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On Sat, 9 Jan 2010 16:49:39 -0800 (PST), Eli Luong
eliluong@gmail.com> wrote:
Hello - I am trying to repair a broken cassette player (dual-deck, one
of the larger cables that connectors to the motor is broken). I
measured it to be about 20cm or 8in. I found this website for parts:
http://www.studiosoundelectronics.com/cassette.htm
But I'm not sure what to choose exactly. They said to account for
stretch (measured the 20cm w/out stretch), but then they have 1) flat
belts, 2) square belts, 3) square belt small types. From what I can
see on my broken belt, it appears to be square shaped, 1mm in
diameter. Any guidance, please?
Thanks,
- Eli
A word of caution. We discovered years ago that using PRB square
belts would greatly increase the deck's wow and flutter so I would
avoid them. Chuck
Chuck wrote:
On Sat, 9 Jan 2010 16:49:39 -0800 (PST), Eli Luong
eliluong@gmail.com> wrote:
Hello - I am trying to repair a broken cassette player (dual-deck, one
of the larger cables that connectors to the motor is broken). I
measured it to be about 20cm or 8in. I found this website for parts:
http://www.studiosoundelectronics.com/cassette.htm
But I'm not sure what to choose exactly. They said to account for
stretch (measured the 20cm w/out stretch), but then they have 1) flat
belts, 2) square belts, 3) square belt small types. From what I can
see on my broken belt, it appears to be square shaped, 1mm in
diameter. Any guidance, please?
Thanks,
- Eli
A word of caution. We discovered years ago that using PRB square
belts would greatly increase the deck's wow and flutter so I would
avoid them. Chuck
PRB has been gone for a long time. They were bought by Russell
Industries.
--
Greed is the root of all eBay.
I can't tell if it's relevant here, but...On Sat, 9 Jan 2010 20:46:07 -0800 (PST), "hr(bob) hofmann@att.net"
hrhofmann@att.net> wrote:
On Jan 9, 8:37 pm, Eli Luong <elilu...@gmail.com> wrote:
On Jan 9, 5:46 pm, "Arfa Daily" <arfa.da...@ntlworld.com> wrote:
This is not a problem with a telephone answering machine, where speed is not
important, but it is with an audio cassette deck. It is especially a problem
if it is a dual deck machine, but driven by a single motor. If both belts
are not the same dimension across the section, then one deck will run at a
different speed to the other. Even a small discrepancy can cause a
significant speed error. As far as picking a size goes, many belt
manufacturers quote the sizes as a diameter when the belt is made into a
nice circle. I have a chart with many concentric circles on it, each marked
with a diameter. The size to pick is the next one down from where the belt
sits on the chart. Most cassette decks don't mind too much if the belt is
slightly tight, and in general, better that than loose, but it doesn't want
to be so tight that you have to really stretch it to get it on, as this can
rapidly cause bearing wear, and stop idler arms from swinging, where these
rely on light belt tension to form their spring return.
Arfa
snip
Thanks. It does look like it's driven by just one motor. What you said
suggests I would have to change both belts at the time time, in order
to keep the cassette decks running at the same speed? If I change both
belts, and it differs a little bit, would that mean I would have to
readjust the speed of the motor? The service manual for the shelf
stereo mentions speed adjustment of the tape deck.
- Eli- Hide quoted text -
- Show quoted text -
Unless the belt actually is slipping, the belt size does not effect
the actual speed.
That seems right to me. If there is no slippage, the speed of the
motor and the size of the two pulleys seem like the only things that
control the speed of the driven wheel. An even more extreme case is
a bicycle chain where there can be plenty of slack on the bottom, but
the top is tight.
But maybe Arfa can explain it to me.
"Michael A. Terrell" <mike.terrell@earthlink.net> wrote in message
news:u_qdnW1dCJEXOs3WnZ2dnUVZ_hti4p2d@earthlink.com...
Chuck wrote:
On Sat, 9 Jan 2010 16:49:39 -0800 (PST), Eli Luong
eliluong@gmail.com> wrote:
Hello - I am trying to repair a broken cassette player (dual-deck, one
of the larger cables that connectors to the motor is broken). I
measured it to be about 20cm or 8in. I found this website for parts:
http://www.studiosoundelectronics.com/cassette.htm
But I'm not sure what to choose exactly. They said to account for
stretch (measured the 20cm w/out stretch), but then they have 1) flat
belts, 2) square belts, 3) square belt small types. From what I can
see on my broken belt, it appears to be square shaped, 1mm in
diameter. Any guidance, please?
Thanks,
- Eli
A word of caution. We discovered years ago that using PRB square
belts would greatly increase the deck's wow and flutter so I would
avoid them. Chuck
PRB has been gone for a long time. They were bought by Russell
Industries.
--
Greed is the root of all eBay.
Yes, but they still have the "PRB Line" and that product looks the same.
Trouble is, there are fewer and fewer choices for replacements these days.
Mark Z.