Z.Vex Machine

Re: Z.Vex Machine

kann jetzt bitte eienr den schaltplan verbessern oder so!? ich kann zwar englisch aber bin letzendlich doch nicht soooo gut

Re: Z.Vex Machine

Der 7.4nF-Kondensator im Plan müsste eigentlich ein 74n sein. So ist zumindest der aktuelle Stand.

Re: Z.Vex Machine

achsoo^^ ich hab gedacht noch andere dinge^^

ich bau das teil auch noch (wenn korrekt ist^^) dann können wir ja eine: "wer kanns am schönsten anmalen" competition machen^^ also am realistischsten am orginal;)

Re: Z.Vex Machine

Ob das nicht 47nF heißen sollte ?
(If this shouldn´t read 47nF ?)

Ich warte mal auf die Bilder, 4k und 6k sind mir auch sehr suspekt, selbst als 1% Widerstand.
(I will wait for the pictures, 4k and 6k are also suspect even with 1% tolerance.)

Der 10nF am Eingang ist ja auch nicht ohne. Ich würde es auch einmal mit 1nF probieren. Der verschiebt die Pickup-Resonanz doch ganz beträchtlich und the Höhen kommen auch nicht mehr ganz so sauber durch..
(The input capacitor I would also try with 1nF cause it will shift the pickup resonance and cut the highs).

Dafür zeigen die 10nF am Ausgang erst ab 2kHz irgendeine Wirkung.
(otherwise the 10nF at the output start influence the signal above 2khz)

Die übrigen Bauteilwerte erinnern mich stark an das Roger Mayer Classic Fuzz.
(The rest of the components reminds me to the Roger Mayer Classic Fuzz).

Hier noch was als Unterlage für den Basteltisch:
Scheinwiderstand von Kondensatoren
(= reactance of capacitors)

analogguru

Re: Z.Vex Machine

Ich liebe dieses forum - sorry my Deutsch is not that good, but I do understand most of what you people share.
Good to see you Torchy and Tcobretti - welcome to free discussion without those heavy handed un mentionable hidden members over at Aron's site.
Das ist Sehr Gut.
Mfg
Steve
New Zealand

Re: Z.Vex Machine

AG, I am almost positive (it's been several months now) that I measured those resistors with a DMM. The only reason the 7.4/74 issue happened is because I couldn't quite read what it said on the cap itself.

BTW, I have built a WM based on the corrected schem, and it sound pretty much exactly the way ZVEX's sounded.

Re: Z.Vex Machine

Zitat

AG, I am almost positive (it's been several months now) that I measured those resistors with a DMM.

This clears something. So this was not the color-code. Did you measure the resistors in-circuit or did you take the resistors out ?

If you measured in-circuit:
What was the slider position of the tone and volume control ?

Zitat

The only reason the 7.4/74 issue happened is because I couldn't quite read what it said on the cap itself.

The only problem I have is that the E12 values are:
10n, 12n, 15n, 18n, 22n, 27n, 33n, 39n, 47n, 56n, 68n and 82n.
even in the E24 it would be:
...47n, 51n, 68n, 75n, 82n, 91n....

So no "standard" 74n capacitor. Long time ago there were produced special 1% capacitors with special values for filters in telephone applications, but I don´t believe that zacki used such capacitors. This would lower the profit.

74n would be ok if measured (tolerance) but not if printed on the cap.

analogguru

Re: Z.Vex Machine

I did not take the resistors out of the circuit, and I should say that I used a DMM but also noted the color codes. I don't remember what position the pots were in.

About the cap:

Very interesting point! I did not measure it, and all I can remember is that it had a 7 and a 4 in that order. It was a small, ceramic, axial cap.

Re: Z.Vex Machine

Zitat

I did not take the resistors out of the circuit, and I should say that I used a DMM but also noted the color codes. I don't remember what position the pots were in.

The pots will influence the measured value. What have been the colorcodes ?

Zitat

I did not measure it, and all I can remember is that it had a 7 and a 4 in that order. It was a small, ceramic, axial cap.

seems to be a multilayer ceramic. such capacitors are marked 473 for 47n and 474 for 470n (or 0,47µ).

independent if the schematic is a big muff style tone-control or the tone control is as drawn, the resistor measured 6k will be in reality a 10k (assuming tone poti in the middle position).

