SWR working mans 4004 Bass Head

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Jump to Latest
D

drummer1120

Member
Joined 2013
I did a replaced all 4 2SC3264 transisters hooked up to lihtbulb to test to make sure ok. worked for about 10min with sound oing through it.
Took out lightbulb and instant 1 of the 2sc3264 blew with r22 blew also.
could be coincedence nd got a bad part.
would like some other opinions.
thanks so much
here are schem. Q10 blew
 

Attachments

  • Workingman's 4004 (Complete).pdf
    580.5 KB · Views: 60
  • swr paint.png
    swr paint.png
    290 KB · Views: 77
  • board pic.jpg
    board pic.jpg
    101.5 KB · Views: 74
  • thumbnail.jpg
    thumbnail.jpg
    112.6 KB · Views: 83
R

RJM1

Member
Joined 2010
From the picture you might have removed some of the feed through's in the board when you removed the transistors. Make sure that there is solder on both sides of the board when you replace them again. (solder the topside if it is not there after you solder the bottom).
 
Last edited:
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Top Bottom