I'm building an ODS-style amp out of stuff I have hanging around. I decided to use a JTM45 style chassis that's been various experimental amps over the years (as I recall, it is Weber JM45 chassis from many years ago).
It's your usual 4-input, 6 pots, pilot lamp, and Marshall-style standby and power large bat switches. I'm pretty sure I can relocate the pilot lamp and get 7 pots on the panel. Maybe move power and standby to the back, but that's a bit of work.
There are various iteration of ODS with varying knob counts from 6 to 9, plus switches on the front panel. Just sorting out in my head how many I really need/want.
Thoughts?
I've built to the main ODS board to fit the chassis (high-plate/HRM style), and have started the various power supply boards and relay boards. Just really a question of how many knobs do I need on the front, what can be relocated to the rear or left out.
How many knobs does an ODS need?
Moderators: pompeiisneaks, Colossal
Re: How many knobs does an ODS need?
I would do Volume, Treble, Middle, Bass, OD, Ratio, and Master on the front. Presence on the back. Or a switched pot on the master with the older accent arrangement there.
-Dan
-Dan
Re: How many knobs does an ODS need?
Seems sensible. I think 7 front panel pots are doable by moving the pilot light. I was maybe thinking concentric master volumes for clean and drive? I have some concentric pots I could swap the resistor wafers to get the needed values.
How about front panel switches? I might be able to squeeze some mini toggles in on the panel, but not a lot of them. Between space and dodging the existing holes, there's not a lot of margin to work with.
How about front panel switches? I might be able to squeeze some mini toggles in on the panel, but not a lot of them. Between space and dodging the existing holes, there's not a lot of margin to work with.
Re: How many knobs does an ODS need?
Do you have room for switches above the pots like two-rock does it?
If not, I would hardwire it in rock mode, PAB switch on the back with a relay and find somewhere for the mid switch. I don't use the bright switch often, so I wouldn't miss it personally.
-Dan
If not, I would hardwire it in rock mode, PAB switch on the back with a relay and find somewhere for the mid switch. I don't use the bright switch often, so I wouldn't miss it personally.
-Dan
Re: How many knobs does an ODS need?
Did some drilling tonight and I got 8-pots on the face of the Weber 6M45 chassis. I enlarged the pilot light hole, and put a new 3/8" hole in between the second pair of input jack holes.
This is what it looks like with the power switches, 8 random stunt pots installed and a couple of input jacks. They're all straight across and evenly spaced. Drifted the pot at the left maybe 1/64" low, but it isn't noticeable.
With the right knobs and cabinet setup, I should be able to install the switches. Not in the traditional ODS position, but between the knobs and above.
Maybe someday I'll spring for a printed circuit board for the front panel with labels.
I've got a Peavey Vypyr head that I paid doodly-squat for just for the cabinet, less than wood would have cost to make one and I have a perfectly working Vypyr 30 watt modeling head chassis to unload. Someone had already dressed it up kinda-Dumblish with aluminum trim instead of the batwing plastic and painted the tolex light blue. It looks kinda cool inspite of itself.
This is what it looks like with the power switches, 8 random stunt pots installed and a couple of input jacks. They're all straight across and evenly spaced. Drifted the pot at the left maybe 1/64" low, but it isn't noticeable.
With the right knobs and cabinet setup, I should be able to install the switches. Not in the traditional ODS position, but between the knobs and above.
Maybe someday I'll spring for a printed circuit board for the front panel with labels.
I've got a Peavey Vypyr head that I paid doodly-squat for just for the cabinet, less than wood would have cost to make one and I have a perfectly working Vypyr 30 watt modeling head chassis to unload. Someone had already dressed it up kinda-Dumblish with aluminum trim instead of the batwing plastic and painted the tolex light blue. It looks kinda cool inspite of itself.
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