Re: Why are capstan wheels different size?

From	N_Cook <diverse@tcp.co.uk>
Newsgroups	sci.electronics.design, sci.electronics.misc, sci.electronics.repair
Subject	Re: Why are capstan wheels different size?
Date	2016-03-12 10:38 +0000
Organization	A noiseless patient Spider
Message-ID	<nc0rdc$u5e$1@dont-email.me> (permalink)
References	<0001HW.1C936E810003F2001244403CF@news.eternal-september.org> <nbvgli$bit$1@gonzo.alcatraz> <0001HW.1C93C9410019373E1244403CF@news.eternal-september.org>

Cross-posted to 3 groups.

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On 12/03/2016 03:49, DaveC wrote:
> Jasen Betts asked wisely:
>
>> do they have the same capstan diameter?
>
> I was just about to say “Silly question!” but instead thought better...
>
> one 2mm, one 2.2mm
>
> I guess the difference is driven (c; by the fact (stated by Phil) that the
> flywheels are different diameters to discourage mechanical resonance.
>
> Thanks Jasen!
>
May seem pedantic , but there is a rationale.
Having been here before, to standardise to using a strobe to set tape 
speed, in the absence of a test tape of known goodness, ie not 
stretched, as the people wanting cassette players repaired these days 
tend to be musically on the ball as regards being perfect pitch.
You'll probably find the spindle diameters are 1.99mm and 2.19mm .
I got a precision mechanical engineer to measure a dozen or more random 
spindles and they were all *.*9 mm , presumably because the available 
bearings are *.*0 mm

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Thread

Why are capstan wheels different size? DaveC <not@home.cow> - 2016-03-11 13:22 -0800
  Re: Why are capstan wheels different size? Jasen Betts <jasen@xnet.co.nz> - 2016-03-11 22:25 +0000
    Re: Why are capstan wheels different size? DaveC <not@home.cow> - 2016-03-11 19:49 -0800
      Re: Why are capstan wheels different size? N_Cook <diverse@tcp.co.uk> - 2016-03-12 10:38 +0000
  Re: Why are capstan wheels different size? M Philbrook <jamie_ka1lpa@charter.net> - 2016-03-11 18:08 -0500
    Re: Why are capstan wheels different size? Les Cargill <lcargill99@comcast.com> - 2016-03-11 17:34 -0600
    Re: Why are capstan wheels different size? MJC <gravity@mjcoon.plus.com> - 2016-03-11 23:48 +0000
  Re: Why are capstan wheels different size? Tim Wescott <seemywebsite@myfooter.really> - 2016-03-11 22:35 -0600
  Re: Why are capstan wheels different size? Look165 <look165@numericable.fr> - 2016-03-12 09:36 +0100
    Re: Why are capstan wheels different size? mike <ham789@netzero.net> - 2016-03-12 02:34 -0800
      Re: Why are capstan wheels different size? M Philbrook <jamie_ka1lpa@charter.net> - 2016-03-12 15:11 -0500
  Re: Why are capstan wheels different size? N_Cook <diverse@tcp.co.uk> - 2016-03-12 17:37 +0000
    Re: Why are capstan wheels different size? legg <legg@nospam.magma.ca> - 2016-03-12 13:06 -0500
      Re: Why are capstan wheels different size? John Larkin <jjlarkin@highlandtechnology.com> - 2016-03-12 12:19 -0800
        Re: Why are capstan wheels different size? Martin Riddle <martin_ridd@verizon.net> - 2016-03-12 15:21 -0500
        Re: Why are capstan wheels different size? DaveC <not@home.cow> - 2016-03-12 13:04 -0800
        Re: Why are capstan wheels different size? legg <legg@nospam.magma.ca> - 2016-03-13 10:18 -0500
          Re: Why are capstan wheels different size? MJC <gravity@mjcoon.plus.com> - 2016-03-13 15:34 +0000
            Re: Why are capstan wheels different size? Don Bruder <dakidd@sonic.net> - 2016-03-13 09:22 -0700
              Re: Why are capstan wheels different size? N_Cook <diverse@tcp.co.uk> - 2016-03-13 19:50 +0000
            Re: Why are capstan wheels different size? legg <legg@nospam.magma.ca> - 2016-03-13 14:22 -0500
            Re: Why are capstan wheels different size? Chris Jones <lugnut808@spam.yahoo.com> - 2016-03-14 10:32 +1100
  Re: Why are capstan wheels different size? Look165 <look165@numericable.fr> - 2016-03-13 19:48 +0100

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