mr c deckard wrote:

i posted about this a few days ago: i hooked the pr99 up to a scope,
and the phase at 16khz "warbles" by as much as 90degs . . . is this at
all normal? i get a new pinch roller tomorrow, but i swapped it out
for another one, and it still didn't really improve.

when i look closely at the tape, it shifts up and down as it goes
across the heads ever so slightly. i can't seem to figure out what is
causing it. i pulled back the pinch roller, but it still does it . .

Il Manuale will help you and so will experience in getting a tape path
right. I don't have picture perfect 16 kHz stability on my Revox A77 but
that is because the IDIOT who converted it to 15" couldn't drill a
straight hole and thus caused the capstan axis to tilt. Unfortunately I
didn't find that out when it mattered. Strangely the people who fought
with adjusting it also didn't grasp that something so basically wrong
was the cause of the transport being less good that usual for the
pedigree. I am not suggesting that something equally severe is wrong
with your machine, but a tape path adjustment problem does appear to
exist. First get a service manual prior to doing anything else. Next get
a degausser so that you have demagged tools.

thanks,
chris


Kind regards

Peter Larsen

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