CH-4 is a good fit for LuFo, more inductance is better
4A current rating is fine. You need two of these chokes for stereo amp.
4A current rating is fine. You need two of these chokes for stereo amp.
The CH-4 is better because you are still within operating current range and you have higher inductance. The higher inductance means it can store more energy to provide the opposing output swing on higher volume - better performance before clipping occurs.
I have some progress.
I've ordered parts with the shared mouser shopping cart by Vunce.
I noticed that shopping cart was not latest version later.
I've reordered and installed C132,134,171,173 as 680uF ones.
V122,V162 was not necessary.
I need to order these.
I have a question.
C122, C162 - C1206 22p, 15V or 50V or 100V. Which voltage is correct?
I installed a 100V one already. https://www.mouser.kr/ProductDetail/KEMET/C1206C220J1GACTU?qs=0o7GJvaaAD5Q2XtoystSpw==
I've ordered parts with the shared mouser shopping cart by Vunce.
I noticed that shopping cart was not latest version later.
I've reordered and installed C132,134,171,173 as 680uF ones.
V122,V162 was not necessary.
I need to order these.
- latest BOM missing parts (R181,R191,R183,R193,R184,R194,C184,C194)
- test point pins (534-5001, 534-5117)
- MELF Resistors 0.4W 100ohms (594-MMA02040C1000FB0) on LU1014D adapter board.
- Samtec terminal (200-HPM0301TSVS) on LU1014D adapter board.
- and most important matched LU1014D 2pcs.
I have a question.
C122, C162 - C1206 22p, 15V or 50V or 100V. Which voltage is correct?
I installed a 100V one already. https://www.mouser.kr/ProductDetail/KEMET/C1206C220J1GACTU?qs=0o7GJvaaAD5Q2XtoystSpw==
It was designed for 8ohms - I would have to run simulations. But probably about 50% more power if we don’t redo the set points.
@namghiwook
Either voltage capacitor is fine.
@namghiwook
Either voltage capacitor is fine.
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I found this SMPS on Micro Audio.
https://micro-audio.com/store/product/smps630-so/
Is it for Lufo amp?
https://micro-audio.com/store/product/smps630-so/
Is it for Lufo amp?
The 630SO is for the TPA3255 Class D amp (choose 51v).
You want the 500-CLA for Class A applications. It’s designed for continuous high current operation.
https://micro-audio.com/store/product/smps500-cla/
You want the 500-CLA for Class A applications. It’s designed for continuous high current operation.
https://micro-audio.com/store/product/smps500-cla/
Lufo amp requires single positive voltage, but SMPS500-CLA has bipolar output,
Is it proper for Lufo amp? and without any extra capacitors?
SMPS630-SO has single rail main voltage output ..so I have a plan to use this with extra capacitors like this.
I am not sure about that.
I'll have to consider your SLB this time too.
Is it proper for Lufo amp? and without any extra capacitors?
SMPS630-SO has single rail main voltage output ..so I have a plan to use this with extra capacitors like this.
I am not sure about that.
I'll have to consider your SLB this time too.
You are correct, @namghiwook. LuFo needs single voltage. The SMPS630SO should work well @ 28VDC.
As another option, I was going to use one Meanwell RPS-200-27C per channel in my LuFo build. They work great with the DiyAudio Store power supply boards. Previous Post
I ended up going in another direction and used the same power supply setup for my TDV amplifier. At 28VDC, the amp runs great and has for many months straight.
As another option, I was going to use one Meanwell RPS-200-27C per channel in my LuFo build. They work great with the DiyAudio Store power supply boards. Previous Post
I ended up going in another direction and used the same power supply setup for my TDV amplifier. At 28VDC, the amp runs great and has for many months straight.
Sorry about that - you are right. There was another unit Sami made for me that was single rail for Class A. I forget the model number though but I did order it to use for the LuFo just never got around to it once I saw the linear trafo worked out fine.
Maybe I’ll go for it and take a chance. I guess nobody has use that model. If I go for it I’ll update this thread.
It’s 120vac model so most likely it’s fine at circa 0.5ohm dcr. For $29ea it’s worth the risk. 16 available here:
https://www.certified-parts.com/md601amr-md-microwave-high-voltage-transformer-md-601amr-1
https://www.certified-parts.com/md601amr-md-microwave-high-voltage-transformer-md-601amr-1
Ok, I received my 2 MOT which are the same model but read differently...
MOT no.1 DCR 0.5 ohm, L 50mH
MOT no.2 DCR 0.5 ohm, L 130mH
What could cause such a difference?
Could I still use them although the L value is very different?
BTW, I was expecting much bigger MOT, these are for 600W oven.
Thanks
Eric
MOT no.1 DCR 0.5 ohm, L 50mH
MOT no.2 DCR 0.5 ohm, L 130mH
What could cause such a difference?
Could I still use them although the L value is very different?
BTW, I was expecting much bigger MOT, these are for 600W oven.
Thanks
Eric
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The difference in L won’t matter. That just means it has deeper reserve for more bass in that channel but 50mH and 0.5R is perfect. There might be something different on the airgap of the one with the higher L. It may have been bumped and gap is smaller, and hence inductance higher due to better efficiency of the iron core.