Author Topic: 9V Electric Mistress retrofit with MN3007  (Read 167094 times)

Thomeeque

Re: 9V Electric Mistress retrofit with MN3007
« Reply #120 on: July 24, 2010, 03:01:57 PM »
Any news on the TZF Board Thomeeque?  :icon_mrgreen:

 TZF3007 - TZF (short delay) module, MN3007 based

 Note for myself: never make promises lightly :icon_mrgreen:
Do you have a technical question? Please don't send private messages, use the FORUM!

azrael

Re: 9V Electric Mistress retrofit with MN3007
« Reply #121 on: July 28, 2010, 01:57:41 AM »
Gosh, I need to get an o-scope so I can bias this thing. That's the only reason I haven't built one. :(

12Bass

Re: 9V Electric Mistress retrofit with MN3007
« Reply #122 on: July 28, 2010, 08:30:49 AM »
Gosh, I need to get an o-scope so I can bias this thing. That's the only reason I haven't built one. :(

Although helpful, it is not necessary.  BBD bias can be adjusted by ear.
It is far better to grasp the universe as it really is than to persist in delusion, however satisfying and reassuring. - Carl Sagan

theehman

Re: 9V Electric Mistress retrofit with MN3007
« Reply #123 on: July 28, 2010, 08:32:08 AM »
Gosh, I need to get an o-scope so I can bias this thing. That's the only reason I haven't built one. :(

Although helpful, it is not necessary.  BBD bias can be adjusted by ear.

+1.  In all the years I've been doing repairs, I've always biased BBDs by ear.
Ron Neely II
Electro-Harmonix info: http://electroharmonix.vintageusaguitars.com
Home of RonSound effects: http://www.ronsound.com
fx schematics and repairs

JRM

Re: 9V Electric Mistress retrofit with MN3007
« Reply #124 on: September 15, 2010, 11:56:18 AM »
Hello

I've made a new layout joining both Gaussmarkov’s layout and daughter-board by Tomas (Tomeeque).
It's already tested and working. I Used the mods suggested by Dave W.(oldschoolanalog).
Schematics later (I'm lazy now  ;D)

http://www.4shared.com/document/wPcCxA3H/Mistress_9v_MN3007.html

I hope you like it !




If I got it right, to change this PCB from a 3007 to a more adequate 3207 just requires a change on pins 1 and 5, modify the values of R9 and R10 (don't imagine the right values) and conect R11 to Vcc instead of ground. I'll try to do an update drqwing of that.
« Last Edit: September 15, 2010, 12:00:58 PM by JRM »

DLC86

Re: 9V Electric Mistress retrofit with MN3007
« Reply #125 on: September 15, 2010, 07:33:37 PM »
If I got it right, to change this PCB from a 3007 to a more adequate 3207 just requires a change on pins 1 and 5, modify the values of R9 and R10 (don't imagine the right values) and conect R11 to Vcc instead of ground. I'll try to do an update drqwing of that.
You just have to exchange R9 and R10 (in the retrofit layout), for the other stuff you're right  ;)

JRM

Re: 9V Electric Mistress retrofit with MN3007
« Reply #126 on: September 16, 2010, 04:40:28 AM »
OK. The resistors it's easy: just swap R9 with R10 and connect R11 the other way around. For the IC: I was reading Panasonic's MN3207 and 3007 datasheets and found out that they have exactly the same terminal assignments. pdf files are too large to upload but it goes like this:
1-GND    8-OUT2
2-CP1     7-OUT1
3-IN       6-CP2
4-Vgg     5-Vdd

If this is correct we don't have to invert the IC. I'm right or did I miss something?

StephenGiles

Re: 9V Electric Mistress retrofit with MN3007
« Reply #127 on: September 16, 2010, 06:43:26 AM »
Gosh, I need to get an o-scope so I can bias this thing. That's the only reason I haven't built one. :(

Although helpful, it is not necessary.  BBD bias can be adjusted by ear.

+1.  In all the years I've been doing repairs, I've always biased BBDs by ear.

The sound heard out of the BBD when adjusting the bias trim should be nothing/distortion/clear/distortion/nothing, so set it at a point where clear sound is heard.
"I want my meat burned, like St Joan. Bring me pickles and vicious mustards to pierce the tongue like Cardigan's Lancers.".

