|HOME| |DIY FAQ| |GEO FAQ| |Debugging Page| |Links| |Schematics| |Wiki| |Layouts Gallery| |STORE|
|AMPAGE| |GEOFEX| |AMZ|

Welcome, Guest. Please login or register.
Did you miss your activation email?
December 21, 2014, 10:32:48 AM
978068 Posts in 104088 Topics by 33406 Members
Latest Member: FloydPinkman
Home Help Login Register
DIYstompboxes.com  |  DIY Stompboxes  |  Building your own stompbox  |  Wylde OD and MPSA14 0 Members and 1 Guest are viewing this topic. « previous next »
Pages: [1] Go Down Print
Author Topic: Wylde OD and MPSA14  (Read 819 times)
Xavier
Posts: 524


Xavier M.


Wylde OD and MPSA14
« on: February 24, 2006, 02:37:37 AM »

I don't have any of these Darlingtons, so after some research I used a 2n5308, which seems to be a suitable replacement , though I had to twist the collector and base pins, according to the datasheet.

Thing is, it doesn't sound. I've used an audio probe and signal stops as soon as it hits the transistor. I even have de-twisted the pins but still nothing.

So, my problem is clear I think.........is there any other choice? can I use 2 transistors in a darlington configuration as a sub?
Logged
Marcos - Munky
Posts: 2679

Marcos Paulo Baliscei - Brazil


Re: Wylde OD and MPSA14
« Reply #1 on: February 24, 2006, 05:41:48 AM »

Try a high gain transistor. I built mine with a BC549C and it works fine.
Logged
Xavier
Posts: 524


Xavier M.


Re: Wylde OD and MPSA14
« Reply #2 on: February 24, 2006, 05:58:38 AM »

I'll try then , but the gain range of the Darlingtons is way different from any FET, right? isn't that important?

Logged
MartyMart
Posts: 6064


Martin L / Berlin for a while


WWW
Re: Wylde OD and MPSA14
« Reply #3 on: February 24, 2006, 06:34:35 AM »

I'll try then , but the gain range of the Darlingtons is way different from any FET, right? isn't that important?



That's right, the gain is well above 1500 hfe .. !
I used a much more common MPSA13 and it worked a treat Cheesy

MM
Logged

"Success is the ability to go from one failure to another with no loss of enthusiasm"
My Website www.martinlister.com
tungngruv
Posts: 793

Tony B


Re: Wylde OD and MPSA14
« Reply #4 on: February 24, 2006, 09:41:06 AM »

I made one using two 2n5089 wired as a Darlington. It worked fine and sounded great.
Logged
Marcos - Munky
Posts: 2679

Marcos Paulo Baliscei - Brazil


Re: Wylde OD and MPSA14
« Reply #5 on: February 24, 2006, 02:09:53 PM »

I believe it woudn't make a big difference, since the transistor are for a buffer. Give a try with a single high hfe transistor and with a homemade darlington.
Logged
burnt fingers
Posts: 412

ScottF


WWW
Re: Wylde OD and MPSA14
« Reply #6 on: February 24, 2006, 02:52:04 PM »

Does somebody have the schematic for this?  I would love to see it. 
 
Scott
Logged

Rock and Roll does not take a vacation!!

www.rockguitarlife.com
My Music
Marcos - Munky
Posts: 2679

Marcos Paulo Baliscei - Brazil


Re: Wylde OD and MPSA14
« Reply #7 on: February 25, 2006, 06:42:36 AM »

http://server3.uploadit.org/files/Torchy-Wylde_Schematic.jpg
Logged
Pages: [1] Go Up Print 
« previous next »
Jump to: