Hi There!
I got me a threshold sl10. It sounds great. better as the modified AVM. Instead of building me a P1.7, maybe I will do that later on.
Now I have several questions. The power supply caps are looking allright to me and also the caps on the pre-pcb are looking allright.
In the PS there are Mallory 4700 uf 60VDC and in the pre there are Instrument devices C221-4713 and 4705. What's the value of them?
There are also 2 red silver mica caps 50PF, I think, one in each channel, are getting a little black inside. Are they no good anymore?
And again the caps are looking good, but that does not mean they will be allright, is it?
But again the sound is very good, I've never heard anything better in my set. Maybe upgrading will made it better.
Who can help me? Thanks allready! Greetings Teake.
I got me a threshold sl10. It sounds great. better as the modified AVM. Instead of building me a P1.7, maybe I will do that later on.
Now I have several questions. The power supply caps are looking allright to me and also the caps on the pre-pcb are looking allright.
In the PS there are Mallory 4700 uf 60VDC and in the pre there are Instrument devices C221-4713 and 4705. What's the value of them?
There are also 2 red silver mica caps 50PF, I think, one in each channel, are getting a little black inside. Are they no good anymore?
And again the caps are looking good, but that does not mean they will be allright, is it?
But again the sound is very good, I've never heard anything better in my set. Maybe upgrading will made it better.
Who can help me? Thanks allready! Greetings Teake.
I think the electrolytics were 470 uF at 25V or so.
The Micas should last forever, so I wouldn't worry about them.
The Micas should last forever, so I wouldn't worry about them.
Hi Teake ,
nice to hear that the Treshold sound better than that German Pre ,
no wonder for me , i had the same expirience years ago !
Greetings from Germany
Jürgen
nice to hear that the Treshold sound better than that German Pre ,
no wonder for me , i had the same expirience years ago !
Greetings from Germany
Jürgen
Thanks Nelson and Jurgen.
Are the 470uF/25V the bigger ones, and the smaller ones, what value do they have Nelson?
Thanks allready. Teake.
Are the 470uF/25V the bigger ones, and the smaller ones, what value do they have Nelson?
Thanks allready. Teake.
Again, and there is a quad opamp in it, can I replace that too, or does it not matter, and if I should, is there a newer one on the market? Its the RC4136N. Grtz Teake.
intense-tavda said:
http://www.passlabs.com/np/SL10 SCH.tif
if you didn't see that already
this is servo,I presume;
probably old OP is good enough for purpose
besides,you can gain more if you replace that 78 and 79 regs with something better; LM317 and LM337 at least,with some PSU layout rearranging
question for Master :
in your (humble 😉 ) opinion-which one is better sounding:NS10 or SL10 ?
both are soooo wonderfully simple.......
as you can see-we already trance with NS10.........
or I should post this in full range forum ........
in your (humble 😉 ) opinion-which one is better sounding:NS10 or SL10 ?
both are soooo wonderfully simple.......
as you can see-we already trance with NS10.........
or I should post this in full range forum ........
He Choky!
Thanks, you mean replacing the op with lm 317/337 and take a bigger elco buffering. I saw the drawing but can't see the numbers. Maybe you can? Grtz Teake
Thanks, you mean replacing the op with lm 317/337 and take a bigger elco buffering. I saw the drawing but can't see the numbers. Maybe you can? Grtz Teake
intense-tavda said:
nope;
not replacing OP with LMs
OP is operational amplifier ,used there in each stage (4 times-two in phono section and two in line section ) for servo (bringing output to DC null) purpose.
LM317 is positive and LM337 is negative reg 3-legged chips,and I meant that you use them instead 7815 and 7915, respectively
mebbe is easiest way that you just send me that ugly and bad preamp for proper refurbishing;
you'll never see him again, and-you pay for shipping,off course.....
you'll never see him again, and-you pay for shipping,off course.....
He Choky I will try, but on the moment I got no digital camera, so that has to wait. But thanks anyway!
Grtz Teake.
Grtz Teake.
Hi there!
I got a problem with my threshold sl10.
One channel is louder, and I tried to change that with the pots on each channel but it won't work. Somebody can tell me what's wrong.
And again the question about the caps, the bigger ones are 470uF 25V and what about the smaller ones? Thanks Teake.
I realy like this amp and want to make it work proper, because I still find it sounds terrific. Thanks allready! Teake.
I got a problem with my threshold sl10.
One channel is louder, and I tried to change that with the pots on each channel but it won't work. Somebody can tell me what's wrong.
And again the question about the caps, the bigger ones are 470uF 25V and what about the smaller ones? Thanks Teake.
I realy like this amp and want to make it work proper, because I still find it sounds terrific. Thanks allready! Teake.
intense-tavda said:
It's hard to say what's problem from this distance ;(
dirty pot?
bad 47uF cap near OP in bad channel?
is it same when you use different inputs ,not just one?
regarding caps -where "smaller ones " are located ?
any pic?
you know-I don't have any SL10 in front of me 😉
and I doubt that someone with one will read your questions.....
in any case-seems that you must borrow that digicam
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