Has anyone tried IXYS IXFN140N20P or IXFN140N30P FETs in the F6 circuit. Some modification to the biasing might be needed and the gate stoppers should be reduced to 47R. This might be a good build for a push-pull version of Nelson's BAF2015 amp: BAF 2015 Coverage
Hi has anyone implementet the stereo version of the FW powersupply presented in the F6 burning amp notes (see attachement)?
I find it interesting as half of the Rs and the last Cs are dedicated to each channel. Does this in any way benefit e.g. with regards to channel separation (stereo perspective, which is good on the F6 already 🙂 ).
I find it interesting as half of the Rs and the last Cs are dedicated to each channel. Does this in any way benefit e.g. with regards to channel separation (stereo perspective, which is good on the F6 already 🙂 ).
Attachments
just go for it
or go dual mono ; several examples on my blog
in short -one channel :mains fuse, 250VA Donut , two bridges , 4 pcs 33mF/25Vdc
each channel having own CL60 from audio gnd to case
so , just power cord, IEC and switch are common for both channels
or go dual mono ; several examples on my blog
in short -one channel :mains fuse, 250VA Donut , two bridges , 4 pcs 33mF/25Vdc
each channel having own CL60 from audio gnd to case
so , just power cord, IEC and switch are common for both channels
Thanks ZM I´ll leave this issue 😕. I was looking for the reason/intent behind this design.
Ill try dual mono in my M2 build (2x200 VA would be enough?), I already have the std supply working well in my F6 using a 400VA toroid.
Ill try dual mono in my M2 build (2x200 VA would be enough?), I already have the std supply working well in my F6 using a 400VA toroid.
intent is better channel separation , better dynamic behavior , smaller ripple , etc.
M2 , being on cooler side - 200VA per channel should be enough
ignore fact that I chose 250VA as lowest value I use , mostly better sleep being the reason
M2 , being on cooler side - 200VA per channel should be enough
ignore fact that I chose 250VA as lowest value I use , mostly better sleep being the reason
Sleep is overrated 🙂 I find the 400VA and 8x18000uf in my F6 give excellent bass, even driving 86-87db two-ways in our living room high WAF system 🙂.
However my persistence regarding the schematic (see +V_A, +V_B and -V_A, -V_B in my earlier attachment ) was the nagging feeling/hope that one could get 70-80% of the benefits of mono supplies from this single stereo supply with no additional cost.
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70-80%
sure, spot on !
(take in account that only guys obsessed with audio electronics are bigger liars than fishermen
)
sure, spot on !
(take in account that only guys obsessed with audio electronics are bigger liars than fishermen
)Thanksk Claas much appreciated and I am looking forward to building it. It might take more time as transformer, chassis which is a major one to be brought for the M2X amp.
🙂 🙂
70-80%
sure, spot on !
(take in account that only guys obsessed with audio electronics are bigger liars than fishermen
If the powersupply is built into a separate box, is there any practical distance limit ( with regard to performance, electrical and sound) I.e. if I would build 2 mono supplies into one box and have 2 umilicals, one to each mono amp unit placed on wall behind speakers? The umbilicals would have to be 2-3m long. I have had a great tube pre with a 1m umbilical to the powersupply. Sounded great, no hum etc. This would be for my extremely low WAF system in my cave 🙂
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considering currents involved , umbilical must be heavy gauge , to ensure low voltage sag
just make two monoblocks , and be done 🙂
just make two monoblocks , and be done 🙂
Yes you are probably right ZM. Lot less hassle. But It could be fun to be able to simply change flavors by connecting another FW amp unit to umbilical 🙂
tempted and might built most of them if I had the cash.
taking in account that you're on this side of Big Pond ...with some time invested in clever searching , you can make decent Papamp for 500-600 Euros , in parts ; everything in industrial quality
we all know what kind of quality ( both - build and sound) you can buy from commercial made products - all bells and whistles and buzz , but sound nowhere
make one , to have an amp to enjoy , then you can slowly search surplus places and junkyards , and stash enough peanut priced parts , to make next ones ..... just for fun and enjoyment in building
if you need more specific help in chasing parts , just buzz
we all know what kind of quality ( both - build and sound) you can buy from commercial made products - all bells and whistles and buzz , but sound nowhere
make one , to have an amp to enjoy , then you can slowly search surplus places and junkyards , and stash enough peanut priced parts , to make next ones ..... just for fun and enjoyment in building
if you need more specific help in chasing parts , just buzz
I have both +/-23V and +/-29V umbilical power supplies. Both are dual mono. The 23V supply is CLC while the 29V is CRC. Standard NP supplies
In attached pics the 23V is used for my SUSY F6 and M2. The 29V is for VFeT2.
M2x will be tried with both.
I think the real advantage is that you can build different amps without having to replicate power supplies.
Just my feeling.
Best
Bob
In attached pics the 23V is used for my SUSY F6 and M2. The 29V is for VFeT2.
M2x will be tried with both.
I think the real advantage is that you can build different amps without having to replicate power supplies.
Just my feeling.
Best
Bob
Attachments
kbergsson,
For the umbilical power cables what sort of connector do you have in mind?
Edit: saw flocchini's post.
Bob,
What connectors are using?
For the umbilical power cables what sort of connector do you have in mind?
Edit: saw flocchini's post.
Bob,
What connectors are using?
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