NS02B5K600FE12
This looks like quite a good choice for R13 right? better specs than the recommended cff02, which isn't available in 5.6kOhm for my low gain build.
Overkill for this position?
This looks like quite a good choice for R13 right? better specs than the recommended cff02, which isn't available in 5.6kOhm for my low gain build.
Overkill for this position?
It would work with a 1W spec part too. No problem if it physically fits though. But is this the black 5K6/3W quality one that Stajo photographed in his?
I still can't decide on resistors for all the other positions. I'm either going with "regular" rn55/cmf55 from dale or the ptf56 0.1% 15ppm. The only thing keeping me from the second ones is the price, at least double than the other. Does the better % and lower ppm make a difference? It will make better matching between channels for sure, but will it be an improvement over the already nice dales?
Thank you. I assume it might fit nicely. I'll buy it today.
So far, I use 1.2K CFP and I just finished to assamble 63dB setup.
Hovewer, I have an issue. TP1-TP2 is getting -0.650 on both sides.
When I turn ON it jumps to +7.5V and then getting to that -0.650 value in 4 sec. same when I turn it OFF.
R13 is about 70 deg C.
My B+ is initialy set to 36V and Vin is little low +45V due to some V drop from K-Multy from Keantoken.
Tested all resistors value once again. No error there. All set per spec. Please help.
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No. I kinda scared to touch anything before consalting with you. I'll try in sec...
Weeeeeee....
It works. With B+ 34V, my TP1-TP2 is about 3V now. 🙂.
I'll start BIASing tomorrow...
Thank you.
Forgot to mention... I assambled some AC filter/conditioner and love it very much. It changed my sound dramaticaly.
For guys who is interested in some version of Power condininer, please see detailes here (post #53):
http://www.diyaudio.com/forums/power-supplies/246394-dc-blockers-mains-filters-6.html#post4222123
It works. With B+ 34V, my TP1-TP2 is about 3V now. 🙂.
I'll start BIASing tomorrow...
Thank you.
Forgot to mention... I assambled some AC filter/conditioner and love it very much. It changed my sound dramaticaly.
For guys who is interested in some version of Power condininer, please see detailes here (post #53):
http://www.diyaudio.com/forums/power-supplies/246394-dc-blockers-mains-filters-6.html#post4222123
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Good. What to do with test points and VR2x is in the manual in more detail also.
Nicely built AC power stuff. Congrats. Let us know how your modded cart behaves when all things with new gain configuration are sorted out soon.
Nicely built AC power stuff. Congrats. Let us know how your modded cart behaves when all things with new gain configuration are sorted out soon.
Yes, I memorized your manual from A till Z, but I confused by that negative Voltage...🙂.
Definately, I'll let you know how it is going with my new cart.
Thank you very much.
From the manual:
-Measure between TP1 and TP2. Red probe on TP1. Looking for a 3-4V range reading.
-If it reads much less, lower the rail voltage via VR2x slowly for taking TP1-TP2 to ballpark.
-If it reads much high, turn up B+ slowly. Let it alone for a minute. Tweak VR2x for 3.6V.
-Lastly use VR1 for better resolution tweaking at TP1-TP2.
To clarify: Negative is also "much less" than 3 to 4V so don't let it confuse anyone else from now on.
-Measure between TP1 and TP2. Red probe on TP1. Looking for a 3-4V range reading.
-If it reads much less, lower the rail voltage via VR2x slowly for taking TP1-TP2 to ballpark.
-If it reads much high, turn up B+ slowly. Let it alone for a minute. Tweak VR2x for 3.6V.
-Lastly use VR1 for better resolution tweaking at TP1-TP2.
To clarify: Negative is also "much less" than 3 to 4V so don't let it confuse anyone else from now on.
So a few more questions regarding resistors:
My cart ( goldring 1012GX) has a recommended load resistance of 47k, any reason why I would need the Rx1-4 resistors and dip switch? What changes can I expect if I use a different resistance?
Is 47.5k acceptable for R1?
My cart ( goldring 1012GX) has a recommended load resistance of 47k, any reason why I would need the Rx1-4 resistors and dip switch? What changes can I expect if I use a different resistance?
Is 47.5k acceptable for R1?
Some experimental changes you may expect. Read this: Load the Magnets!!! - [English]
If you don't wanna bother, just don't stuff the DIP and all Rx. Bring the coax from RCA IN directly across R1 or to nearest pads. So to skip the now unused and exposed paths. 47.5K is fine.
If you don't wanna bother, just don't stuff the DIP and all Rx. Bring the coax from RCA IN directly across R1 or to nearest pads. So to skip the now unused and exposed paths. 47.5K is fine.
The TT cable's and JFET input capacitance are enough for your cart too. So in your case it does not seem valuable to use the DIP switch for selecting various Cx either.