SID Pin 28 broken

[Random_hero]

Yesterday I cannibalized a 6581R4 chip out of a C64c but the last pin broke off.

Is that pin used by MidiboxSID?

Or isn't it a problem and can I just use the SID?

[moebius]

Hi.

Whatever "real" PIN number that was, it's used. Now the thing is, how badly it broke off (can you see any metal contact space there, maybe you could solder directly to that) and which PIN is it really.

Moebius

[Random_hero]

According to this sheet it's pin 28.

(click for bigger version)

I can still see the contacts of the pin so I might be able to solder directly a wire to it.

[moebius]

Hi,

You can try. It will need a good (as wide as possible, as good mechanical contact as possible) contact because it's the pin carrying power to the chip.

Good Luck! M

[Artesia]

given that the actual microchip is aa good way in the middle of that lump of plastic ...it wont hurt to take a file to the plastic at the side of the pin & clear away some of it to allow for a good solid connection to the remainder of the pin.

[MMorph]

Greetings,

Yes, You are still able to save the chip indeed! I've done this couple of times in past as well. The plastic cover of the IC is quite soft and you can try to remove it as much as is being necessary to get something soldered to the pin. A file may be ok for this job but I did this with dremel - quick job and more nice looking result IMHO. Just need to be careful.. Good luck!

[Davo]

If you're squeamish about cutting into a SID chip, try this: Take a high-quality DIP socket with machined pins.  Insert the chip into that and  solder a wire from pin 28 to its corresponding socket.  Then plug THAT unit into your SID module.

[Random_hero]

Alright, thanks I'll try my dremel then ;)