Hudson - Electronic Broadcast [traced]
Hello.
I'm a new user of this forum and a french guy, so excuse me if my words are not precise.
I'm looking for this pédal...
They say that is inspired by an old RCA broadcast mic preamp. Did anyone have anything about it ?
I'm a new user of this forum and a french guy, so excuse me if my words are not precise.
I'm looking for this pédal...
They say that is inspired by an old RCA broadcast mic preamp. Did anyone have anything about it ?
Information
The guys over at TagboardFX have done a few vero layouts of this one:
http://tagboardeffects.blogspot.com/201 ... dcast.html
http://tagboardeffects.blogspot.com/201 ... dcast.html
Loe Sounds
- Manfred
- Tube Twister
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Where I can find the schematic of it.
- johnk
- Resistor Ronker
just an FYI. i built both versions (the newer 24V version and the original 9V version which i own) and i like the original 9V version running on 18 or 24 volts better, so i drew up another PCB & built the older version and it sounds identical to my original.
here's the PCB layout for the one that i prefer:
here's the PCB layout for the one that i prefer:
- Manfred
- Tube Twister
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I have a further question.
Are gain selections of the transistor needed?
Are gain selections of the transistor needed?
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- gigelmargel
- Resistor Ronker
Hello!
Anyone can post the voltages of the transistors, mainly the ones of OC74?
I have only some AC128s and I want to know if are biased right or not.
Thank you!
Anyone can post the voltages of the transistors, mainly the ones of OC74?
I have only some AC128s and I want to know if are biased right or not.
Thank you!
- gigelmargel
- Resistor Ronker
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- Posts: 49
- Joined: 10 Nov 2013, 08:01
- my favorite amplifier: Ampeg
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Creepy Fingers Doomidrive
Black Arts Quantum Mystic
Roger Mayer Voodoo Bass
Idiot box Blowerbox
Hudson Sidecar
Pcb builds:
Fulltone 69 (GGG kit)
Russian Big Muff (Musikding kit)
EHX Bassballs (home etched using Topopiccione layout)
BJFE BBOD (home etched, thx FSB)
Triangle Muff (Guitar PCB board)
Deluxe Bass Fuzz (home etched,gausmarkov.net layout)
Clone Theory Chorus (Celeste pcb from lectric-fx)
Cornish G2 (home etch, layout thx FSB)
Shin-Ei FY-2 Ge version (home etched, own layout)
Klon (Aion Refractor pcb)
Mutron Phasor II (home etched, layout thx JohnK)
Sunny-T (pcb by guitar pcb)
Rocket Overdrive (pcb by Pepers' pedals)
Sonomatic Deluxe Tape Delay (pcb by Skidmark)
Black Arts Quantum Mystic (adapted storyboardist layout) - Location: Lausanne, Switzerland
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johnk wrote:i drew up a schematic for my 9V version today. it's the one with the trimpot for the high gain.
[ Image ]
I just traced my Broadcast 24V. I unsoldered all diodes on the power supply board to be sure of the type. I made an true to the original vero layout and measured the voltages on both transistors.
If you have any questions feel free to ask. I took many pictures. I can post them later.
Vincent
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- Posts: 49
- Joined: 10 Nov 2013, 08:01
- my favorite amplifier: Ampeg
- Completed builds: Veroboards builds:
Throbak Overdrive Boost
Wampler Ecstasy
Creepy Fingers Doomidrive
Black Arts Quantum Mystic
Roger Mayer Voodoo Bass
Idiot box Blowerbox
Hudson Sidecar
Pcb builds:
Fulltone 69 (GGG kit)
Russian Big Muff (Musikding kit)
EHX Bassballs (home etched using Topopiccione layout)
BJFE BBOD (home etched, thx FSB)
Triangle Muff (Guitar PCB board)
Deluxe Bass Fuzz (home etched,gausmarkov.net layout)
Clone Theory Chorus (Celeste pcb from lectric-fx)
Cornish G2 (home etch, layout thx FSB)
Shin-Ei FY-2 Ge version (home etched, own layout)
Klon (Aion Refractor pcb)
Mutron Phasor II (home etched, layout thx JohnK)
Sunny-T (pcb by guitar pcb)
Rocket Overdrive (pcb by Pepers' pedals)
Sonomatic Deluxe Tape Delay (pcb by Skidmark)
Black Arts Quantum Mystic (adapted storyboardist layout) - Location: Lausanne, Switzerland
- Has thanked: 36 times
- Been thanked: 110 times
And here are all the pictures:I just traced my Broadcast 24V. I unsoldered all diodes on the power supply board to be sure of the type. I made an true to the original vero layout and measured the voltages on both transistors.
If you have any questions feel free to ask...
Vincent
- teddeeh
- Breadboard Brother
Heres a couple of photos i have found of the dual footswitch.
Sadly no underside but could be worrh an experiment or two in decifering this layout, as wehave the original one to go from and fundamentally they are the same.
Sadly no underside but could be worrh an experiment or two in decifering this layout, as wehave the original one to go from and fundamentally they are the same.
- andy-h-h
- Breadboard Brother
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Can this be built without the transformer? It looks like it's just acting as decoupling / isolation device.
- marshmellow
- Cap Cooler
Yes, you can build it without the transformer. But it's not in the circuit to provide isolation (as drawn it doesn't), it is there to form the sound. In comparison to an overdriven guitar sound, transformer distortion is very subtle, its contribution might be minimal anyway. These little transformers usually also have very limited bandwidth, so to mimic the sound of the original pedal, you will probably have to introduce at the very least some bass cut.