New batch of boards for prototyping

Door Wierzbowsky

Guardian (3608)

24-06-2017, 17:45

A new batch of MSX boards for prototyping is available:

The price is 5 euro per board + 5 euro packing/shipment (7 euro with tracking). Only 8 boards are left.

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Van Wierzbowsky

Guardian (3608)

25-06-2017, 14:19

6 boards left...

Van msxholder

Champion (399)

05-07-2017, 10:12

Hey it's more than a two layer.

Van raulsantacruz

Hero (604)

05-07-2017, 12:44

Hi Alexey!,

I want two ones! are they Still available?

Van Wierzbowsky

Guardian (3608)

06-07-2017, 14:23

@msxholder, no it's 2 layer only

@raul: please send me a PM

Van switch

Resident (47)

06-07-2017, 15:17

Hi Alexey! Check your mailbox, Riekie.

Van Wierzbowsky

Guardian (3608)

06-07-2017, 17:53

Riekie, saw your mail. Will reply soon. I need to see how many boards are left. I think 3 or 4 maximum. But if there's a large demand I can make another batch.

Van raulsantacruz

Hero (604)

06-07-2017, 19:47

Email sent!

Van geijoenr

Champion (366)

28-07-2017, 13:31

Alexey,
I have noticed the boards are around 2 mm too long on the slot connector; they don't fit well in a Sony F1 XV and I had to cut them a bit.

please take that into account if you make another batch.

E.-

Van Wierzbowsky

Guardian (3608)

31-07-2017, 03:24

Thanks. I also noticed this recently. I didn't change any sizes of the board, the previous board fit perfectly. Could be the factory that screwed up the sizes.

Van Edevaldo

Master (154)

18-11-2018, 18:34

Alexey, what is the material of the slot fingers (contacts)?

Normal solder/lead deposits over the slot connector contacts and oxidize over time causing poor contact. I do not know if this is "cleanable". Considering the prices of MSX machines nowadays I would stay away from that.

The recommended finish for the slot contacts is hard gold. It resists hundreds of insertions and do not compromise the slot connectors. But it is more expensive. As far as I can tell it is hard to get a PCB like that with hard gold finish for less than US$10 in small quantities. I'm looking to make some Konami size prototype cards in that way, but 50 PCBs would cost about US$8 or so. And 5 PCBs would cost as much as US$32 each.

ENIG (immersion gold) is not more expensive than the lead finish, but I heard it scratches too easily and a few slot insertion already remove it. I never tried. But is seems it is not an option.