Load64

The NOS datasette came in.

So far so good. It loads my Excaliba copy just fine.

Doing test runs with some of the tap images I have been using seem to be working fine as well.

Oddly enough, the tape that I recorded using my Eiki recorder didn't actually work in the NOS datasette, so this one must be way more sensitive than the Commodore one.

At least I can confirm that your adapter does work just fine with a Data-Master model 5500.

Edit:

I readjusted my 1530 to be able to read the NOS datasette recorded tape. It appears to be working ok, so I think I have my solution.

I used the same tap file that produced the wav that I posted before. Maybe that's a clue. There has been a couple of times that my datasette has slowed or stopped when rewinding while powered by the adapter, but it doesn't happen consistently (and not at all when powered by my Commodore 128)

I do have another datasette (that hopefully works this time) that I'm going to try. If it does, I'll use that one for recording and the one I'm using now for playback since that part seems to work just fine.

Here is a copy of the tap recorded to tape with my datasette through the adapter and then read back in Audacity.

Apologies for the extra at the beginning and end. I forgot how long the playtime was supposed to be.

https://www.mediafire.com/file/9b0hyj7vyeu4llz/recorded_impossible.zip/file

Edit:

The fun part of this is that this copy fails at different points sometimes. I just got it to get to roughly 50 blocks left to load and it crashed. Rewinding and trying again, it fails to get past the Novaload screen. It's wildly inconsistent.

Here is the wav of the TAP file that works when recorded outside of the datasette and does not work when recorded with the datasette.

https://www.mediafire.com/file/t6j4zk679zxonw5/impossible.zip/file

No need for a refund. I'd rather support your efforts even if it didn't work out for me. It clearly works for others.

I'll keep it around and maybe try a different datasette in the future.