DIY Audio Projects Forum
 NEW  Matt presents bias and operation data for the 6V6 tube in SE operation - 6V6 Single-Ended (SE) Ultra Linear (UL) Bias Optimization.

DIY Audio Projects Forum

Welcome to the DIY Audio Projects Message Forum. Use these forums to discuss Hi-Fi audio and to share your DIY Audio Projects. Registration is free and required to post messages and view the file attachments. Registration will only take a minute and registered users do not see any advertisements. After you have completed the online registration process, check your email (including spam/junk folder) for the verification email to activate your account. New members are under moderation - so your posts will not be visible until approved by a moderator. See the Read Me 1st, Forum RULES and Forum FAQ to get started on the forum.

It is currently 21 May 2018, 15:41

All times are UTC - 6 hours [ DST ]




Post new topic Reply to topic  [ 1640 posts ]  Go to page Previous  1 ... 10, 11, 12, 13, 14, 15, 16 ... 164  Next
Author Message
PostPosted: 10 Jun 2010, 05:22 
Offline

Joined: 20 Jan 2010, 04:18
Posts: 3
if i use 12ax7 replace 12au7.
the value of component will change.
please tell me about value of component to use for 12ax7
katip


Top
 Profile  
 
PostPosted: 10 Jun 2010, 07:48 
Offline
Project Author
User avatar

Joined: 03 Aug 2008, 20:22
Posts: 386
Location: Denver, Colorado
katip wrote:
if i use 12ax7 replace 12au7.
the value of component will change.
please tell me about value of component to use for 12ax7

Katip,
To use a 12AX7, P1 must be in the 50K ohm range. I do not have the exact value. Remember that the mu for a 12AU7 is 17 and the mu for the 12AX7 is 100. If you are using a line level input, you may experience a lot of distortion. The only other tube that I have success with is the 12AT7, as a 10k pot will allow you to adjust for half the B+.


Top
 Profile  
 
PostPosted: 10 Jun 2010, 12:41 
Offline

Joined: 20 Jan 2010, 04:18
Posts: 3
thank roggom :)


Top
 Profile  
 
PostPosted: 14 Jun 2010, 01:53 
Offline

Joined: 15 May 2010, 10:01
Posts: 6
Hi y'all

We finally got around to putting the amp together and I must say it rocks! After listening to it at work for about a day the sound quality is really nice. I just want to thank the designer dor designing such a great amp and sharing it here on the web.

Cheers
/Jonas


Top
 Profile  
 
PostPosted: 14 Jun 2010, 22:54 
Offline
Project Author
User avatar

Joined: 03 Aug 2008, 20:22
Posts: 386
Location: Denver, Colorado
Thank you for the kind words, I am glad you like it and I am happy that I could help out.

Rogers


Top
 Profile  
 
PostPosted: 18 Jun 2010, 15:16 
Offline

Joined: 18 Jun 2010, 14:55
Posts: 4
Location: Spain
Hello, apologies for my poor English, I just mount the amplifier, and it works perfectly :headphones:

Image

, thanks for the schematics and the article, I have also put an LED below the valve. :D 8-)

Image

WAAAAAAAAARRMMMMMMMMM!!!!!!!!!!!!!!!!!!!!!!!!!!

I'm just a fan of electronics, has any idea for the power supply?
All sources I've tested, producing AC noise :mad:
How I can filter properly?

Thankyou very much!

greetings!


Top
 Profile  
 
PostPosted: 18 Jun 2010, 23:38 
Offline
Project Author
User avatar

Joined: 03 Aug 2008, 20:22
Posts: 386
Location: Denver, Colorado
Jaume,

Looks great,

As many have found, it may take a while to find the perfect wal wart. I use a Canon AD360U, it is from a compact portable printer and is 13v 1.8A and works very well. I am not sure where you are located, but thrift stores and second hand shops are a great place to find power supplies.

Thanks

Rogers


Top
 Profile  
 
PostPosted: 19 Jun 2010, 07:03 
Offline

Joined: 18 Jun 2010, 14:55
Posts: 4
Location: Spain
thanks Rogers, I'm from Spain, I'll try some power supplies, i find some on ebay and Cash Converters ...

Furthermore
pc power supply, it seemed a good candidate, but the two I have, add fan noise,
are powerfull and stable, but the fan noise is unbearable. :shock: :mad:

I will continue testing...

Regards!


Top
 Profile  
 
PostPosted: 19 Jun 2010, 09:49 
Offline
Project Author
User avatar

Joined: 03 Aug 2008, 20:22
Posts: 386
Location: Denver, Colorado
Just a thought, since you are experimenting. Since you are only loading the pc power supply about 300mA, try disconnecting the fan. Check if the heat stays within a reasonable temp. If anything you can run the pc supply without the top for passive airflow.

Rogers


Top
 Profile  
 
PostPosted: 19 Jun 2010, 19:53 
Offline
Editor
User avatar

Joined: 28 May 2008, 21:53
Posts: 4548
Location: Winnipeg, CANADA
Nice work jaume.

If you have a 15VDC (or greater) supply, you can run it through a LM317 voltage regulator to make a 12V regulated supply which will be very clean. All the info you need is on that page, but if you have questions or need help, feel free to ask.

Welcome to the forum.
Cheers

_________________
[ DIY Mains AC Power Cable Cord ] - [ Gobo LM1875 Amp Kit ] - [ Tang Band D4-1 Horn Speaker Kit ] - [ Monoblock Push-Pull KT88 Tube Amp Kit ]


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 1640 posts ]  Go to page Previous  1 ... 10, 11, 12, 13, 14, 15, 16 ... 164  Next

All times are UTC - 6 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 7 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
DIY Tube Projects :: DIY Tube Amp Kits :: DIY Speaker Projects :: DIY Solid State Projects :: DIY IC / Op-amp Projects :: DIY Phono Projects :: DIY Cable Projects :: Hi-Fi Audio Schematics
© diyAudioProjects.com - Terms of Service - Privacy Policy