Welcome, Guest. Please login or register.
Did you miss your activation email?
November 21, 2024, 09:40:59 PM
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
|-+  British Style
| |-+  18 Watt
| | |-+  Problem with a build...fixed and some photos		 « previous next »
Pages: [1] Go Down Print
Author Topic: Problem with a build...fixed and some photos  (Read 5212 times)
RichardG
Newbie
*
Offline Offline

Posts: 20


View Profile
« on: January 31, 2010, 07:50:07 AM »
I just built a ceriatone 18 watt TMB.

Plugged it in worked great. Cranked it up and the sound started dropping in and out, then it stopped, then a electronics burny smell. I figured out that the he1K5 5 W  Resistor that runs across the 32uF/32uF was burnt out.

I had another one the same so I soldered it in and the amp works again.

BUT..... It is showing the same symptoms as before.....If I crank up the sound cuts out, so I have turned it off so I do not cook that resistor again. Seems OK at low volumes but I do not want to push my luck by testing it for an extended period.

I did take it to a tech prior to turning it on just so he could check it over, so I am 99% sure it is wired fine.

Any suggestions would be appreciated.

Thank you.
« Last Edit: February 04, 2010, 11:13:45 PM by RichardG » Logged
cmoore
Sr. Member
****
Offline Offline

Gender: Male
Posts: 351


View Profile
« Reply #1 on: January 31, 2010, 09:24:08 AM »
Can you take some voltage readings with all the pots on Zero, the Trem turned off, and the power tubes out of the chassis? It could be a lot of things, including bad power tubes. You can put the power tubes back in and see if your volt readings change.
Do you have a light bulb limiter?
Logged
RichardG
Newbie
*
Offline Offline

Posts: 20


View Profile
« Reply #2 on: January 31, 2010, 10:02:22 AM »
Quote from: hired hand on January 31, 2010, 09:24:08 AM
Can you take some voltage readings with all the pots on Zero, the Trem turned off, and the power tubes out of the chassis? It could be a lot of things, including bad power tubes. You can put the power tubes back in and see if your volt readings change.
Do you have a light bulb limiter?

I can do that.

No I don't have a bulb limiter.... I probably should make one.

Thanks
Logged
RichardG
Newbie
*
Offline Offline

Posts: 20


View Profile
« Reply #3 on: February 04, 2010, 11:12:44 PM »
Fixed, bit thought I would post in case anyone is interested.

After much rooting about, it turned out to be a bad power tube.

I should have checked tubes first, but in my mind the problem was presenting like a bad solder in the power section or something like that.

here are some gut shots I took for Nik. Its not tidied up yet as I was waiting until I fixed the problem

http://picasaweb.google.com.au/cashmeuppawnbroker/GutShots#

and here are some progress photos I was doing as I went

http://picasaweb.google.com.au/cashmeuppawnbroker/Marshall18WattBuild#
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.