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Registered Member #3926
Joined: Fri Jun 03 2011, 08:32PM
Location: UK.
Posts: 525
Dr. Pork wrote ...
Platinum wrote ...
Yes, I will buy some zeners, thank you though!
No problem sir :P
BTW, just noticed the link you posted.. the circuit in the picture honestly looks somewhat shitty to me. IMHO if you really paid 30 pounds for it, you were ripped off :)
Marko
I bought it off Tom Williamson, payed £30 altogether, and I had to pay for postal order...
I've also added a zener for the other side of the ZVS.
Registered Member #3943
Joined: Sun Jun 12 2011, 05:24PM
Location: The Shire, UK
Posts: 552
Dr. Pork wrote ...
Platinum wrote ...
Yes, I will buy some zeners, thank you though!
No problem sir :P
BTW, just noticed the link you posted.. the circuit in the picture honestly looks somewhat shitty to me. IMHO if you really paid 30 pounds for it, you were ripped off :)
Marko
Wow, I just saw the picture and some of those components look too weak for ZVS powers.
Get 1N5349B 12v 5W zeners from maplin. I used those zeners on my ZVS and not one has blown.
And unless I am missing something here, I can not see any 470 ohm gate resistors in the picture.
BTW, being in wales, are you close to the English boarder at all? I live about a 30 minute drive away from Welshpool.
Registered Member #3926
Joined: Fri Jun 03 2011, 08:32PM
Location: UK.
Posts: 525
I live in South Wales, Llanelli.
I will go down maplins tomorrow, buy some zenners, and also silver thermal paste for my CPU, as my Phenom X4 unlocked from an Athlon 445 is running at 70oC! at load.
The resistors are underneath the board.
At 65w 19v and like 3a (multimeter shows 26v! not 19volts) and arc ignites at 10~mm and stretches to about 27mm's.
I really need to get a better PSU, as if I add more capacitors, the PSU shuts off, lol, after all it is a laptop battery charger.
Registered Member #3943
Joined: Sun Jun 12 2011, 05:24PM
Location: The Shire, UK
Posts: 552
Platinum wrote ...
I live in South Wales, Llanelli.
I will go down maplins tomorrow, buy some zenners, and also silver thermal paste for my CPU, as my Phenom X4 unlocked from an Athlon 445 is running at 70oC! at load.
The resistors are underneath the board.
At 65w 19v and like 3a (multimeter shows 26v! not 19volts) and arc ignites at 10~mm and stretches to about 27mm's.
I really need to get a better PSU, as if I add more capacitors, the PSU shuts off, lol, after all it is a laptop battery charger.
Ah ok. It would just be cool if there was a fellow 4hv member near me lol.
I have been close to there before though, I go down to Pembrokeshire quite often during summer with family. And Oakwood themepark down there is awesome too!
Registered Member #89
Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
..Perhaps this will save some of your money - I've tested the expensive silver thermal paste against the cheap white one, while doing some DC load tests - found no differences that were comparable to even small variations in the amount of grease or pressure over the device. I bet just applying the grease more properly (hint-preheat the heatsink on a stove to some 50C so the grease thins in contact with it) would help your CPU at least measurably.
OT, what about driving the ignition coil by discharging some caps (charged to mains voltage) into it? :P
Registered Member #3943
Joined: Sun Jun 12 2011, 05:24PM
Location: The Shire, UK
Posts: 552
Dr. Pork wrote ...
..Perhaps this will save some of your money - I've tested the expensive silver thermal paste against the cheap white one, while doing some DC load tests - found no differences that were comparable to even small variations in the amount of grease or pressure over the device. I bet just applying the grease more properly (hint-preheat the heatsink on a stove to some 50C so the grease thins in contact with it) would help your CPU at least measurably.
OT, what about driving the ignition coil by discharging some caps (charged to mains voltage) into it? :P
Marko
A question about thermal paste, should it be applied on both sides of the insulator pad (this is for MOSFET's)? or just on one? I can never find a straight answer.
Registered Member #89
Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
A question about thermal paste, should it be applied on both sides of the insulator pad (this is for MOSFET's)? or just on one? I can never find a straight answer.
Well, sil-pads are gooey enough that it doesn't really seem to be much of an improvement to use thermal paste with them. I never did any tests with those though, just bare metal-on-metal contact. If you opt to still apply paste, there's no reason why not do it on both sides.
If mica or ceramic pads are used, then heatsinking paste must be applied, on both sides.
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I've now ACTUALLY got an ignition coil.
