Lovepedal Jubilee

General documentation, gut shot, schematic links, ongoing circuit tracing, deep thoughts ... all about boutique stompboxes.

Lovepedal Jubilee

Postby marshmellow » 04 Feb 2018, 21:40

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.
You do not have the required permissions to view the files attached to this post.

For this message the author marshmellow has received thanks: 5
287m (05 Feb 2018, 13:43), Intripped (05 Feb 2018, 23:07), Manfred (04 Feb 2018, 23:41), Nocentelli (04 Feb 2018, 23:15), twangcat (05 Feb 2018, 01:33)
marshmellow
Resistor Ronker
 
Posts: 435
Joined: 16 Aug 2007, 08:31
Location: Germany
Has thanked: 13 times
Have thanks: 115 times

Re: Lovepedal Jubilee

Postby Motter » 07 Feb 2018, 17:25

That looks a lot like a Mr. Black layout.

For this message the author Motter has received thanks:
p.eat (04 Mar 2018, 20:56)
Motter
Breadboard Brother
 
Posts: 137
Joined: 24 Aug 2012, 19:02
Location: New Orleans
Has thanked: 26 times
Have thanks: 93 times

Re: Lovepedal Jubilee

Postby Boba7 » 10 Feb 2018, 00:10

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

Most definitely
Boba7
 
Posts: 31
Joined: 15 May 2015, 00:05
Has thanked: 0 time
Have thanks: 7 times

Re: Lovepedal Jubilee

Postby calfzilla » 23 Feb 2018, 18:37

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.
calfzilla
 
Posts: 2
Joined: 17 Nov 2010, 23:35
Has thanked: 0 time
Have thanks: 0 time

Re: Lovepedal Jubilee

Postby paulc » 25 Feb 2018, 08:39

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.

For this message the author paulc has received thanks:
Manfred (05 May 2018, 21:11)
paulc
Resistor Ronker
 
Posts: 318
Joined: 08 Nov 2007, 00:42
Has thanked: 2 times
Have thanks: 49 times

Re: Lovepedal Jubilee

Postby Jack Deville » 27 Feb 2018, 08:08

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

For this message the author Jack Deville has received thanks:
paulc (14 Apr 2018, 06:49)
User avatar
Jack Deville
Resistor Ronker
 
Posts: 399
Joined: 02 Apr 2009, 07:21
Location: Portland, OR
Has thanked: 3 times
Have thanks: 87 times

Re: Lovepedal Jubilee

Postby Manfred » 11 Apr 2018, 14:24

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?
Manfred
Cap Cooler
 
Posts: 662
Joined: 05 Apr 2009, 00:42
Has thanked: 950 times
Have thanks: 501 times

Re: Lovepedal Jubilee

Postby marshmellow » 11 Apr 2018, 23:36

Checked my photos, 50k linear is correct.

For this message the author marshmellow has received thanks:
Manfred (12 Apr 2018, 07:38)
marshmellow
Resistor Ronker
 
Posts: 435
Joined: 16 Aug 2007, 08:31
Location: Germany
Has thanked: 13 times
Have thanks: 115 times

Re: Lovepedal Jubilee

Postby Manfred » 12 Apr 2018, 07:45

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.
Manfred
Cap Cooler
 
Posts: 662
Joined: 05 Apr 2009, 00:42
Has thanked: 950 times
Have thanks: 501 times

Re: Lovepedal Jubilee

Postby bc108 » 03 May 2018, 23:17

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: 47
Joined: 04 May 2017, 16:39
Has thanked: 18 times
Have thanks: 1 time

Re: Lovepedal Jubilee

Postby bc108 » 04 May 2018, 19:37

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?
bc108
 
Posts: 47
Joined: 04 May 2017, 16:39
Has thanked: 18 times
Have thanks: 1 time

Re: Lovepedal Jubilee

Postby Manfred » 05 May 2018, 08:43

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.
Manfred
Cap Cooler
 
Posts: 662
Joined: 05 Apr 2009, 00:42
Has thanked: 950 times
Have thanks: 501 times

Re: Lovepedal Jubilee

Postby bc108 » 05 May 2018, 17:09

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?
bc108
 
Posts: 47
Joined: 04 May 2017, 16:39
Has thanked: 18 times
Have thanks: 1 time

Re: Lovepedal Jubilee

Postby Manfred » 05 May 2018, 20:02

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.

For this message the author Manfred has received thanks:
bc108 (05 May 2018, 20:53)
Manfred
Cap Cooler
 
Posts: 662
Joined: 05 Apr 2009, 00:42
Has thanked: 950 times
Have thanks: 501 times

Re: Lovepedal Jubilee

Postby okgb » 05 May 2018, 21:29

Jubilee amps have a dual pot for the bass control in the tone stack , so it differs from the average jcm 800
okgb
Diode Debunker
 
Posts: 770
Joined: 16 Mar 2010, 04:58
Has thanked: 193 times
Have thanks: 41 times


Return to Boutique Stompboxes dissected...

Who is online

Users browsing this forum: Ocular Dawn, Serge75 and 10 guests