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Old 18th January 2009, 09:17 PM   #51
chrish is offline chrish  Australia
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Did you fit the solid state diodes to the board? If so, it may be worth checking that they are not destroyed. This is a common problem with the Simple SE. I would suggest removing the solid state diodes and purchase a new 5AR4. My JJ rectifier tube did the same thing, and the solid state diodes were destroyed. For me this was associated with the use of the standby switch. I removed the standby switch and the solid state diodes and replaced the rectifier tube (with a Sovtek 5AR4) and have had completely trouble free operation for over a year.
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Old 18th January 2009, 09:49 PM   #52
DimZ is offline DimZ  Greece
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no solid state diodes, no standby switch

as for the rectifier tube, I am waiting a sovtek on Wensday, and probably order tomorrow 1-2 more, I;ll check ebay first thing in the morning

next time I think I'll take a video of the fireworks (though I hope they dont happen), it was awasome and scary ....
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Old 18th January 2009, 11:30 PM   #53
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If you are in a 230/240 volt country a 1 amp fuse should be sufficient. I use a 2 amp fuse here in 120 volt land. The likely cause for fireworks is the rectifier tube itself. A larger fuse can make life really unhappy for things like transformers.
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Old 19th January 2009, 06:46 AM   #54
DimZ is offline DimZ  Greece
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i am in a 230/240 , I'll buy some 1A fuses, and test the amp again tonight, I'll try to find more rectifier tubes from friends and try them out ...
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Old 19th January 2009, 02:21 PM   #55
DimZ is offline DimZ  Greece
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removed the supl cap, with 1A fuse, no fireworks just sparks at about 15sec after switching - blown fuse

after 30 minutes with 1.8A fuse some sparks about 10 sec and more after 30 sec - blown fuse

tomorow I;ll get a gz34 from a friend and try it .... maybe its just the JJ
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Old 19th January 2009, 03:23 PM   #56
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Quote:
Originally posted by jimazz
removed the supl cap, with 1A fuse, no fireworks just sparks at about 15sec after switching - blown fuse

after 30 minutes with 1.8A fuse some sparks about 10 sec and more after 30 sec - blown fuse

tomorow I;ll get a gz34 from a friend and try it .... maybe its just the JJ
If a new rectifier tube just sparked, it suggests that something else is wrong in the amp circuit. If it's the one that sparked previously, you don't want to use it anymore.
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Old 19th January 2009, 03:49 PM   #57
DimZ is offline DimZ  Greece
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update

I tried 2 more times to power the amp

1st time (1A fuse) sparks after 40-45 sec - blown fuse

2nd time (2.5A fuse) no sparks at all , after 2 minutes I turned on the cd player and played a cd, bad blury sound and lot of disortion ...... put a sacd - the same bad sound, and after 2-3 minutes of bad sound , a spark in the tube along with a pop and blown fuse

no more for tonight, I'll wait to get some more rectifier tubes ...

Evenharmonics - it has been the same rectifier tube , which Iam going to bury in the backyard ---- rip
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Old 19th January 2009, 07:30 PM   #58
DimZ is offline DimZ  Greece
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following a friends advice

1- removed the rectifier tube, powered on - el34 alive - no blown fuse

2- turned it off - put the rectifier back on - fired up - very little spark - no blown fuse - plays quite nice (not like the first time , but the motor run cap is out)

the 3d step was in case of a blown fuse at step 2 to change the rectifier tube - if it blew the fuse again then it wouldnt have been the rectifier but maybe the caps

anyway I didnt have to go to step 3 ....


is been playing like that for 30 minutes now - everything seems to be working ok ....... just not the sound of the first day ....

?????????????
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Old 20th January 2009, 01:47 PM   #59
DimZ is offline DimZ  Greece
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just switched to another rectifier tube (5U4gb) .... no sparks and everything ok


no JJ anymore for me ..................
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