Orange Terror Stamp

General documentation, gut shot, schematic links, ongoing circuit tracing, deep thoughts ... all about boutique stompboxes.
Post Reply
User avatar
J0K3RX
Degoop Doctor
Information
Posts: 1051
Joined: 29 Jun 2011, 01:25
Location: US Florida
Has thanked: 315 times
Been thanked: 541 times

Post by J0K3RX »

I picked this up for almost nuthin so, I figured I would do the right thing, bust it open and get some pictures for all the pedal junkies here at FSB... I will try to trace it as I get time but, don't hold your breath... If somebody wants to have a go at it from the pics that's fine with me! If needed I can answer any questions you may have, get some better pics, part values, voltages etc..

This is a cool little box, loud as hell for the size and it's about as heavy as a paper clip!! Sounds damn good also but, it needs a little kick in the nuts from an overdrive to get it chuggin good... and it takes overdrives extremely well! I like it alot actually and it's quite amazing! The poweramp is a TDA7379 which is stereo quad or stereo bridged configurations and it's actually capable of 38 Watts!! That may explain why it's so loud :hmmm: The tube is a 12AX7 and it's operating at low voltage...

Pics at the link below
https://www.dropbox.com/sh/5rwpqk9hglxv ... MSR0a?dl=0


User avatar
culturejam
Old Solderhand
Information
Posts: 4058
Joined: 24 Feb 2008, 05:59
Has thanked: 455 times
Been thanked: 554 times

Post by culturejam »

It's a pretty cool concept. Looking forward to see how they put it all together.

User avatar
J0K3RX
Degoop Doctor
Information
Posts: 1051
Joined: 29 Jun 2011, 01:25
Location: US Florida
Has thanked: 315 times
Been thanked: 541 times

Post by J0K3RX »

Off subject... Just found out that Eddie Van Halen died.. F%$K 2020!!! Worst year probably ever!!!

User avatar
tonyharker
Breadboard Brother
Information
Posts: 55
Joined: 23 Jun 2011, 21:50
Location: United Kingdom
Has thanked: 10 times
Been thanked: 11 times

Post by tonyharker »

What sort of heatsink is on that TDA7379 I wonder.

User avatar
plush
Cap Cooler
Information
Posts: 537
Joined: 08 Dec 2015, 09:29
Location: Moscow, Evil Russia
Has thanked: 33 times
Been thanked: 132 times

Post by plush »

tonyharker wrote: 07 Oct 2020, 10:47 What sort of heatsink is on that TDA7379 I wonder.
I bet it's just screwed to the enclosure.

User avatar
J0K3RX
Degoop Doctor
Information
Posts: 1051
Joined: 29 Jun 2011, 01:25
Location: US Florida
Has thanked: 315 times
Been thanked: 541 times

Post by J0K3RX »

tonyharker wrote: 07 Oct 2020, 10:47 What sort of heatsink is on that TDA7379 I wonder.
Looks kinda like this.. actually, it looks exactly like this.
Attachments
terror_stamp_int_s.jpg

User avatar
J0K3RX
Degoop Doctor
Information
Posts: 1051
Joined: 29 Jun 2011, 01:25
Location: US Florida
Has thanked: 315 times
Been thanked: 541 times

Post by J0K3RX »

When I get a chance I will remove the tube and peel the black protective tape off so we can see the traces hiding underneath..

User avatar
tonyharker
Breadboard Brother
Information
Posts: 55
Joined: 23 Jun 2011, 21:50
Location: United Kingdom
Has thanked: 10 times
Been thanked: 11 times

Post by tonyharker »

I'd like to know how you picked it up for for almost nuthin :)

User avatar
J0K3RX
Degoop Doctor
Information
Posts: 1051
Joined: 29 Jun 2011, 01:25
Location: US Florida
Has thanked: 315 times
Been thanked: 541 times

Post by J0K3RX »

tonyharker wrote: 07 Oct 2020, 15:00 I'd like to know how you picked it up for for almost nuthin :)
Somebody realized that it was just sitting in a box not getting any attention and it was going to continue sitting in a box so... I stole it for $50.

I was just eyeballin this and comparing it to the Micro Terror :hmmm: Looks very similar...

User avatar
Saruman
Degoop Doctor
Information
Posts: 63
Joined: 19 Jun 2009, 17:41
Been thanked: 127 times

Post by Saruman »

It is very interesting to get the scheme! I will follow the topic.

J0K3RX, I will ask you to see how the power supply voltage for TDA7379 is made. Stabilizer, or directly from the 15 volt power supply?
Why TDA7379 (4 channels) if there is TDA7279 (2 channels)? Thanks!

User avatar
Saruman
Degoop Doctor
Information
Posts: 63
Joined: 19 Jun 2009, 17:41
Been thanked: 127 times

Post by Saruman »

Hello everybody! Is there any news on this device?
I am interested schematic of part with TDA7379.

User avatar
J0K3RX
Degoop Doctor
Information
Posts: 1051
Joined: 29 Jun 2011, 01:25
Location: US Florida
Has thanked: 315 times
Been thanked: 541 times

Post by J0K3RX »

Saruman wrote: 10 Jun 2021, 15:56 Hello everybody! Is there any news on this device?
I am interested schematic of part with TDA7379.
It's basically the same as the Micro Terror which uses the STA540.. The TDA7379 and STA540 are identicall as far as I can tell. Looks like it's running in the double bridge configuration using only the left side.
Attachments
uterror.pdf
(77.74 KiB) Downloaded 52 times

User avatar
deltafred
Opamp Operator
Information
Posts: 1593
Joined: 06 Apr 2010, 16:16
Location: England
Has thanked: 569 times
Been thanked: 250 times

Post by deltafred »

With the Micro Terror schematic there is something odd going on around R24 and R25, R24 is shorted out.
Politics is the art of so plucking the goose as to obtain the most feathers with the least squawking. - R.G. 2011
Jeez, she's an ugly bastard, she makes my socks hurt. I hope it's no ones missus here. - Ice-9 2012

User avatar
J0K3RX
Degoop Doctor
Information
Posts: 1051
Joined: 29 Jun 2011, 01:25
Location: US Florida
Has thanked: 315 times
Been thanked: 541 times

Post by J0K3RX »

deltafred wrote: 10 Jun 2021, 21:01 With the Micro Terror schematic there is something odd going on around R24 and R25, R24 is shorted out.
Good Catch.. Not my schematic

From eyerballing the pics of the board "I think" this is correct.
Attachments
Image 1.jpg
Image 1.jpg (11.87 KiB) Viewed 247 times

User avatar
Saruman
Degoop Doctor
Information
Posts: 63
Joined: 19 Jun 2009, 17:41
Been thanked: 127 times

Post by Saruman »

Thanks, guys! That's great! I was only interested in the power amplifier in this device.

Post Reply