Pittsburgh Modular Envelope - Question about Resistor Value

From circuitbending to homebrew stompboxes & synths, keep the DIY spirit alive!

Moderators: lisa, luketeaford, Kent, Joe.

Post Reply
Treibstoff
Learning to Wiggle
Posts: 13
Joined: Sun Mar 24, 2019 7:06 am

Pittsburgh Modular Envelope - Question about Resistor Value

Post by Treibstoff » Thu Feb 06, 2020 11:13 pm

Hey ! I need help repairing my PITTSBURGH MODULAR envelope module. i have burned R47 and R49 and need the values of them because they are not readable anymore. Can some one help me out with a picture or the values itself? Thanks!
IMG_20200206_222505~2.jpg
You do not have the required permissions to view the files attached to this post.

nigel
Veteran Wiggler
Posts: 619
Joined: Wed Jan 16, 2013 6:49 am
Location: Melbourne, Australia

Re: Pittsburgh Modular Envelope - Question about Resistor Value

Post by nigel » Fri Feb 07, 2020 12:46 am

Treibstoff wrote:
Thu Feb 06, 2020 11:13 pm
Hey ! I need help repairing my PITTSBURGH MODULAR envelope module. i have burned R47 and R49 and need the values of them because they are not readable anymore. Can some one help me out with a picture or the values itself? Thanks!IMG_20200206_222505~2.jpg
From their position on the board I would guess that they are 10 ohm protection resistors. The important question is, do you know why you burned them? If not, any replacements will probably do exactly the same.

Treibstoff
Learning to Wiggle
Posts: 13
Joined: Sun Mar 24, 2019 7:06 am

Re: Pittsburgh Modular Envelope - Question about Resistor Value

Post by Treibstoff » Fri Feb 07, 2020 12:59 am

Yep i have accidently chosen the wrong power plug direction. I want to resolder the Resistors and have ordered the 3 ICs just in case they are broken too

User avatar
MacroDX
Common Wiggler
Posts: 162
Joined: Tue Sep 11, 2012 1:03 pm

Re: Pittsburgh Modular Envelope - Question about Resistor Value

Post by MacroDX » Fri Feb 07, 2020 8:58 am

nigel wrote:
Fri Feb 07, 2020 12:46 am
If not, any replacements will probably do exactly the same.
Maybe, maybe not. The protection resistors on my Pittsburgh Filter already died twice on me and I asure I did nothing wrong. Replaced them, put module back in with the cable exactly as it was before, all fine.
My Modular Music is just Bleeps and Bloops!

soundcloud: http://www.soundcloud.com/macrodx
bandcamp: http://macrodx.bandcamp.com
vimeo: http://vimeo.com/macrodx

User avatar
Soy Sos
Dub Surgeon
Posts: 4500
Joined: Thu Apr 03, 2008 9:38 am
Location: Pittsburgh, PA USA

Re: Pittsburgh Modular Envelope - Question about Resistor Value

Post by Soy Sos » Fri Feb 07, 2020 10:00 am

Go ahead and send Pitt Mod a note.
They'll be sure to send you the info.

Treibstoff
Learning to Wiggle
Posts: 13
Joined: Sun Mar 24, 2019 7:06 am

Re: Pittsburgh Modular Envelope - Question about Resistor Value

Post by Treibstoff » Fri Feb 07, 2020 11:16 am

I have replaced both resistors with 10 Ohm ones and module works fine again. Thank you very much !! :tu:

Treibstoff
Learning to Wiggle
Posts: 13
Joined: Sun Mar 24, 2019 7:06 am

Re: Pittsburgh Modular Envelope - Question about Resistor Value

Post by Treibstoff » Fri Feb 07, 2020 12:24 pm

Soy Sos wrote:
Fri Feb 07, 2020 10:00 am
Go ahead and send Pitt Mod a note.
They'll be sure to send you the info.
MacroDX wrote:
Fri Feb 07, 2020 8:58 am
nigel wrote:
Fri Feb 07, 2020 12:46 am
If not, any replacements will probably do exactly the same.
Maybe, maybe not. The protection resistors on my Pittsburgh Filter already died twice on me and I asure I did nothing wrong. Replaced them, put module back in with the cable exactly as it was before, all fine.
nigel wrote:
Fri Feb 07, 2020 12:46 am
Treibstoff wrote:
Thu Feb 06, 2020 11:13 pm
Hey ! I need help repairing my PITTSBURGH MODULAR envelope module. i have burned R47 and R49 and need the values of them because they are not readable anymore. Can some one help me out with a picture or the values itself? Thanks!IMG_20200206_222505~2.jpg
From their position on the board I would guess that they are 10 ohm protection resistors. The important question is, do you know why you burned them? If not, any replacements will probably do exactly the same.

Just for the Case someone will get the same trouble ..
here is the answer from Pittsburgh Modular :

Those two resistors (R47, R49) are in place specifically to protect the rest of the circuitry from harm. They basically act like fuses in the case of reversed polarity or a power surge.
They are rated at 10 ohms, 1/8 watt. In theory, if they did their job, the rest of the circuitry should be fine

Post Reply

Return to “Music Tech DIY”