Boss - HM-3 Hyper Metal [schematic]
- DimebuGG
- Solder Soldier
Information
I got a Boss Hyper Metal HM-3 for repair. While I was looking for a schematic online, all of them are just mere drawings of HM-2, therefore I decided to trace the unit...
Finch: A witty saying proves nothing - Voltaire
Stifler: Suck my dick - Ron Jeremy
Stifler: Suck my dick - Ron Jeremy
- RnFR
- Old Solderhand
Information
split topic for clarity.
look, no crossover diodes! i guess it's not a HM2 after all. thanks for the trace.
look, no crossover diodes! i guess it's not a HM2 after all. thanks for the trace.
"You've converted me to Cubic thinking. Where do I sign up for the newsletter? I need to learn more about how I can break free from ONEism Death Math." - Soulsonic
Blog-APOCALYPSE AUDIO
Blog-APOCALYPSE AUDIO
- DimebuGG
- Solder Soldier
Information
Ooops, I found some error. The 47K biasing resistor in the first opamp should go to V/2 not to ground. Sorry.
Finch: A witty saying proves nothing - Voltaire
Stifler: Suck my dick - Ron Jeremy
Stifler: Suck my dick - Ron Jeremy
- RnFR
- Old Solderhand
Information
that's ok, i labeled it as unverified, so we can leave it up until you hash out the final version.
"You've converted me to Cubic thinking. Where do I sign up for the newsletter? I need to learn more about how I can break free from ONEism Death Math." - Soulsonic
Blog-APOCALYPSE AUDIO
Blog-APOCALYPSE AUDIO
- DimebuGG
- Solder Soldier
Information
Yeah, I'll redraw it again once and include the pcb part numbers.
Finch: A witty saying proves nothing - Voltaire
Stifler: Suck my dick - Ron Jeremy
Stifler: Suck my dick - Ron Jeremy
- DimebuGG
- Solder Soldier
Information
This should be the final schematic with PCB part numbers..
- Attachments
-
- Boss Hyper Metal HM-3.pdf
- (22.75 KiB) Downloaded 1269 times
Finch: A witty saying proves nothing - Voltaire
Stifler: Suck my dick - Ron Jeremy
Stifler: Suck my dick - Ron Jeremy
- DimebuGG
- Solder Soldier
Information
Modifications I've made with the pedal:
- Lift one leg of or remove D2, D3, and D4.
- Lift one leg of or remove C31.
BTW, I changed the opamps to a TL074. Stock opamps got busted.
- Lift one leg of or remove D2, D3, and D4.
- Lift one leg of or remove C31.
BTW, I changed the opamps to a TL074. Stock opamps got busted.
Finch: A witty saying proves nothing - Voltaire
Stifler: Suck my dick - Ron Jeremy
Stifler: Suck my dick - Ron Jeremy
- GodSaveMetal
- Resistor Ronker
I´m cloning these pedal please some gutshots of it!! the layout and PCB; thanks a lot!rs wrote:I can provide some gutshots if you like.
- mozwell
- Breadboard Brother
- GodSaveMetal
- Resistor Ronker
Well I note the tone stack are with ICs; in the HM-3 the tome stack is transistorizer!!! the HM-2 is with ICs!!! is it OK? or I´m wrong???mozwell wrote:axe & you shall receive
Her´s a photo o the guts of a HM-3 and a original layout and scheme BOSS HM-3:
- Attachments
-
- BossHM3.pdf
- here is the original BOSS scheme plus layout
- (280.81 KiB) Downloaded 564 times
-
- Hm-3 GUTS
- 20100825164319eab.jpg (99.28 KiB) Viewed 5452 times
Correct.GodSaveMetal wrote:Well I note the tone stack are with ICs; in the HM-3 the tome stack is transistorizer!!! the HM-2 is with ICs!!! is it OK? or I´m wrong???mozwell wrote:axe & you shall receive
- GodSaveMetal
- Resistor Ronker
Hi DimebuGG, thanks for the info, and sorry for my poor English.DimebuGG wrote:Modifications I've made with the pedal:
- Lift one leg of or remove D2, D3, and D4.
- Lift one leg of or remove C31.
BTW, I changed the opamps to a TL074. Stock opamps got busted.
How do the sound improve modifying these components?
