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Retrograde question

Started by small fish, October 03, 2011, 07:10:07 PM

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small fish

Hi,
I´m building a retrograde at the moment. I recieved a 42TM011, which was also told me to be used in the octavia, as well, as the 42TM022. The 011 has 1,5k primary and 500ohms secondary, the 022 has 600ohms secondary. Does it make a huge difference? ???

well, does it makes a difference at all?

just wondering....
tia
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Recycle your paper, so there are more trees left - to make guitars!

small fish

aaargh, something went completely wrong with my parts...  >:(

I ordered 2N5087 and MPSA18 trannies, instead of the 2N4401.

Can I sub the 2N4401 with 2N2222a? or any others NPNs, that´ll work?
any other combination recommended?

tia
Guitars are made of trees! Paper is made of trees!
Recycle your paper, so there are more trees left - to make guitars!

Haberdasher

I think 2n3904 is a drop in replacement for 2n4401 if you have any.  2n2222 should also be fine just make sure the pins are the same.
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small fish

I just bought some BC337, which seems to be the "european" Versions of the 2N4401 (according to a comparity list - "Heninger-List"). Only difference is the pin orientation, which is turned 180°. I´ll give it a try...

thx for your help, Haberdasher

Guitars are made of trees! Paper is made of trees!
Recycle your paper, so there are more trees left - to make guitars!