Search found 9 matches

by gregfromhawaii
Sat Apr 06, 2019 5:16 pm
Forum: Vintage Amps (Before 1991)
Topic: MARK III BLACK STRIPE SNAP CRACKLE POPPING
Replies: 14
Views: 1623

Re: MARK III BLACK STRIPE SNAP CRACKLE POPPING

Capacitors not coming in until 4/15 - I guess they are shipping by boat. I’ll keep u folks posted.
by gregfromhawaii
Thu Apr 04, 2019 2:17 pm
Forum: Vintage Amps (Before 1991)
Topic: MARK III BLACK STRIPE SNAP CRACKLE POPPING
Replies: 14
Views: 1623

Re: MARK III BLACK STRIPE SNAP CRACKLE POPPING

Congrats my friend!!! You just successfully narrowed down an intermittent component. Your video helped us do it. That looks to be C511 on our Black Stripe Schematic. It's rotated completely opposite where it should sit. Here is the board layout and schematic so you can position correctly: https://d...
by gregfromhawaii
Wed Apr 03, 2019 2:55 pm
Forum: Vintage Amps (Before 1991)
Topic: MARK III BLACK STRIPE SNAP CRACKLE POPPING
Replies: 14
Views: 1623

Re: MARK III BLACK STRIPE SNAP CRACKLE POPPING

And given the burn mark under it, I ordered several new orange Sprague caps, which should come in a few days.
by gregfromhawaii
Wed Apr 03, 2019 2:52 pm
Forum: Vintage Amps (Before 1991)
Topic: MARK III BLACK STRIPE SNAP CRACKLE POPPING
Replies: 14
Views: 1623

Re: MARK III BLACK STRIPE SNAP CRACKLE POPPING

When you get a chance can you post a clean pic of the chassis guts. A good overhead of the whole or maybe in three sections R-L... Often one of us will just see something amiss. If you have a good pair of insulated(rubber handle)needle nose pliers you can do the following... With the amp powered up...
by gregfromhawaii
Tue Apr 02, 2019 9:37 pm
Forum: Vintage Amps (Before 1991)
Topic: MARK III BLACK STRIPE SNAP CRACKLE POPPING
Replies: 14
Views: 1623

Re: MARK III BLACK STRIPE SNAP CRACKLE POPPING

And Casey - I did check out your old thread! I dread to take out the board, but I might have to if I can't locate the source of the issue using lovetoboogie's chopstick method. Here's another video of the amp when I first turn it on from standby: https://www.youtube.com/watch?v=DL4DVattF1o I popping...
by gregfromhawaii
Tue Apr 02, 2019 9:28 pm
Forum: Vintage Amps (Before 1991)
Topic: MARK III BLACK STRIPE SNAP CRACKLE POPPING
Replies: 14
Views: 1623

Re: MARK III BLACK STRIPE SNAP CRACKLE POPPING

Thanks for the replies! I will try the chop stick method! My amp repair skills (or lack thereof) consists of looking for blown capacitors, loose wires or burnt out resistors. Replacing the caps were not that difficult in terms of soldering loose the old caps and sucking out the old solder and solder...
by gregfromhawaii
Tue Apr 02, 2019 7:08 pm
Forum: Vintage Amps (Before 1991)
Topic: MARK III BLACK STRIPE SNAP CRACKLE POPPING
Replies: 14
Views: 1623

Re: MARK III BLACK STRIPE SNAP CRACKLE POPPING

It occurred after the cap change. Before that it stopped working and I assumed it was the ruptured capacitor.
by gregfromhawaii
Tue Apr 02, 2019 4:45 pm
Forum: Vintage Amps (Before 1991)
Topic: MARK III BLACK STRIPE SNAP CRACKLE POPPING
Replies: 14
Views: 1623

MARK III BLACK STRIPE SNAP CRACKLE POPPING

Hi folks - I am a newbie to this forum. I have a problem with my Mesa Boogie Mark III Black Stripe Long Head, which just makes this horrible loud snap, crackle and popping. The amp stopped working and I found that one of the two 50uf 75v capacitor leaked out. I changed both of those capacitors and c...