[Fred_fred2004]

OK maybe a trace of sarcasm

just having a bit of fun

the thruth is freezing the strip board in the freezer made no difference - and I had such high hopes

Oh well back to fitting a B22 into an Altoids tin

cheers
FRED

 

[scompton]

I assume you've seen oneplustwo's B22 in a cookie tin

bonnie & jason » Beta 22 amplifier build

 

[Fred_fred2004]

Yes it was brilliant, nice to see an amp that cost more than the case

 

[Billy213]

Fred would you be able to do me a diagram to show how I would connect up my 6 pin 1/4 headphone output jack? I'm really struggling to find out how it should be connected.

http://www.maplin.co.uk/Module.aspx?ModuleNo=982

That's what I have. The rest of my layout matches yours. I hope I've got my pot wiring right, only time will tell.

 

[Fred_fred2004]

Hi Billy

Gnd goes to gnd
ring is right goes to pin 7 of the chip
Tip is left goes to pin 1 of the chip

ignore the other three pins they are switchable

cheers
FRED

 

[igotyofire]

Quote:

Originally Posted by Billy213 /img/forum/go_quote.gif Fred would you be able to do me a diagram to show how I would connect up my 6 pin 1/4 headphone output jack? I'm really struggling to find out how it should be connected. 1/4†Stereo Socket with Chrome Bezel : 6.35mm (1/4 Inch) Stereo Jacks : Maplin That's what I have. The rest of my layout matches yours. I hope I've got my pot wiring right, only time will tell.

i really like how tanget recommends toning them, then any plug u ecounter will be easy.....just plug up a male to male interconnect cable to jack. in yourcase an adapter to the 3.5mm might make things easier, since ive never seen a 1/4 male to male....anywho then touch the different parts of the male tip....ground,right chanel, left channel(right) with a multi-meter to the tips of the jack connection to figure out which goes where in your circuit.

 

[mrtndoog]

Fred, can I get all the parts from Jaycars so I can try this over the Christmas break, I' haveing a little crisis deciding what I need
thanks

 

[Fred_fred2004]

Jaycars are fine they don't have pots with switches so seperate pot and switch


CAT. NO. ZL3972 OPA2134 opamp (its all they have)
CAT. NO. RP8756 10K Log double gange pot
CAT. NO. RM7165 0.47uF 100V MKT capacitor (2)
CAT. NO. PS0132 3.5mm skt (2) better for air wireing
CAT. NO. RE6314 470uF low esr 16Volt (2)
CAT. NO. PH9233 battery clip
CAT. NO. ZD0150 red led
CAT. NO. ST0335 toggle switch
CAT. NO. PI6452 8pin IC socket



metal film resistors 1/2watt

10K (2)
1K (2)
100k (2)
4.7K (2)
6.8K for led

chunk of strip board and some solder (60/40)


Hope that helps
cheers
FRED

 

[Billy213]

Fred I've completed mine but it's not working properly. I've got sound from the right channel and a very faint sound from the left. It also distorts when I turn up the volume. Any ideas?

 

[Fred_fred2004]

Yes its broken

Sorry couldn't resist

The circuit works so you've proberbly made a simple mistake its easy to do, any chance of a picture or two

cheers
FRED

 

[Billy213]

Yeah I'll upload a couple when I get home from work tonight. Gonna 'borrow' their soldering iron for a while as well. A rather hot 120W 110v one, works rather nicely.

Only problem with mine is the wire I've used, can get in the way a bit.. Oh, and it doesnt have an on/off switch.

 

[Billy213]

 

[Fred_fred2004]

Get a old toothbrush or similar, dip it in meths and scrube the bottom of the board blot it up with a tissue. then have a good look for shorts between the traces

 

[Fred_fred2004]

Just thought , how is the input connected to the pot, its hidden in the pics

 

[diff_lock2]

I spent some time working on a strip board cmoy, the input caps are off the board and it uses some TLE chip for rail splitting (tangentsoft). You can really make a compact cmoy with stripboard.