Search found 22 matches

by paul ron
Mon Mar 18, 2019 2:40 pm
Forum: Hardware
Topic: ZX81 pulse cleaner article
Replies: 5
Views: 233

Re: ZX81 pulse cleaner article

Very interesting magazine. I always enjoy the circuits. The direct modem hookup project was an interesting read. What we did back before modems to transfer programs was hook the OUT jack to an audio transformer which was wired into the telephone speaker mic. On the other end, the recipient would hav...
by paul ron
Mon Mar 18, 2019 2:26 pm
Forum: Hardware
Topic: Cleaning ZX81 16k RAM pack and edge connector
Replies: 2
Views: 161

Re: Cleaning ZX81 16k RAM pack and edge connector

To clean female edge connectors that are heavily oxidized, I fold a piece of wet dry 400 abrasive paper to form a male and push it in n out a few times.

Cleaning the males, use a pencil eraser n go over the fingers till they are nice n shinny again.
by paul ron
Mon Mar 18, 2019 2:17 pm
Forum: SALES
Topic: Memory ICs
Replies: 0
Views: 167

Memory ICs

While cleaning out my electronics bench I came across a box of memory chips. I don't have a need for them but I would like to offer them real cheap to anyone that has a use for them. I got them at a Trenton NJ computer show in the 1980s. Im not sure if I ever used them. Corrected count...... 4264-15...
by paul ron
Mon Feb 05, 2018 6:59 pm
Forum: Hardware
Topic: Source for 40pin DIP Heatsink?
Replies: 9
Views: 1208

Re: Source for 40pin DIP Heatsink?

don't forget to buy some of that heat transfer cream.
by paul ron
Fri Jan 12, 2018 6:55 pm
Forum: Development
Topic: old magazine article -- interesting ! ??
Replies: 15
Views: 1953

Re: old magazine article -- interesting ! ??

very nice. thanks for posting it.
by paul ron
Thu Dec 07, 2017 2:21 pm
Forum: Hardware
Topic: Another Video Convertor
Replies: 5
Views: 1189

Re: Another Video Convertor

where can you get these?
by paul ron
Thu Nov 02, 2017 2:03 pm
Forum: Sinclair Misc
Topic: Water Cooled ZX81
Replies: 9
Views: 1727

Re: Water Cooled ZX81

HAHAHHAHhahahahahahaha now Ive seen it all!

:lol:
by paul ron
Thu Nov 02, 2017 1:57 pm
Forum: Software
Topic: HOT-Z Keys
Replies: 32
Views: 5778

Re: HOT-Z Keys

My EPROM burner isnt working because I dont have software to run it but if someone in NYC will read them... Id be glad to dump them for ya.
PSEPROMS.jpg
PSEPROMS.jpg (413.06 KiB) Viewed 734 times
by paul ron
Thu Nov 02, 2017 1:33 am
Forum: Software
Topic: HOT-Z Keys
Replies: 32
Views: 5778

Re: HOT-Z Keys

what a coinkydinky... i was going through some old eproms. one of them is HOT-Z.
by paul ron
Tue Oct 31, 2017 12:09 am
Forum: Welcome Area
Topic: Greetings from Finland
Replies: 4
Views: 1009

Re: Greetings from Finland

then after you retire, plenty of time to play with your old toys but you will discover your toys are missing the important parts to make them operate.