D-AOC PCBs - the building and help Thread

MartyMart

Well-known member
Joined
Feb 28, 2006
Messages
2,340
Location
Berlin for a while
Volker - no problem, I should have checked, don't need anything at the mo
from Farnell, so I'll "fudge" something with a couple of zeners.
MM.
 

Jonkan

Well-known member
Joined
Jun 7, 2004
Messages
733
Location
Sweden
What kind of neon lamp are you talking about? Any chance of a part number somwhere so i have a reference?

Im not even sure what these will do? I must have missed this in the thread somehow im guessing. If someone could fill me in real quick, id be happy!

And to you who has completed the build with edcor transformers im wondering which edcors you ended up with?

Thanks!
/J
 

sinestaraudio

Well-known member
Joined
Sep 21, 2007
Messages
783
Location
UK
Hi All,

Yes Volker you were right, put the led in and it compressed just lovely!

works and sounds incredible...just as nice as my LA2a if not nicer, faster attack / release times is what i'm liking.

ill post pictures tomorrow.

ZZZzzz
 

[silent:arts]

Well-known member
Joined
Jun 4, 2004
Messages
5,131
Location
Berlin, Germany
[quote author="sinestaraudio"]works and sounds incredible...just as nice as my LA2a if not nicer, faster attack / release times is what i'm liking[/quote]
first price for the fastest build I guess :thumb:

:green: now the pics please :green:
 

MartyMart

Well-known member
Joined
Feb 28, 2006
Messages
2,340
Location
Berlin for a while
Volker, just wanted to say that the boards are laid out beautifully !
It would be almost impossible to "screw up" so long as you check component
value and polarity ..... a breeze :)
Good spacing and traces in all the right places, I'm sure this will be quiet as
a mouse in operation.

Just waiting on some parts from Musikding and the Tat case, it's really a work
of art ..... Great job :sam: :sam:

Marty.
 

Brizco

Well-known member
Joined
Sep 6, 2004
Messages
424
Location
Switzerland, Zürich
[quote author="[silent:arts]"]INPUT TRANSFORMERS

today I opened up my box of transformers, and took some of them out where I thought they could fit in this circuit.

from left to right:
Edcor XSM10K/10K, Edcor WSM10K/10K, Lundahl LL1540, Haufe RK310-2, Haufe RK255-1, Haufe RK240, API 2621, Neve T.1442 (= 31267)


(all at 1:1, except Haufe RK240 which is 1:2)[/quote]


i have a question regarding the haufe rk255/1.

-does the red dot, mark the pin 1?
-how did you wire it?


thanks a lot!
 

Denyle Guitars

Well-known member
Joined
Mar 21, 2007
Messages
291
Location
MD, USA
[quote author="MikoKensington"]I think I'll contact Edcor tomorrow about the power transformer.[/quote]

What's the word on these? Any chance of a US group buy?
 

MikoKensington

Well-known member
Joined
Jun 3, 2004
Messages
1,368
Location
Detroit
[quote author="Denyle Guitars"][quote author="MikoKensington"]I think I'll contact Edcor tomorrow about the power transformer.[/quote]

What's the word on these? Any chance of a US group buy?[/quote]

Well, before a group buy can take place, I think we all need to agree on what the 3rd secondaries ( :? ) should be in terms of voltage and current.

220V 0.1A
9V 2.5A
? ?

Anyone like to chime in?
 

bernbrue

Well-known member
Joined
Mar 13, 2006
Messages
1,516
Location
Wolfenbüttel - Germany
Well,
Pri 2x 115 (230V), sek1 250V 0,1A, sek2 9V 2,5A and sek3 24V 0,5A seems to be a good choice. With these specs you have to use 24V relays in the D-AOC. 24V can easily be adapted to provide phantom power via voltage doubler for mic pres or for meter and pilot lamps. Such a power transformer is quite useful for other tube projects, too.
regards
Bernd
 

MikoKensington

Well-known member
Joined
Jun 3, 2004
Messages
1,368
Location
Detroit
Well, I'll get a quote from Edcor then. The price of the Musikding transformer with shipping to the U.S. is around $70. We'll see if Edcor can beat that. :wink:
 

