cjs2k

Greg's Parts Lists - ALL
« Reply #20 on: March 07, 2006, 01:40:06 AM »
:shock:  Wow... That helps alot!  Thanks!  :thumb:


MrZpliff

Greg's Parts Lists - ALL
« Reply #21 on: March 07, 2006, 08:16:45 AM »
Quote from: "Greg"
I love the Melcor. It's inexpensive to build, too !!!  :thumb:

I think I built 4 for $16-$18. :green:


Did you use this schematic for your Melcors ?
http://www.thediypill.phx.com.br/forumfiles/1731_SCH.PDF
Peace
Magnus
www.bitterend.se

Greg

Greg's Parts Lists - ALL
« Reply #22 on: March 07, 2006, 08:46:04 AM »
Yes I think so. I also remember having another schematic, too, but I don't know where it came from. Here's the accompanying BOM from Fabio:

http://www.thediypill.phx.com.br/forumfiles/M1731_partlist.pdf

If you don't mind, give a check to see if I'm missing anything. I don't think anyone has ever checked it over for me.
Greg Stein
New Orleans, LA

Jonkan

Greg's Parts Lists - ALL
« Reply #23 on: March 07, 2006, 09:00:47 AM »
the pcbs for peter c version, and fabio are the same. But on fabios schematic theres two resistors that combined is 43k9 where on peters version theres two 39k2 resistors.

If anyone knows what works better 2x39k2, or 39k2 and 43k9, please tell me!

On fabios schematic c1 is 680pf, its supposed to be 1000pf.

thats all i think.

Greg

Greg's Parts Lists - ALL
« Reply #24 on: March 07, 2006, 09:23:42 AM »
Thanks Jonkan, you are correct. My parts list includes the 43K9 and 1000p feedback cap. All this Melcor talk is making me want to stuff some more !!! I think I've got 5-10 boards lying around.
Greg Stein
New Orleans, LA

Purusha

Re: Greg's Parts Lists - ALL
« Reply #25 on: March 07, 2006, 12:45:51 PM »
Quote from: "Greg"


GSSL with Panasonic FC Lytics
GSSL with Nichicon PW Lytics
Desc: Very popular SSL buss compressor project designed by Jakob. I have two versions listed above. The first uses Panasonic FC electrolytics, for a very hi-fi type sound (extended top and bottom with mid scoop). The second uses Nichicon PW for smoother sound with lush mids (my personal favorite).


Hi Greg,

so you are refering to these two caps only (100u and 22u 25V)?

I think I got the Jamicon caps. I have to check. Has anyone tried the Jamicon caps, yet?

Well, I can try some other caps later on. First I have to finish all my GSSLs and make them work  :grin:
Regards as always, Purusha

Greg

Greg's Parts Lists - ALL
« Reply #26 on: March 07, 2006, 12:55:25 PM »
Yes, the 100u25 and some of the 22u25 are in the audio path, so they'll definitely influece the overall frequency response of the unit. Some of the 22u25 are in the power supply as well, but I just ordered the same either way to make it simple. The NHG series caps are in the power supply only. I often use the NHG as my "all-purpose" type cap for PSUs.
Greg Stein
New Orleans, LA

Purusha

Greg's Parts Lists - ALL
« Reply #27 on: March 07, 2006, 01:10:25 PM »
Would it be too much if I ask you to circle the positions of those caps which are most important fot the sound on the PCB picture? I am still not an expert DIYer and familiar with the whole SSL project to be 100% sure where the audio path on the PCB layout goes  :oops:

... sorry, but I am from SLOWenia   :green:
Regards as always, Purusha

moogah

Greg's Parts Lists - ALL
« Reply #28 on: March 07, 2006, 01:38:10 PM »
Hey, this is some good stuff here!  For the posterity I've got this all saved on my local archive as well.

clintrubber

Greg's Parts Lists - ALL
« Reply #29 on: March 07, 2006, 02:09:43 PM »
Quote from: "MrZpliff"
Did you use this schematic for your Melcors ?
http://www.thediypill.phx.com.br/forumfiles/1731_SCH.PDF


As has become quite certain, D2 needs to be a double diode, as discussed in the 1731-thread. I thought the pic on page 1 of that multiple-pages-thread had this update.


