Author Topic: Just Started and I have a transitor question...  (Read 8482 times)

6APTAWEB

Just Started and I have a transitor question...
« on: July 23, 2007, 01:28:26 AM »
I bought a pack of transitors from RadioShack...

NPN Type Switching Transistors...

There are 15 in the pack...

I also bought an IC Socket 8 Pin...

Now I dunno what to do...it doesnt seem to be the right part(s). I can't do what it says in the Building Topic.

Please help me.

Thank you,
Steven

Barcode80

Re: Just Started and I have a transitor question...
« Reply #1 on: July 23, 2007, 02:34:54 AM »
if you bought NPN you bought correctly. there should be at least one 2n2222, 2n4401, 2n5088, and/or 2n3904. any of these will work in the circuit. the 8 pin socket is to be trimmed down to 3 pins so you can use it as a transistor socket. you bought correctly, just follow the instructions and you'll be fine.

newfish

Re: Just Started and I have a transitor question...
« Reply #2 on: July 23, 2007, 06:12:03 AM »
For what it's worth - I now have two of these things (one is for a friend) - both with different Trannys.

First is a BC109C (2N2222 equivalent I think?) and is an absolute monster.
Second one has 2N5089 in, and is a little easier to tame.

Might go shopping for more 2N2222s...
Happiness is a warm etchant bath.

6APTAWEB

Re: Just Started and I have a transitor question...
« Reply #3 on: July 23, 2007, 04:09:25 PM »
I tired and it still doesnt work... I don't understand for some reason.

The IC socket I bought is this:
http://www.radioshack.com/product/index.jsp?productId=2062604&cp=&sr=1&origkw=IC+socket&kw=ic+socket&parentPage=search

And I got a 15 Pack of transistors fillied with transistors that have one of the following printed on them:
2N4401 011
2N3904 331
MPS2222A

Barcode80

Re: Just Started and I have a transitor question...
« Reply #4 on: July 23, 2007, 04:32:24 PM »
did you trim down the socket? make sure your transistor is oriented properly. very important. remelt every solder joint.

6APTAWEB

Re: Just Started and I have a transitor question...
« Reply #5 on: July 23, 2007, 04:47:04 PM »
I trimmed it down...it looks nothing like the one in the Build Pictorial and I don't know how the transistor works with the IC socket after being trimmed...

Barcode80

Re: Just Started and I have a transitor question...
« Reply #6 on: July 23, 2007, 05:45:04 PM »
well, you should cut it down to 3 pins. then you solder the socket in place as shown in the pictorial. then just slide the leads into the socket holes. kind of like plugging a lamp into the wall. you just plug them in. if it doesn't work when you put the transistor in, turn the transistor the other direction, then if it doesn't work start debugging.

6APTAWEB

Re: Just Started and I have a transitor question...
« Reply #7 on: July 23, 2007, 07:11:40 PM »
Thats what I thought I should do but the leads from the transistor are closer together then the holes are in the socket.

Barcode80

Re: Just Started and I have a transitor question...
« Reply #8 on: July 23, 2007, 09:19:02 PM »
pull them slightly apart, its okay

newfish

Re: Just Started and I have a transitor question...
« Reply #9 on: July 30, 2007, 11:22:12 AM »
Hmm,

Just bought a couple of different Transistors to try - and a 6-pin socket to trim down.

Looking at the data sheets, first tranny (BC107B) has HFE (DC Gain) values of a maximum 450, second (BC549C) has a whopping 800.

Is this amount of gain likely to break anything (particularly my pre-amp valves)?

Cheers,

Ian.
Happiness is a warm etchant bath.

aron

Re: Just Started and I have a transitor question...
« Reply #10 on: July 30, 2007, 01:13:03 PM »
It should be ok. Unless something's already wrong with your preamp tubes.

newfish

Re: Just Started and I have a transitor question...
« Reply #11 on: July 30, 2007, 04:55:32 PM »
Thanks once again!

BC549C is in place, and sounds *really* sweet!

I may never use my amp's overdrive channel again...

 :o
Happiness is a warm etchant bath.

aron

Re: Just Started and I have a transitor question...
« Reply #12 on: July 31, 2007, 12:26:15 AM »
Wow. I gotta check out that transistor! :-)