[silent:arts]

Well-known member
Joined
Jun 4, 2004
Messages
5,131
Location
Berlin, Germany
[quote author="Brizco"]
i have a question regarding the haufe rk255/1.
-does the red dot, mark the pin 1?[/quote]
yes. Datasheet
[quote author="Brizco"]-how did you wire it?[/quote]
1:1
 

MikoKensington

Well-known member
Joined
Jun 3, 2004
Messages
1,368
Location
Detroit
OK. I got a reply from Edcor about the custom power transformers. They will be a about $46 each. Plus the one-time $20 setup charge. I will buy the first one to get things rolling. I'm waiting to hear about a price break, too. I asked that the leads be made nice and long for those that may wish to mount the transformer outside of the case rear.

Here is what the basic dimensions will be.
http://www.audiotransformers.net/forum/index.php?action=tpmod;dl=item277

The differences are, ours will be vertical mount without the "L" brackets and they will have end bells like the Edcor Class X transformers.

U.S. guys let me know if you're interested.
 

jrfred453

Well-known member
Joined
Dec 9, 2007
Messages
209
Location
Virginia
I'm trying to get a parts order together and I'm having trouble finding a few things in the USA.
I can't find any 39K 2w resistors or 1N5371 diodes. I checked both Mouser and Digikey as thats where I plan to buy most of the other parts from. Anyone know where to get them in the USA?

I've almost got a BOM done if anyone wants to try it out, let me know.
 

MikoKensington

Well-known member
Joined
Jun 3, 2004
Messages
1,368
Location
Detroit
[quote author="jrfred453"]I'm trying to get a parts order together and I'm having trouble finding a few things in the USA.
I can't find any 39K 2w resistors or 1N5371 diodes. I checked both Mouser and Digikey as thats where I plan to buy most of the other parts from. Anyone know where to get them in the USA?

I've almost got a BOM done if anyone wants to try it out, let me know.[/quote]

I haven't had much luck with the 39K either. So I was thinking of using a 33K and a 6.2K in series. Would that work?

The 1N5371 isn't easy to find. Mouser does have some NE2 neon lamps, but I'm not sure which to go with. I'm assuming it's 65V AC but I don't know the current rating we need.
 

sinestaraudio

Well-known member
Joined
Sep 21, 2007
Messages
783
Location
UK
Hi all,

Still work in progress but here are some pics of my almost finished unit, just need to tweak the meter circuit and add the meter lights. Ill probably change the traffo at some point, although their not bad, but Its such a good design it seems a shame to waste good response on a lesser transformer. I'm sure some one knows how to get a better performance out of them than I?

here is a link the the rightmark analyser tests i did that shows freq res, THD etc etc etc...I used all Edcors TX used in Volkers test.

http://www.sinestarproject.com/opto.htm

and this is what it looks like..(not sure why it has made the post so wide! sorry..)

I have put a 5 pos switch "Limit Mode" on board that alters the curves, 1=off, 2=100k 3=blue LED, 4=Red LED 5=Blue LED anti parallel. As you see from Volkers curves each increase results in a tad more compression / limiting. i love the way it sounds, i have tested it on drums so far and im loving it!! I think you all will too..

Pete


opto1.jpg






opto2.jpg






opto3.jpg






optopanel.jpg







gizzards.jpg
 

JanW

Member
Joined
Oct 19, 2005
Messages
21
Location
Hamburg/Germany
Wow :shock: :shock: :shock:

that was really a fast build.

really nice !

I like the switch for the different modes.

Jan
 

MikoKensington

Well-known member
Joined
Jun 3, 2004
Messages
1,368
Location
Detroit
[quote author="[silent:arts]"]NE2 is just - perfect :thumb: :thumb: :thumb:[/quote]

But there are a few different suffixes. Like NE2E. Volker, what do you think of this fella?
http://www.mouser.com/Search/ProductDetail.aspx?qs=rHu0DOexXLC8qwRiDFto6g%3d%3d
 

Latest posts

Top