Lovepedal Jubilee

General documentation, gut shot, schematic links, ongoing circuit tracing, deep thoughts ... all about boutique stompboxes.
Post Reply
marshmellow
Cap Cooler
Posts: 470
Joined: 16 Aug 2007, 08:31
Location: Germany
Has thanked: 16 times
Been thanked: 119 times

Post by marshmellow »

Borrowed this for an afternoon to take a look inside. Yet another 386 circuit, yawn... But it actually doesn't sound too bad over the whole gain range, still nothing to write home about though.

For reference, the Purple Plexi and the Black Magic.
Attachments
Lovepedal Jubilee.pdf
(11.27 KiB) Downloaded 853 times
jubilee_1.JPG
jubilee_2.JPG
jubilee_3.JPG

Motter
Solder Soldier
Posts: 157
Joined: 24 Aug 2012, 19:02
Location: New Orleans
Has thanked: 26 times
Been thanked: 108 times

Post by Motter »

That looks a lot like a Mr. Black layout.

Boba7
Posts: 37
Joined: 15 May 2015, 00:05
Has thanked: 11 times
Been thanked: 10 times

Post by Boba7 »

Motter wrote:That looks a lot like a Mr. Black layout.
Most definitely

calfzilla
Posts: 2
Joined: 17 Nov 2010, 23:35

Post by calfzilla »

Motter wrote:That looks a lot like a Mr. Black layout.
They are quite cozy. Very close....

And LP products seem to break into 7 main categories. possibly 8, but I've never seen a trace for the Toxic Fuzz.

paulc
Resistor Ronker
Posts: 320
Joined: 08 Nov 2007, 00:42
Has thanked: 3 times
Been thanked: 53 times
Contact:

Post by paulc »

calfzilla wrote:
Motter wrote:That looks a lot like a Mr. Black layout.
They are quite cozy. Very close....

And LP products seem to break into 7 main categories. possibly 8, but I've never seen a trace for the Toxic Fuzz.
I didn't know they worked together. I always wanted to work with Jack, but I despise Sean - In my opinion Vertex and Freakish Blues can't hold a candle to that guy's BS. I've got an OD11, grey ghost, Deluxe, Stevie, amp11... They were nice layouts though.

User avatar
Jack Deville
Resistor Ronker
Posts: 401
Joined: 02 Apr 2009, 07:21
Completed builds: too many. too many.
Location: Portland, OR
Has thanked: 2 times
Been thanked: 87 times
Contact:

Post by Jack Deville »

paulc wrote:
calfzilla wrote:
Motter wrote:That looks a lot like a Mr. Black layout.
They are quite cozy. Very close....

And LP products seem to break into 7 main categories. possibly 8, but I've never seen a trace for the Toxic Fuzz.
I didn't know they worked together. I always wanted to work with Jack, but I despise Sean - In my opinion Vertex and Freakish Blues can't hold a candle to that guy's BS. I've got an OD11, grey ghost, Deluxe, Stevie, amp11... They were nice layouts though.
I'm only a phone call away, Paul. :)
I'm a "professional."
Buy my products and make me rich.

www.jackdeville.com

Manfred
Transistor Tuner
Posts: 1119
Joined: 05 Apr 2009, 00:42
Has thanked: 1097 times
Been thanked: 699 times

Post by Manfred »

I have a question about the tone stack.
The tone stack of the Jubilee is the same as in the LP JCM800 circuit except the potentiometer,
the value is 50 Kiloohms insteed 5 Kiloohms and this does surprise me.
Is the potentiometer value right?

marshmellow
Cap Cooler
Posts: 470
Joined: 16 Aug 2007, 08:31
Location: Germany
Has thanked: 16 times
Been thanked: 119 times

Post by marshmellow »

Checked my photos, 50k linear is correct.

Manfred
Transistor Tuner
Posts: 1119
Joined: 05 Apr 2009, 00:42
Has thanked: 1097 times
Been thanked: 699 times

Post by Manfred »

marshmellow wrote:Checked my photos, 50k linear is correct.
Thank you for your efforts.

I was wrong in my post, I meant of course the Lovepedal Purple Plexi.

bc108
Posts: 48
Joined: 04 May 2017, 16:39
my favorite amplifier: BE100
Has thanked: 18 times
Been thanked: 2 times

Post by bc108 »

Love this one! Like the Purple Plexi.
More punch and bass, and more controllable gain (due the input instead the irregular pot to ground).

Question: is not redundant the B50K + 4k7 resistor (=~5k)???
I've ommited the 4k7 and place there a b5k pot.

bc108
Posts: 48
Joined: 04 May 2017, 16:39
my favorite amplifier: BE100
Has thanked: 18 times
Been thanked: 2 times

Post by bc108 »

bc108 wrote:Love this one! Like the Purple Plexi.
More punch and bass, and more controllable gain (due the input instead the irregular pot to ground).

Question: is not redundant the B50K + 4k7 resistor (=~5k)???
I've ommited the 4k7 and place there a b5k pot.
And I'll add another question: which is the 370p cap function?

Manfred
Transistor Tuner
Posts: 1119
Joined: 05 Apr 2009, 00:42
Has thanked: 1097 times
Been thanked: 699 times

Post by Manfred »

And I'll add another question: which is the 370p cap function?
The LM386 circuit has an high gain, and it is therefore even more important to suppress radio frequencies.
The 370p capacitor forms together with internal resistance of the guitar circuit a low pass filter to get that done.

bc108
Posts: 48
Joined: 04 May 2017, 16:39
my favorite amplifier: BE100
Has thanked: 18 times
Been thanked: 2 times

Post by bc108 »

Manfred wrote:
And I'll add another question: which is the 370p cap function?
The LM386 circuit has an high gain, and it is therefore even more important to suppress radio frequencies.
The 370p capacitor forms together with internal resistance of the guitar circuit a low pass filter to get that done.
Thanks Manfred..!
Affect in someway if I place C2 before it?

Manfred
Transistor Tuner
Posts: 1119
Joined: 05 Apr 2009, 00:42
Has thanked: 1097 times
Been thanked: 699 times

Post by Manfred »

Affect in someway if I place C2 before it?
If you place C2 before then C1 is in seriell with it and the total capacitance does not change significant the value of C1, the lowpass filter remains almost the same.
And so I guess that there is no affect in someway.

okgb
Diode Debunker
Posts: 827
Joined: 16 Mar 2010, 04:58
Has thanked: 190 times
Been thanked: 30 times

Post by okgb »

Jubilee amps have a dual pot for the bass control in the tone stack , so it differs from the average jcm 800

Post Reply