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Title: Pulsar transistors
Post by: Kaiowas on February 08, 2004, 04:47:38 PM

In the tonepad's pulsar project the transistors are 2n5088, can i use the 2n3904 instead?

Thanks

Title: Pulsar transistors
Post by: toneless on February 08, 2004, 05:53:40 PM

I think 2N3904 is ok but try BC549 or BC550,too.
Keep in mind that the you may have to reverse the pinouts...

Nick

Title: Pulsar transistors
Post by: bioroids on February 09, 2004, 07:23:59 AM

Hi

2N3904 work great, I used them for this circuit with no problems

Luck!

Miguel

Title: Pulsar transistors
Post by: Mark Hammer on February 09, 2004, 09:52:44 AM

The pulsar uses a transistor as a sort of simulated resistance to ground, exactly the same way transistors are used in the Doctor Q and Baseballs filter sections. Just about any garden variety NPN will work fine there: 2N3904, 2N5088/89, 2N4401, 2N2222, etc.

Title: Pulsar transistors
Post by: Gringo on February 09, 2004, 10:34:21 AM

I used bc549c at first and it worked great, but then i took em out to make an obsidian/highway 89 (haven't decided yet) and rteplaced them with some trannies from a computer monitor.

Anything with a gain over 300 seemed to work just the same. Below that gain the LFO didn't oscillate at all.

Title: Pulsar transistors
Post by: Kaiowas on February 09, 2004, 10:34:54 AM

Hi guys!

Thanks for the info, i just finished the pulsar with 2n3904 (all of them) and it sounds great!!

Thanks.

DIYstompboxes.com

DIY Stompboxes => Building your own stompbox => Topic started by: Kaiowas on February 08, 2004, 04:47:38 PM