Mark Fortune wrote:
I have a CRT monitor that has a dodgy Vertical deflection coil - the
thin copper wire seems loose in places and far too often I can hear it
oscillating - it's a very high pitch annoying noise and i'd like to fix
it. My first thought is to smear some sort of adhesive or epoxy around
the coil to hold it in place, but im conscerned weather this might have
adverse effects which I may not be aware about.
Any crt experts out there have any recommendations on what kind of gluey
substance can be used? or perhaps there is a better method of dealing
with this sort of thing (which doesnt involve the skip)

thanks in advance,
Mark
Use Silicone sealant !

the Vertical Coil runs around 30 to 120 Cycles /second barely audible
the Horizontal Coil runs around 15000 cycles/ second .

The Squeal is usually generated by a mechanical problem with the Flyback
Transformer.

Yukio YANO

Yukio YANO wrote:
Mark Fortune wrote:
I have a CRT monitor that has a dodgy Vertical deflection coil - the
thin copper wire seems loose in places and far too often I can hear it
oscillating - it's a very high pitch annoying noise and i'd like to fix
it. My first thought is to smear some sort of adhesive or epoxy around
the coil to hold it in place, but im conscerned weather this might have
adverse effects which I may not be aware about.
Any crt experts out there have any recommendations on what kind of gluey
substance can be used? or perhaps there is a better method of dealing
with this sort of thing (which doesnt involve the skip)

thanks in advance,
Mark
Use Silicone sealant !

the Vertical Coil runs around 30 to 120 Cycles /second barely audible
the Horizontal Coil runs around 15000 cycles/ second .

The Squeal is usually generated by a mechanical problem with the Flyback
Transformer.

Yukio YANO

BEWARE that some silicones are conductive until fully cured ! That
'vinegar' smell is acid which is the conductor. Great stuff if given
the time to cure.

GG

Mark Fortune wrote:

I have a CRT monitor that has a dodgy Vertical deflection coil - the
thin copper wire seems loose in places and far too often I can hear it
oscillating - it's a very high pitch annoying noise and i'd like to fix
it. My first thought is to smear some sort of adhesive or epoxy around
the coil to hold it in place, but im conscerned weather this might have
adverse effects which I may not be aware about.
Any crt experts out there have any recommendations on what kind of gluey
substance can be used? or perhaps there is a better method of dealing
with this sort of thing (which doesnt involve the skip)

thanks in advance,
Mark


news:sci.electronics.repair is the newsgroup you want.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

I have a CRT monitor that has a dodgy Vertical deflection coil - the
thin copper wire seems loose in places and far too often I can hear it
oscillating - it's a very high pitch annoying noise and i'd like to fix
it. My first thought is to smear some sort of adhesive or epoxy around
the coil to hold it in place, but im conscerned weather this might have
adverse effects which I may not be aware about.
Any crt experts out there have any recommendations on what kind of gluey
substance can be used? or perhaps there is a better method of dealing
with this sort of thing (which doesnt involve the skip)

thanks in advance,
Mark

wrote:


Use Silicone sealant !

I think I have some of that hermetite stuff I used to use on the car
gaskets. red or blue?


the Vertical Coil runs around 30 to 120 Cycles /second barely audible
the Horizontal Coil runs around 15000 cycles/ second .


Ah, it might be the H coil then, im not sure. what I know is the coil is
loose and im fairly certain its the source of the noise. Reason being I
tightened it a little the other day by pulling it tightish and
re-soldering one of the ends, that seems to have quietenned it somewhat
but I didnt pull it too tight through fear of snapping the cable.
Perhaps I could try unsoldering one end and partially re-winding it over
the weekend. This also seems to have reduced, but not eliminated, the
other problem I was having of flyback lines appearing across the top of
the screen. According to other posts im told this may be a capacitor at
fault which I intend to replace but i've found what I believe is the
timing capacitor and it's something I need to go shopping for as I dont
have one in stock.
All this for one little kitten puking in the monitor about two years ago
:\ (problem's been around since then). Had fun scraping dried vom off
the circuit board.

The Squeal is usually generated by a mechanical problem with the Flyback
Transformer.

Yukio YANO


BEWARE that some silicones are conductive until fully cured ! That
'vinegar' smell is acid which is the conductor. Great stuff if given
the time to cure.

hmm, vinegar.


GG


thanks for the advice

On 2006-07-14, Mark Fortune wrote:
wrote:


Use Silicone sealant !

I think I have some of that hermetite stuff I used to use on the car
gaskets. red or blue?

blu is IIRC neutral cure (if the same as the blue permatex stuff)

BEWARE that some silicones are conductive until fully cured ! That
'vinegar' smell is acid which is the conductor. Great stuff if given
the time to cure.

hmm, vinegar.


so use blue.

Bye.
Jasen