Is this a Marshall Major?
Moderators: pompeiisneaks, Colossal
-
TonewolfAmps
- Posts: 14
- Joined: Fri Aug 10, 2018 5:26 pm
- Location: Port Hueneme, CA USA
- Contact:
Is this a Marshall Major?
A buddy of mine found this amp for sale for dirt cheap and we're trying to figure out if it's a real Marshall Major. The guy he is talking to buys abandoned storage units and this amp and another Major PA (with 8 inputs) was in it. The major PA is definitely real but we're not sure on this one.
You do not have the required permissions to view the files attached to this post.
-
martin manning
- Posts: 13209
- Joined: Sun Jul 06, 2008 12:43 am
- Location: 39°06' N 84°30' W
1 others liked this
Re: Is this a Marshall Major?
Looks like it is to me. Chassis is painted?
-
Stevem
- Posts: 4576
- Joined: Fri Jan 24, 2014 3:01 pm
- Location: 1/3rd the way out one of the arms of the Milkyway.
Re: Is this a Marshall Major?
This is a Major output transformer, they have no end Bells and neither do the power transformers.
The secondary side on these have 10 wires.
The OT tip's the scale at 16 lbs.
Also 6550s can not be used in a Major because they have 620 volts on the plates and the screens, and the screens in 6550s are rated for 400 to 440 volts max, so the Majors must run KT88s or some of the new bigger ones.
The PI tube in Majors is a 12AU7, if you put in a 12AX7 the amp will only output 150 watts of RMS power or so, and this is the same deal with the Hiwatt 200s also by the way!
The fuse ratings on that chassis do look correct!
The secondary side on these have 10 wires.
The OT tip's the scale at 16 lbs.
Also 6550s can not be used in a Major because they have 620 volts on the plates and the screens, and the screens in 6550s are rated for 400 to 440 volts max, so the Majors must run KT88s or some of the new bigger ones.
The PI tube in Majors is a 12AU7, if you put in a 12AX7 the amp will only output 150 watts of RMS power or so, and this is the same deal with the Hiwatt 200s also by the way!
The fuse ratings on that chassis do look correct!
You do not have the required permissions to view the files attached to this post.
When I die, I want to go like my Grandfather did, peacefully in his sleep.
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
-
TonewolfAmps
- Posts: 14
- Joined: Fri Aug 10, 2018 5:26 pm
- Location: Port Hueneme, CA USA
- Contact:
Re: Is this a Marshall Major?
I wonder why the chassis is punched for 6x 8pin sockets? Also did they sell the major in the US or is this a 220v amp?
I'll pay anything to get something for free!
-
Stevem
- Posts: 4576
- Joined: Fri Jan 24, 2014 3:01 pm
- Location: 1/3rd the way out one of the arms of the Milkyway.
Re: Is this a Marshall Major?
They made slave amps that where well over 200 watts.
When I die, I want to go like my Grandfather did, peacefully in his sleep.
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
-
martin manning
- Posts: 13209
- Joined: Sun Jul 06, 2008 12:43 am
- Location: 39°06' N 84°30' W
Re: Is this a Marshall Major?
Here's a '72. More photos here: https://reverb.com/item/4939472-1972-ma ... kt88-tubes Earlier ones had the small rectifier board mounted on the top of the chassis. Transformers with end bells were common.
You do not have the required permissions to view the files attached to this post.
-
Stevem
- Posts: 4576
- Joined: Fri Jan 24, 2014 3:01 pm
- Location: 1/3rd the way out one of the arms of the Milkyway.
Re: Is this a Marshall Major?
Good to know that transformer info!
I have only worked on 3 of these Back breakers and I think all of them where no younger then 1970.
I have only worked on 3 of these Back breakers and I think all of them where no younger then 1970.
When I die, I want to go like my Grandfather did, peacefully in his sleep.
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!