3.5-4.5V cross R4 is acceptable and try center it at 4V. But its not practical to have a changing Rail+ due to batteries charge variations because it will keep you adjusting.
Since I'm such a slow old geezer I until now thought this was some some pop slang expression on some special electrical coupling for this FET😀
The coin finally dropped as we say here🙂
Looks very very good stajo! So your'e a cartridge swapping kind of a fellow 🙂. What C3/C4 do you have in mind for this?
Regards
Made for exploring a dyna 10x5. Sports an average MM when in need. Thanks. I'm starting it up with 0,1 and 2,2 CC MRs but I have some specials also for later on.
Sure it sports most out there 🙂 Yes, the MR's has been suggested. Interesting to learn about the specials🙂
Regards
I have not heared the MRs yet but I think I know what I will hear or close by. Or maybe not, we will see. My rather unhopeful experience for all the hope-filled ones out there is no better capacitor then the next one for you if you dont know what you want to hear. In combination with the rest pile of stuff.
First of all: all the thingys (except look-feel-smell) you like when playin a kewl 8-incher is reproduction harmonics.
Anyways. My strategy is usually to blaspheme the system with kewl sound more up in the chain. I do like a good bunch of harmonics in my listening, but they are more easily controllable up there. Sometimes uglyer though.
First of all: all the thingys (except look-feel-smell) you like when playin a kewl 8-incher is reproduction harmonics.
Anyways. My strategy is usually to blaspheme the system with kewl sound more up in the chain. I do like a good bunch of harmonics in my listening, but they are more easily controllable up there. Sometimes uglyer though.
So your rather unpleasant answer gives that you have no idea - that you belong amongst the hopeful ones? Did I get it right?
It gives you the answer that I dont belong to an idea. It does not give you the answer that I think ideas are stupid.
I have been listening to my Decca Gold Microscanner for a while now and had forgotten how good it sounds.BUT I cannot seem to get rid of an annoying hum which I cannot hear from my listening seat but is very noticeable when within a metre of the speakers.
I put my Xono clone back in the system and the hum is now only noticed with my ear against the speaker.
The FSP is wired/earthed as per the build guide as was my mc version which was hum free.
Just thought the original p/s was hard wired whereas I am now using the pcb and the transformer is an R core with its secondaries wired in series feeding both supplies on the pcb.Any advice as to how to get this beauty hum free gratefully received.
I put my Xono clone back in the system and the hum is now only noticed with my ear against the speaker.
The FSP is wired/earthed as per the build guide as was my mc version which was hum free.
Just thought the original p/s was hard wired whereas I am now using the pcb and the transformer is an R core with its secondaries wired in series feeding both supplies on the pcb.Any advice as to how to get this beauty hum free gratefully received.
Try with one channel PSU on the transformer only. Check if the hum is there on the active channel still. If gone, then you need double mono or separate secondaries Tx as expected by the Raw PCB design. If the hum is there still then its something about the cart grounding.
Yes the ground/return wires are effectively connected together at the back of the cartridge.
When I first used the Decca years ago it was in a Mission 774 arm with the original plastic mount which had just 3 pins on it so one channels ground wire was just left hanging and no hum.With the SME4 I have the hum whether I connect all 4 wires or just 3 and changing ground connections at the phono end of the arm cable makes no difference whatsoever.
I'll do a search and see if there is a thread.
When I first used the Decca years ago it was in a Mission 774 arm with the original plastic mount which had just 3 pins on it so one channels ground wire was just left hanging and no hum.With the SME4 I have the hum whether I connect all 4 wires or just 3 and changing ground connections at the phono end of the arm cable makes no difference whatsoever.
I'll do a search and see if there is a thread.
I reprise this, very throughout done stajo.
Keep your eyes on your path which everyone watches on with interest.
Let others walk their path in peace.
Regards
Im glad if it ends up where its supposed to🙂
I have a question about R2,R3, im my case R2.
In the Notes 2SK369BL it says "Use corresponding resistor values for R2, R3 from this table..."
Under Gain it says: "For high MC cartridge 2-2,5 mV don't populate Q2, R3, use 68R R2..."
R2 😕
I have a question about R2,R3, im my case R2.
In the Notes 2SK369BL it says "Use corresponding resistor values for R2, R3 from this table..."
Under Gain it says: "For high MC cartridge 2-2,5 mV don't populate Q2, R3, use 68R R2..."
R2 😕
Stajo what is your question about that? It seems clear. Omit Q2 and R3, and for R2 use 68 Ohms. From the photos you posted you already have 68R R2 in place.
Idss mA 10 11 12 13 14 15
Rs ohms 3,0 3,9 5,1 6,8 9,1 11
What are those values?
I mean, I know what Idss are, but the corresponding values for R2, R3?
Rs ohms 3,0 3,9 5,1 6,8 9,1 11
What are those values?
I mean, I know what Idss are, but the corresponding values for R2, R3?
Q2 & R3 are the second FET and its Rs. In your case (43dB type FSP) its one FET only Q1, and its Rs is R2 68R. Q1 must be a matched pair between channels in the 10.5-12.5 mA IDSS range. That is all said in the guide.