Welcome, Guest. Please login or register.
Did you miss your activation email?
March 29, 2024, 09:52:24 AM
Home Help Search Login Register
News: Ceriatone Forums are up and running!!!
 
Guests please register
Note: If you want to help you can donate to keep the forums alive.



Do you want to advertise on this forum ? Send me a private message.



Amplified Parts
+  Ceriatone Forum
|-+  Muchless
| |-+  DC 30
| | |-+  Channel 1 Gain Issues
« previous next »
Pages: [1] Go Down Print
Author Topic: Channel 1 Gain Issues  (Read 3291 times)
breakthastatic
Newbie
*
Offline Offline

Posts: 3


View Profile
« on: May 03, 2009, 09:32:49 PM »

Hi All,

I am having problems with low gain on channel 1.  I understand that channel 1 should be slightly quieter than channel 2, but I'm talking way quieter.  Channel 1 isn't loud enough to play any type of club, or even a band practice.  I've checked the plate voltages for the tubes and everything is in 5% tolerance of spec.  I've checked the pots to make sure they are working properly.  Both the 1.5 K resistor and the 220 K resistor are within tolerance.  I've also replaced all the preamp tubes.  I can't think of anything else, short of changes to component values to increase gain.

Does anyone else have a severe gain difference between channels?  Anyone have suggestions on what to change or test?  The amp has a great sound, but at this volume is useless.  Any help is appreciated.  Thanks!
Logged
hywelg
Hero Member
*****
Offline Offline

Posts: 896


View Profile
« Reply #1 on: May 04, 2009, 08:32:49 PM »

My channels are fairly similar in volume. Did you build yours yourself or was it a complete amp from Nik? If it was from Nik email him and he'll talk you through the diagnosis. Check your FX loop wiring each channel has its own FX loop.

Is the volume the same for both inputs? Check your input jack wiring.

Logged
breakthastatic
Newbie
*
Offline Offline

Posts: 3


View Profile
« Reply #2 on: May 05, 2009, 03:44:24 PM »

well i was talking to nik, since all the voltages check out its probably not any of the resistors or caps.  most likely a wiring issue.  maybe a cold solder or a bad ground that's attenuating the signal.  i'm in the process of re-dressing the amp anyway, so any wiring issues should get fixed.  i built the amp 2 years ago and was new to the field.  i've since learned a lot about tubes and wiring, so i figured this amp needs to get updated.

i suspected the volume pots could be acting up, but they checked out.  i am replacing them anyway with PEC pots as part of the re-dress.  i'm currently desoldering the amp right now.  i'll keep you guys updated on what happens.  thanks.
Logged
Pages: [1] Go Up Print 
« previous next »
Jump to:  


Login with username, password and session length

Powered by MySQL Powered by PHP Powered by SMF 1.1.12 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!

CeriaTone Forum is not afiliated with Ceriatone Amplifications. The CeriaTone and name, logo and related trademarks and service marks, owned by CeriaTone. , are registered and/or used in the U.S. and many foreign countries. All other trademarks, service marks, and trade names referenced in this site are the property of their respective owners.