Moderator: Ghost Hip
multi_s wrote:i think the base current actually is limited by the 1k on the emitter side. without thinking too hard you can see that the current is limited to worst case (Vcc-Vbe)/1K < 10mA, less than 10% of max Ib for a run of the mill 2n3904.
looks safe to me?
s
oldangelmidnight wrote:This is the classic ILF I love. Emotional highs and lows. Scooped mids in my heart all day long.
Jero wrote:Eric was here just a couple months ago, and sold some Wolfs via Ebay
eatyourguitar wrote:multi_s wrote:i think the base current actually is limited by the 1k on the emitter side. without thinking too hard you can see that the current is limited to worst case (Vcc-Vbe)/1K < 10mA, less than 10% of max Ib for a run of the mill 2n3904.
looks safe to me?
s
what did you get for Vbe? most datasheets say Vbe > 5v = you pooped your pants go buy another 2N3904. I know this depends completely on thermal dissipation of the delicate BE junction and this depends again on Ice which we can see is limited by 1K + 10K. but it is my understanding that the 5v rule is more likely followed in some way most of the time and people may accidentally be putting ESD protection into the design of many transistor circuits. the texas instruments book I have on transistors was pretty paranoid about this stuff. probably because of the potential applications it was intended for are much more critical than the toys we build with them.
eatyourguitar wrote:Jero wrote:Eric was here just a couple months ago, and sold some Wolfs via Ebay
do you have a link to the ebay? I could not find a mellowtone website anywhere. I searched all the forums and never found anything from him or mentioning him in 2016. there were threads on ILF where the moderators are saying he stole money and never delivered the pedals. I thought he was shamed and never to return to ILF. was ebay his only appearance? I am also not selling a 4 knob wolf computer so I might just do it anyway. I would respect his original circuit if he is still selling pedals. I know the rules.
eatyourguitar wrote:I see it now in the datasheet it is reverse breakdown voltage -6v for fairchild 2N3904. the datasheet here has it listed as 6v not -6v but I do understand it is actually saying -6v Vbe will destroy the 2N3904 now that you explained it to me. it makes sense when you consider it says breakdown (not forward) voltage.
http://www.mouser.com/ds/2/149/2N3904-82270.pdf
veteransdaypoppy wrote:I have one of these deluxe guys from years ago:
It's been on my board forever. I'm thinking of building a clone though, so
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