just got my first anode cup shock (one *ZAP* sound doesn't mean fully discharged!)

ElectricDreamz

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just got my first anode cup shock (one *ZAP* sound doesn't mean fully discharged!)

SOOOOOOO like everyone says 10000000x over, make sure whatever you're using to discharge a monitor (and you) is grounded.

having pulled anode cups several times this year, i admittedly got cheeky today and didn't bother playing it safe.

i heard a tiny *zap* and thought that that was the full CRT discharge. i thought "lol big deal, i'll be fine, everyone's making this a big deal for no good reason"

NOPE.

got another *ZAP* that was MUCH louder and (painfully and physically) experienced that's still got my hand tingling and scared the shit out of me

FWIW, don't be an idiot and don't think that the one zap you heard first means that the CRT is fully discharged
 
if you tried discharging it immediately after you turned it off, chances are that's why you got dinged. the tube itself is like a giant capacitor. the residual charge on the back of the tube will actually collect back into the anode hole. I picked up that tip years ago on here and it altered how I discharge tubes. :D

if you can master maneuvering the anode cup while only grabbing the rubber, you can avoid this problem.

most all Wells-Gardner monitors from the K7000 onwards will discharge themselves. notable exceptions are the one aftermarket flyback with the phillips screwdriver adjustment knobs, that apparently has no dampener built in. (discovered this at Arcadecup last year). I also believe Neotecs discharge themselves too.

all the older 19" monitors, and all Hantarex models (9000, Polo) require multiple discharges.
 
Sanyo 20EZ :)

i was aware of the zap, but in my many browsings on the internet talking about it, i don't recall ever seeing anything about how one zap isn't always enough to get it discharged

yay for learning (i think ...)

all the older 19" monitors, and all Hantarex models (9000, Polo) require multiple discharges.
 
yeah. I took a full zap on a Polo once, brain fart moment where I thought it was just like a K7000. whoops. :)

you'll see the blue lightning when you pop the anode off about 3 times though.
 
I remember back in the eighties I got zapped by the same monitor 3 times in a row. Even after discharging and checking it with a HV probe that had a meter. It was a damn Electrohome X-Y GO8 in a Sega Star Trek.

Didn't work on it for a week after that.
 
I always discharge, then stick the screwdriver under the cap and go do something else for a minute before touching anything. Haven't been significantly zapped by the anode cap, but did have a k7000 that I discharged 4 times and still got a little shock when pulling the cap.
 
Welcome to the "I can't believe I actually did that" club.

JD
 
your almost in the alpha club, you need some more initiation.

try discharging the anode wile the monitor is still running.

or setting a G07 on your bare leg with the blown small fuse and a charged filter cap.


you'll get that jacket if you keep it up:):)

Peace
Buffett
 
your almost in the alpha club, you need some more initiation.

try discharging the anode wile the monitor is still running.

or setting a G07 on your bare leg with the blown small fuse and a charged filter cap.


you'll get that jacket if you keep it up:):)

Peace
Buffett



Ohhhh, did the G07 one already......have the scar and the t-shirt! [emoji13]
 
While showing how to use a high voltage probe, I showed someone that you need to double check.

Discharged twice. Took the anode cup off. Showed the person see there is no more high voltage coming from the flyback.

I showed him that a tube can still have voltage even after the anode has been removed and discharged twice.
 
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