The Sinclair QL Forum

Your MDV2_ seems on average a bit slower, is that your star performer? Usually it is the drive mounted as MDV1_ , as MDV2_ picks some noise in the QL case, the QL board is a subject to applying the documented mod for better drive performance. Thanks for your comments. So did you apply the famous &q...

I finally succeed in demagnetize my mdv heads, so I'll run your speed test soon So here are the values for my staight-edged microdrive units (seconds/rpm). Cartridge A , first run: mdv1 -> 6.75/2396 mdv2 -> 7.5/2156 Cartridge A , second run: mdv1 -> 6.75/2396 mdv2 -> 7.25/2230 Cartridge B , first r...

Great job Daniele.
The emulator runs perfectly. It also maintained the previuos presets I prepared. Thanks!

For me is crystal-clear now. Thank you very much Martin!

Excellent, how did you manage to demagnetise, as that is something I have not tried yet? A friend of a friend of a friend of mine came with something similar to this: https://www.3345rpm.gr/wp-content/uploads/2015/04/Tape-Head-Demagnetizer-3345rpm.gr_.jpg Surely the heads were already partially mag...

Of course I did'n get the super performance with all my tapes. Probably I have some "lucky" cartridge.
Can you tell me please which software did you use for this test?

P.S.
I finally succeed in demagnetize my mdv heads, so I'll run your speed test soon

Thank you Martin for your explanation. Learning something is always important for me.

Is this stuff still available?

1024MAK wrote:As I said above, you would need two transformers.
One with a 15V secondary

On the contrary, the service manual says: "supplies 9 volts d.c. at 2 amps and 44 volts peak-to-peak a.c. to the board input on connector". Is this a mistake (or a big misunderstanding of mine)?

tetroid wrote: to check the original SGC in working order.

Will your check be invasive? If you can ensure your check will not affect the board integrity, maybe someone could lend you his supergoldcard...