Digest for sci.electronics.repair@googlegroups.com - 11 updates in 2 topics

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Michael Black <et472@ncf.ca>: Sep 28 08:26PM -0400


> Hopefully someone knows what's going on. I don't have a ton of tapes,
> but would like to transfer my few remaining home videos before retiring
> the format forever. Thanks.
 
There's a faq about VCRs at http:www.repairfaq.org that even includes
some photos of how the tape is supposed to wind. At least read that first
before asking a vague question.
 
Michael
Ian Malcolm <See.My.Sig.for.email@totally.invalid>: Sep 29 01:01AM

Michael Black <et472@ncf.ca> wrote in
> some photos of how the tape is supposed to wind. At least read that
> first before asking a vague question.
 
> Michael
 
If ive read the model number off your youtube video correctly, its a
Toshiba DVR-610. There appears to be a service manual online at:
<http://www.manualowl.com/m/Toshiba/DVR610/Manual/274957>
but it doesnt cover the details of the VCR mechaninsm.
 
95% odds its got deteriorated rubber parts, probably a drive belt or
idler tyre, or maybe a friction clutch has gone bad. Its supposed to
drive the takeup reel during the early stages of unloading to wind the
loop of tape back into the cassette.
 
Basically it needs servicing. If you had the skills to do this, you
wouldn't be asking here what's wrong with it and most of the combo units
even from leading brand manufacturers were pretty cruddy to start with so
it is probably not cost effective to have it serviced, even if parts are
still obtainable.
 
--
Ian Malcolm. London, ENGLAND. (NEWSGROUP REPLY PREFERRED)
ianm[at]the[dash]malcolms[dot]freeserve[dot]co[dot]uk
[at]=@, [dash]=- & [dot]=. *Warning* HTML & >32K emails --> NUL
N_Cook <diverse@tcp.co.uk>: Sep 29 12:13PM +0100

> Hello. I purchased this combo player/dvd recorder a few years back. Only played about 10 vhs tapes with it, as I transferred old stuff to dvd. Then it began to do what it does in this video: it will accept the tape, seat the tape, then eject it and create a situation where there's a string of tape not wound back into the cassette:
 
> http://youtu.be/s2e9OQBMAy8
 
> Hopefully someone knows what's going on. I don't have a ton of tapes, but would like to transfer my few remaining home videos before retiring the format forever. Thanks.
 
most likely perished rubber pulley tyre or drive band, or failed slip
clutch or less likely something jammed under jockey-wheel swing arm
chuck <chuck@deja.net>: Sep 29 09:11AM -0500

On Sun, 28 Sep 2014 17:12:25 -0700 (PDT), jeffreyscottarnold@lycos.com
wrote:
 
>Hello. I purchased this combo player/dvd recorder a few years back. Only played about 10 vhs tapes with it, as I transferred old stuff to dvd. Then it began to do what it does in this video: it will accept the tape, seat the tape, then eject it and create a situation where there's a string of tape not wound back into the cassette:
 
>http://youtu.be/s2e9OQBMAy8
 
>Hopefully someone knows what's going on. I don't have a ton of tapes, but would like to transfer my few remaining home videos before retiring the format forever. Thanks.
 
 
This unit has the worst vcr mechanism I have ever seen. The gear
drive that turns the take up hub and the braking system are so poorly
designed that it is amazing that they work at all. My suggestion is
to find an older vcr to play the tapes and run video and audio cables
to a DVD recorder.
"Danny D." <dannydiamico@gmail.com>: Sep 28 04:50PM

OFWW wrote, on Sat, 27 Sep 2014 23:55:45 -0700:
 
> If you installed these without lock washers I would recommend you go
> back up and at least put nylock nuts as safety nuts. Heating and
> cooling will cause those nuts to walk off the u-bolts.
 
Thank you for that safety suggestion!
That is a good point. Safety is paramount.
 
This treehouse 50 feet in the air in the redwoods has to outlast us
and it has be safe at all times.
 
Since we didn't use lock washers on the steel clamps, I will advise
my neighbor and I will snap a picture of the results for you.
 
You will notice that we doubled up the two ends of the steel cable
as they wrapped around the tree, so that we'd always have two cables
supporting the bridge.
 
On the big tree, 125 feet away, we will add a wraparound additional
steel cable, so that the middle also has two cables.
 
Any other safety ideas are welcome, as we're just at the point now
where we can start hanging the suspension bridge from the two steel
catenaries.
 
For example, you will notice that we followed the rule as shown here:
http://www.pirate4x4.com/tech/billavista/Recovery/dead%20end.jpg
 
Following that diagram, we put the "saddle" of the clamps on the
"live end" (the mnemonic we used was "don't saddle a dead horse").
http://www.pirate4x4.com/tech/billavista/Recovery/use%20of%20wire%20rope%20clips.jpg
 
Any other tips are welcome, as we're just now at the stage where
we have the ability to build the 125 foot long bridge starting
about 15 feet up in a pine, and then going straight across a
steep slope through the set of two redwoods, and then on to the
really big redwood 125 feet down the slope.
 
