Monkeymatic ODS #183
Moderators: pompeiisneaks, Colossal
Monkeymatic ODS #183
I was not planning to build an ODS, but user snuffy offered a beautiful head cab with Vox cloth and CE chassis, and I couldn't resist.
I opted for the #183 circuit, because it seemed well documented, and, well, I don't know what I don't know. I used ClassicTone iron, Colossal's excellent 5v PSU and relay units, and an assortment of parts on hand.
Lou (JazzGuitarGimp) made an extremely cool precision power supply board for this project, with rectifier and bias components on the same board. Great design, easy to wire up, and perfectly implemented. That saved space on the wall for the Hammond filament transformer for the switching system--good news, because that Hammond would not fit in the space traditionally occupied.
This project required a lot of squinting at the schematic and layout--some parts (red type on wood background!?!) are illegible. There are a couple of connections missing on the schematic; these issues are documented in the #183 thread.
So I was VERY happy when I had finished wiring, found I had missed only one solder joint, and needed to swap the OT secondaries, but that's it. Everything works GREAT! I have 440v plates, running at about 65% dissipation, showing ~80 watts clean.
Hope you can benefit from the detailed photos of my lead dress choices. This is a TIGHT build, and it's certainly best if you can do the bottom layer and work up, but I certainly had to go back and thread wires thru the weave. Amp is remarkably quiet at idle.
The sound is awesome, and so flexible, with all the tone controls. I'm taking it to play the Friday Night Concert in the city plaza tomorrow night. Rock!
I opted for the #183 circuit, because it seemed well documented, and, well, I don't know what I don't know. I used ClassicTone iron, Colossal's excellent 5v PSU and relay units, and an assortment of parts on hand.
Lou (JazzGuitarGimp) made an extremely cool precision power supply board for this project, with rectifier and bias components on the same board. Great design, easy to wire up, and perfectly implemented. That saved space on the wall for the Hammond filament transformer for the switching system--good news, because that Hammond would not fit in the space traditionally occupied.
This project required a lot of squinting at the schematic and layout--some parts (red type on wood background!?!) are illegible. There are a couple of connections missing on the schematic; these issues are documented in the #183 thread.
So I was VERY happy when I had finished wiring, found I had missed only one solder joint, and needed to swap the OT secondaries, but that's it. Everything works GREAT! I have 440v plates, running at about 65% dissipation, showing ~80 watts clean.
Hope you can benefit from the detailed photos of my lead dress choices. This is a TIGHT build, and it's certainly best if you can do the bottom layer and work up, but I certainly had to go back and thread wires thru the weave. Amp is remarkably quiet at idle.
The sound is awesome, and so flexible, with all the tone controls. I'm taking it to play the Friday Night Concert in the city plaza tomorrow night. Rock!
You do not have the required permissions to view the files attached to this post.
Last edited by xtian on Fri Jun 02, 2017 12:15 am, edited 1 time in total.
I build and repair tube amps. http://amps.monkeymatic.com
Re: Monkeymatic ODS #183
more pix
You do not have the required permissions to view the files attached to this post.
I build and repair tube amps. http://amps.monkeymatic.com
Re: Monkeymatic ODS #183
moar
You do not have the required permissions to view the files attached to this post.
I build and repair tube amps. http://amps.monkeymatic.com
- pompeiisneaks
- Site Admin
- Posts: 4222
- Joined: Sat Jan 14, 2017 4:36 pm
- Location: Washington State, USA
- Contact:
Re: Monkeymatic ODS #183
That looks outstanding! I'd love to hear some sound samples
~Phil
~Phil
tUber Nerd!
-
- Posts: 701
- Joined: Mon Dec 01, 2014 8:48 am
- Location: Durban South Africa
Re: Monkeymatic ODS #183
Beautiful work!! Interesting power distribution
If it sounds good, it is good! Trust your ears
Re: Monkeymatic ODS #183
That's really nice work xtian, thanks for all the pics, great.
Re: Monkeymatic ODS #183
Remarkable well done! THANKS for sharing the photos. Nice work.
with respect, 10thtx
with respect, 10thtx
Re: Monkeymatic ODS #183
Nice build!
What made you do the power distribution this way?
Also the wiring to and from the master running it close to the tonestack; does it have any pros/cons for you?
Not judging but that wiring is super critical since it is not shielded. Curious about your experiences!
What made you do the power distribution this way?
Also the wiring to and from the master running it close to the tonestack; does it have any pros/cons for you?
Not judging but that wiring is super critical since it is not shielded. Curious about your experiences!
Re: Monkeymatic ODS #183
Running B+ to the preamps was the last step in this build, because the Power PCB arrived last. So it was partly an accident of timing. But it pays to think in three dimensions, especially in a build this dense.erwin_ve wrote: ↑Fri Jun 02, 2017 1:35 pm Nice build!
What made you do the power distribution this way?
Also the wiring to and from the master running it close to the tonestack; does it have any pros/cons for you?
Not judging but that wiring is super critical since it is not shielded. Curious about your experiences!
I noticed the MV wires are not shielded in the 183. So my wires are tied to the ground buss! The tone stack wires do not get anywhere close to the MV wires. And the Presence wires also are carefully isolated.
Thanks for the feedback, everyone!
I build and repair tube amps. http://amps.monkeymatic.com
Re: Monkeymatic ODS #183
Beautiful work dude! Very nice!
Re: Monkeymatic ODS #183
Thanks! I LOVE the features on your relay boards--the jumper traces that allow connections on either side of the relay, the extra LED leads, even the socket for the relay (removing the relay made it easier to solder). Wonderful!
I build and repair tube amps. http://amps.monkeymatic.com
Re: Monkeymatic ODS #183
T'is fine when planning not works out so very well. Would commend HAD to look carefully through and learn some new things about design.
Best .. Ian
Best .. Ian
-
- Posts: 213
- Joined: Sun Feb 02, 2014 6:13 pm
Re: Monkeymatic ODS #183
I wish I could get my amps to look that clean. Thats a real art. How hard is it to silkscreen your logo on there?
Re: Monkeymatic ODS #183
Great job!
Man I am really wanting to do an ODS build. Anyone want to buy a set of very lightly used V-Drums so I can afford it?
Man I am really wanting to do an ODS build. Anyone want to buy a set of very lightly used V-Drums so I can afford it?
Re: Monkeymatic ODS #183
I build and repair tube amps. http://amps.monkeymatic.com