRC that can take up either dual secondary or CT transformer. Instead of rectifier, you can also fit my SMD LT4320 rectificer in the same place.

PCBway order link is in this post LT4320 based active rectifier
These two files for the PS and active rectifier?

COMPT-CRC-95X100-CT_2020-06-07.zip

IDEAL BRIDGE-R3_TO-220 mosfets_2019-04-24.zip

And I don't need to bother with snubbers?
  Reply With Quote
Old 24th October 2020, 07:25 AM   #997
prasi is offline prasi  India
ANALOG DESIGN
diyAudio Member
 
prasi's Avatar
 
Join Date: Jan 2014
Location: Pune, India
AB100 Class AB Power Amplifier
pl read the thread, i am selling lt4320 in various options there.
if you want to go with conventional SIP rectifier, this LT4320 based active rectifier can be used as stand alone OR along with an option fit my lt4320 smd rectifier instead of SIP rectifier.

Documentation and schematic of the compact crc psu linked above is quite comprehensive and should make things pretty clear.
__________________
My revamped site https://sites.google.com/site/analogdesign1234/
  Reply With Quote
Old 24th October 2020, 08:23 PM   #998
DaveFred is online now DaveFred  Canada
diyAudio Member
 
Join Date: Jan 2018
Location: London, Ontario, Canada
Are there any substantive differences between these various TIP142's?

tip142.jpg

Or is a TIP142 a TIP142?

There is the obvious differences of mounting hole placement, one is max 80v where the others are max 100v, one is max 15 amp where the others are max 10 amp and overall length.

I am leaning towards the STMicroelectronics TIP142T for the higher amperage and what look like longer legs which would allow more standoff from the heat sink.

(I did try Googling "TIP142 verations", "TIP142 differences", "best TIP142", etc., to no avail)

Last edited by DaveFred; 24th October 2020 at 08:40 PM.
  Reply With Quote
Old 24th October 2020, 08:43 PM   #999
Dennis Hui is offline Dennis Hui  Canada
Hoopy Frood
diyAudio Member
 
Join Date: Aug 2002
Location: Toronto, Canada
AB100 Class AB Power Amplifier
You want the TO247 part for the pcb you have. Also, he last one in your list is
the TIP141G, which is not the part you want.

Of the two remaining, I don't see much to differentiate them. Note
the ST TIP147 TO247 part is current out of stock at mouser while the OnSemi
one is available, so that might influence your decision.
__________________
We are fearless amplifier builders. A little heat doesn't scare us at all.
- NP 2002
  Reply With Quote
Old 25th October 2020, 03:51 AM   #1000
DaveFred is online now DaveFred  Canada
diyAudio Member
 
Join Date: Jan 2018
Location: London, Ontario, Canada
Hello,

I am completely unqualified to come up with a BOM for the Prasi Nelson Pass AB100 circuit board, but if anyone wants to take a look, I have attached a ZIP of a preliminary stab at it.

Every part has a link to Mouser so it is easy to see what each is.

There is some duplication with the input cap being several possible choices.

I would be interested in any feedback anyone would have to offer!

Prelim DaveFred Prasi NP AB100 BOMS.zip

Thank you,

David.
  Reply With Quote

Reply


AB100 Class AB Power AmplifierHide this!Advertise here!
Thread Tools

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
"The Wire AMP" Class A/AB Power Amplifier based on the LME49830 with Lateral Mosfets opc Solid State 2634 3rd March 2020 01:44 AM
Contest: Linear Power Amp in a mint tin (class Aa, class AB, or class B) danielwritesbac Chip Amps 206 19th January 2013 09:52 PM
It helps to select best class power amplifier (AB- 40-50 watts) lopezm0 Solid State 59 16th December 2012 05:13 PM
DIY Low Power Class A (or AB) amplifier suggestions gareth Solid State 2 16th June 2009 03:46 PM
A good Brazilian Amplifier, class A switching to AB in hi power destroyer X Solid State 65 24th March 2005 09:12 PM


New To Site? Need Help?

All times are GMT. The time now is 11:41 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio
Wiki