amphead
Headphoneus Supremus
- Joined
- May 5, 2007
- Posts
- 2,810
- Likes
- 11
You could try reflowing solder at all of your critical points, being cautious not to get solder bridges to the ground plane from the top. Good Luck!
Originally Posted by Mr.Unknown /img/forum/go_quote.gif people, i realize that 70% of Millett max í of tangentsoft,. Psu is step, |
Buffer is of M^3, only input stage is new. |
I can't find millett tube in my country(12AE6- 12FM6...) so can i design input stage with another tube such as 12AU7 or 12AX7 ,..... Please help me, thank. |
Originally Posted by soloz2 /img/forum/go_quote.gif that's just RLED. see if the power LED (and tube LEDs) light up if you flip on the power. It likely needs to be replaced. |
Originally Posted by tomb /img/forum/go_quote.gif Soloz2 is correct, but that resistor looks woefully undersized. The Panel LED shouldn't be pulling that much amperage, but if it was sized with the rest, it would be 10-15ma. At least a 1/2W resistor is needed. Those are usually twice the physical size of the one in the photo. EDIT: The tube LED resistors look adequate size, but someone may have assumed that the panel LED wouldn't pull as much and sized it for the same ohms, but less power. If so, it would still pull the same milliamps and burn out. |
Originally Posted by nocturnalsheet /img/forum/go_quote.gif thanks for the fast replies. tried powering on and both the power led and tube led lights up. |
is there any danger to my millet if i continue to use it with the burned resistor? |
what is the part that i should get to replace it? |
thanks for the help. |
Originally Posted by tomb /img/forum/go_quote.gif That may be true, but it's probably hanging by a thread. You can count on it failing soon, most likely. No. Soloz2 gave you a good link. One other thing - I don't like seeing the center support not used. That's the open hole in the middle. It should be attached to the bottom of the case with a standoff such that the board doesn't flex at all when plugging and unplugging tubes. I guess if you never do any tube-rolling, it'll be fine, but otherwise - something else to work on to keep another failure from occurring that would be much more serious. Another option is to simply install a screw long enough to touch the bottom of the case. IOW, you'd use a nut to fasten it to the board, but if it was long enough to touch bottom, then it would provide the needed support at least in one direction. |