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newbie - i need help!!!

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qbobz79

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happy new year to EDAboard and everybody!!!!

i'm completly new to this electronics stuff and need help from u pro's.

i need to get a transformer. on the parts list it is written like this:

10) T1: miniature audio transfomer
200k to 1k ct input

Does any1 know where i can get this? i can't seem to find one anywhere. And how much would one roughly cost?


i need help with this item on the parts list.
4) Q1: tip 31 - what is this? is it a transistor? also, why does the diagram show Q1 and then the letters B,C & E on the connecting lines? what do they stand for?



thanx for any1 that can help.
 

echo47

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It sounds like you are looking at an old audio amplifier construction project. Maybe if you tell us more about the project, someone here can sugget a modern circuit with higher performance and lower-cost easier-to-find parts.

You can buy a transformer something like that from DigiKey, but the specs you give are not sufficient to fully specify a coupling transformer, so beware of potential problems. Search for Tamura MET-01. It costs around $15 US at DigiKey:
https://www.digikey.com/
https://www.tamuracorp.com/clientuploads/pdfs/engineeringdocs/MET-01.pdf

The TIP31 is an old Texas Instruments Power transistor. Other companies make them now. You can buy them from DigiKey:
https://www.onsemi.com/pub/Collateral/TIP31A-D.PDF

B-C-E means base-collector-emitter.
 

Samurai_7

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i know what this boy are making... is making a stun gun... so the transformer that you recomend...is for low power...is danger some person that dont know anything about electronic making one... -.-'
 

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