Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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Old January 15th 16, 05:40 PM posted to sci.electronics.repair
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Default TIP: long stem, blind, snap rivet reuse.

For holding, through grommets, reverb tank to steel chassis, so not the
usual small ones for DSP boards etc. You cannot reinsert, blind, as the
4 splay bits are permanently splayed out.
Find a metal plate with holes the size to push each rivet in, to close
back the 4 splays, then old soldering iron and hotmelt glue the 4 together.
Reinsert through grommets and chassis, then the closer rivet, with more
force than usual to break the hotmelt .

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Old January 16th 16, 09:03 PM posted to sci.electronics.repair
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"N_Cook" wrote in message ...

For holding, through grommets, reverb tank to steel chassis, so not the
usual small ones for DSP boards etc. You cannot reinsert, blind, as the
4 splay bits are permanently splayed out.
Find a metal plate with holes the size to push each rivet in, to close
back the 4 splays, then old soldering iron and hotmelt glue the 4 together.
Reinsert through grommets and chassis, then the closer rivet, with more
force than usual to break the hotmelt .




Hmmm, I've read that several times now and am none the wiser.

I have a picture of a reverb tank with rivets through grommets on a steel
chassis, but then it goes all wibbly wobbly.


I would be inclined to use 4 x 3mm or 4mm bolts and locknuts.





Gareth.

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Old January 16th 16, 11:08 PM posted to sci.electronics.repair
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Default TIP: long stem, blind, snap rivet reuse.

On 2016-01-16, Gareth Magennis wrote:


"N_Cook" wrote in message ...

For holding, through grommets, reverb tank to steel chassis, so not the
usual small ones for DSP boards etc. You cannot reinsert, blind, as the
4 splay bits are permanently splayed out.
Find a metal plate with holes the size to push each rivet in, to close
back the 4 splays, then old soldering iron and hotmelt glue the 4 together.
Reinsert through grommets and chassis, then the closer rivet, with more
force than usual to break the hotmelt .




Hmmm, I've read that several times now and am none the wiser.


He seems to have found a way to re-use splay rivets by squeezing
together their splayed ends with a simple jig (metal with holes), and
temporarily hot-gluing them together. The rivets can then
be re-used. Applying the rivet fastener with "more force than usual"
completes the job by breaking off the hot glue.
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Old January 17th 16, 12:53 AM posted to sci.electronics.repair
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Default long stem, blind, snap rivet reuse.



"Kaz Kylheku" wrote in message ...

On 2016-01-16, Gareth Magennis wrote:


"N_Cook" wrote in message ...

For holding, through grommets, reverb tank to steel chassis, so not the
usual small ones for DSP boards etc. You cannot reinsert, blind, as the
4 splay bits are permanently splayed out.
Find a metal plate with holes the size to push each rivet in, to close
back the 4 splays, then old soldering iron and hotmelt glue the 4
together.
Reinsert through grommets and chassis, then the closer rivet, with more
force than usual to break the hotmelt .




Hmmm, I've read that several times now and am none the wiser.


He seems to have found a way to re-use splay rivets by squeezing
together their splayed ends with a simple jig (metal with holes), and
temporarily hot-gluing them together. The rivets can then
be re-used. Applying the rivet fastener with "more force than usual"
completes the job by breaking off the hot glue.






Yeah, right, funny how you snipped all my context to suit your own agenda.

Prick.




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Old January 17th 16, 09:31 AM posted to sci.electronics.repair
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Default TIP: long stem, blind, snap rivet reuse.

On 16/01/2016 21:03, Gareth Magennis wrote:


"N_Cook" wrote in message ...

For holding, through grommets, reverb tank to steel chassis, so not the
usual small ones for DSP boards etc. You cannot reinsert, blind, as the
4 splay bits are permanently splayed out.
Find a metal plate with holes the size to push each rivet in, to close
back the 4 splays, then old soldering iron and hotmelt glue the 4 together.
Reinsert through grommets and chassis, then the closer rivet, with more
force than usual to break the hotmelt .




Hmmm, I've read that several times now and am none the wiser.

I have a picture of a reverb tank with rivets through grommets on a
steel chassis, but then it goes all wibbly wobbly.


I would be inclined to use 4 x 3mm or 4mm bolts and locknuts.





Gareth.


I've yet to come across blind bolts, other than for masonry use.
ie one sided application , or you have to take the amp apart to fix the
tank, using ordinary nuts and bolts
for a Marshall Valvestate 100V.
Incidently attrocious main board holding, vaguely held nylon standoffs
that allow everything to flap about. Now there one substantial bolt and
nut and spacer went in there to hold heatsink, loads of 7W resistors,
big caps etc, from bouncing around so much


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Old January 17th 16, 01:01 PM posted to sci.electronics.repair
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Default TIP: long stem, blind, snap rivet reuse.

On 16/01/16 21:03, Gareth Magennis wrote:


"N_Cook" wrote in message ...

For holding, through grommets, reverb tank to steel chassis, so not the
usual small ones for DSP boards etc. You cannot reinsert, blind, as the
4 splay bits are permanently splayed out.
Find a metal plate with holes the size to push each rivet in, to close
back the 4 splays, then old soldering iron and hotmelt glue the 4 together.
Reinsert through grommets and chassis, then the closer rivet, with more
force than usual to break the hotmelt .




Hmmm, I've read that several times now and am none the wiser.

I have a picture of a reverb tank with rivets through grommets on a
steel chassis, but then it goes all wibbly wobbly.


I would be inclined to use 4 x 3mm or 4mm bolts and locknuts.



I'm assuming they are these

http://www.sdproducts.co.uk/push-rivets-removable

Disadvantage in method is ye get a glob of glue rattling around in the
bottom of the case :-p

--
Adrian C
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Old January 17th 16, 01:02 PM posted to sci.electronics.repair
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Default TIP: long stem, blind, snap rivet reuse.

Incidently I find about 20 percent of the tank failures I come across is
failure of the connections to the outside world corrossion or insulated
wires breaking or solder failure at the flexing point ,70percent are
failure of the 200R coil at the fine wire soldered terminals and only
10% of the time the 200R coil has a break inside somewhere.
So just because they lead out the coil wires too tight to the terminals,
so easily sorted out without taking the spring anchors and iron
pole-piece segments apart.

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Old January 17th 16, 02:47 PM posted to sci.electronics.repair
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Default TIP: long stem, blind, snap rivet reuse.

On 17/01/2016 13:01, Adrian Caspersz wrote:
On 16/01/16 21:03, Gareth Magennis wrote:


"N_Cook" wrote in message ...

For holding, through grommets, reverb tank to steel chassis, so not the
usual small ones for DSP boards etc. You cannot reinsert, blind, as the
4 splay bits are permanently splayed out.
Find a metal plate with holes the size to push each rivet in, to close
back the 4 splays, then old soldering iron and hotmelt glue the 4
together.
Reinsert through grommets and chassis, then the closer rivet, with more
force than usual to break the hotmelt .




Hmmm, I've read that several times now and am none the wiser.

I have a picture of a reverb tank with rivets through grommets on a
steel chassis, but then it goes all wibbly wobbly.


I would be inclined to use 4 x 3mm or 4mm bolts and locknuts.



I'm assuming they are these

http://www.sdproducts.co.uk/push-rivets-removable

Disadvantage in method is ye get a glob of glue rattling around in the
bottom of the case :-p


Those are the bulk standard ones, these are 3/8 inch longer in the stem.
The chassis is open on the other side so easy to collect them , assuming
they pop off the end of the rivets, otherwise you have to remove the
main pcb to get to the blind side of where the tank is fixed.


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