The treehouse will be in the middle of the bridge.
Oren <Oren@127.0.0.1>: Sep 28 10:31AM -0700

On Sun, 28 Sep 2014 16:50:02 +0000 (UTC), "Danny D."
 
>Following that diagram, we put the "saddle" of the clamps on the
>"live end" (the mnemonic we used was "don't saddle a dead horse").
> http://www.pirate4x4.com/tech/billavista/Recovery/use%20of%20wire%20rope%20clips.jpg
 
Just curious. Is there a torque spec for those clamps? Or ...
Dan Coby <adcoby@earthlink.net>: Sep 28 12:34PM -0700

On 9/28/2014 9:50 AM, Danny D. wrote:
... snip
 
 
> On the big tree, 125 feet away, we will add a wraparound additional
> steel cable, so that the middle also has two cables.
 
... snip
 
> steep slope through the set of two redwoods, and then on to the
> really big redwood 125 feet down the slope.
 
> The treehouse will be in the middle of the bridge.
 
Are you saying that the tree house will be in the middle of a 125 foot
suspension bridge. How much will the tree house weigh when fully loaded
and do you have any idea of the forces that may be in the cables?
 
 
Dan
"Danny D." <dannydiamico@gmail.com>: Sep 28 09:11PM

dpb wrote, on Sun, 28 Sep 2014 13:54:02 -0500:
 
> I still think the clips should be used as delivered by the manufacturer
 
They *are* designed for this purpose, are they not?
 
They didn't come with lock washers.
 
I'm sure we have nothing against putting them on; but, if they really
needed lock washers, wouldn't they have come with them?
"Mike Marlow" <mmarlowREMOVE@windstream.net>: Sep 28 05:32PM -0400

Danny D. wrote:
 
> They didn't come with lock washers.
 
> I'm sure we have nothing against putting them on; but, if they really
> needed lock washers, wouldn't they have come with them?
 
Yes.
 
--
 
-Mike-
mmarlowREMOVE@windstream.net
Dan Coby <adcoby@earthlink.net>: Sep 28 08:32PM -0700

On 9/28/2014 2:18 PM, Danny D. wrote:
> (with two little redwoods, side by side, in between).
 
> The steel cables can handle 14,000 pounds each.
 
> That's 28,000 pounds (because we maintain a double cable throughout).
 
You also have to consider the geometry of what you are creating. If you
are tensioning the cables for very little sag then the forces in the
cable can be many time the weight of the tree house. Without knowing
exactly what you are creating then I cannot guess. That is why I asked
if you had any ideas of the forces in the cable.
 
 
> We don't know how much the bridge & treehouse will weigh, but if it's
> close to or greater than 28,000 pounds, then we have a problem.
 
> How much do you think a treehouse will weigh?
 
I do not know what you are planning upon building. That was why I asked
you. If you are talking about the tree houses that we built as kids with
a plywood floor and a few boards and a tar paper roof then only a
couple of hundred pounds. If you are talking about some of the multi
story creations that I have seen on TV then many tons.
 
 
Dan
"Danny D." <dannydiamico@gmail.com>: Sep 29 05:24AM

Dan Coby wrote, on Sun, 28 Sep 2014 20:32:48 -0700:
 
> If you are tensioning the cables for very little sag
> then the forces in the cable can be many time the weight
> of the tree house.
 
We "tensioned" the cables, by hand.
 
What we literally did was put a broomstick through the 60 pound wooden
spool of 250 feet of 3/8" steel cable and we mounted that on two chairs
about 15 feet downhill of a big pine tree.
 
Then we went uphill to that pine tree at a point about 15 feet off the
ground and then back to the chairs with the spool of wire.
 
At that point, we tied a rope to the end of the wire, and we walked the
wire downhill a little less than about 100 feet to a big redwood.
 
At that redwood, we climbed up to the same height as the pine (which,
since it's downhill, is about 40 or so feet up in the air) and we pulled
the rope with the wire cable attached.
 
Then we pulled the rope which pulled the cable back up the hill back to
the point on the path 15 feet below the pine, where we pulled it tight by
hand, and then clamped the 8 clamps on.
 
Then, we simply slid the cable around the big redwood and slid it around
the pine, until the cable clamps were symmetric around the pine, as shown
in the last set of pictures.
 
I won't mention the fact that we accidentally crossed the cables because
we went around the big redwood the wrong way, as that's embarrassing to
mention. Nor will I mention how many times we got hung up in the branches
between trees, necessitating mid-air precarious surgery on the trees.
 
Given all that, I wouldn't call the tension all that tight. You can see
the sag in the photos. Maybe it sags, oh, I don't know, about 5 to 10
feet maybe?
 
> a plywood floor and a few boards and a tar paper roof then only a couple
> of hundred pounds. If you are talking about some of the multi story
> creations that I have seen on TV then many tons.
 
I think we're talking just a plywood box, with a deck. I should mention
that there will be anchors on the two little redwoods, so, the treehouse
won't actually be floating on all sides. The bridge *will* be floating
though. It should be fun once it's done and wired for Internet. It has a
great view once you're up in the redwoods.
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