Knowing that Zacki "occasionally" uses existing designs and looking at the:
EH Big Muff Pi (OpAmp) schematic
which uses also a 10k poti 10nF (instead of 100nF) with a 10k (instead of 1k2) pulldown seems real. Also 5k6 (will give about 4k measured value) and 470n (instead of 120n) for Bass could be possible.

analogguru

P.S.: ein paar englischstunden haben noch niemanden geschadet, hättets in der Schule besser aufgepaßt ;D

Re: Z.Vex Machine

Honestly, I can't really tell you any more than I have. I'm quite certain that I checked the color codes in addition to measuring the resistances, but it's been long enough that I can't remember anymore of the specifics than I have told you.

Re: Z.Vex Machine

Hmmm, all the more interesting will theblackman's photos be.

Re: Z.Vex Machine

Hello guys,

you can build at least 10 different tonestacks with 2 Rs, 2 Cs and a pot.
I've included a pic with some possibilities for those who want to try.

Regards, Jürgen

Re: Z.Vex Machine

BTW: the mammoth is not a ZV design, he only build it and licened the circuit from a bass player who designed it as a bass fuzz.

Jürgen

Re: Z.Vex Machine

Zitat

the mammoth is not a ZV design, he only build it and licened the circuit from a bass player who designed it as a bass fuzz.

Roger Mayer claims to have invented the octavia - later the same driver circiut was used in the Helios mixing console....

Zvex claims that he dissected and traced a Rupert Neve console for the SHO....

And now he licensed the circuit for the WM from a bass player. So this cannot be anybody, this can only be a bass player as important as Jimi Hendrix...but I am sure he doesn´t want to be named.

So who can it be? It is very easy:
I am nearly sure it can only be the bass player of Joe Scarbury who landed in the eighties a hit with the title song for the series The Greatest American Hero - here is the song text who gives the proof:

Zitat

Look at what's happened to me,
I can't believe it myself.
Suddenly I'm up on top of the world,
It should've been somebody else.

Believe it or not,
I'm walking on air.
I never thought I could feel so free-.
Flying away on a wing and a prayer.
Who could it be?
Believe it or not it's just me.

It's like a light of a new day-,
It came from out of the blue.
Breaking me out of the spell I was in,
Making all of my wishes come true-.

Believe it or not,
I'm walking on air.
I never thought I could feel so free-.
Flying away on a wing and a prayer.
Who could it be?
Believe it or not it's just me.

Alles anzeigen

So who was the bass player of Joey Scarbury ? ::)

analogguru

Re: Z.Vex Machine

Hi Analogguru
I remember that song - nearly drove me insane - who was that blond haired guy in the TV show - Bill Katt?? I think. hehe
According to the greatest American designer of handbuilt FX pedals, the bass player is mentioned on his ego stroking forum under the Happy Birthday Zakk section - he apparently has been celebrating by spending the weekend drinking with him in NYC. Chuck Swindley or some name like that!!

How there is any similarity between Rupert Neve's design and the SHO completely eludes me - I have never seen a Neve design (and I have seen a few of them) with a hissy BS170 mosfet - don't think they were available back then anyways. Sounds similar to Bush's explanation for liberating (or was that destabilising ) Iraq.
Reminds me of that tacky 80s hit "Star Trekking" - "we come in peace, shoot to kill"
OR "there's Klingons on the starboard bow, scrape them off Scotty" ;D ;D ;D

Re: Z.Vex Machine

Chuck Zwicky is the bass player's name (also producer and recording tech.) . You can find more infos in ZV's forum under "Whooly Mammoth".

Jürgen

Re: Z.Vex Machine

Hi Jurgen
Thanks - At least i got the Chuck right!

Re: Z.Vex Machine

Hi Folks
It sure would be nice for all us non German speaking members if there was a small translation table.
for example: Eintrag = Post
Suche = Search
Hilfe = Help
Vorschau = ??? preview (add by Uwe) ;D
I found it difficult filling in my profile form, as I am sure others will as well.
I feel sure there are many of us foreigners who may wish to share and more fully participate in this forum.
Cheers
Steve

PS umlauts can be difficult on US English keyboards - any suggestions??

Re: Z.Vex Machine

http://dict.leo.org/?lang=de&lp=ende

ps:
ä=ae
ü=ue
ö=oe

Re: Z.Vex Machine

danke schoen aetschi