Hi Salas.
What do you think about using this cap for C2?
http://uk.farnell.com/panasonic/ezpe80106lta/cap-film-pp-10uf-800v-rad/dp/2192337
What do you think about using this cap for C2?
http://uk.farnell.com/panasonic/ezpe80106lta/cap-film-pp-10uf-800v-rad/dp/2192337
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I am not impressed by its ~0.8 1kHz tanδ(%) @ 10uF. Wima MKP10 has <3x10^-4 ( 0.0003 ).
Well... Where did you get the numbers?
Here:
http://www.farnell.com/datasheets/1644446.pdf
EZPE80106LTA has tanδ(%) 0.22 @1kHz. In absolute numbers it is 0.0022.
Here:
http://www.wima.com/EN/WIMA_MKP_10.pdf
for MKP10 series and C>1uF: tanδ (already in absolute numbers) is 0.0003.
From this chart in its datasheet. 0.08 (not 0.8, typo).
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Hi guys,
I built the HV pcb Kit from you. It sounds amazing, however mine only ran for a short while.
I am running it at 300V output and 50mA.
It seems that my heatsink was not up to the job and I overheated the transistor - I measured 75-80 Deg on the sink a few minutes before it went silent.
I only get 85V output now, so that's gone.
Ordered a replacement transistor and a large heatsink. However, do you suspect other parts might have gone in this except the transistor? I would like to order all the replacements so I can get it all done at once.
What is the temperature the heatsink should stabilise at?
Thank you and congrats on the design and kit.
Andrei
I built the HV pcb Kit from you. It sounds amazing, however mine only ran for a short while.
I am running it at 300V output and 50mA.
It seems that my heatsink was not up to the job and I overheated the transistor - I measured 75-80 Deg on the sink a few minutes before it went silent.
I only get 85V output now, so that's gone.
Ordered a replacement transistor and a large heatsink. However, do you suspect other parts might have gone in this except the transistor? I would like to order all the replacements so I can get it all done at once.
What is the temperature the heatsink should stabilise at?
Thank you and congrats on the design and kit.
Andrei
There is a big chance that some other semis went south. The fastest method I use now is to take them all off and measure them, even if it doesn' t seem it is.
You are going to waist more time if you just change one and then it doesn' t work again. There is also a chance that you burn some more on the process, so I say take all of them off.
Also make sure that you have enough heatsinking. Remember that sinks inside cases are not so effective.
You are going to waist more time if you just change one and then it doesn' t work again. There is also a chance that you burn some more on the process, so I say take all of them off.
Also make sure that you have enough heatsinking. Remember that sinks inside cases are not so effective.
You will need a desoldering pump, solder wick and if you google a little bit :
https://www.google.gr/search?q=deso...l5.4064j0j7&sourceid=chrome&es_sm=93&ie=UTF-8
https://www.google.gr/search?q=deso...l5.4064j0j7&sourceid=chrome&es_sm=93&ie=UTF-8