Roger Mayer - Axis Fuzz

General documentation, gut shot, schematic links, ongoing circuit tracing, deep thoughts ... all about boutique stompboxes.

Re: Roger Mayer - Axis Fuzz

Postby Fanum » 23 Jan 2010, 01:53

Well, the funny thing is that he initially thought the fuzz with these components .... Perhaps the original Axis Fuzz them had ... Octavia have ... and the axis fuzz is its close relative ...
Of course, now no longer used (do not see the components and even the slopes, as can be seen from the new AF).
Ah !.... confirm .... the sound changes enough .... with or without. (ie audible)

Excuse my poor English
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P.S for you which is the right hfe of the transistors?
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Re: Roger Mayer - Axis Fuzz

Postby swt » 23 Jan 2010, 11:55

i have a bunch of the motorolas, so let me check for hfe of the ones that bias ok....
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Re: Roger Mayer - Axis Fuzz

Postby Fanum » 05 Feb 2010, 19:02

swt wrote:i have a bunch of the motorolas, so let me check for hfe of the ones that bias ok....


UP :P
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Re: Roger Mayer - Axis Fuzz

Postby swt » 09 Feb 2010, 12:26

ups sorry for the delay...i'm on holidays. Give me a couple of days and will check them...
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Re: Roger Mayer - Axis Fuzz

Postby Fanum » 20 Feb 2010, 23:59

swt wrote:ups sorry for the delay...i'm on holidays. Give me a couple of days and will check them...


Don't worry.. :popcorn:
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Re: Roger Mayer - Axis Fuzz

Postby andres_a884 » 10 Jun 2010, 17:27

Hi,
Does anyone Know if this layout can be build with AC127 and Ac128 I have a couple of them and want to use it.

download/file.php?id=6119&mode=view

Thanks,
Ariel.
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Re: Roger Mayer - Axis Fuzz

Postby andres_a884 » 13 Jun 2010, 16:45

Built the PTP board and works perfectly, now I´m testing AC128, AC127 and B324 germanium transistors searching for the goods ones, with silicon transistors works fine.

Some photos,

http://www.flickr.com/photos/38980696@N04/sets/72157624140962499/

Which is the best way to test germanium transistors ?.

Thanks.
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Re: Roger Mayer - Axis Fuzz

Postby DougH » 14 Jun 2010, 21:28

Fanum wrote:Well, the funny thing is that he initially thought the fuzz with these components .... Perhaps the original Axis Fuzz them had ... Octavia have ... and the axis fuzz is its close relative ...


The story from 'somewhere' (RM?) was that this filter was needed in Europe but not in the U.S. (?!?!?!?) Smells like BS to me... I suspect it was part of whatever circuit he used to develop the Axis Fuzz from, and the Octavia, and whatever else he also based on it. Then at some later date he realized it wasn't needed. Just a guess... YMMV.
"You have just tubescreamered or fuzzfaced yourself " -polarbearfx
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Re: Roger Mayer - Axis Fuzz

Postby analogguru » 15 Jun 2010, 07:34

analogguru wrote:The use of this RC-Network is described here on page 3:
http://www.tcaas.btinternet.co.uk/jlh1970.pdf

These components reduce the (inaudible) High-Frequency-response and are used to avoid High-Frequency-oscillation. Therefore not really needed in this application and omitted.

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Re: Roger Mayer - Axis Fuzz

Postby DougH » 15 Jun 2010, 13:39

Thanks AG for clearing that up. I thought this circuit came from somewhere else (i.e. not RM).
"You have just tubescreamered or fuzzfaced yourself " -polarbearfx
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Re: Roger Mayer - Axis Fuzz

Postby GBlekas » 05 Mar 2011, 15:15

IvIark wrote:I may as well add this to the thread for anyone interested in turrets or ptp wiring:

Roger Mayer Axis Fuzz - IvIark.png

On Fuzz Central there is a recommendation to omit the 220R + 1nF in column 5 so it may be worth experimenting.
Axis fuzz turret layout.PNG


I was looking at the layout and just wanted to point out a duplication of a cap.
I believe only one of these are needed, if I am following the schematic correctly.

Looks cool though so thanks for your time!

George
You do not have the required permissions to view the files attached to this post.
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Re: Roger Mayer - Axis Fuzz

Postby IvIark » 05 Mar 2011, 15:27

Yes you're right, it's been duplicated so you could make it 1 column narrower. It looks as though I've shown the volume pot backwards as well, you should swap 1 and 3. That'll teach me to interpret pots on schematic literally, although in my defence that was one of my early layouts! :D
"If anyone is a 'genius' for putting jacks in such a pedal in the only spot where they could physically fit, then I assume I too am a genius for correctly inserting my legs into my pants this morning." - candletears7 - TGP
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Re: Roger Mayer - Axis Fuzz

Postby andregarcia57 » 13 Sep 2019, 17:26

Hello ... Does anyone know Hfe values of Q1 and Q2 from the original RM?
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Re: Roger Mayer - Axis Fuzz

Postby Cigano23 » 07 Oct 2019, 19:44

andregarcia57 wrote:Hello ... Does anyone know Hfe values of Q1 and Q2 from the original RM?


They're around 150-200hfe.
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