Print Page - noobs parts question

Title: noobs parts question
Post by: mat on March 29, 2005, 10:38:28 AM

Hi,

I saved about 50 of the 'one directional communication devices' (well, dont know exact word for that) they are kind of very old desk phones that I spotted some parts inside.

So I would like to know if they are of any use on pedal building ?

2N5115 -googled that this is a p-channel jfet might try on boosters or overdrives. It looks like germanium transistor.

BC307B

LM324N

LM389N

CD4015BE

CD4013BE

CD4049UBE

MC14021BCP

and finally small six legged transformers that say: 300ohm/600ohm 100mW

thanks,
mat

Title: Re: noobs parts question
Post by: Paul Perry (Frostwave) on March 29, 2005, 06:23:20 PM

BC307B
PNP silicon

LM324N
common foolproof quas op amp

LM389N
very interesting discontinued lowish power amp with separate transistors on the same die, the old Nationals app books had ingenious circuits usign these

CD4049UBE
think this is in the 'double D' distortion at ROG?

and finally small six legged transformers that say: 300ohm/600ohm 100mW
If you are lucky, might be in wah inductor range.
Or you could use in a ring modulator, possibly.
Or in one of those old single transistor audio oscillators.

thanks,
mat[/quote]

Title: noobs parts question
Post by: niftydog on March 29, 2005, 06:32:51 PM

Just for the sake of completeness...

CD4015BE CMOS Dual 4 stage static shift register

CD4013BE CMOS Dual D flip flop

MC14021BCP 8 bit static shift register

None particularly useful for stompboxes... unless you're into using obsolete components for digital circuits.

Title: noobs parts question
Post by: R.G. on March 29, 2005, 10:23:59 PM

QuoteCD4015BE CMOS Dual 4 stage static shift register
MC14021BCP 8 bit static shift register

Useful for building pink noise generators.

QuoteCD4013BE CMOS Dual D flip flop

This chip is used in almost all octave-down generators ( example: the MXR Blue Box) and in many other applications where you want to latch one state or the other (See: "A Remote Indicating Footswitching System" at GEO).

Title: noobs parts question
Post by: Peter Snowberg on March 29, 2005, 11:04:50 PM

for the final one.... the 2N5115 is a p-channel JFET that is unfortunatly not very sensative. Vgs=3 to 6V. For a J201 it's more like .3 to 1.5V.

They're low gain, but if you drive the hell out of them you may have something. :D

Title: noobs parts question
Post by: mat on March 30, 2005, 04:02:48 AM

Ok,

2N5115 - not sensitive enough :evil:

BC307B - pnp silicon (general purpose transistor ?) :twisted:

LM324N - might try to develop an overdrive around this :idea: :shock: :?:

LM389N - ROG Ruby :?:

CD4015BE - pink noise generators :?:

CD4013BE - octave down + remote switching :twisted:

CD4049UBE - ROG Double D :twisted:

MC14021BCP - pink noise generators :?:

300ohm/600ohm 100mW - possible wah inductor :twisted: :twisted:

Thanks to all very much 8) 8) 8) 8)

cheers,
mat

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DIY Stompboxes => Building your own stompbox => Topic started by: mat on March 29, 2005, 10:38:28 AM