I'm using solder pastes available on Polish market, so don't know if you can buy them in the UK. They are Easy Print solder pastes by AG Termopasty.
I have two of these:
Leaded: Sn62Pb36Ag2
Lead Free: Sn96,5Ag3Cu0,5
Search found 261 matches
- Sat Jan 02, 2021 10:23 am
- Forum: ELECTRONICS
- Topic: Voltera printer - the beginning..
- Replies: 60
- Views: 28587
- Fri Jan 01, 2021 11:34 pm
- Forum: ELECTRONICS
- Topic: Voltera printer - the beginning..
- Replies: 60
- Views: 28587
Re: Voltera printer - the beginning..
You are selling these, so I guess you have to use lead-free, to be RoHS compliant. But for prototyping, try leaded. It flows much better, and in lower temperatures. If something goes wrong, you can reflow it, even without adding flux. It also requires much less precision while applying it on the PCB...
- Fri Jan 01, 2021 7:41 pm
- Forum: ELECTRONICS
- Topic: Voltera printer - the beginning..
- Replies: 60
- Views: 28587
Re: Voltera printer - the beginning..
Are you using leaded or lead free soldering paste. From my (small) experience leaded on is much easier to work with.
- Wed Dec 23, 2020 2:06 pm
- Forum: 8 BIT CORNER
- Topic: A little bit of 8 Bit: 65XE upgrade to 128k RAM
- Replies: 65
- Views: 40598
Re: A little bit of 8 Bit: 65XE upgrade to 128k RAM
Have you tested base RAM with something more than a SELF-TEST? MT chips are known to go bad.
Interesting - you have 3 different types of capacitors in RAM BANK 1, and some sockets are rotated by 180°.
Sally (6502C) normally gets quite hot, but it also gets damaged quite often, worth to check.
Interesting - you have 3 different types of capacitors in RAM BANK 1, and some sockets are rotated by 180°.
Sally (6502C) normally gets quite hot, but it also gets damaged quite often, worth to check.
- Tue Dec 22, 2020 2:13 pm
- Forum: 8 BIT CORNER
- Topic: A little bit of 8 Bit: 65XE upgrade to 128k RAM
- Replies: 65
- Views: 40598
Re: A little bit of 8 Bit: 65XE upgrade to 128k RAM
Not MMU, but EMMU. This is how 130XE (ECI) boards were configured for 65XE/800XE computers.
You could also replace the MMU, with another one or a programmed GAL replacement.
You could also replace the MMU, with another one or a programmed GAL replacement.
- Mon Dec 21, 2020 2:18 pm
- Forum: 8 BIT CORNER
- Topic: A little bit of 8 Bit: 65XE upgrade to 128k RAM
- Replies: 65
- Views: 40598
Re: A little bit of 8 Bit: 65XE upgrade to 128k RAM
These "resistors" mounted instead of EMMU are just jumpers (0 Ohm).
- Sun Dec 20, 2020 12:34 pm
- Forum: 8 BIT CORNER
- Topic: A little bit of 8 Bit: 65XE upgrade to 128k RAM
- Replies: 65
- Views: 40598
Re: A little bit of 8 Bit: 65XE upgrade to 128k RAM
Try to remove EMMU and cross-wire its socket, so the computer would behave as it had only 64 kB of RAM, and if it doesn't help, try to substitute MMU with another one or a GAL replacement (in 800 XL it was a PAL chip, so GAL replacement is 100% compatible).
- Sat Dec 19, 2020 10:58 pm
- Forum: 8 BIT CORNER
- Topic: A little bit of 8 Bit: 65XE upgrade to 128k RAM
- Replies: 65
- Views: 40598
Re: A little bit of 8 Bit: 65XE upgrade to 128k RAM
I prefer this test for extended RAM:
https://satantronic.com/files/8bit/tools/XRAM0220.XEX
https://satantronic.com/files/8bit/tools/XRAM0220.XEX
- Sat Dec 19, 2020 3:29 pm
- Forum: 8 BIT CORNER
- Topic: A little bit of 8 Bit: 65XE upgrade to 128k RAM
- Replies: 65
- Views: 40598
Re: A little bit of 8 Bit: 65XE upgrade to 128k RAM
Ok, I own any TMS4164-15NL, are they compatible with the first bank (42164-15) ? By markings, they are ok, but these chips look suspicious to me. Like they were sanded and re-engraved. Do they come from Aliexpress? I had similar glitches in my 800XL, and it was a faulty ANTIC chip (it was working c...
- Wed Dec 16, 2020 10:14 am
- Forum: ELECTRONICS
- Topic: 4 channel scope recommendations ?
- Replies: 19
- Views: 6363
Re: 4 channel scope recommendations ?
If you want to observe just repetitive analog signals, then time equivalent sampling is ok, but if you want to catch a glitch in a digital signal, that occurs once in a few thousands (or more) cycles, then deep memory, and high real time sampling are crucial things to have. This old HP is just "...