Jonkan

Greg's Parts Lists - ALL
« Reply #30 on: March 07, 2006, 03:00:26 PM »
Quote
D2 needs to be a double diode


I can double confirm this with my ears.

Much better!  :green:

Id still like to know about r3,r4 though.

Maybe that doesnt matter much?

/j

clintrubber

Greg's Parts Lists - ALL
« Reply #31 on: March 07, 2006, 03:13:05 PM »
Let's please not spoil Gregs nice listing of BOMs with re-re-threads of the 1731, so let's jump to:

http://www.groupdiy.com/index.php?topic=89&postdays=0&postorder=asc&highlight=1731&start=0
or to one of the other already existing 1731/Melcor-threads.

I know, it's 11 pages, but imho better one 1731-thread with 60 pages than ten threads with ten pages each, since 10*10 > 60 !  :wink:

dissonantstring

Greg's Parts Lists - ALL
« Reply #32 on: March 07, 2006, 03:15:27 PM »
hi peter and jonkan,
sorry for the stupid question, but for the D2 on the 1731 the double diodes (1N4148) should be in series?   like so?  ---->|------>|----
thanks,
grant
oops!  just saw peter's last post. :oops:  will post in the other thread.
edit: "ladies and gents...here is your answer....!"
http://www.groupdiy.com/index.php?topic=89&start=150

quadwould

Greg's Parts Lists - ALL
« Reply #33 on: March 07, 2006, 03:16:58 PM »
Great Work Greg!!!

i just love the organised clear format of your BOMs

 :thumb:  :guinness:
"Feck, Arse, Gurls!" -Father Jack

CJ

Greg's Parts Lists - ALL
« Reply #34 on: March 07, 2006, 03:56:51 PM »
yeah, thats a killer post.

hey, since i am such a lazy assss and too stupid to
do a search, do the API 312's use the same board
as the Melcors?
you know, the little 1 inch squre things.
thanks!
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html

BR

Greg's Parts Lists - ALL
« Reply #35 on: March 07, 2006, 04:09:10 PM »
AWESOME Greg...
thanks.

Hey CJ,
Fabios 312 has space for any opamp you want  to through in there.
The 1731 boards he has fit in perfectly..

BTW..
Greg..
I think you have to change the part number for some parts on the 1731 list (at least).  Some of the resistor values need to have "-RC" added to the end.
These are the ones I found from the 1731 list.
270-91-RC
270-120-RC
270-5.6K-RC
270-43.2K-RC
270-130K-RC

Also this cap 80-C320C100J1G has a minimum 1000 units limit on it.
Just thought I should let you know.  I still haven't searched for a replacement for this cap, but I know it won't be too hard.

I'm assuming you went with 1/8w for fisical size of resistor, right??
Basically every 1/4w resistor from mouser need to have the -rc attached to the end now.

thanks again
Gil

Greg

Greg's Parts Lists - ALL
« Reply #36 on: March 07, 2006, 04:13:21 PM »
hey BR, I don't know what the deal with the RC is... but in time I suspect all the resistors will need the RC after them. In the words of CJ, I'm too much of a lazy ass to go back and change them, but I'm sure people will get the idea. I'll double check on what caps I used. Whatever you get, I'd recommend C0G type.

And regarding the 1/8W, I ordered 1/4W istead, so I can't comment on the 1/8W. But yes, they will be smaller.
Greg Stein
New Orleans, LA

CJ

Greg's Parts Lists - ALL
« Reply #37 on: March 07, 2006, 04:13:39 PM »
Fabio's 312 boards, the little guys for stuffing compact  opamps, will it work for Melcor also?
or different circuit?
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html

Greg

Greg's Parts Lists - ALL
« Reply #38 on: March 07, 2006, 04:15:52 PM »
I used Melcor in one !!!  :thumb:  :thumb:  :thumb:

I wish I could get more Profile iron.  :cry:  :roll:

http://members.cox.net/capstanrecording/API/312_Top1.JPG
Greg Stein
New Orleans, LA

CJ

Greg's Parts Lists - ALL
« Reply #39 on: March 07, 2006, 04:19:34 PM »
i got the 2503 kits if thats what you mean.
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html


 

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