Head-Fi.org › Forums › Misc.-Category Forums › DIY (Do-It-Yourself) Discussions › Starving Student PCB's
New Posts  All Forums:Forum Nav:

Starving Student PCB's - Page 18

post #256 of 266
If I wanted to use this amp with just a single mono input, and output to both left/right headphone (still mono signal since 1 input) could I basically just have the one input go into a mono potentiometer and the output for that would go into R14 and R15 and leave everything else the same? Im looking at this schematic posted a couple pages back that I assume is the same design as the PCB boards:
http://cdn.head-fi.org/9/90/90ff3244_SSMH-SCHEMATIC-12AU7.gif
I want to use this as a cheap little tube amplifier for coming line out of an electric guitar and to amplify the signal so it can be listened to on headphones nicely for nighttime playing.
post #257 of 266
Quote:
Originally Posted by EniGmA1987 View Post

If I wanted to use this amp with just a single mono input, and output to both left/right headphone (still mono signal since 1 input) could I basically just have the one input go into a mono potentiometer and the output for that would go into R14 and R15 and leave everything else the same? Im looking at this schematic posted a couple pages back that I assume is the same design as the PCB boards:
http://cdn.head-fi.org/9/90/90ff3244_SSMH-SCHEMATIC-12AU7.gif
I want to use this as a cheap little tube amplifier for coming line out of an electric guitar and to amplify the signal so it can be listened to on headphones nicely for nighttime playing.

I am not an expert, but I would populate only half of the board and use one tube and one MOSFET. No need to have both tubes and MOSFETs running to process the same signal. You would spend only half of the parts money. That of course unless you want to rebuilt it later for stereo use.

 

Even cheaper would be something like this: http://www.kitsrus.com/pdf/k87.pdf. I have built this amp into a small plastic enclosure and run my guitar thru that. It worked just fine with my 600 Ohm AKG cans. But that's a bit off topic.

post #258 of 266

Hello,

This is an old thread.. :bigsmile_face:

However, if there are 1 or 2 PCB available (12AU7 or 19J6 version), I would be happy !

 

Thanks in advance.

 

Benoit

(Brussels, Belgium)

post #259 of 266
Thread Starter 

I have plenty of the 12AU7 pcb's

 

cheers

FRED

post #260 of 266

Hello,

 

I also am interested in 2 or 3 pcb's for the 12au7 so I have send you a pm Fred_fred2004.

 

cheers!

post #261 of 266

What power adapter do you guys use with this pcb?

post #262 of 266
Thread Starter 

Use the Cisco 48V power supply just the same as the original design

 

cheers

FRED

post #263 of 266
Quote:
Originally Posted by Fred_fred2004 View Post

Use the Cisco 48V power supply just the same as the original design

cheers
FRED

Same here. I got mine off eBay, item 371015023668

Works perfectly. No noise at all.
post #264 of 266

I'd love to get one of these 12AU7 pcbs if you still have any left. I am going to PM you now Fred_fred2004.

 

Thanks in advance!

post #265 of 266
Thread Starter 

Plenty of boards left :-)

post #266 of 266

I would like to order one PCB.

 

You have a private message 

 

Regards,


Edited by Wisor - 5/22/15 at 2:51am
New Posts  All Forums:Forum Nav:
  Return Home
Head-Fi.org › Forums › Misc.-Category Forums › DIY (Do-It-Yourself) Discussions › Starving Student PCB's