Fulltone '69

[petemoore]

You de mann Luke...!
 I'll let you know how it goes too !!!  
     Thanks for helping out here Luke...We all appreciate...[I know to use all the help I can get ..lol..]have a good one thanks !!!          
                         LIKE OT BUT
 My best buddy [when we lived in Louisiana] was named Luke !!! We used to fix and ride that minibike everyday possible !@!!
 You ever wish you could see and talk to again one of your buddies that you knew he had an understanding like you did

[rx5]

thanks a lot luke....


anybody got technical info bout this C828? is it a high gain?? whats the gain?? is it low noise type??

thanks... :wink:
-

-Ralph

[b_rogers]

i just read that the c828 is a generic replacement like 3904,3906 but it has a different pinout..i wonder if thats why he uses them, so if you try to reverse engineer it, it wont work??

[rx5]

If thats the case, then that C828 has gains of 250 or something...

3904s have gains ranging from 150-250....

cant seem to find the datasheet for C828....


I dunno if its low noise type....

[b_rogers]

i got this from a site on repairing arcade games..

**NOTE!!!  You'll notice that the transistors are labeled as type C828.
C828's are NPN general purpose run of the mill transistors, but they
happen to be packaged differently than the most common transistor.  The
C828's have a lead order of EMITTER, COLLECTOR, BASE, instead of what I think of as "normal" for an NPN transistor, EMITTER, BASE, COLLECTOR.
It's not that one is more normal than another, it's just that I don't
normally see this arrangement of transistor.  I made the mistake of
directly inserting a 2N3904 in place of the C828 and the circuit DID
NOT WORK.  Nothing was harmed, but it doesn't help things any.  So, pay
attention when performing this step, and it will insure that you do
things correctly.  It took me some debugging, but I finally figured out
that the C828's didn't have the same packaging as the 2N3904's, though
I figured out it was easy to make the 2N3904 look like a C828.

[rx5]

b rogers,

thanks for for the pin info but I know its pins a long time ago....

those types have E-C-B pinnings.... even some E-B-C common tranny sometimes have C-B-E but they are ussualy labeled so you dont miss out the correct orientation.....

any info if this C828 tranny a low noise one?

or is this just an ordinary NPN device....


-Ralph

[b_rogers]

thats all  i could find on it..so i wonder if the schem takes that into account?

[rx5]

nah, doesnt matter neways. ...  


Im gonna probably use Ge's for the trannys....

BTW, been doin some FF clones using CS9011/ CS9018 (gains of 80-110) with good results...with some tweaking of the 8.2K and 100K.....

I dunno if these trannys are available in your place....

they are just very common here...but I am REALLY having a hard time with 2N5088, 2N5089,MPSA18,BC549,BC550,BC109C...those are NPN high gain low noise types..... wish they were available locally...


-Ralph

[drew]

I missed the initial rush of mailings - if someone can send me the schematic to spam@toothpastefordinner.com I would be your friend forever!

thanks,


drew
toothpastefordinner.com