Some of them are more than a typical DMM can measure!Do you know what the voltages are suppose to be????
In any case, the supply source resistance is so high, even a high input impedance DMM will load it and give innacurate reading.
Some of them are more than a typical DMM can measure!Do you know what the voltages are suppose to be????
All ABS plastics are delicate!Sorry, it doesn't warn about plastics, it warns about using it on rubbers and delicate plastics.
I go by the rule "If it ain't broke don't fix it".Too late..
I just came back from buying the cleaner and I already used it on all pots. One of them gave me problems afterwards, but then it went back to normal.
I read the warning after buying it, which says it should be tested before use on some plastics. I was a bit worried about the small pots (like the one I needed to clean) as they are completely covered in plastic; but I don't think they were damaged.
So, you would recommend not to use it on any pot unless there's a good reason for it?I go by the rule "If it ain't broke don't fix it".
Glad I asked... I was about to put on every pot that passed through my hands.Spraying switch and control cleaner is not preventative maintenance.
Use it once and you will have to use it again.
I only use it when I have to, short of replacing the control.
Again it depends on the type. Some of the old cleaners had "conductive lube" in them that actually made the old pots turn smoother as well as cure the scratchies. Funny, I just had to use it on the pots on the amp I built for my TV speakers yesterday. Worked great, it was stuff I got at Fry's in a green can.Spraying switch and control cleaner is not preventative maintenance.
Use it once and you will have to use it again.
I only use it when I have to, short of replacing the control.
Switch cleaner invariably contains lubricant - which catches *ANY* dust that would otherwise waft right past!Spraying switch and control cleaner is not preventative maintenance.
Use it once and you will have to use it again.
I only use it when I have to, short of replacing the control.
The ozone layer crisis and ensuing anti-CFC legislation has been a major game changer - I've heard reports of CFC free freezer spray causing massive static buildup on boards/components sprayed with it, as yet I've not heard any specific reports of unexpected behaviour with CFC free switch cleaner - attacking ABS plastics probably wasn't that much of a surprise!Again it depends on the type. Some of the old cleaners had "conductive lube" in them that actually made the old pots turn smoother as well as cure the scratchies. Funny, I just had to use it on the pots on the amp I built for my TV speakers yesterday. Worked great, it was stuff I got at Fry's in a green can.
For what the label said I assumed I had to be specially careful with rubbers and soft plastics. But if it does damage ABS, then it would be a bit difficult to tell beforehand; as those are hard plastics.I think some cleaner sprays are plastic safe, but obviously be careful.
But looking on the bright side - it doesn't take much time.For what the label said I assumed I had to be specially careful with rubbers and soft plastics. But if it does damage ABS, then it would be a bit difficult to tell beforehand; as those are hard plastics.
Seems that everything is made of ABS these days!That's definitely going to help a lot.
Let's hope at least the switch cleaner manufacturers considered the plastics used in pots, or the pots manufacturers considered the switch cleaners when choosing the plastics. Because it doesn't make any sense selling a product that's going to dissolve the component that you are attempting to clean.
Yeah, I remember when they forced us to change to "CFC free" flux stripper which absolutely did not work.The ozone layer crisis and ensuing anti-CFC legislation has been a major game changer - I've heard reports of CFC free freezer spray causing massive static buildup on boards/components sprayed with it, as yet I've not heard any specific reports of unexpected behaviour with CFC free switch cleaner - attacking ABS plastics probably wasn't that much of a surprise!
For flux cleaning, I just nip in the car accessory distributors and pick up a gallon of cellulose thinners.Yeah, I remember when they forced us to change to "CFC free" flux stripper which absolutely did not work.
Here is wisdom: non chlorinated brake cleaner spray is GREAT flux stripper and costs $2 for a can. It will also clean switches. But, most cleaners have acetone, xylene and some other "hot" solvents which attack some types of plastic.
It surprises me there are any electronic components using that type of plastic as they often get "stripped" during the manufacturing flow.
Good chance of breaking the neck off if you tap too hard! - and you don't want debris falling on the shadowmask and making extra shadows.older crt's sometimes have flakes coming off the heaters, this causes a grid to cathode short that can do that. sometimes a good tapping with the face of the crt down can get the flakes to move out of the electron gun.
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