FUZZ FACE JACKS ANF TRANSISTORS HELP!

Started by teddypicker15, July 20, 2010, 12:30:42 AM

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teddypicker15

HEY I HAVE THIS DIAGRAM





and these are the jacks i have




also how di i identify the E C and B con a transistor


hope you can help me

Bad Chizzle

First, you need to find the data sheet for the transistors you have. Google them. They will tell you the pinouts(where ECB are) for your transistors.
Then, with a meter, find out what each connection on your jacks are. I haven't used those so I can't tell you what is what, but they look pretty straight forward to me. Aslo, I believe if you search this site, you will find basic learning material that can be read before you start building. Pretty sure these things will explain enough to answer any question you may want answered. Hope I've helped you.Good luck!
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petemoore

#2
  Economy DMMs come with an 'hfe Checker'. By stuffing the transistor into the lugs every way [the lugs are usually EBCE or something like that, to fascilitate insertion of various pinout transistors without having to bend/reverse two of the transistor leads].
  Stick it in the socket until a 'ballpark' Hfe reading pops up in the screen, note the correct pinout markings on the DMM socket for that transistor...stuck in with the right pinout, a reading like '214' or '483' [hfe] will appear.
  The phono jack with 2 lugs is  Tip/Sleeve [mono 1/4'' phono jack], simple 2 conductor.
 The jack with 3 lugs is probably TRS [the ring in the middle], and can be used in many different ways.
 the input jack power defeat uses the insulated lug/contacts of a stereo 1/4'' phono jack.
 To turn the power on a Mono 1/4'' phono plug is insterted in the Stereo 1/4'' phono jack.
 Power travels through the Ring of jack / sleeve of plug / to the sleeve of the jack, the Jack Sleeve/ring connection is broken when the plug sleeve no longer connects the two [R/S] contacts of the jack.
Convention creates following, following creates convention.

jasperoosthoek

Be aware that just occasionally the cheap DMM says the transistor has a very low gain if it is connected backwards (Only for CBE transistors because the base is in the middle).
Of course, if you put it in the socket correctly it will give you the correct much higher value. This is because transistors can be "somewhat" symmetrical. Reversing NPN yields...

Hmm, anyone ever utilized this in a fuzz box? Having a transistor wired backwards?
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