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Part Sourcing Assistance/Advice Thread


n_maher

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Damn, just ordered most of the parts (everything minus transistors which are coming from AMB) for my Dynalo + Sigma 22 build. It was surprisingly tiring! I can't imagine ordering parts for the more advanced builds. Must be a many day affair.

I should be able to get that thing together by this weekend. Assuming I don't mess anything up too badly.

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  • 2 weeks later...
  • 3 weeks later...

A few beginner questions-

1. Is there any advantage in using dual pole mains switches?

2. When soldering through hole parts onto a both-sides-plated PCB is it important to have neat concave solder spots on both sides?

3. If some parts happen to stand quite high from the PCB, should I make an effort to push them as close to the plate as possible? Some of my Dynalo resistors are standing unevenly and frankly I hate how that looks. Common sense tells me that doing so may minimize signal path.

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2. Apply some flux to the join, (I use a flux pen), heat the join up sufficiently (approx 2 sec) before applying solder. You should have a nice smooth neat concave join on both sides of the PCB.

Not super important but something to aim for, the success rate gets higher with practice.

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Have you thought about using something like this?

http://m.markertek.com/product/detail/http:%7C%7Cwww.markertek.com%7Cmobile%7CConnectors-Adapters%7CAudio-Connectors%7C3-5-2-5mm-Mini-Connectors%7CConnectronics%7CTN-MFS.xhtml

The jack itself is most likely threaded for attaching into the shell. Remove the shell, tap the panel appropriately, screw it directly into the panel. Perhaps a dab of loctite to keep it secure.

Just a thought....

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For $3, you aren't risking much.

I'm pretty sure this is how this business works. If shipping won't be too long then I'll bite.

Edit: Damn, shipping is more than two weeks. I'll pass. One of the local guys had bad luck with this seller.

Edited by RudeWolf
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Let me see what I have laying around...

I don't know what shipping would be like, but Mouser has the Fairchild version of these for 7 cents apiece, or 3.7 cents in 100. Unfortunately, they don't have the GR grade in the C1815 NPN.

http://www.mouser.com/ProductDetail/Fairchild-Semiconductor/KSA1015YTA/?qs=ljbEvF4DwONgdKizIuxI5UKMGOiR5dCFrGZORl6qhPg%3d

http://www.mouser.com/ProductDetail/Fairchild-Semiconductor/KSC1815YTA/?qs=ljbEvF4DwOPz7O2KUMOsr34RMcYiO0wN

MCM has them for 5 cents:

http://www.mcmelectronics.com/product/2SA1015

http://www.mcmelectronics.com/product/2SC1815

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Probably not. GR would be preferred because of the higher hFe (not sure why)?

Note: hFE (1) classification O: 70~140, Y: 120~240, GR: 200~400

Not sure who the preferred Euro suppliers are. I see Dalbani has them in GR:

http://www.dalbani.com/CGI-BIN/LANSAWEB?WEBEVENT+L062A634E589221006B28003+M36+ENG

Edited by Pars
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My preferred suppliers would be Farnell and Elfa Distrelec but none of them seem to carry it.

As I said two of the local electronics stores have them but I have a bad feeling that they get them from ebay. Some of the local diy-ers who bought transistors from them got fakes.

In any case I'm in progress of doing a full transistor test on my Dynalo.

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anyone knows where to get 512-KBU4M (Fairchild Bridge Rectifier)? it's non-stocked on both mouser and digikey and will only be shipped at >200.

I was going to use the Vishay alternative 625-KBU4M-E4, and it was in-stock when I checked few days ago, but now it's 7 weeks backordered. comp26.gif

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