DLC86

Re: 9V Electric Mistress retrofit with MN3007
« Reply #128 on: September 16, 2010, 07:04:50 AM »
OK. The resistors it's easy: just swap R9 with R10 and connect R11 the other way around. For the IC: I was reading Panasonic's MN3207 and 3007 datasheets and found out that they have exactly the same terminal assignments. pdf files are too large to upload but it goes like this:
1-GND    8-OUT2
2-CP1     7-OUT1
3-IN       6-CP2
4-Vgg     5-Vdd

If this is correct we don't have to invert the IC. I'm right or did I miss something?

You can find the answer on page 3 of this topic. The 2 ICs have the same pinout but MN3007 has P-channel FET while MN3207 has N-channel FET so you have to exchange just pins 1 & 5 to compensate this difference. You can compare my retrofit for MN3207 with the original 3007 one to see the changes I did

JRM

Re: 9V Electric Mistress retrofit with MN3007
« Reply #129 on: September 16, 2010, 07:22:49 AM »
OK! It was just an English issue (not my mother language). When I saw change pins 1 and 5 I thought the chips were different (kind of mirror image). Know it's even easier than I tougth. Thanks a lot.

jorge r

Re: 9V Electric Mistress retrofit with MN3007
« Reply #130 on: September 20, 2010, 03:24:03 PM »
Hello

This is the new version with output boster and the complete schematic.:





The link for PDF:

http://www.4shared.com/document/8sQgOJF0/Mistress_MN3007_English.html

Tested and working.I  hope you like it.

jorge r

Re: 9V Electric Mistress retrofit with MN3007
« Reply #131 on: September 20, 2010, 03:28:06 PM »
sorry

oldschoolanalog

Re: 9V Electric Mistress retrofit with MN3007
« Reply #132 on: September 20, 2010, 05:12:10 PM »
Nice work jorge! :icon_cool:
One suggestion/BIG favor... Could you please put some send & return pads for the TZF option on the board? Just refer to the original markusw schematic/PDF for placement. I have a TZF board on the way and want to use this layout for the main flanger circuit. If all goes well then maybe the EM & TZF boards can be incorporated on one PCB.
Thanks!
Mystery lounge. No tables, chairs or waiters here. In fact, we're all quite alone.

jorge r

Re: 9V Electric Mistress retrofit with MN3007
« Reply #133 on: September 20, 2010, 05:39:19 PM »
Could you please put some send & return pads for the TZF option on the board?

Yes , will be a pleasure. Tomorrow I'll do it !

jorge r

Re: 9V Electric Mistress retrofit with MN3007
« Reply #134 on: September 21, 2010, 09:58:11 AM »
oldschoolanalog

Here is the send/return version:

http://www.4shared.com/document/xNi5MG7d/Mistress_MN3007_SendRet.html


oldschoolanalog

Re: 9V Electric Mistress retrofit with MN3007
« Reply #135 on: September 21, 2010, 10:18:44 AM »
Thanks! ;D
Mystery lounge. No tables, chairs or waiters here. In fact, we're all quite alone.

Ummagumma

Re: 9V Electric Mistress retrofit with MN3007
« Reply #136 on: September 21, 2010, 02:43:48 PM »
now with 3207 please!!!  :icon_wink:

jorge r

Re: 9V Electric Mistress retrofit with MN3007
« Reply #137 on: September 21, 2010, 03:21:02 PM »
I can do it with 3207, but I canīt test it and I need to read how to do it, so takes more time...

JRM

Re: 9V Electric Mistress retrofit with MN3207
« Reply #138 on: September 30, 2010, 11:59:57 AM »
I was trying to base the 3207 pcb layout on jorge's 3007 but I've discovered that the 3207 scheme (on the 1st or 2nd page of this thread) is not exactly the same, with several changes and specialy with less components (8 resistors and 3 caps if I've counted correctly). 3007 scheme is nearer the original SAD1024 scheme. Can somebody explain me why?

jorge r

Re: 9V Electric Mistress retrofit with MN3007
« Reply #139 on: October 04, 2010, 03:16:46 PM »
Hi
I 've exchanged pins 1 & 5 in the layout. Is that enought?
If someone wants to try...

http://www.4shared.com/document/ZahcEM1H/EM_3207_test.html

IT IS NOT TESTED!!!