... Mine are original 26-9100 220-240V type and specifies 21.2V AC 1A and 17.6V DC 350mA measuring 4 to 3 is 24V DC without load measuring 1 to 5 is 25.9V AC...
We used to build replacement ones in New Zealand as the originals used to smoke out on 110 volts at 50 cycles (they were OK at 100 volts). If there is enough...
Hey guys, I have two Model III's. One I bought new in April 1982 and the other was bought on ebay, mostly as a parts backup Both failed; number 1 after 22...
Hello, Does anyone out there have a circuit diagram for the Model I version of the Alpha Products Newclock-80? I've come across a supply of the old MSM5832...
I could use them... one of mine is starting to make odd noises, so replacement is inevitable. Would you please post them as a message or in the "Files" section...
... and ... lot ... turns ... 0xC0- ... (hardware ... whether ... to ... Just out of curiosity, how long was the cable between your adapter and the EI? If it...
IIRC, these weren't primo products. You could try Jameco or similar for a whole new PS - might be chealer and easier. Neil ... From: jim unger Hey guys, I have...
... Larry, Yeah, I thought of that... the cable I was using when I was having these problems was about 3 feet long. I cut it down to 2 feet and still had the...
How about this idea: wire in a PC XT/AT supply. They should be dirt cheap, and all the heat and hassles of regulation are outside of your Model I. Not too...
Hi All, If you don't fancy modifying your Model-1, something like an M6672 transformer (around $12AUS) can easily be wired up. 20V AC across pins 1 and 3 of...
Neil, you are right. The original Model III power supply boards were NOT primo quality. You are also right that they could be replaced by some modern PC power...
... Pete, I was refering to the adapter-EI length. I can run a 4-foot cable from the host adapter to the WD1002, but need to stay very short on the EI-host...
Larry, Thanks for the clarification. I don't use a buffered EI cable since I have the rev D EI. My keyboard->EI cable is maybe 4 inches long, and my...
... fine providing you can get 12V to your board. ... Mike, Yeah, I saw that. But I was wondering how the original Newclock-80 worked... it only has 5V from...
The Model III has plenty of extra room inside. As long as you go with a small board, it should fit in place of the original. If not, there's plenty of...
... Hmm, I remember doing this to a Model 4D years ago. I had a pair of external 8 inch drives that needed a fairly hefty amount of +5V through the ribbon ...
It's also worth reminding people that the CRT has a fair amount of static on it, so beware of putting anything sensitive under it. The static charge can...
Howdy, I just uploaded a bunch of files related to a PC to TRS-80 interface that I use regularly, in a folder called "PC Parallel Port Interface". It's a heck...
... Dear Pete, Thanks for doing this - it's good to see some work still being done to keep these old workhorses useful, as more than just hobby pieces. I'm...
... to ... Anthony, Thanks for your comments. I tried to set up serial comms using the Radio Shack RS-232 board that fits in the expansion interface, but...
... to ... Hi, Some time ago i experimented also with the RS232 interface (built myself but sw compatible with the TRS version in the EI). Although it worked i...
Related to the parallel printer thread..In short, one installs a board into an Epson printer. Proper installation will allow TRS-80 to print from the Expansion...
So, what is your question? Are you looking for such a thing? Tandy had such a board, that connected to the Expansion port of the TRS-80 (model I) on one side...
So I've been collecting, First a have a fully functional Mod IV (big deal) Now (after some restoration) I have a fully functional MOD I (48K, 2 Disk, RS232)...
My latest addition came with a LN Doubler, although NewDos80 loaded fine, it seemed to cause problems with TRSDOS 2.3 and LDOS 5.3.1 In addition, it allowed...
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