Hi guys,
I've got one of these chinese thingys:
http://hi-end.on9mart.com/products/amplifiers/integ_amp/AI-MA-MENG-EL34-6bkbk/TIA13-photo_04.JPG
Bought off a well known auction site...
It was working brilliantly... until i decided to fit magic eye vu meters to the sucker. I proceeded to burn out 2x resistors on the tube socket side of the board. Does anyone here have a picture of that side? I can find plenty of the underside of the board, just not the top.
How it blew: I hooked up the magic eye board as it should be (or how i thought it should be) and turned it on. no input connected & volume at minimum. after about... 6 seconds one resistor caught fire (yes. fire.) and the second followed shortly after. as a result i am unable to identify the values to replace them.
It turns out the magic eye tube socket was on the wrong side of the board - me= stupid for doing that. and a short circuit resulted. I have since removed the magic eye stuff so i can focus on getting the amp back to normal.
(i suppose this is what i get for assembling a kit without instructions) It would have been nice if the guy i got the kits off supplied me with them, but the damage is done. Now it's fixing time!
I'll see if i can rustle up a pic of the board soon
Thanks in advance...
I've got one of these chinese thingys:
http://hi-end.on9mart.com/products/amplifiers/integ_amp/AI-MA-MENG-EL34-6bkbk/TIA13-photo_04.JPG
Bought off a well known auction site...
It was working brilliantly... until i decided to fit magic eye vu meters to the sucker. I proceeded to burn out 2x resistors on the tube socket side of the board. Does anyone here have a picture of that side? I can find plenty of the underside of the board, just not the top.
How it blew: I hooked up the magic eye board as it should be (or how i thought it should be) and turned it on. no input connected & volume at minimum. after about... 6 seconds one resistor caught fire (yes. fire.) and the second followed shortly after. as a result i am unable to identify the values to replace them.
It turns out the magic eye tube socket was on the wrong side of the board - me= stupid for doing that. and a short circuit resulted. I have since removed the magic eye stuff so i can focus on getting the amp back to normal.
(i suppose this is what i get for assembling a kit without instructions) It would have been nice if the guy i got the kits off supplied me with them, but the damage is done. Now it's fixing time!
I'll see if i can rustle up a pic of the board soon
Thanks in advance...
Here's the board...
Not in it's original case. I butchered a bamboo cutting board & glued some hardwood to it.
The pics might not be too clear, but l/h channel went from pin 4 of the two el34s to a 220UF cap (big sucker)
the r/h did similar, but the cap is a 180.
Without the resistors it sounds like a boss DS1 distortion pedal maxed out. and really quiet. not exactly the sound i was after...
When i guestimated the values (1k for L/H & 4.7k for r/h - from what colours i could make out), it made an almighty squeal/bassy rumble that terrified the neighbours dogs
The other possibility is when i blew the resistors i may have damaged the tubes, but i'll start with replacing these 20c parts first.
Not in it's original case. I butchered a bamboo cutting board & glued some hardwood to it.
The pics might not be too clear, but l/h channel went from pin 4 of the two el34s to a 220UF cap (big sucker)
the r/h did similar, but the cap is a 180.
Without the resistors it sounds like a boss DS1 distortion pedal maxed out. and really quiet. not exactly the sound i was after...
When i guestimated the values (1k for L/H & 4.7k for r/h - from what colours i could make out), it made an almighty squeal/bassy rumble that terrified the neighbours dogs
The other possibility is when i blew the resistors i may have damaged the tubes, but i'll start with replacing these 20c parts first.
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