Lovepedal Champ

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Lovepedal Champ

Postby chumbox » 14 Mar 2017, 11:07

Hi All

After years of being on this pedal forum among others, I finally have something to repay the favour. It's not the most technical but I'm pretty sure the Lovepedal Champ hasn't been posted up here yet.

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Q1:2N5088
D1+D2: 1N34A
POT (Volume): B100K
Electro x2: 47uF
C1: 47n?
C2: 0.1uF
R1: 1M
R2: 3.3K
R3: 2.2M
R4: 330ohm
R5: 4.7K
R6: 330ohm

Looks a lot like a Woodrow with a couple of extra resistors. Not sure what is going on with R4 and R6 but someone will probably be able to sketch that out. Sounds better than a Woodrow however, probably due to the diodes. Not a lot of grunt but not bad tone considering.

Enjoy!

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Re: Lovepedal Champ

Postby Belanger88 » 14 Mar 2017, 18:56

LMAO of course it is
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Re: Lovepedal Champ

Postby Dingleberry » 15 Mar 2017, 08:48

I think this could be it.
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Simplify before you amplify.

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Re: Lovepedal Champ

Postby chumbox » 15 Mar 2017, 11:00

Dingleberry wrote:I think this could be it.


I think you've pretty much nailed it Dingleberry except for the 2M2 which from looking at it appears to be the standard Electra / Woodrow deal. I'm thinking it's this. Thanks for your help!

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Re: Lovepedal Champ

Postby Dingleberry » 15 Mar 2017, 17:22

Oh, I totally forgot to draw the 2M2 resistor... Thank's for correction chumbox!

-T
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Re: Lovepedal Champ

Postby HEAD » 15 Mar 2017, 19:01

Is it only me or do the diodes look suspiciously small in package for a Ge 1N34A?
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Re: Lovepedal Champ

Postby The Rotagilla » 15 Mar 2017, 20:39

HEAD wrote:Is it only me or do the diodes look suspiciously small in package for a Ge 1N34A?


I have a bunch of 1N34A's in the same package.
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Re: Lovepedal Champ

Postby chumbox » 16 Mar 2017, 03:24

HEAD wrote:Is it only me or do the diodes look suspiciously small in package for a Ge 1N34A?


Probably a fair comment though since the B100K is listed as 1KB on the board. I feel this board is used for a couple of different Lovepedal designs.

I'll try and work out exactly what the input cap is and then I think we might be able to call this done.
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Re: Lovepedal Champ

Postby Dingleberry » 16 Mar 2017, 06:44

HEAD wrote:Is it only me or do the diodes look suspiciously small in package for a Ge 1N34A?


I thought that too! At first glance they looked very 1N4148 / 1N914 to me and knowing lovepedal,the same board is probably used in multiple designs.
After a bit of googling I found out that at least some chinese suppliers are selling 1N34A's in that kind of (DO-35) package.
Always something to learn.
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Re: Lovepedal Champ

Postby chumbox » 16 Mar 2017, 11:12

Alright pullled it open again and the mystery cap is 22n. I also took a pic of the transistor as I neglected to do that earlier. I can't see any writing on the diodes but I'm pretty confident they are 1N34A by the sound. If everyone is happy with that then I think this is pretty much done? Still enjoying the tones I must say but I'm a one knob, one transistor kind of guy. :D

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Re: Lovepedal Champ

Postby Zokk » 16 Mar 2017, 12:19

Hi

Maybe you can try to measure de diodes with a DMM, if this is in the 650mV range it will be silicon, and if its in the 250mV range it's probably germanium.
However I have some 1N34A in DO35 package but with a green mark for the cathode pin, not black as on the 1N914 or 1N4148.

Anyway thanks for the pictures!

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Re: Lovepedal Champ

Postby HEAD » 16 Mar 2017, 13:03

chumbox wrote:
HEAD wrote:Is it only me or do the diodes look suspiciously small in package for a Ge 1N34A?


Probably a fair comment though since the B100K is listed as 1KB on the board. I feel this board is used for a couple of different Lovepedal designs.

[...].


That was what I was thinking. Most of the LP designs are Electra OD derivates. So the might use the same PCB layout with different components for the different flavor Electras so the labeling must not be congruent with the actually used parts. But I haven't been aware of 1N34A in a DO35 package so far. Only knew there are some 1N60s out there which also came in a DO35 package.
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Re: Lovepedal Champ

Postby chumbox » 17 Mar 2017, 10:37

Zokk wrote:Hi

Maybe you can try to measure de diodes with a DMM, if this is in the 650mV range it will be silicon, and if its in the 250mV range it's probably germanium.
However I have some 1N34A in DO35


Just measured both diodes and got 262mV for one and 245mV for the other. Does this confirm they are germanium?
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Re: Lovepedal Champ

Postby plush » 17 Mar 2017, 11:53

chumbox wrote:
Just measured both diodes and got 262mV for one and 245mV for the other. Does this confirm they are germanium?


No it does not. Schottky diodes have similar voltage drops.

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Re: Lovepedal Champ

Postby storyboardist » 17 Mar 2017, 15:18

My guess would be they're 1N60s.

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Re: Lovepedal Champ

Postby culturejam » 18 Mar 2017, 01:54

storyboardist wrote:My guess would be they're 1N60s.

1N60P, most likely.

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Re: Lovepedal Champ

Postby chumbox » 18 Mar 2017, 08:56

culturejam wrote:
storyboardist wrote:My guess would be they're 1N60s.

1N60P, most likely.


That might explain the similarities in tone to my cranked Speaker Cranker.
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Re: Lovepedal Champ

Postby storyboardist » 22 Mar 2017, 16:42

I drew up a layout for this one. Board mounted pot and should fit in a 1590a.

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