Lovepedal - Vibe/Magicboy [traced]
- Manfred
- Tube Twister
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Here the traced schematic, the revised PCB layout will follow later.
Last edited by Manfred on 01 Nov 2021, 08:47, edited 1 time in total.
- Manfred
- Tube Twister
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The type 1N5230 for the diode D1 is only an assumption of me it could be also a 1N5231 with Uz = 5.1V.
Can you measure the voltage at the diode? Ready to print PDF files: SprintLayout6 file:
Can you measure the voltage at the diode? Ready to print PDF files: SprintLayout6 file:
Last edited by Manfred on 31 Oct 2021, 23:54, edited 2 times in total.
- Manfred
- Tube Twister
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Thanks for the closer look and the hints.
I overlooked the 10k resistor because there are no solder pads for it.
Four eyes see more than two.
I also changed the resistor R13 to 1 Megohm.
I have replaced all the documents in the post above with the revised ones.
- DjPsychic
- Breadboard Brother
Oops that would be my fault! First time trace
I measure 4v @ the diode
- Intripped
- Cap Cooler
So, these are the main differences from the MXR Phase 45:
MXR / LOVEPEDAL
R4 10K / 22K
C2 50n / 10n
C3 50n / 100n
C5 50n / 100n
C7 50n / 150n
BIAS trim 250K / 50K
SPEED C(B) 500K / B 100K
out resistor* 150k / (missing)
*out resistor to ground
MXR / LOVEPEDAL
R4 10K / 22K
C2 50n / 10n
C3 50n / 100n
C5 50n / 100n
C7 50n / 150n
BIAS trim 250K / 50K
SPEED C(B) 500K / B 100K
out resistor* 150k / (missing)
*out resistor to ground
- Intripped
- Cap Cooler
actually the BIAS trim should be 250K, not 50K. i think there's a little error in your schematic, Manfred.
and still seems strange to me that there isn't any resitor to ground on the output; could be an off-board component, maybe?
and still seems strange to me that there isn't any resitor to ground on the output; could be an off-board component, maybe?
- Intripped
- Cap Cooler
- DjPsychic
- Breadboard Brother
Looking at the MXR Phase 45 schematic I’m seeing 47n not 50n for those cap values. Are you rounding up?
- Intripped
- Cap Cooler
I looked at one schematic I downloaded from... I don't remember, and it had these values.
Anyway, it doesn't make any difference, considering capacitors tolerances.
PS: It was a schematic from ampage.org, that I downloaded from elektrotanya
Anyway, it doesn't make any difference, considering capacitors tolerances.
PS: It was a schematic from ampage.org, that I downloaded from elektrotanya
- Manfred
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Thanks, you are right!
I have cut the reworked image of the component side for my template to the size of the board and cut off the "2" at the value.
Here are the revised documents. Ready to print PDF-files: SprintLayout 6.0 file:
- DjPsychic
- Breadboard Brother
Finally got another chance to look at the project. Just a note, the numbers on the MXR schematic don’t match the the Lovepedal numbers you’ve listed here. I’m looking at the schematic GGG btw
http://www.generalguitargadgets.com/pdf/ggg_p45_sc.pdf
Trying to figure out which parts I need to swap on the phase 45 I already built. Trying to avoid building again
http://tagboardeffects.blogspot.com/201 ... se-45.html
- DjPsychic
- Breadboard Brother
Finally got another chance to look at the project. Just a note, the numbers on the MXR schematic don’t match the the Lovepedal numbers you’ve listed here. I’m looking at the schematic GGG btw
http://www.generalguitargadgets.com/pdf/ggg_p45_sc.pdf