A audiofan Member Joined 2003 2008-02-25 4:56 pm #1 2008-02-25 4:56 pm #1 I would like to have a simple tube checker for : 12AX7 12AT7 &12AU7 ( guitar amp stuff ) So I desing the attached circuit 170 V 10 mA load line for 12AT7 & 12AU7 170V 2mA load line for 12AX7 0-2V bias Should I build it as-is ? Attachments tubecheck.gif 7.7 KB · Views: 117 A alejo Member Joined 2004 2008-02-25 6:04 pm #2 2008-02-25 6:04 pm #2 please use power transformer. !!! Status Not open for further replies.
I would like to have a simple tube checker for : 12AX7 12AT7 &12AU7 ( guitar amp stuff ) So I desing the attached circuit 170 V 10 mA load line for 12AT7 & 12AU7 170V 2mA load line for 12AX7 0-2V bias Should I build it as-is ?
A alejo Member Joined 2004 2008-02-25 6:04 pm #2 2008-02-25 6:04 pm #2 please use power transformer. !!!
