Hello folks!
I have recapped an Audio Sonic ST-500 integrated (all the 35 electrolytics, 6 ceramic caps, the 4 rectifiers, and two VD1212-like diodes with 2x 1N4448 in series).
[IMGDEAD]http://img849.imageshack.us/img849/1435/as5002.jpg[/IMGDEAD]
And the board during recapping:
[IMGDEAD]http://img560.imageshack.us/img560/8305/boardas500.jpg[/IMGDEAD]
The sound is amazing!!! I was wondering if it's a little Kenwood or Pioneer based amp as back panel has "Japan" printing, but internet sources says it's a Dutch brand from the Seventies (1975) and seems that it still operates today somehow.
Another source says it's from Glendale, California...
However, after the recap I still have (only on RIGHT channel) an annoying and PERMANENT noisy sound like a "hissssss" or "sssssssh" even when the volume pot is totally attenuated. When I'm listening to music in normal volume levels I can't hear the noise anymore because it's now overcome by the music sound. But in silent passages of the music or during radio interviews and news it is quite annoying.
I was thinking it could be a TR or a Zener diode or a high power resistor?
I'd need to know if the highlighted diodes below are Zener ones and if I can replace the with few I have in stock, rated 1,3W - 40V...
[IMGDEAD]http://img9.imageshack.us/img9/7746/p3210123gh.jpg[/IMGDEAD]
Or if you folks know or have an idea about this problem...
Thanks in advance!!
I have recapped an Audio Sonic ST-500 integrated (all the 35 electrolytics, 6 ceramic caps, the 4 rectifiers, and two VD1212-like diodes with 2x 1N4448 in series).
[IMGDEAD]http://img849.imageshack.us/img849/1435/as5002.jpg[/IMGDEAD]
And the board during recapping:
[IMGDEAD]http://img560.imageshack.us/img560/8305/boardas500.jpg[/IMGDEAD]
The sound is amazing!!! I was wondering if it's a little Kenwood or Pioneer based amp as back panel has "Japan" printing, but internet sources says it's a Dutch brand from the Seventies (1975) and seems that it still operates today somehow.
Another source says it's from Glendale, California...
However, after the recap I still have (only on RIGHT channel) an annoying and PERMANENT noisy sound like a "hissssss" or "sssssssh" even when the volume pot is totally attenuated. When I'm listening to music in normal volume levels I can't hear the noise anymore because it's now overcome by the music sound. But in silent passages of the music or during radio interviews and news it is quite annoying.
I was thinking it could be a TR or a Zener diode or a high power resistor?
I'd need to know if the highlighted diodes below are Zener ones and if I can replace the with few I have in stock, rated 1,3W - 40V...
[IMGDEAD]http://img9.imageshack.us/img9/7746/p3210123gh.jpg[/IMGDEAD]
Or if you folks know or have an idea about this problem...

Thanks in advance!!
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