Acoustic 360+ fuzz transistor?

[sfr]

Anyone know of a source for the 2n1306 transistor in J.C.'s Acoustic 360+ preamp?  Or any recommendations of where to start with a substitution?

[troubledtom]

were is the schemo?
        - tom

[analogguru]

2N 1306 :  Ge-NPN  25V/300mA/150mW   ß: 60-300/10mA   F=3dB  ft>10MHz

try: AC 127

Happy X-Mas,
analogguru

[MarkB]

Tom..
all the stuff you need/want to know about the 360 is here!
http://www.lynx.bc.ca/~jc/pedals360.html
That's been on my short-list of things to build... need to get my butt in gear.
"-)

[moosapotamus]

NTE101 will work.

~ Charlie

[troubledtom]

Tom..
all the stuff you need/want to know about the 360 is here!
http://www.lynx.bc.ca/~jc/pedals360.html
That's been on my short-list of things to build... need to get my butt in gear.
"-)

thanx, i've never seen the schemo on the site , just cool info...in the past
                peace,
                    -tom

[LP Hovercraft]

I built one offa Moosapotamus' layout and the preamp sound is monstrous.  -Think John Paul Jones "Heartbreaker" tone.  Even with the suggested 2N1360, I really had to mellow that fuzz out-the fuzz cut out too much bottom and was really harsh & farty at some settings.  I liked the sound of even a 2N2222 better-was mellower.  I finally ended up putting a .022 mF cap around lug 1 and 3 of the "fuzz" pot.  Mellower highs but still not perfect.  It would be really cool if this fuzz was modified to accept a JFET as the clipper.  I haven't been doing this long enough to know how, though.  Larry Graham loved using that fuzz, though and it does sound quite similar to the Sly and the Family Stone recordings.

[moosapotamus]

Another cool add-on for the fuzz is a wet/dry blend control. :cool:

~ Charlie

[Eb7+9]

It would be really cool if this fuzz was modified to accept a JFET as the clipper.  I haven't been doing this long enough to know how, though.  

... that's an  interesting idea, I'm gonna try that ... I recently optimized the 360+ signal path to run very clean on 9volts of supply (simply by re-biasing a pair of "straight" gain stages and compensating with the output op-amp) ... I found that getting the fuzz section to work perfect in the 360+ comes down to device pairing ... I know it's doable using the stock component values and running at 15-24 volts ... I still have yet to do the fuzz testing in the 9volt realms although I've had reports that the fuzz can sound good even then ...

... the "ATTACK" control mixes between single-sided (ie. half clipping) and full two-sided clipped waveforms ... the silicon device chops off one side of the input waveform and the germanium device chops off the other ... the chopping levels can be alterred by varying the collector loads, something I haven't experimented with too much ... replacing the collector loads in the fuzz by trimpots might be a worthwile idea if fuzz contour adjustment is desired ... I tend to leave the circuit stock and try various device combinations until I get what I'm looking for (a stock 360 fuzz sound) ... sometimes I will customize the feeds to the mixing ATTACK pot for a different sound ...

... you may have to select from a batch of Germanium devices to get good clipping from the 360 fuzz section ... the NPN Silicon device preceding the 2n1306, will affect the clipping quality of the fuzz overall - any high gain transistor should do and lot selection is much less critical - I used 2n5210's with pretty good results and plan on trying it with higher gain 2n5089's or the like ... I'd like to hear from anyone who finds alternate combos that sound great ...

... all the best !!

jcm~

[Eb7+9]

Another cool add-on for the fuzz is a wet/dry blend control. :cool:

~ Charlie

... very HIP Charlie !! ...   :wink: