Go Back   Home > Forums > >

Chip Amps Amplifiers based on integrated circuits

Xmas Amp - Dibya's TDA7293 by Jhofland
Xmas Amp - Dibya's TDA7293 by Jhofland
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 11th October 2021, 09:55 PM   #771
DaveFred is offline DaveFred  Canada
diyAudio Member
 
Join Date: Jan 2018
Location: London, Ontario, Canada
Xmas Amp - Dibya's TDA7293 by Jhofland
These are the last pics, I swear...

Amp is done!

Some details of how I put it all together in the end,

Alps 10k volume pot was mounted at the rear of the amp near the inputs to make the signal path as short as possible and not cross too many wires.

I tried about 5 different signal wires and found most very difficult to work with.

The signal wire I settled on is Tensility International Corp pn#30-00346, Digikey has it.

The "standard" volume pot extension with bushing is kinda crappy, so I made my own with 6mm brass rod from Amazon along with a 6mm coupler and 6mm linear bearing from Aliexpress.

6mm Linear bearing from Aliexpress

6mm Coupler from Aliexpress

I wanted to have the switch at the front of the amp, but nice switches that are rated properly are hard to come by. I used Schurter Inc pn#1241.6821.1110000 which is rated for 12 amps at 250v.

To connect all the powers together I used Bud Industries pn#DMB-4770-CB breadboard which has holes big enough for the faston tabs to fit into. The faston tabs were jumped with a soldered large gauge solid core copper wire on the backside of the breadboard.

The power on lamp was an expensive 110v one, E-Switch pn#PVL14FWS16, but it was dumb dumb easy to install.

All bare stranded wires had a wire ferrule crimped over them before going into screw down blocks.

I think those are most of the little finishing details that I used for "assembling" the amp.

Thanks for everyone's help along the way!

Now for some critical listening,

David.
Attached Images
File Type: jpg amp done 1.jpg (99.6 KB, 149 views)
File Type: jpg amp done 2.jpg (124.1 KB, 151 views)
File Type: jpg amp done 3.jpg (136.1 KB, 145 views)
File Type: jpg amp done 4.jpg (126.2 KB, 145 views)
File Type: jpg amp done 5.jpg (95.5 KB, 141 views)
File Type: jpg amp done 6.jpg (145.2 KB, 55 views)
File Type: jpg amp done 7.jpg (128.3 KB, 64 views)
File Type: jpg amp done 8.jpg (136.9 KB, 60 views)
  Reply With Quote
Old 11th October 2021, 11:30 PM   #772
Mark Tillotson is offline Mark Tillotson
diyAudio Member
 
Join Date: May 2018
Location: Cambridge UK
I'm confused - you use a linear bearing with rotary motion?
  Reply With Quote
Old 12th October 2021, 01:09 AM   #773
DaveFred is offline DaveFred  Canada
diyAudio Member
 
Join Date: Jan 2018
Location: London, Ontario, Canada
Xmas Amp - Dibya's TDA7293 by Jhofland
Quote:
Originally Posted by Mark Tillotson View Post
I'm confused - you use a linear bearing with rotary motion?
Yes, it's just balls, this one doesn't care if it rotates or slides.
  Reply With Quote
Old 12th October 2021, 04:55 AM   #774
Dibya is offline Dibya
diyAudio Member
 
Join Date: Apr 2018
Location: Inside your preamplifier
@ DaveFred that's looking really nice.
  Reply With Quote
Old 12th October 2021, 08:17 PM   #775
xrk971 is offline xrk971  United States
Got Foam?
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Metro DC (Virginia)
Xmas Amp - Dibya's TDA7293 by Jhofland
Nice work!

That’s a whole lot of work to connect all those things in a 3D puzzle.

The one reason I like integrated IEC with fuse drawer, rocker switch, and EMI filter. It handles a lot of the grunt work for mains stuff.
__________________
XRKaudio Store // Manufacturer’s Forum
  Reply With Quote
Old 12th October 2021, 11:32 PM   #776
flamethrower1 is offline flamethrower1  United States
diyAudio Member
 
Join Date: Sep 2015
Location: Wisconsin
Xmas Amp - Dibya's TDA7293 by Jhofland
Nice build DaveFred
  Reply With Quote
Old 13th October 2021, 05:51 PM   #777
jimk04 is offline jimk04  United Kingdom
diyAudio Member
 
Join Date: Jul 2018
Location: North Notts
Been off ill this week so far and whilst it has stopped me from doing my usual manual job it has given me time to finish my Xmas amp. Well I say finish it I've pretty much done it all. Boards were populated before hand.

