Rogue Sound - Savage Henry (DAM related)

neoflox · Post by **neoflox** » 17 Feb 2010, 14:40

Hi,
anyone capable of telling us something about these guts? Blog & Soundclip

(link)

Thanks

neoflox · Post by **neoflox** » 17 Feb 2010, 17:23

D'oh. Sorry for posting a request. I feel really stupid, please move this thread or delete it.

Whoismarykelly · Post by **Whoismarykelly** » 17 Feb 2010, 21:14

Well you have guts and photos so its not really a request.

Its the same layout as a meathead with some different values thrown in for the resistors and caps. At first glance the input cap is much larger than a meathead and the first transistor is definitely different. I have seen zetex mosfets in that package but I dont know if typical BJTs come in that package as well. Try building a meathead and subbing in the values from that picture and see what happens.

neoflox · Post by **neoflox** » 17 Feb 2010, 23:06

Ah, thanks a lot.

Fuzzer · Post by **Fuzzer** » 19 Feb 2010, 01:25

Maybe it's an old transistor, In my Phase 90 the PNP comes in that exact same package, don't know the classifier, though; maybe some manufacturers adopted the TO-92 later.

And I could swear I've seen them in the flip-flop sections of some BOSS pedals, or BOSS knockoffs.

Whoismarykelly · Post by **Whoismarykelly** » 19 Feb 2010, 01:48

Fuzzer wrote:Maybe it's an old transistor, In my Phase 90 the PNP comes in that exact same package, don't know the classifier, though; maybe some manufacturers adopted the TO-92 later.

And I could swear I've seen them in the flip-flop sections of some BOSS pedals, or BOSS knockoffs.

Not sure. That package is called E-Line and and I have seen them in some mass produced effects. Its also the package of the Diodes Inc./Zetex BS170 ZVex uses.

Fuzzer · Post by **Fuzzer** » 19 Feb 2010, 18:15

E-line, yes thanks.I had an old chart where it was described, unfortunately lost it, had forgotten the name.

Still, I'm pretty sure its a BJT.

noelgrassy · Post by **noelgrassy** » 23 Feb 2010, 01:21

Is the black 'skirt' part of the xistor too? I presumed the xistors were inserted into round sockets.

RnFR · Post by **RnFR** » 23 Feb 2010, 01:29

noelgrassy wrote:Is the black 'skirt' part of the xistor too? I presumed the xistors were inserted into round sockets.

no, i think that is some kind of spacer, or possibly a socket.

i'd like to hear what this guy sound like. i just like the ad copy.

maybe i'll draw a schem if i get a chance. there's so much other stuff to do though!

-----

i'm having a hell of a time trying to make out those codes.

neoflox · Post by **neoflox** » 12 Apr 2010, 11:15

Alright, if anyone wants to take a look at this. Maybe guesses for trace cuts and the two missing capacitor values? I'd start experimenting then afterwards.

phibes · Post by **phibes** » 12 Apr 2010, 15:56

Why 1K for the output pot? My guess on that would be 500K. The questioned film cap is probably in the range of .01uF to .1uF and the questioned electrolytic is probably in the range of 4.7uF to 22uF. Breadboard and listen to your ears.

Whoismarykelly · Post by **Whoismarykelly** » 12 Apr 2010, 16:25

Those two lower strips should both be grounded I think. Otherwise that pulldown isn't doing anything and Q1 has no emitter/ground connection.

Post by **azrael** » 12 Apr 2010, 19:28

^Yeah, sticking a jumper between the last two strips would work just fine.

neoflox · Post by **neoflox** » 12 Apr 2010, 20:36

Nice. I'll build it tomorrow and let you know if it works.

phibes · Post by **phibes** » 12 Apr 2010, 21:48

What transistors you gonna use?

neoflox · Post by **neoflox** » 12 Apr 2010, 22:33

Not sure, I'll try some. Any bets what would work?

Whoismarykelly · Post by **Whoismarykelly** » 13 Apr 2010, 07:06

Your Q2 is very likely still a BC182L as you're still going to need an ECB device to fit that layout.

neoflox · Post by **neoflox** » 13 Apr 2010, 12:20

Alright, it works.

Not sure if the last values are identical with the original, but soundwise, it is surely as close as it gets. I tried the layout with several transistors (2n2904, BC107, 2N5088) but once again, I stick to my dear ME4003 (Si NPN, CBE, hfe around 140). Yeah, I bent the legs for Q2 - works like a charm. If anyone has a suggestion for that Q1 in the gut shots, let it hear. You might also try a logarithmic taper since most fuzz/loudness happens between 8 - 10.

Enjoy.

neoflox · Post by **neoflox** » 13 Apr 2010, 14:09

Correction, the ME4003 I was using had a higher hFe, around 250 to 400.

phibes · Post by **phibes** » 13 Apr 2010, 17:54

Do you get that 'octave sound' that's been talked about?