50W chassis

A place to discuss wiring, installation, diagrams and so on.

Re: 50W chassis

Postby shakti » Tue Jun 07, 2011 5:34 pm

1 piece of 1) for me.

Just a thought: is a voltage selector a must? I think it just clutters things up inside the amp, adds costs, and precious few of us will be touring the world with these things...

I also wouldn't mind a Bulgin cutout rather than IEC, but will go with either.
Last edited by shakti on Tue Jun 07, 2011 5:39 pm, edited 1 time in total.
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Re: 50W chassis

Postby shakti » Tue Jun 07, 2011 5:37 pm

Furthermore, will there be any rear panels available? If not, does anyone know of any?
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Re: 50W chassis

Postby Brian Wallace » Sun Jun 12, 2011 8:19 pm

I just see enough interest in the Bulgin connector to make these available. I know you can alter the chassis to accept a Bulgin and have a panel made that is cut for the Bulgin.

As for panels, I would check with Sparky on the Metro forum for accurate panels.
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Re: 50W chassis

Postby shakti » Mon Jun 13, 2011 4:22 am

OK, I'm cool with that. I have Sparky's front panels, didn't know he was doing rear panels yet?

One last thing; what about adding those little "keyholes" for the taps on the pots, that secures them into place? Ceriatone chassis has them, and I think they're a great added feature without messing with the overall appearance and authenticity too much.
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Re: 50W chassis

Postby ReidarNikolai » Wed Jun 15, 2011 2:23 pm

Hi Brian

I want one nr 1) and one number 2)
Which means that i've just doubled my order :) - I want two 50W chassis...

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Re: 50W chassis

Postby riccarp » Wed Jun 22, 2011 2:22 am

Hi, would this chassis be ok for a 45 build?

Dan
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Re: 50W chassis

Postby neikeel » Wed Jun 22, 2011 6:11 pm

riccarp wrote:Hi, would this chassis be ok for a 45 build?

Dan


Almost certainly. The transformer spacings are the same.

Only odd thing might be the front panel alignment which is slightly different between the alloy jtms and the steel JTM and JMP when you put them in a head cab.

The 50s have both fuses on the back panel but the 45 has the HT inside. No big deal (more like the JTM45RI).
Neil
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Re: 50W chassis

Postby Tone_Merc » Fri Jun 24, 2011 12:17 pm

Brian, count me in for a 50W chassis. I would prefer the Bulgin connector, but I'm down for whatever.

Mike
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Re: 50W chassis

Postby freebird » Thu Jun 30, 2011 3:20 pm

Hi Brian,

count me also for one chassis of type 1) .

Thanks
Daniel
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Re: 50W chassis

Postby ScienceFriction » Sun Jul 03, 2011 12:25 am

Hi Brian, everyone, thanks for letting me join your group. If there is still time, please put me down for one of the 50 watt chassis, spec #1. I plan on building a 1967 spec JMP50 1986, and this looks perfect.

I do have one question though, is the top mounted filter cap how the amp originally came, and is there any major differences between top and internal mount other than personal preference? Thanks, sorry for any annoyances, this will be my first build. :oops:
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Re: 50W chassis

Postby shakti » Sun Jul 03, 2011 5:05 am

I'll reply: the top mounted preamp filter cap came in probably in late 1968 or early 1969. For 1967 you want the preamp filter cap mounted on the preamp board. At some transition point it was moved to the inside wall, near the PT (where the screens and PI filter cap used to be when the amps were made with a tube rectifier), but eventually moved up top.

The only difference is that mounted on the preamp board it will be an axial cap, and mounted on top it will be a radial (can) type.
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Re: 50W chassis

Postby ScienceFriction » Sun Jul 03, 2011 11:50 am

Thanks shakti! With all the variation in Marshall amps I'm always learning something new, haha. I'm trying to build as much of a replica as I can, so I really appreciate the time people take to answer my questions.
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Re: 50W chassis

Postby neikeel » Mon Jul 04, 2011 11:02 am

This is what you are building?:

http://marstran.com/6768%2011451.htm
Neil
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Re: 50W chassis

Postby Brian Wallace » Mon Jul 04, 2011 12:04 pm

I'm ready to start the ball rolling on this chassis. The cost should be about $95 per chassis. Shipping is as follows for a single chassis: Flat Rate in the US is $14.95, Priority mail to Canada is $32.00, Priority mail to all other countries is $45.00.

1) Will have the internal side mounted filter cap, IEC, Modern ohms selectors.

2) Will have the filter cap on top, IEC, Modern ohms selectors.
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Re: 50W chassis

Postby ScienceFriction » Mon Jul 04, 2011 3:22 pm

neikeel wrote:This is what you are building?:

http://marstran.com/6768%2011451.htm


Yeah, pretty much, a JMP 50 1986 with the 1967 circuit. I don't want to hijack this thread too much with stuff about it, maybe I'll start a thread soon once I get some of the stuff together.

Brian, I don't mean to sound clueless, but when are you taking payment for the chassis and should we email our information and specs to you?
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