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SE330 Building, Transistor equivalent?
MUFF WIGGLER Forum Index -> Oakley Sound Systems Goto page 1, 2  Next [all]
Author SE330 Building, Transistor equivalent?
vaktmesterj
Hi all

Having a really good time putting this together, lots of parts and nice pcb.

I got these transistors from a guy who said they where equivalent of the ones listen in the builders guide.

One has written "BC557 B" on it, and is suposed to work as the "BC560" pnp listed in the builders guide.

The other one has written "BC547 B" on it and is suposed to work as the "BC550" npn listed in the builders guide.

Can anyone confirm this?

Thanks!
Synthbuilder
Both of those will work.

The BC547 and BC557 are noisier (and cheaper) than their BC550 and BC560 counterparts. However, it shouldn't matter in the SE330 as none of the transistors actually pass any audio.

Tony
vaktmesterj
Shouldn`t matter then, thank you!
vaktmesterj
Another question:

I got the LM13700N, whats with the "N"? Will it do the same job?
Synthbuilder
vaktmesterj wrote:
I got the LM13700N, whats with the "N"? Will it do the same job?

Yes. That's the correct part.

The N is the package designation suffix, ie. the part comes in a plastic dual in line casing. Different manufacturers use different suffixes but the N one is used by Texas Instruments.

Tony
vaktmesterj
Thanks alot!

For the DG403 farnell has a couple of options, which one is the right one?

http://no.farnell.com/webapp/wcs/stores/servlet/Search?catalogId=15001 &langId=47&storeId=10169&gs=true&st=DG403

cheers
Synthbuilder
vaktmesterj wrote:
For the DG403 farnell has a couple of options, which one is the right one?


This one:

http://no.farnell.com/vishay-siliconix/dg403dj-e3/ic-switch-dual-spdt- dip16-403/dp/1077116

All the others are surface mount types - ie. SO16 packages.

Tony
vaktmesterj
Thanks for helping me out.

Almost done with the board, only a couple of chips missing, and the molex stuff.
I think i got everything right but im stuck on this one: "4 way 3.96mm Molex KK or MTA header".

And, i need contacts for the wires between the boards, what is that called? Plug?

Cheers
vaktmesterj
...that is, molex contacts for the wiring between the boards
Synthbuilder
Molex housings are what you put the crimp terminals into, so four crimp terminals and one housing makes up the connector. Crimp terminals need to be 'crimped' with a crimper. Crimpers are quite expensive if you're only doing a one off job so it might be better to just solder the wires into the terminals.

Alternatively, forget the whole idea of using connectors and just solder your power supply leads onto the board from the power supply directly.

This is what goes into the board:

http://uk.farnell.com/molex/09-65-2048/connector-header-tht-3-96mm-4wa y/dp/1756762

This is a housing:

http://uk.farnell.com/molex/09-50-7041/housing-3-96mm-4way/dp/2063768

This is one type of the crimps:

http://uk.farnell.com/molex/08-52-0072/contact-socket-24-18-awg-crimp/ dp/1756639?MER=en-mer-0713-pd-r2-acce

You need to strip back the wire by 4mm or so. Lay it into the terminal and crimp down on the terminal so the terminal's parts are squashed onto the wire.

There's some more details about this in the Construction Guide from page 27. This relates to 0.1" (2.54mm) types but it is equally valid for the larger 0.156" (3.96mm) types too.

http://www.oakleysound.com/construct.pdf

Tony
vaktmesterj
Thank you. Excactly what i needed to know.

In the builders manual, i notice there are some kind of metal pins extending from the 3-way toggle switch. Those are not on the switch in my cart. Can i use wire for that, or is there a part i can buy?

http://no.farnell.com/apem/5639a9/switch-spdt-ctr-off/dp/1082308
Synthbuilder
I use these ones:

http://uk.farnell.com/multicomp/1ms3t2b4m7re/switch-pcb-spdt-horiz/dp/ 9473300?ost=9473300

Tony
vaktmesterj
Thanks, but the order was allready shipped, i guess the switch will work if i wire it instead?

I also have a Condor 12vac, 700mA 8.4VA, will it work with the RPSU powering SE330?
Synthbuilder
vaktmesterj wrote:
I also have a Condor 12vac, 700mA 8.4VA, will it work with the RPSU powering SE330?


Probably not. The SE330 requires 15V to 18V AC with a current capacity of at least 550mA if you are using a single output mains adapter (wallwart).

In the UK with our 240V mains supply we can sometimes use 12V wallwarts and get 15V on the output. But in most European countries with only 220V or 230V the output is closer to what it says in the adapter's specification, which probably won't be enough for the SE330.

Tony
Synthbuilder
vaktmesterj wrote:
i guess the switch will work if i wire it instead?


Yes. I do this when the front panel is too thick for PCB mounted switches.

Tony
vaktmesterj
Okay, thank you.

Does the jack need plastic housing?

I have some of theese:

http://export.farnell.com/neutrik/nys229/socket-1-4-jack-panel-mono/dp  /4632655?ost=NYS229&categoryId=700000004946&categoryName=

will they work?

Regarding the front panel, what is the idea thickness for pots etc?
Synthbuilder
The jacks do not have to be insulated plastic types. It does sometimes help when trying to reduce any earth loops but metal sockets will be just fine if wired correctly.

Those mono sockets from Farnell are not to be used though since the SE330 uses balanced inputs and outputs This means it needs three pole types - one earth and two signal poles - sometimes called TRS (tip ring sleeve) or even stereo types.

The ideal pot bush length will vary with the type of panel you are using. Standard Alpha 16mm pots will work just fine with 3mm panels.

Tony
vaktmesterj
Okay got that sorted out, thanks.

Im gonna buy one of these:
http://www.thomann.de/gb/yamaha_pa_20.htm

What kind of socket can i use for the pa-20?

Im about to order panels+case, and leave room for the hvm so i can install that later on.

Stian
vaktmesterj
Nevermind, I Just discovered that you stock the sockets, do you know if farnell has them? Would be great as im about to place an order there.
bachmaninoff
I'm about to start a SE330 build here after the PCBs get here in the mail. I've ordered the BBDs off of Ebay from cabin-globa.

I also see that Altitude909 was nice enough to share a Mouser BOM, so I'm using that as well to order components. I just added green and red LEDs. Still need pots, knobs and an enclosure...

vaktmesterj, would you be able to post photos of your build?
vaktmesterj
Yes i can take some pictures when im done, almost there!

I have a question:

For the RPSU i bought these:
http://www.rapidonline.com/Search?query=11-3560&filterSearchScope=1

They are 50v, but in the builders guide it says 63v, will that be a problem?
Synthbuilder
vaktmesterj wrote:
They are 50v, but in the builders guide it says 63v, will that be a problem?


Anything between 35V and 100V is fine.

Tony
vaktmesterj
Okay thanks!

Was about to mount the pots when i realized i only had the single pots from the "parts guide".

( http://www.rapidonline.com/Search?query=%2065-0725&filterSearchScope=1  )

I cant seem to find the "47k dual gang" anywhere. Anyone got a tips?

Really frustrating, its the last part im missing for completion...
jford
I found dual gang pots 50k (equivalent to 47k) at Banzai. They seem hard to find. Shipping to Aus was not cheap.

http://www.banzaimusic.com/Alpha-16mm-Stereo-Split-Shaft/

j.
Paradigm X
tayda also do them, and for cheap

http://www.taydaelectronics.com/potentiometer-variable-resistors/rotar y-potentiometer/linear/50k-ohm-linear-dual-taper-potentiometer.html
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