Author Topic: VALVE 6N3 PRE AND TDA7294 POWER AMP KIT  (Read 1212 times)

Offline Rhino

VALVE 6N3 PRE AND TDA7294 POWER AMP KIT
« on: March 09, 2018, 08:53:18 PM »
Just received my kit today and hope to start with assembly soon.
Here are a pic on how it looks before I start with assembly.

« Last Edit: March 09, 2018, 08:58:41 PM by Rhino »
Polk Audio Tsi500 - Fronts, Tsi200 - Bookshelf, Tsi100 - Front Height,  Cs10 - Centre, Integra DTR 50.5 AV Receiver,Sony BDP-S370 Blu-Ray, LG 3D Blu-Ray, Energy Veritas 10" Sub, Clavel 3 Way speaker

Offline HBAutomation

Re: VALVE 6N3 PRE AND TDA7294 POWER AMP KIT
« Reply #1 on: March 09, 2018, 10:20:50 PM »
Picks only available on desktop!  :sd:
When You Come to a Fork in the Road, Take It!            [Yogi Berra]

Offline vinyljan

Re: VALVE 6N3 PRE AND TDA7294 POWER AMP KIT
« Reply #2 on: March 10, 2018, 07:14:33 AM »
Postimage :thinking:


What is B+ on the 6N3?
In a maximum bank turn in a normal category airplane, like a typical Cessna, everything is fine until you turn across your own wake

Offline Curlycat

Re: VALVE 6N3 PRE AND TDA7294 POWER AMP KIT
« Reply #3 on: March 10, 2018, 07:56:52 AM »
O excellent! Subbed  :thumbs:
Lots of build pictures please.
What are you going to do for an enclosure?

Offline GECO

Re: VALVE 6N3 PRE AND TDA7294 POWER AMP KIT
« Reply #4 on: March 10, 2018, 10:41:35 AM »
Postimage :thinking:


What is B+ on the 6N3?
the sum of the two rail voltages for the tda

Sent from my SM-G930F using Tapatalk


Offline Rhino

Re: VALVE 6N3 PRE AND TDA7294 POWER AMP KIT
« Reply #5 on: March 10, 2018, 05:13:01 PM »
O excellent! Subbed  :thumbs:
Lots of build pictures please.
What are you going to do for an enclosure?

Nothing fancy at all, going to do something similar as what Geco has done with his.
I like the naked look.

But time will tell as I build it.
Polk Audio Tsi500 - Fronts, Tsi200 - Bookshelf, Tsi100 - Front Height,  Cs10 - Centre, Integra DTR 50.5 AV Receiver,Sony BDP-S370 Blu-Ray, LG 3D Blu-Ray, Energy Veritas 10" Sub, Clavel 3 Way speaker

Offline Rhino

Re: VALVE 6N3 PRE AND TDA7294 POWER AMP KIT
« Reply #6 on: March 10, 2018, 10:44:18 PM »
Here is a clip of one working:
https://www.youtube.com/watch?v=iNdmTRfd5J0

It seems I have some studying to do when it comes to reading Resistor values etc.
The rest of the components are much easier to read what the values are and where it needs to go.
Polk Audio Tsi500 - Fronts, Tsi200 - Bookshelf, Tsi100 - Front Height,  Cs10 - Centre, Integra DTR 50.5 AV Receiver,Sony BDP-S370 Blu-Ray, LG 3D Blu-Ray, Energy Veritas 10" Sub, Clavel 3 Way speaker

Offline GECO

Re: VALVE 6N3 PRE AND TDA7294 POWER AMP KIT
« Reply #7 on: March 11, 2018, 06:13:15 AM »
dont even bother reading them. you will make a mistake. get n multumeter and measure them

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Offline vinyljan

Re: VALVE 6N3 PRE AND TDA7294 POWER AMP KIT
« Reply #8 on: March 11, 2018, 06:37:13 AM »
Agree, coloured bands only indicate which to measure first :giggle:
In a maximum bank turn in a normal category airplane, like a typical Cessna, everything is fine until you turn across your own wake

Offline Rhino

Re: VALVE 6N3 PRE AND TDA7294 POWER AMP KIT
« Reply #9 on: March 11, 2018, 05:29:29 PM »
Assembly started with the resistors first. There are few not soldered due to a change (upgrade) being made.






So far so good.
Tested the values with a Multimeter as well as checked the colours as well.
Polk Audio Tsi500 - Fronts, Tsi200 - Bookshelf, Tsi100 - Front Height,  Cs10 - Centre, Integra DTR 50.5 AV Receiver,Sony BDP-S370 Blu-Ray, LG 3D Blu-Ray, Energy Veritas 10" Sub, Clavel 3 Way speaker

Offline Curlycat

Re: VALVE 6N3 PRE AND TDA7294 POWER AMP KIT
« Reply #10 on: March 11, 2018, 06:20:22 PM »
Looks like you are having fun and a great project.  :thumbs:
Keep those pictures coming please.

Offline Rhino

Re: VALVE 6N3 PRE AND TDA7294 POWER AMP KIT
« Reply #11 on: March 13, 2018, 08:47:47 PM »
I have received 5x 220uf 35v and not 3x 220uf 16v.
2 of them are correct.
Polk Audio Tsi500 - Fronts, Tsi200 - Bookshelf, Tsi100 - Front Height,  Cs10 - Centre, Integra DTR 50.5 AV Receiver,Sony BDP-S370 Blu-Ray, LG 3D Blu-Ray, Energy Veritas 10" Sub, Clavel 3 Way speaker

Offline Curlycat

Re: VALVE 6N3 PRE AND TDA7294 POWER AMP KIT
« Reply #12 on: March 13, 2018, 08:51:37 PM »
You can use the 35V as appose to the 16V.
Same capacitance, but just capable of taking a higher voltage supply.

Offline Rhino

Re: VALVE 6N3 PRE AND TDA7294 POWER AMP KIT
« Reply #13 on: March 13, 2018, 09:38:46 PM »
Thanks

Progress so far:


Waiting for the transformer to be made and delivered.
Hope to visit Mantech on saturday morning.
Polk Audio Tsi500 - Fronts, Tsi200 - Bookshelf, Tsi100 - Front Height,  Cs10 - Centre, Integra DTR 50.5 AV Receiver,Sony BDP-S370 Blu-Ray, LG 3D Blu-Ray, Energy Veritas 10" Sub, Clavel 3 Way speaker

Offline Rhino

Re: VALVE 6N3 PRE AND TDA7294 POWER AMP KIT
« Reply #14 on: March 16, 2018, 07:32:35 PM »
Went shopping at Mantech today.
Got a few goodies.






I hope my heatsink is efficient for this amp?
Polk Audio Tsi500 - Fronts, Tsi200 - Bookshelf, Tsi100 - Front Height,  Cs10 - Centre, Integra DTR 50.5 AV Receiver,Sony BDP-S370 Blu-Ray, LG 3D Blu-Ray, Energy Veritas 10" Sub, Clavel 3 Way speaker