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Amplified Parts
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| |-+  JCM 800 2203, 2204, 2550, 2555
| | |-+  2204 Output Transformer assembly question		 « previous next »
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Author Topic: 2204 Output Transformer assembly question  (Read 8865 times)
ChadFunkRailroad
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« on: April 05, 2012, 02:45:36 AM »
Hi All,

I have a 2204 minus the trans. and tubes from Nik, and I need some help
with hooking up a few wires of the OT.
The ohms leads to the ohms selector, I got that,  but the other three wires
(red,brow, white) I'm having a hard time with.  It is a Mojotone OT.


Also, the choke has 2 wires, black and red, there is no indication of polarity.?

thanks for any help

chad


the blue arrows/marks are my choke solder points (polarity?)
the red arrows are my OT solder points
« Last Edit: April 05, 2012, 02:52:09 AM by ChadFunkRailroad » Logged
wyatt
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« Reply #1 on: April 05, 2012, 04:18:35 AM »
Here is the OT's specs...Brown is the center tap.  White goes to V5 (the EL34 on the end), Red goes to V4 (the other EL34).

http://www.mojotone.com/site/images/pdf.gif

While, it is *not* impossible for a choke to have polarity, or a rectifier-facing end (higher insulation), typically in these days, there is no polarity, especially if not marked on the choke.

I will add an unsolicited comment that this is a red flag that you may want to have a tech do this. 

« Last Edit: April 06, 2012, 12:31:43 AM by wyatt » Logged
ChadFunkRailroad
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« Reply #2 on: April 05, 2012, 08:29:53 PM »
OK thanks for the help.

So white goes on pin 3 of the V5
and red goes to the pin 3 on V4
and brown goes to HT fuse 0.5A T

and on the choke there is no polarity.
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wyatt
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« Reply #3 on: April 06, 2012, 12:35:12 AM »
Correct. 

Ceriatone Brown=Mojotone White
Ceriatone Blue=Mojotone Red
Ceriatone Red= Mojotone Brown

Ceriatone is using traditional American color coding (Fender, Gibson, and others had the Brown Red and Blue wires), Mojotone is using the traditional Marshall color code.

I should also point out I had a typo above it should have said "while it is *not* impossible for a choke to have polarity," it does not in this case.
« Last Edit: April 06, 2012, 12:39:56 AM by wyatt » Logged
ChadFunkRailroad
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« Reply #4 on: April 14, 2012, 01:35:46 PM »
Finished with my Amp, thanks for all the help. It sounds amazing!

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« Last Edit: April 14, 2012, 01:39:59 PM by ChadFunkRailroad » Logged
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