Is it ok that even if I plug only one input R or L you still have a sound from both channel on output? Does the ore go to mono mode if only there is only one input? Thanks!
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Thanks! But when I plug two channels and use balance signal goes from one channel to another. Any idea for further tests to find a problem? Can it be because of some old pots/switch?
everything looks OK , but it's hard to say from so grainy pictures ;
it's obviously recapped sometimes in the past ( Silmics aren't original caps , for sure )
probably mistake was made during re-assembling wires back to switches-connectors
try harder with pictures
it's obviously recapped sometimes in the past ( Silmics aren't original caps , for sure )
probably mistake was made during re-assembling wires back to switches-connectors
try harder with pictures
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
Thanks! I can try to solder in another attenuator. Will more resistance one decrease the gain (it is too much of it now. do not use more than two steps up)?
atten doesn't have influence on gain
I already wrote few times what's needed to decrease gain of SL10
if you can't find these posts , buzz and I'll repost sch and procedure
check resistance (with ohmmeter) between L&R hots prior and post selector
I already wrote few times what's needed to decrease gain of SL10
if you can't find these posts , buzz and I'll repost sch and procedure
check resistance (with ohmmeter) between L&R hots prior and post selector
Ok, got it. Yep, of cause not gain wrong word, sorry. I will check resistance today. Another thing, I already bought a PCB of B1, cause I would like to replace the SL-10 with B1 and pearl 2, do you think I will "gain" 🙂 in sound quality compare to sl-10?
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?
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
I prefer to decrease CLG of stage , not further weakening of signal ......... doing same thing as with pot on 8,5h
name of the game is - signal energy preservation , not convenience of full shaft rotation
name of the game is - signal energy preservation , not convenience of full shaft rotation
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?
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