M-2 resurrected!

stoutblock

"If it sounds good, it is good." Duke Ellington

Subscriber

• Jan 13, 2011

• #21

Bringing up this old post. We got the power supply to work fine (replaced a couple of resistors and diodes). Still could not get bias on LH side and RH was random so I sent it to Dave to see if he can chase down this problem.

So far he has replaced the TO-220 driver and was able to get a bias reading but its not stable.

Dave, may much karma go your way :yes:

 

bonsainut

New Member

• Feb 4, 2011

• #22

I love threads like this. I appreciate the time it takes to take good photos while in the midst of a project like this and just wanted to say "thank you!"

 

stoutblock

"If it sounds good, it is good." Duke Ellington

Subscriber

• Feb 6, 2011

• #23

bonsainut said:

I love threads like this. I appreciate the time it takes to take good photos while in the midst of a project like this and just wanted to say "thank you!"

Click to expand...

No problem, I was just returning the favor for others who have done the same. Photos sure help. Dave still has my amp in his queue.

 

bhebbel

Well-Known Member

• Feb 6, 2011

• #24

I'll be following in your footsteps this week. I'm picking up a M-2 w/great cosmetics, one weak cahnnel, $100. I coudn't walk away from this one.

Wish me luck.
BH

 

avionic

" Black Knights "------- F-15 " Wizard "

Subscriber

• Feb 6, 2011

• #25

In work..

 

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stoutblock

"If it sounds good, it is good." Duke Ellington

Subscriber

• Feb 6, 2011

• #26

avionic said:

In work..

Click to expand...

 

avionic

" Black Knights "------- F-15 " Wizard "

Subscriber

• Apr 10, 2014

• #27

Long story short. I ended up buying this piece from stoutblock a while back.

After rebuilding the bias circuit on one channel it has been performing fabulously until.... Last night. I don't have the spare time right now to troubleshoot. Judging from the symptoms so far, it must have blown one or both of the mains fuses . No lights,no clicky, no transformer inrush hum.:scratch2: Happy friggin birthday Dave.

 

stoutblock

"If it sounds good, it is good." Duke Ellington

Subscriber

• Apr 10, 2014

• #28

funny how that amp caused problems. My other M-2 has never been touched and has always worked perfect. go figure

 

avionic

" Black Knights "------- F-15 " Wizard "

Subscriber

• Apr 10, 2014

• #29

stoutblock said:

funny how that amp caused problems. My other M-2 has never been touched and has always worked perfect. go figure

Click to expand...

Yeah. I was listening to it very early this morning. Might have had it cranked up to .5 watts or less. Went up to the kitchen to refill the coffee. Came back and the amp was dead.No lights,no nothing.....So I fired up the B-6's and pressed on.

 

mech986

AK Subscriber

Subscriber

• Apr 10, 2014

• #30

Sounds similar to a PC2002M that baffled Fred in San Diego, couldn't get that board channel to stay stable either.

Wonder if its a conductive path somewhere? At least the fuses blew, hope it wasn't the outputs.

 

avionic

" Black Knights "------- F-15 " Wizard "

Subscriber

• Apr 11, 2014

• #31

hope it wasn't the outputs.

Click to expand...

I'm bett'n it probably is. I'm thinking the amp probably has been working just fine for close to 18 months at least.

 

stoutblock

"If it sounds good, it is good." Duke Ellington

Subscriber

• Apr 13, 2014

• #32

Didn't that amp still have the original Toshiba's?

 

avionic

" Black Knights "------- F-15 " Wizard "

Subscriber

• Apr 13, 2014

• #33

I don't remember. I haven't had any free time to even pop the cover on it yet.