Emma - Reezafratzitz [ goop-alarm ]  [traced]

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Re: Emma - Reezafratzitz [ goop-alarm ]

Postby roseblood11 » 13 May 2011, 13:40

Does someone have a veroboard layout, esp for the new version?
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Re: Emma - Reezafratzitz [ goop-alarm ]

Postby kupervaser » 22 Dec 2011, 12:09

Built this thing last week.
Didn't work in the first place, but later on I spotted a connection between traces due to a bad etch. After the fix it started working. Everything works well, sounds great, however i consistently wired all of the 4 pot meters backwards.

Here are some pics and will post some sound samples later.

Image
Image
Image
Image
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Re: Emma - Reezafratzitz [ goop-alarm ]

Postby kupervaser » 22 Dec 2011, 23:53

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Re: Emma - Reezafratzitz [ goop-alarm ]

Postby thn.technik » 30 Apr 2012, 20:34

Hi guys,
I do it again hehehe... it's my new THN Reeza :D
Housing it's a box from USB stick, no foot switch bcoz is always standing at top of amplifier( BTW it's my own production, ECL86, 3W for home use)
I found 2 pcs OKI MSN4069RS IC in my old video recorder, its work much better than MCY74049 which I use before, so I change it also in my old Reeza, now is clearly difference in bias potentiometer.


REEZA_THN2_1.jpg

REEZA_THN2_2.jpg

REEZA_THN2_3.jpg

REEZA_THN2_4.jpg

BTW I get question about potentiometer names, so once again schematic with descriptions
THN_Reeza_Desc.JPG


And my small and simply amplifier 8)
THNTechnik4.jpg

DSC01419.jpg


Regards!

P.S.
Don't waste you time and build your own THN Reeza, it's great fun with this box :thumbsup
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Re: Emma - Reezafratzitz [ goop-alarm ]

Postby soonerrob » 01 May 2012, 03:35

Ive built 2 of these from the THN project... 1 from the THN pcb layout and one of my own from the THN schematic... both circuits are dead.

both audio signal die at pin 1 of IC... not sure what is wrong.
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Re: Emma - Reezafratzitz [ goop-alarm ]

Postby thn.technik » 01 May 2012, 09:11

soonerrob wrote:Ive built 2 of these from the THN project... 1 from the THN pcb layout and one of my own from the THN schematic... both circuits are dead.

both audio signal die at pin 1 of IC... not sure what is wrong.


PCB image is in mirror, so maybe try to turn up/down your IC 4069,

notice also that you need to have UB - unbuffered version of CD4069
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Re: Emma - Reezafratzitz [ goop-alarm ]

Postby soonerrob » 01 May 2012, 15:07

OMG... you're absolutely right technik.....

Hope I didnt fry my IC. :)
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Re: Emma - Reezafratzitz [ goop-alarm ]

Postby soonerrob » 02 May 2012, 04:59

Reeza is workin great.. thanks Technik... the IC was reversed. fixed.
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Re: Emma - Reezafratzitz [ goop-alarm ]

Postby Nicht Bernd » 02 May 2012, 08:21

thn.technik wrote:I found 2 pcs OKI MSN4069RS IC in my old video recorder, its work much better than MCY74049 which I use before, so I change it also in my old Reeza, now is clearly difference in bias potentiometer.


Hi,

do you know where to buy the OKI?
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Re: Emma - Reezafratzitz [ goop-alarm ]

Postby thn.technik » 02 May 2012, 18:35

Nicht Bernd wrote:
thn.technik wrote:I found 2 pcs OKI MSN4069RS IC in my old video recorder, its work much better than MCY74049 which I use before, so I change it also in my old Reeza, now is clearly difference in bias potentiometer.


Hi,

do you know where to buy the OKI?


Hi, I have no idea where you can buy it, I just disassemble my old AKAI tape video recorder.
BTW all parts in my second Reeza are from this recorder :wink:

I find only one shop with this part:
http://www.accordtech.com/4069RS.html
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Re: Emma - Reezafratzitz [ goop-alarm ]

Postby Throbb7 » 02 May 2012, 22:10

I have used the 74HCU04 14 pin chip in distortion circuits designed for the 4049ube and they work very well. I'm not sure if the pins match up. ;)

http://pdf1.alldatasheet.com/datasheet- ... CU04N.html
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Re: Emma - Reezafratzitz [ goop-alarm ]

Postby XoB » 11 Sep 2012, 12:55

thn.technik, why you won't use of classic fender of marshall tonestack. If we'll take kind of fender tonestack we'll get more mids deep & possibility to get some freq distribution
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Re: Emma - Reezafratzitz [ goop-alarm ]

Postby thn.technik » 12 Sep 2012, 06:02

XoB wrote:thn.technik, why you won't use of classic fender of marshall tonestack. If we'll take kind of fender tonestack we'll get more mids deep & possibility to get some freq distribution


main problem with "classic fender" tone stack is that if you put 10V RMS at input then you get 1V RMS at output, so you need to do x10 amplifier for signal.
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Re: Emma - Reezafratzitz [ goop-alarm ]

Postby biliousfrog » 13 Dec 2012, 14:03

I just wanted to gloat a little - bought a mk1 for £40 inc. postage. Sounds great so far, really looking forward to cranking it through a decent tube amp at rehearsal.

It seems very well voiced, the tone control (just one on this) is perfect at 12 o'clock, same with the volume and bias...in fact I'd be happy just running everything at noon.
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Re: Emma - Reezafratzitz [ goop-alarm ]

Postby IvIark » 13 Dec 2012, 19:04

Forgot to post this:

Image

Modified version with additional Bass and Mids controls:

Image
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Nefi_fatobene (02 Aug 2013, 19:54), Nicht Bernd (14 Dec 2012, 09:32), roseblood11 (14 Dec 2012, 00:20)
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Re: Emma - Reezafratzitz [ goop-alarm ]

Postby Nefi_fatobene » 02 Aug 2013, 20:12

Nice Job Guys!!! :applause:
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Re: Emma - Reezafratzitz [ goop-alarm ]

Postby asatbluesboy » 03 Aug 2013, 16:13

Loved the "circuit window". Why don't ALL pedals have that? Would save us a lot of trouble... :mrgreen:
...collectors together and emitter to base? You're such a darling...

ton.
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Re: Emma - Reezafratzitz [ goop-alarm ]

Postby juozasu » 25 Aug 2013, 14:06

mictester wrote: The original Emma board is MUCH bigger - and now you can see why.


The problem is not that components are close to each other, but it has a very problematic ground. PWR GND and SIGNAL GND, there is no "star GND" point.
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Re: Emma - Reezafratzitz [ goop-alarm ]

Postby TubeHugger » 28 Nov 2013, 07:50

here's mine.
my first etched PCB.
and second wrong IC mirroring :slap: (its on the back of the board)
did the thn.technic layout.
man it was dark sounding.
changed the low pass filter after the tone control and voila
it sounds great now.
i used 470K pots instead of 500K.
could this make a big difference on the sound? :scratch:
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Re: Emma - Reezafratzitz [ goop-alarm ]

Postby commathe » 28 Nov 2013, 08:34

That bias control is interesting. Is it just starving the op-amps and preventing them from amplifying the whole wave properly?
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