Took me a loooong time as usual. I always seem to have too small a chassis and so packaging and routing becomes tricky. I'm not totally happy with the layout and wire runs but it is what it is for now.
Running a 29v trafo through CRC giving 39vdc.
Using Mark Johnson low voltage soft start thing.
Using some Aliexpress protection board.
Fired up without flames! Offset is about 5mv. Everything seems stable albeit sat idling with no load or input. Only issue I see is the protexr board runs 5v relays and the AC input level is giving the 7805 a hard time. ....I have one I got for class d pbtl so it has 4 relays....un common L and R grounds....runs at 12v. Can I use that?

Anyway hopefully tomorrow i can plug it all in.

Thanks to everyone for the advice in this thread and again to Peter (turion) for the boards he sent me many moons ago before I learnt how to buy my own from JLCPCB!
Attached Images
File Type: jpg 20211013_182806.jpg (722.3 KB, 36 views)
File Type: jpg 20211013_182815.jpg (942.5 KB, 42 views)
File Type: jpg 20211013_182935.jpg (938.2 KB, 39 views)
File Type: jpg 20211013_182838.jpg (772.7 KB, 38 views)
File Type: jpg 20211013_182854.jpg (974.9 KB, 44 views)
__________________
Salas DCG3, Ian Canada streamer, JLE 3255, Miro AD1862 diy XRK Ref Monitors. Currently building Pass AB100, Wayne's BA18
  Reply With Quote
Old 13th October 2021, 08:43 PM   #778
xrk971 is offline xrk971  United States
Got Foam?
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Metro DC (Virginia)
Xmas Amp - Dibya's TDA7293 by Jhofland
Nice work, Jimk04! Love those thick silicone insulated wires.

You don’t need a PBTL protection board but it doesn’t hurt. It just means the speaker out -ve is isolated from ground.

A lot of people are putting both amps on one side of a chassis even though they have two heatsinks.
__________________
XRKaudio Store // Manufacturer’s Forum
  Reply With Quote
Old 13th October 2021, 08:46 PM   #779
jimk04 is offline jimk04  United Kingdom
diyAudio Member
 
Join Date: Jul 2018
Location: North Notts
Got the silicone wire nod from yourself a while back...RC car wires! Good shout.
I realise it is a waste of a sink but for these boards I preffered the signal input wiring to be short so it meant setting the boards out thus.
Hopefully will get to hear it tomorrow.


I've just started reading the Alpha Nirvana thread!��
__________________
Salas DCG3, Ian Canada streamer, JLE 3255, Miro AD1862 diy XRK Ref Monitors. Currently building Pass AB100, Wayne's BA18
  Reply With Quote
Old 14th October 2021, 12:27 AM   #780
xrk971 is offline xrk971  United States
Got Foam?
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Metro DC (Virginia)
Xmas Amp - Dibya's TDA7293 by Jhofland
The Xmas amp pairs really well with the 10F/RS225 Fast speaker that you have. You’ll like it a lot.
__________________
XRKaudio Store // Manufacturer’s Forum
  Reply With Quote

Reply


Xmas Amp - Dibya's TDA7293 by JhoflandHide 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
Some Class A pcbs for sale designed by xrk971/AKSA/JPS64/Jhofland... Kokanee Swap Meet 9 19th April 2020 06:00 AM
A moment's thanks for jhofland legendre The Lounge 1 5th April 2020 05:21 PM
Unshure of class, but its the ultimate xmas amp FE3T Class D 8 14th December 2008 04:34 AM
Xmas Babyboom Guss The Lounge 2 25th December 2003 10:06 PM


New To Site? Need Help?

All times are GMT. The time now is 03:37 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 13.64%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Copyright ©1999-2021 diyAudio
Wiki