JHS Prestige

General documentation, gut shot, schematic links, ongoing circuit tracing, deep thoughts ... all about boutique stompboxes.
Post Reply
User avatar
POTL
Resistor Ronker
Information
Posts: 335
Joined: 26 Sep 2016, 03:11
Has thanked: 58 times
Been thanked: 67 times

Post by POTL »

Hi
Let's try to trace this
This pedal came on a mini mini bomb, which was based on a single JFET transistor
The mini bomb schemaешс is presented below
Sch.png
Inside the pedal there are 3 transistors, one in conjunction with a diode (similar to SHO)
As well 2 transistors in a pair (something similar to mu-amp)
In the Ruby Red & Kilt pedals, a new booster is also being used (which is similar to the components with the Prestige stuffing).
JHS describes this as a 2-stage booster.
Guts
Image
Maybe someone has a Prestige and he will share photos of guts in HD
Link to JHS Kilt, there is HD photo and booster inside
https://www.freestompboxes.org/download/ ... &mode=view

User avatar
POTL
Resistor Ronker
Information
Posts: 335
Joined: 26 Sep 2016, 03:11
Has thanked: 58 times
Been thanked: 67 times

Post by POTL »

Looks Like This
CrackleNOTokay.GIF

User avatar
plush
Cap Cooler
Information
Posts: 641
Joined: 08 Dec 2015, 09:29
Location: Moscow, Evil Russia
Has thanked: 36 times
Been thanked: 172 times

Post by plush »

Nah. Prestige is a clone of Tim Escobedo's Duende jfet boost (not a mosfet version).

More Tim's stuff here: http://www.diale.org/escobedo.html

User avatar
POTL
Resistor Ronker
Information
Posts: 335
Joined: 26 Sep 2016, 03:11
Has thanked: 58 times
Been thanked: 67 times

Post by POTL »

plush wrote:Nah. Prestige is a clone of Tim Escobedo's Duende jfet boost (not a mosfet version).

More Tim's stuff here: http://www.diale.org/escobedo.html
Perhaps you are confusing this with the previous version of the booster, which was called Mini Bomb
In the upper left corner are in the element one this is exactly a transistor, and the second is similar to a diode (although this can also be a transistor).
In the middle of the pedal, the diode resistor and the transistor are responsible for turning on the LED.

But thanks for the link, maybe I'll find something interesting.

User avatar
Nocentelli
Tube Twister
Information
Posts: 2222
Joined: 09 Apr 2009, 07:06
Location: Leeds, UK
Has thanked: 1152 times
Been thanked: 954 times

Post by Nocentelli »

POTL wrote: But thanks for the link, maybe I'll find something interesting.
What's this? I don't think it would pass any signal.
Attachments
Sch.png
modman wrote: Let's hope it's not a hit, because soldering up the same pedal everyday, is a sad life. It's that same ole devilish double bind again...

User avatar
mirosol
Resistor Ronker
Information
Posts: 292
Joined: 11 Mar 2012, 16:15
my favorite amplifier: Been on Bogner for quite some time now.
Completed builds: Over 1000 and counting.
Location: TKU, FI
Has thanked: 192 times
Been thanked: 449 times

Post by mirosol »

Nocentelli wrote:
POTL wrote: But thanks for the link, maybe I'll find something interesting.
What's this? I don't think it would pass any signal.
It won't. You'll end up with a FET that's not working at all and you'll have something like 7,5V DC at the output.

It needs to be like this:
Sch.png
On the other hand, i'd draw this circuit like this:
sch.jpg
...but that's just me.
http://tagboardeffects.blogspot.com/
http://mirosol.kapsi.fi/
"No such thing as innocence" -Iron Chic

User avatar
bbkassel
Information
Posts: 30
Joined: 05 Nov 2010, 18:47
my favorite amplifier: Macht12-Klon, Princeton, Champ
Has thanked: 6 times
Been thanked: 2 times

Post by bbkassel »

Inside view...

Image

User avatar
turbofeedus
Breadboard Brother
Information
Posts: 88
Joined: 17 Feb 2012, 04:08
Has thanked: 41 times
Been thanked: 100 times

Post by turbofeedus »

bbkassel wrote: 14 Nov 2020, 14:22 Inside view...
That's an... interesting grounding method. Yikes.

User avatar
Ben N
Cap Cooler
Information
Posts: 506
Joined: 12 Dec 2008, 03:34
my favorite amplifier: Ampeg J12D Jet
Location: Israel
Has thanked: 192 times
Been thanked: 53 times

Post by Ben N »

turbofeedus wrote: 17 Nov 2020, 04:04
bbkassel wrote: 14 Nov 2020, 14:22 Inside view...
That's an... interesting grounding method. Yikes.
I've done something similar, but with a round solder lug on the end of the wire and a tiny bit of aluminum milled away from the top of the screw hole, so when the enclosure is closed the lug is securely sandwiched between the enclosure and the lid and secured by the screw. Works just fine, especially when the jacks are insulated from the enclosure.

User avatar
roseblood11
Tube Twister
Information
Posts: 1887
Joined: 23 Aug 2008, 14:21
Has thanked: 366 times
Been thanked: 313 times

Post by roseblood11 »

This version looks a bit more complex:
Image

Post Reply