S steel New member Feb 25, 2011 #1 All assembly completed Voltage check: 1. 12.6 2. 175 4. 175 5. 15.2 On A and B PCB, The led is dark. How to check? Sorry, I found my mistake...R1 is 237R I put 220K
All assembly completed Voltage check: 1. 12.6 2. 175 4. 175 5. 15.2 On A and B PCB, The led is dark. How to check? Sorry, I found my mistake...R1 is 237R I put 220K
S steel New member Feb 25, 2011 #2 something wrong? 5. 158V 9. 158V I am worried about some Transistor maybe burn? But change a new 12AU7, all Voltage check are right. AC in : 113V Heater voltage only AC 5.6V, is OK? Sorry for my poor english.
something wrong? 5. 158V 9. 158V I am worried about some Transistor maybe burn? But change a new 12AU7, all Voltage check are right. AC in : 113V Heater voltage only AC 5.6V, is OK? Sorry for my poor english.
S steel New member Feb 25, 2011 #3 On A and B PCB, The led is dark than others still. New Check.... 1. 74 2. 167 3. 0 4. 166 5. 69 6. 0-60 mV (Floating) 7. 101 8. 0 9. 97 10. 0-60 mV (Floating) 11. 0 12. 0 13. 165 14. 0 15. 183 21. 201 A1. 69 A2. 0 A3. 1.53 A4. 0 A5. 0 A6. can't touch by lead A7. 0 A8. 1.56 A9. 0 B1. 73 B2. 166 B3. 102 B4. 69 B5. 166 B6. 98 B7. 0 B8. 0
On A and B PCB, The led is dark than others still. New Check.... 1. 74 2. 167 3. 0 4. 166 5. 69 6. 0-60 mV (Floating) 7. 101 8. 0 9. 97 10. 0-60 mV (Floating) 11. 0 12. 0 13. 165 14. 0 15. 183 21. 201 A1. 69 A2. 0 A3. 1.53 A4. 0 A5. 0 A6. can't touch by lead A7. 0 A8. 1.56 A9. 0 B1. 73 B2. 166 B3. 102 B4. 69 B5. 166 B6. 98 B7. 0 B8. 0
S steel New member Feb 25, 2011 #4 A damaged 12AU7 can cause abnormal voltage? Finished, but not try to add headphone yet. Two switch, Turn on heater first, Then high Voltage.
A damaged 12AU7 can cause abnormal voltage? Finished, but not try to add headphone yet. Two switch, Turn on heater first, Then high Voltage.
J JC New member Feb 26, 2011 #5 I think by luck of the draw, he keeps getting knocked off the front page and perhaps escaping notice... http://www.bottlehead.com/smf/index.php/topic,1578.0.html I don't know the circuit even a little bit.
I think by luck of the draw, he keeps getting knocked off the front page and perhaps escaping notice... http://www.bottlehead.com/smf/index.php/topic,1578.0.html I don't know the circuit even a little bit.