mentoneman
Well-known member
the 'Maker got a hold on you boy...
takes a while but once the light comes on
others amps start feeling strange
takes a while but once the light comes on
others amps start feeling strange
Greazygeo
Well-known member
Is the HT fuse blowing too? I've not seen too many amps take out the mains fuse if its a blown OT. Have you had any power tube failures recently?
glip22
Well-known member
I think he said just the mains fuse George. That would be a PT issue not OT right?Greazygeo":31b1xa91 said:
Greazygeo
Well-known member
That's more where I would be looking...PT, filter caps or diodes. I wouldnt rule out anything, but the OT's I've blown up in Marshalls were due to failing output tubes. It would take out the HT fuse and no sound...never took out a mains fuse though.glip22":384jrx4r said:
tweed
New member
Holy shit Shea, first you wake up in an alley with no pants on the wrong side of town, and now this? WTF!?! 
Gainfreak
New member
hahahhaa!! Beat me to it!! I was wondering if he had burn marks around his mouth hahahatweed":103o2brv said:Holy shit Shea, first you wake up in an alley with no pants on the wrong side of town, and now this? WTF!?!
I kid I kid!!!
Telephant
Active member
mentoneman":26741o6x said:
That's exactly what happened.
I sent my buddy a link to this thread so hopefully he'll chime in and we can figure some of this out. It would be great to find out it's not the OT. I'd attempt to answer some of your questions but I don't know what I'm talking about.
Telephant
Active member
Gainfreak":ukx1je2n said:hahahhaa!! Beat me to it!! I was wondering if he had burn marks around his mouth hahahatweed":ukx1je2n said:Holy shit Shea, first you wake up in an alley with no pants on the wrong side of town, and now this? WTF!?!
I kid I kid!!!
ejecta
Active member
danyeo":2zrzz4lu said:King Crimson":2zrzz4lu said:Should of got a Diezel. F'kers will never learn.
He gigs so he needs to cut through a band mix.
Greazygeo
Well-known member
If it is blown and a MM transformer, just contact them. You may have to send it in but I'm sure they will either repair it or replace it. Probably have to pay for it, but they aren't that expensive.Telephant":myllg2g7 said:mentoneman":myllg2g7 said:
That's exactly what happened.
I sent my buddy a link to this thread so hopefully he'll chime in and we can figure some of this out. It would be great to find out it's not the OT. I'd attempt to answer some of your questions but I don't know what I'm talking about.
G
GlassTornado
New member
Hey guys,
I'm the fella helping shea here with his Peacemaker. After reading through the thread, I certainly appreciate any confirmations or suggestions.
glip22: The caps were my first suspect. I try to make transformers my last area of focus, because very rarely have I found a dead tranny on any of the many amps that i've opened up. The reason I'm fairly certain the caps are fine, is because when the red B+ primary of the OT is disconnected, and everything else is fine...all caps, the board gets energized, and all of them are very steady in their voltage readings. Unless there's something else that I'm missing, I feel like I've effectively ruled them out, and I don't just wanna go pulling caps on a hunch...especially when much more of the evidence leads, as much as I hate to say it, to the OT. I guess until it's fixed it's not 100% certain, but if it was a filter cap, I would be absolutely surprised.
As far as it being the PT, I would assume that the mains fuse would blow even when I had everything disconnected back to where it was just feeding the rectifier with the standby switch on, which it did not.
protoplasma: I'm bringing it up on a variac. the fuses are the correct ratings.
Nigel Tufnel: checking the tube sockets is a very good idea as well, but alas i did check the sockets for arcing, we well as metering between the connections on the bottom of the socket to the female part of the connection on the top to check for a break in the metal internally (which i have found before coincidentally...and it drove me mad until i found it)
From the aspects that i've looked at in my testing, this all points to the OT, and I think me and Shea were hoping for the best on this and it being something I just overlooked.
As far as the filter cap angle, with EVERYTHING else connected and powering up, and not the power to the OT, what would possibly make the filter cap still be a viable source of the circuit failure? I don't think it is...but i'm also not proud...if i can be helped i'll take it !