- GodSaveMetal
- Resistor Ronker
Well here again I FINISH THIS ONE!!
I replace the diodes S5500G for a 1N3007, the diodes 1SS133 for the 1N914; the FETS 2SK184 and 2SK118 for the 2SK30A; the 2SC3378 for the 2SC2240; finaly the ICs M5218AL for the NJM4558L; this replaces are recomended by the BOSS team; and really sounds better than HM-2 more mids frecuencies, more EQ control, surprising, the tone stacks is from tranies!! not from a IC like the HM-2!! fantastic!! I´ve to made his BOSS case this days, like my BOSS HM-2 clone!!!
SALUTIS FROM PERÚ!!!
I replace the diodes S5500G for a 1N3007, the diodes 1SS133 for the 1N914; the FETS 2SK184 and 2SK118 for the 2SK30A; the 2SC3378 for the 2SC2240; finaly the ICs M5218AL for the NJM4558L; this replaces are recomended by the BOSS team; and really sounds better than HM-2 more mids frecuencies, more EQ control, surprising, the tone stacks is from tranies!! not from a IC like the HM-2!! fantastic!! I´ve to made his BOSS case this days, like my BOSS HM-2 clone!!!
SALUTIS FROM PERÚ!!!
Hi.. I'm new (for posting) here..
By the way, I thought there's a transistor bypass circuit in every Boss pedals, can I remove it easily by removing all the FETs and also anything between their 'gate' except the Input buffer?
and, is it possible to change the input buffer with BS170 preamp?
By the way, I thought there's a transistor bypass circuit in every Boss pedals, can I remove it easily by removing all the FETs and also anything between their 'gate' except the Input buffer?
and, is it possible to change the input buffer with BS170 preamp?
- GodSaveMetal
- Resistor Ronker
WhY remove the SEND-RETURN IS amazing; the best of the BEAST!!!!!!!!!!!M0zhe3z wrote:Hi.. I'm new (for posting) here..
By the way, I thought there's a transistor bypass circuit in every Boss pedals, can I remove it easily by removing all the FETs and also anything between their 'gate' except the Input buffer?
and, is it possible to change the input buffer with BS170 preamp?
Change the switch with a industrial ones and it´s for the ETERNITY!!!!!!!!
- GodSaveMetal
- Resistor Ronker
Here new photos of the HM-3 I´m clonning yet:
In his BOSS case.
Lateral view.
with his cloned brother HM-2.
In the next year I paint black the HM-3 and made similar brillant finish like the HM-2, stay tuned!!!!
In his BOSS case.
Lateral view.
with his cloned brother HM-2.
In the next year I paint black the HM-3 and made similar brillant finish like the HM-2, stay tuned!!!!
- Greenmachine
- Cap Cooler
Information
- Posts: 616
- Joined: 31 Aug 2008, 17:59
- my favorite amplifier: Fender Blackface Deluxe Reverb
- Completed builds: Electra Distortion
Roger Mayer Octavia
Klon Centaur (Bajaman/Soulsonic)
DOD 440 Envelope Filter
MXR Phase 90
DOD FET Preamp
Dallas Arbiter Fuzz Face
Soulsonic Hunny Bunny Overdrive
BYOC Analog Delay
Craig Anderton Headphone Amp
Anderton Mini Amp
Bajaman Real Tube Overdrive
Fender Deluxe 5E3 with Tone Stack Mod.
Fender Princeton 5F2-a
Keen Neovibe
Aquapuss Delay
Anderton AMS-100 Guitar Synth (abandoned)
DOD 280 Compressor
Weird Sound Generator
Beavis Audio Noisy Cricket
80's Rat
ROG Thor
Big Muff
Green Ringer
Shin-Ei Fuzz
MXR Dynacomp
COT50
Really Cheap Compressor - Location: Jersey City, NJ
- Has thanked: 87 times
- Been thanked: 17 times
- Contact:
You're hardcore man!
"[Y]ou want sketchy, dude? I breadboard on a door." -- RnFR, 2011
"This amp is freakin loud, like crazy, I'm going to kill pets loud." -- mich, 2011
"This amp is freakin loud, like crazy, I'm going to kill pets loud." -- mich, 2011
- GodSaveMetal
- Resistor Ronker
Greenmachine wrote:You're hardcore man!
OHHH!!! GOODNESS I don´t know what it means?????