Any idea for further tests to find a problem? Can it be because of some old pots/switch?
I'd check the cables you're using as well. If one of them has a problem with the ground connection then you might find signal appearing in funny places as it tries to close the signal loop.
---Gary
I recapped it So everything should be good there. I guess one thing was that I was having hard time assembling all these tiny rotary switches after I deoxited them. Do you thing you can shorten something in there so you have this "mono" problem while switching functions will be ok?
well , something is obviously wrong
useful and easy procedure these days , while working on gadget, is to make plenty of digi pictures
it can save you later , if nothing else - time saving during assembly ( less thinking needed) can be substantial
dunno ... comparing your pictures with pictures of SL10 from Treshold broshures , it seems all wires on pcbs are in place , and I resume that you didn't desolder any of them
culprit can be either on switches or pots - take a good look for unintentional shorts
useful and easy procedure these days , while working on gadget, is to make plenty of digi pictures
it can save you later , if nothing else - time saving during assembly ( less thinking needed) can be substantial
dunno ... comparing your pictures with pictures of SL10 from Treshold broshures , it seems all wires on pcbs are in place , and I resume that you didn't desolder any of them
culprit can be either on switches or pots - take a good look for unintentional shorts
regarding gain issue - look at attached schm - for 6db gain decrease - either double in value 750R or halve in value 18K2 (both marked red)
B1 vs. SL10 .......
do not underestimate old geezers
B1 is welcome in your system if your sources are capable to drive power amp directly , swing-wise
B1 vs. SL10 .......
do not underestimate old geezers
B1 is welcome in your system if your sources are capable to drive power amp directly , swing-wise
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regarding gain issue - look at attached schm - for 6db gain decrease either double in value 750R or halve in value 18K2 (both marked red)
B1 vs. SL10 .......
do not underestimate old geezers
B1 is welcome in your system if your sources are capable to drive power amp directly , swing-wise
Thanks! Ok, I see for B1 vs sl-10 it is quite predictable, but what about phono stage of SL-10 vs Pearl 2? Have Mr. Pass and others improved it after ~30 years?
regarding gain issue - look at attached schm - for 6db gain decrease - either double in value 750R or halve in value 18K2 (both marked red)
The schematic has a minor error compared to my SL10. The volume pot in my SL10 is 22K, not 10K. But your answer is still fine.
Another way of reducing the gain is to increase the value of the 1K resistor in series with the volume pot. Increasing it to ~12k will decrease gain by about 6db if your unit has a 10K pot. If your unit has a 22K pot then increasing the resistor to ~24K would drop the gain by 6db.
---Gary
So, I've checked resistance between hot R and L and it is zero(within the accuracy of my meter). Hm... From what should I start to find the reason -- desilder all the switches and attenuator and check them?
try the same with the balance a little offset.
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