New batch of boards for prototyping

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By Wierzbowsky

Guardian (3526)

Аватар пользователя Wierzbowsky

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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By Wierzbowsky

Guardian (3526)

Аватар пользователя Wierzbowsky

25-06-2017, 14:19

6 boards left...

By msxholder

Champion (399)

Аватар пользователя msxholder

05-07-2017, 10:12

Hey it's more than a two layer.

By raulsantacruz

Hero (604)

Аватар пользователя raulsantacruz

05-07-2017, 12:44

Hi Alexey!,

I want two ones! are they Still available?

By Wierzbowsky

Guardian (3526)

Аватар пользователя Wierzbowsky

06-07-2017, 14:23

@msxholder, no it's 2 layer only

@raul: please send me a PM

By switch

Resident (44)

Аватар пользователя switch

06-07-2017, 15:17

Hi Alexey! Check your mailbox, Riekie.

By Wierzbowsky

Guardian (3526)

Аватар пользователя Wierzbowsky

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.

By raulsantacruz

Hero (604)

Аватар пользователя raulsantacruz

06-07-2017, 19:47

Email sent!

By geijoenr

Champion (352)

Аватар пользователя geijoenr

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.-

By Wierzbowsky

Guardian (3526)

Аватар пользователя Wierzbowsky

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.

By Edevaldo

Master (143)

Аватар пользователя Edevaldo

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.

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