These were added to my collection recently.
http://uploads.tapatalk-cdn.com/2017...78c22c4e17.jpg
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These were added to my collection recently.
http://uploads.tapatalk-cdn.com/2017...78c22c4e17.jpg
Sent from my Redmi Note 2 using Tapatalk
ZX Spectrum 48k, which has just had a composite mod and the voltage regulator replaced, now runs nice and cool with a reasonable picture, smashing!
Replaced the 7805 with a Traco Power TSR 1-2450. This is a switch mode direct replacement, 90% efficient compared to the 7805 linear regulator which on a good day is probably only around 45% efficient, with the excess being converted to heat :o, the large metal heat-sink is now redundant. Gutted the RF modulator, added a 100uf 10v cap. Noticed a leaking cap, so replaced that while the soldering iron was out.. job done :D
http://i1342.photobucket.com/albums/...psuwssvam0.jpg
http://i1342.photobucket.com/albums/...psihfhx8kh.jpg
http://i1342.photobucket.com/albums/...pswqzdnujp.jpg http://i1342.photobucket.com/albums/...ps7ozyz9ec.jpg
I just received my Kaypro II today. It's in even better condition than I'd hoped and came with loads of disks and manuals. I even have the unused registration cards for the software and CP/M operating system.
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I also received 100 old single-sided Macintosh floppies I'd bought which have a lot of software on them for my old Mac.
Not many local pickups come my way....
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Hi wmsteele,Quote:
Originally Posted by wmsteele
the capacitor is connected the wrong way around! The negative of the capacitor should be going to the socket, not the positive!
While you're at it, the capacitor should also be a slightly higher value, you'll get the best results at around 220µf. You should also put a 75ohm resistor in series with the capacitor (between capacitor and socket) to terminate the connection properly.
Bryce.
@Bryce, thanks for the heads-up, will sort this out tonight :thumbsup:
After being told by a fellow collector that he was at an estate sale and picked up three Macintosh machines complete, I decided to go myself.
I picked up a few things....
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It's all untested so far and there's even more TI/99 stuff. The line scanner and the new in box 8" floppy drive are the most interesting.
Lots of work ahead to sort all this . :)
Went to Computer Surplus in Redmond and found this thing for the best price in the world, just needs the DB-9 female right angle connector in back repaired, something I"m working on myself ATM. It's a NEC MultiSync II 14" CRT, and it came complete with what I assume is the original cable, and the 9-pin to 15-pin multisync converter. Tried it on the 486, does have some color/sync problems because if I wiggle the connector and hold it in just the right spot it works, but if I let go it either loses image or turns green. I've traced it to the connector. I also see a little brown around it, but I'll fix that.
Attachment 116775
Also got all this stuff from a haul from the two RE-PC Stores in my area, stocking up on ISA as much as I can because that stuff is getting hard to find. Was hoping to find a nice baby AT lay-flat desktop or at least a tower of that type in my travels, but oh well. Did find a backup AT PSU for my full AT chassis though.
GOT THE FOLLOWING
IN WIN IW-D500G.240FU2A Beige Steel MicroATX Desktop Computer Case 240W Power Supply
GEneric 200 Watt AT Desktop PSU
2 Aztec SoundCards (ISA)
2 SMC NIC (ISA)
Aztec Soundcard (ISA)
Linksys EtherFast NIB Sealed (ISA)
Winbond VLB Local Bus I/O Controller Card (VLB/ISA)
Cooler Master Thermal Unit
Some sort of hand-held Driving Controller
SIIG PCI Sound Card
SIIG PCI USB 2.0 Card w/ internal port
SoundBlaster LIve LS w/ LiveDrive Module w/ Cable
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My latest addition :-)
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