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Elemenoh, Great job on those metal parts! I was also thinking about powder coating or spray paint till I seen you photos. Rick

Solved. I'm posting the results of my troubleshooting should someone else have this error. Symptom was intermittent floppy disks write errors while trying to format, or during floppy disk apple diagnostics. The write signal (WR) voltage level was low (~3.6vdc square wave) vice the proper...

Would someone be helpful and take a voltage reading with your O'scope for me? I need to know the voltage amplitude of the External Floppy Jack J6- pin 19 (Attachment refers), while formatting a floppy. My O'scope is reading 3.6vpp.  Thank you Rick

I have the same problem.

JDW, I followed your CR44 recapping video to refurbish my power supply. Easy day! Thank you for producing the video, it was very helpful. Rick

JDW, Thank you for the detailed technical reply. I’m going to proceed with the re-capping project. If I have problems afterwards, I explore making a dummy load as you suggest. Thanks again. Rick

JDW, I'm getting ready to re-cap a CR-44 power supply I purchased on eBay. Prior to re-capping I wanted to bench check output voltages. The 5vdc output is fine; however the 12vdc is reading 13.9vdc and -12vdc reads -9vdc.   Question: Can the +/-12vdc outputs be read if the power supply is...

ironborn65, Did you ever get your power supply issue solved?

Thanks cheesestraws.  Very sad. Rick 

I’ve noticed that the MemoryX website has been down for the last month. Have they went out of business?

And the answer is....U10 EGRET chip.  Another custom Apple chip.

I’ve recapped my early version motherboard and replaced the PRAM battery. However I’m still seeing the loss of time, date and mouse settings when the classic is turned off. I have checked the battery voltage back to chip U12 pin 7, then to pin 12 on the EGRET chip. That path is good.   ...

I solved this issue by buying an apple 600e CDROM drive.  I downloaded and burnt a CD on my WIN10 machine, transferred it to the 600e.  Problem solved. Thanks for all the input. Rick

Thank you for all the advice. I’ll need to research my options.  Merry Christmas  Rick

Seeking some advice on how to download files larger than 1.4MB from the web (Mac Repository or Macintosh Garden).  I'm running into the 1.4MB "Floppy bottleneck". Meaning how do I get larger compressed files that won't fit on a floppy disk onto my Classic II hard drive? Thank you

Thank you!

Hello, Has anyone found a source for the 68 pin 256k VRAM SIMM apple p/n 661-0722? The SIMM is used to upgrade the video ram from 256k to 512k. Thank you, Rick

I ended up buying 4x16Mb SIMMs from OWC. The SIMMs fit perfectly and the memory is running great! I would highly recommend them to anyone upgrading their SE/30. Rick

Thank you!

I recall from my Apple II days that several programs, or firmware allowed you to inspect the contents of memory. Does that capability exist for the Macintosh 68k family? thank you, Rick