Hi Mark,
Just removed TR4, and I get Open Circuit on all combinations. Occasionally I get a very high (5 MOhm) reading, but never consistent, and usually flashes straight to open. If it was working, what would removing TR4 result in?
Cheers,
Simon
Search found 64 matches
Re: Coils….
BTW it was my daughter holding the probes, with her yellow nail varnish!
Re: Coils….
Hi Mark Yes, I’m testing using two multimeters (one manual, the other auto-ranging), and off the board the coils are all fine. They look good as well, and I can see no damage to the wires connecting to the pins. However, I have just tested the board, with the coil removed, and that is where the prob...
- Sun Aug 07, 2022 5:56 pm
- Forum: Hardware
- Topic: Building a ZX Spectrum 3B, Looking for Parts
- Replies: 6
- Views: 3836
Re: Building a ZX Spectrum 3B, Looking for Parts
Hi DistantStar,
I was wondering whether you ever resolved your coil query, as I’ve been doing a similar build, and was wondering about alternatives to the original coils….
I was wondering whether you ever resolved your coil query, as I’ve been doing a similar build, and was wondering about alternatives to the original coils….
Coils….
I have about 4-5 coils from Spectrums that seem to be fine when tested for the resistances when not in circuit (open between, minimal/zero within windings) , but when I solder them into place onto a board I lose the open circuit between windings. I have checked for sloppy soldering or splash, and ha...
- Thu May 26, 2022 8:16 pm
- Forum: ZX Spectrum Lounge
- Topic: ZX Interface 1, DivMMC and Multiface 128 query
- Replies: 1
- Views: 2213
Re: ZX Interface 1, DivMMC and Multiface 128 query
Aha! I have now been able to answer this one, with the help of this excellent resource:
https://www.bytedelight.com/?page_id=3605
Hmmm…. thinking of different ways to do this now….
https://www.bytedelight.com/?page_id=3605
Hmmm…. thinking of different ways to do this now….
- Wed May 25, 2022 10:33 pm
- Forum: ZX Spectrum Lounge
- Topic: ZX Interface 1, DivMMC and Multiface 128 query
- Replies: 1
- Views: 2213
ZX Interface 1, DivMMC and Multiface 128 query
I’ve finally got close to my perfect ZX Spectrum setup: My original 48k rubber key Speccy, refurbished with s-video output ZX Interface 1 and some microdrive units ZX Interface 2 and a RAM Turbo (not relevant to this post) Multiface 128 Now, I have been using the Multiface to create images of games ...
- Fri May 13, 2022 2:15 pm
- Forum: Hardware
- Topic: ZX Interface 1 issue
- Replies: 10
- Views: 2965
Re: ZX Interface 1 issue
Curiouser and curiouser…. So, after a bit of thinking on the responses to my post, I tried the new Z80s that did not detect the ZX interface 1 or microdrives, and therefore suspected of having a broken M1 line with another Spectrum. Again, no joy with Interface 1, but I tried my DivMMC Enjoy! as wel...
- Thu May 12, 2022 9:06 pm
- Forum: Hardware
- Topic: ZX Interface 1 issue
- Replies: 10
- Views: 2965
Re: ZX Interface 1 issue
UPDATE: Okay, I now have Interface 1 working, and loading micro drives very happily..... BUT... None of my modern Zilog Z80's would page ZX Interface 1, and the one that is working quite happily dates from 1986... And I tried 3 new Z80s! Curious, as I thought the newer ones were supposed to be much ...
- Thu May 12, 2022 6:51 pm
- Forum: Hardware
- Topic: ZX Interface 1 issue
- Replies: 10
- Views: 2965
Re: ZX Interface 1 issue
Ironically, I think that is where the chip might have come from! Not to worry, I’ve got a boxful of Z80s, I’m sure I’ll find one. Just in case, is there anything else that could cause this issue? I’ve cleaned and re-tinned the edge connector, and I don’t think there is any solder splash or similar, ...