I'm the fella helping shea here with his Peacemaker. After reading through the thread, I certainly appreciate any confirmations or suggestions.
glip22: The caps were my first suspect. I try to make transformers my last area of focus, because very rarely have I found a dead tranny on any of the many amps that i've opened up. The reason I'm fairly certain the caps are fine, is because when the red B+ primary of the OT is disconnected, and everything else is fine...all caps, the board gets energized, and all of them are very steady in their voltage readings. Unless there's something else that I'm missing, I feel like I've effectively ruled them out, and I don't just wanna go pulling caps on a hunch...especially when much more of the evidence leads, as much as I hate to say it, to the OT. I guess until it's fixed it's not 100% certain, but if it was a filter cap, I would be absolutely surprised.
As far as it being the PT, I would assume that the mains fuse would blow even when I had everything disconnected back to where it was just feeding the rectifier with the standby switch on, which it did not.
protoplasma: I'm bringing it up on a variac. the fuses are the correct ratings.
Nigel Tufnel: checking the tube sockets is a very good idea as well, but alas i did check the sockets for arcing, we well as metering between the connections on the bottom of the socket to the female part of the connection on the top to check for a break in the metal internally (which i have found before coincidentally...and it drove me mad until i found it)
From the aspects that i've looked at in my testing, this all points to the OT, and I think me and Shea were hoping for the best on this and it being something I just overlooked.
As far as the filter cap angle, with EVERYTHING else connected and powering up, and not the power to the OT, what would possibly make the filter cap still be a viable source of the circuit failure? I don't think it is...but i'm also not proud...if i can be helped i'll take it !
LP Freak
Well-known member
yngzaklynch
New member
danyeo":1q3vx7r6 said:King Crimson":1q3vx7r6 said:Should of got a Diezel. F'kers will never learn.
He gigs so he needs to cut through a band mix.
You're on fire this week. Thanks for the laughs.
C
chumbucket
Well-known member
LP Freak":22ok56zc said:
That sounds like a pretty good deal. I bet the OT is at least $150 or so from MM.
J
JJGray
Member
LP Freak":1j9rrm9c said:
And if that doesn't help, you could not post a thread on Vic's Mojave forum:
http://vintageamps.com/plexiboard/viewf ... 29a6deae69
of just call him directly: (760) 515-2578
or even email him: victor@mojaveampworks.com
Vic's a great guy. I bought both my Peacemaker and Scorpion directly from him.
Good luck with the fix!
N
nedezero
New member
Telephant":1cdgq2cd said:mentoneman":1cdgq2cd said:
That's exactly what happened.
I sent my buddy a link to this thread so hopefully he'll chime in and we can figure some of this out. It would be great to find out it's not the OT. I'd attempt to answer some of your questions but I don't know what I'm talking about.
Great show last night Shea! I really dig the biker Jeff Foxworthy look
Regarding your Mojave, the only way to really isolate the power transformer as being the problem is to disconnect it from the rectifier circuit, and then see if it still blows fuses. If it does, it's the transformer, if it doesn't, it's most likely something in the power supply section like a shorted cap or rectifier (this is what I suspect).
Telephant
Active member
nedezero":9e2u653g said:Telephant":9e2u653g said:mentoneman":9e2u653g said:
That's exactly what happened.
I sent my buddy a link to this thread so hopefully he'll chime in and we can figure some of this out. It would be great to find out it's not the OT. I'd attempt to answer some of your questions but I don't know what I'm talking about.
Great show last night Shea! I really dig the biker Jeff Foxworthy look
Regarding your Mojave, the only way to really isolate the power transformer as being the problem is to disconnect it from the rectifier circuit, and then see if it still blows fuses. If it does, it's the transformer, if it doesn't, it's most likely something in the power supply section like a shorted cap or rectifier (this is what I suspect).
Thanks for coming out man! It was good to see you guys!
OBGYNkanobi
New member
I was going to sell the iron out of my PM, and replace the PT and choke with Marstran iron, but I just sold the amp instead, minus the OT, which I still have. That PM had a Marstran C1998 OT in it, that I'm a little partial too. The sound is very close; I just find the Marstran a little more laid back and bluesy, as opposed to the Merc's more aggressive, slightly edgier, "in your face" sound. I'm not in a hurry to sell it, but I can part with it if you need it. The O-100JM is also very close to the stock Peacemaker OT as well; I think you'd be hard pressed to hear a discernible difference.LP Freak":207zf5dy said:
