F6 Illustrated Build Guide

[abebernis]

Listen to F6 is like a orgasm. 🙂
Thanks to you all friends for helps... first to Nelson.


https://youtu.be/nGiTzH0avBs

 

[vdi_nenna]

Really nice. Sounds like a real piano.

 

[william2001]

Ya, I agree. I just recently got my F6 monoblocks running again with SS R100's (had IRFP240's). I've had F5, Aleph J, and BA-1, but I could be done building amps for awhile if these early impressions hold up.

 

[Bare]

ss R100? What? why? and how? 😱

 

[2 picoDumbs]

ss R100? What? why? and how? 😱

Semisouth SiC mosfet but they are no longer manufactured.
You might find some if you're lucky.

 

[abebernis]

Semisouthfan maybe..

SM-N910C cihazımdan Tapatalk kullanılarak gönderildi

 

[Zen Mod]

Semisouthfan is having them , at least for my knowledge

 

[william2001]

I bought matched pairs from Teabag several years ago. If I remember correctly the SS parts have about half the distortion of the regular IRF parts. Allows more headroom for 2nd/3rd harmonic distortion profile adjustment preference. (I'm using the store boards with 0 ohms at R1, and .04 ohms at R2, cut trace from negative side of C2 and reconnected to -23V). And really nice that this thing is completely stable with very low/no source resistors. Really pleased with this configuration right now.

 

[Bare]

🙄 Thanks I realised what ssr100 was..a few mins too late tho.
The Pedestrian version will be enough challenge for me.. so far.
Heatsinks in hand finally .. 7+ lbs of Ali. That should work.

 

[vdi_nenna]

I have F6 R100 Jfet and finishing F6 mosfets soon. Won't be direct comparison because the R100 version is dual mono and the F6 mosfets version is not. Still should be interesting to hear none the less.

 

[Russellc]

Russell do you use your store's chassis without the bottom panel? I've been thinking of doing so because all the necessary stuff attaches to the metal bottom plate and this way maximize airflow.

Now that I have it on, I can tell you that BA-3 in 5U with 32 volt rails and 3 pairs per side, WITH the bottom cover on and a cat sleeping on top, temps are fine.😀

Also, F-6 in 4U is fine temp wise with bottom cover attached...WITH or without the Cat on top.

Russellc

 

[2 picoDumbs]

I have F6 R100 Jfet and finishing F6 mosfets soon. Won't be direct comparison because the R100 version is dual mono and the F6 mosfets version is not. Still should be interesting to hear none the less.

With or without any ac degeneration?
Are you able to tune them for same harmonic distortion?
Or just a raw comparison?

 

[vdi_nenna]

The R100 jfet version is tunable by variable resistors. The MOSFET version is fixed. Used the values in the schematic.
I'm interested to hear what others are hearing in the MOSFET version and how it compares the the values I chose in the jfet version.

 

[2 picoDumbs]

The R100 jfet version is tunable by variable resistors. The MOSFET version is fixed. Used the values in the schematic.
I'm interested to hear what others are hearing in the MOSFET version and how it compares the the values I chose in the jfet version.

Both versions are variable, you just need to make a slight modification to the mosfet circuit.
Otherwise it's not a fair comparison. It will end up being a circuit comparison not a device comparison. Potentially misleading result.

 

[vdi_nenna]

Actually its about two amps and how they sound once plugged into my system.
That's all.

 

[2 picoDumbs]

Actually its about two amps and how they sound once plugged into my system.
That's all.

Nothing wrong with that.
Just important that people understand what the comparison is.
Great work by the way.

 

[guglielmope]

Hello William2001,
how you determinate your value of R1 (none) and R2 (0.04ohm)?
Regards
Guglielmo

 

[drpro]

Question, can the F6 be bridged like the F4 to create a more powerful monoblock?

Thanks

 

[Zen Mod]

yes

see Funny6

 

[drpro]

Great. I really love the sound of the F6. I have another F4 in the build process for mono. Guess I will be adding another F6.
DIY is such a wonderful way to spend one's money!!