[BC] Cassette deck maintenance

[Cowboy]

On Wednesday 17 February 2010 11:23 pm, Jeff Glass wrote:

>  This makes no sense. I agree with Steve and Dave Dybas. If you record a 
>  tone of 1 kHz at 7.5 ips, it will play back on-frequency only if it's 
>  played back at 7.5 ips. If you have a machine that you want to run 1-7/8 
>  ips and it's really running at 1.5 ips, what do you think a tone is going 
>  to sound like if recorded at 1.5 ips and played back at 1-7/8?     

 Obviously, if one is comparing a KNOWN reference tape recorded
 at a known 1 kHz to a known accurate 1 kHz oscillator, the theory holds.
 If 1 kHz is recorded at a KNOWN 1-7/8 IPS, it can only be 1 kHz when
 played back if the playback machine is also 1-7/8 IPS.

 The nice thing about a standard 1K, is that the measured output
 frequency tells you directly how much the speed error is on the 
 playback machine ! 

 The criticism is correct in *it's* understanding, that if 1 kHz is fed into
 a machine at any speed, and that tape is played back at that same
 speed, the output will be 1 kHz and tells you nothing other than that
 record and playback are at the same speed, whatever it is.

-- 
Cowboy