According to the measured spectrum of wow/flutter - pinch rollers, especially left one - is recommended to be replaced. 0.025-7 WRMS shown by NAK T100 - is a good result, obviously, but not a lower limit for the Dual DD mechanics. Probably, the left flywheel is not balanced well, but may be known only after setting a new good pinch roller. I've also found that for real use cases this soft is quite overestimates the real wow/flutter readings, so for more accurate measurements WFGUI is better, anyway - NAK T-100 is useful for the real-time wow/flutter spectrum analysis. JFYI, what is the speed difference between capstans ? 0.2 or 0.4 %?
That deck had a huge issue with W&F which was not obvious during initial testing. Long run test discovered that W&F can go so bad, that deck even may stop. Keep watching!
@@maxfactor4209 I believe this deck was just running day and night in auto reverse mode. Head wear and bearing wear was far above I have seen anywhere. I had to replace bearings stands in this deck. Unfortunately there is no chance to find a better head.
@@hifirulezzz it is clear. During bearing installation - it is necessary to control that they don't sit too tight. Otherwise - the capstans will be clamped by bearings upon the deck heating. It is necessary to control flywheel rotation inertia during plug off the device from a/c. I have some experience in bearing replacement, so already faced with that.
![If you can't hear this then you're not an audiophile [See description for link to followup video]](http://i.ytimg.com/vi/48PxwspDvrE/mqdefault.jpg)
maybe u could try relapping the pb head?
or is the gap "opening" up?
as you may see it is already huge and open :(
According to the measured spectrum of wow/flutter - pinch rollers, especially left one - is recommended to be replaced.
0.025-7 WRMS shown by NAK T100 - is a good result, obviously, but not a lower limit for the Dual DD mechanics.
Probably, the left flywheel is not balanced well, but may be known only after setting a new good pinch roller.
I've also found that for real use cases this soft is quite overestimates the real wow/flutter readings, so for more accurate measurements WFGUI is better, anyway - NAK T-100 is useful for the real-time wow/flutter spectrum analysis.
JFYI, what is the speed difference between capstans ? 0.2 or 0.4 %?
That deck had a huge issue with W&F which was not obvious during initial testing. Long run test discovered that W&F can go so bad, that deck even may stop. Keep watching!
@@maxfactor4209 I believe this deck was just running day and night in auto reverse mode. Head wear and bearing wear was far above I have seen anywhere. I had to replace bearings stands in this deck. Unfortunately there is no chance to find a better head.
Factory value set for a difference is 0.3%, I did not change that.
@@hifirulezzz it is clear. During bearing installation - it is necessary to control that they don't sit too tight. Otherwise - the capstans will be clamped by bearings upon the deck heating.
It is necessary to control flywheel rotation inertia during plug off the device from a/c.
I have some experience in bearing replacement, so already faced with that.
@@puremagnetics I replaced both stands with bearings.