• These commercial threads are for private transactions. diyAudio.com provides these forums for the convenience of our members, but makes no warranty nor assumes any responsibility. We do not vet any members, use of this facility is at your own risk. Customers can post any issues in those threads as long as it is done in a civil manner. All diyAudio rules about conduct apply and will be enforced.

PeeCeeBee V4H GB

Jump to Latest
#381
GB Update:

Ajit - 2 STEREO MODULES - PAID
steefdebruijn - 2 PCBS - PAID
amitskamal - 1 STEREO KIT - PAID
Neurotica - 2 PCBs - PAID
vvs07 - 4 PCBs - PAID
outtek - 2 PCB + 4 PAIR MOSFET - PAID
ejno - 2 PCBS - PAID
craydive - 4 PCBS - PAID
PinkPink - 4 PCBs - PAID
J.M.K - 4 PCBS + 2 PAIR MOSFET - PAID
CitizenKane - 4 PCBs - PAID
gaborbela - 2 PCBs - PAID
Kheon - 2 PCB's - PAID
Oracle1 - 2 PCBs + 4 PAIR MOSFET - PAID
hallcon83 - 4 PCBs - PAID
Sadik - 2 PCBs + 4 PAIR MOSFET - PAID
smouse - 2 PCBS - INVOICE SENT
The Prof - 1 STEREO KIT - INVOICE SENT

I have ordered 100 PCBs again, so feel free to join GB2! 🙂

If there is a mistake in the list then please let me know.

Thanks.
 
#382
Sorry, but now I have a doubt:
Is one pair of mosfets equal to a set, that is what's necessary for 1 board?
Do I need 2 or 4 pairs for 2 boards?
In case I need 4 pairs for 2 boards, I'll have to modify/update my order!
Sorry for the trouble

Jmk
 
#383
Hi J.M.K

A set is four pairs, for two V4H channels.

For four V4H channels two sets i.e. eight pairs will be needed. I usually don't use Set and just mention them in Pairs for clarity in the GB list e.g. outtek, oracle1 and sadik's entry.
 
#385
shaan said:
GB Update:

Ajit - 2 STEREO MODULES - PAID
steefdebruijn - 2 PCBS - PAID
amitskamal - 1 STEREO KIT - PAID
Neurotica - 2 PCBs - PAID
vvs07 - 4 PCBs - PAID
outtek - 2 PCB + 4 PAIR MOSFET - PAID
ejno - 2 PCBS - PAID
craydive - 4 PCBS - PAID
PinkPink - 4 PCBs - PAID
J.M.K - 4 PCBS + 2 PAIR MOSFET - PAID
CitizenKane - 4 PCBs - PAID
gaborbela - 2 PCBs - PAID
Kheon - 2 PCB's - PAID
Oracle1 - 2 PCBs + 4 PAIR MOSFET - PAID
hallcon83 - 4 PCBs - PAID
Sadik - 2 PCBs + 4 PAIR MOSFET - PAID
smouse - 2 PCBS - INVOICE SENT
The Prof - 1 STEREO KIT - INVOICE SENT
J.M.K - + 2 PAIR MOSFET
Click to expand...

For the missing set

Jmk
 
#387
GB Update:

Ajit - 2 STEREO MODULES - PAID
steefdebruijn - 2 PCBS - PAID
amitskamal - 1 STEREO KIT - PAID
Neurotica - 2 PCBs - PAID
vvs07 - 4 PCBs - PAID
outtek - 2 PCB + 4 PAIR MOSFET - PAID
ejno - 2 PCBS - PAID
craydive - 4 PCBS - PAID
PinkPink - 4 PCBs - PAID
J.M.K - 4 PCBS + 2 PAIR MOSFET - PAID
CitizenKane - 4 PCBs - PAID
gaborbela - 2 PCBs - PAID
Kheon - 2 PCB's - PAID
Oracle1 - 2 PCBs + 4 PAIR MOSFET - PAID
hallcon83 - 4 PCBs - PAID
Sadik - 2 PCBs + 4 PAIR MOSFET - PAID
smouse - 2 PCBS - INVOICE SENT
The Prof - 1 STEREO KIT - INVOICE SENT
Vunce - 2 PCBs + 4 PAIR MOSFET - PAID
 
#391
Ok, is that with the matched Q1, Q2? How to match electrons and holes Npn to Pnp or what means your matching?
Specs are impressive, 2nd harmonics down to a few pW range!
Goes in fW range at 100W 10khz
Not many can archive that, avg32, 64 ok.
250W in 4 ohms, impressive.
Have you done a test in loudspeaker element eg a woofer 100-150hz ~> 500w 4mH
how many watts before instability accurs?

SNR. Better than most sound cards can really do, congratulations!
 
Last edited:
#392
GB Update:

Ajit - 2 STEREO MODULES - PAID
steefdebruijn - 2 PCBS - PAID
amitskamal - 1 STEREO KIT - PAID
Neurotica - 2 PCBs - PAID
vvs07 - 4 PCBs - PAID
outtek - 2 PCB + 4 PAIR MOSFET - PAID
ejno - 2 PCBS - PAID
craydive - 4 PCBS - PAID
PinkPink - 4 PCBs - PAID
J.M.K - 4 PCBS + 2 PAIR MOSFET - PAID
CitizenKane - 4 PCBs - PAID
gaborbela - 2 PCBs - PAID
Kheon - 2 PCB's - PAID
Oracle1 - 2 PCBs + 4 PAIR MOSFET - PAID
hallcon83 - 4 PCBs - PAID
Sadik - 2 PCBs + 4 PAIR MOSFET - PAID
smouse - 2 PCBS - INVOICE SENT
The Prof - 1 STEREO KIT - INVOICE SENT
Vunce - 2 PCBs + 4 PAIR MOSFET - PAID
Arthur -6pcs.....
 
#393
Very good power supply used anyway, the usual linear some magnetic fields on 2nd harmonics seen pW range perhaps 🙂

measure the phase gain over audio. freq.
it's really ease.

To be clear rta software was used,
and soundcard measurement.
Will you do more measurements Shaan? 🙂
16 boards no way Shaan.
Cnc, or old diy board for me if I tried this one!. 🙂
 
#394
tonza75 said:
Ok, is that with the matched Q1, Q2? How to match electrons and holes Npn to Pnp or what means your matching?
Specs are impressive, 2nd harmonics down to a few pW range!
Goes in fW range at 100W 10khz
Not many can archive that, avg32, 64 ok.
250W in 4 ohms, impressive.
Have you done a test in loudspeaker element eg a woofer 100-150hz ~> 500w 4mH
how many watts before instability accurs?
Click to expand...

Matching = HFE matching.

Yes harmonics are pretty low, thanks to D. Self, and harmonic spectrum is sweet, thanks to Late P. Baxandall. They didn't work hand-in-hand from the start. It was hell... lots of innocent mosfets died. But their deaths weren't in vain. 🙂

Loudspeaker load measurement hasn't been done, don't care really. In my room a channel is driving my 10" sealed sub pair in parallel, each sub rated 200w 8ohm, 56v psu. So far zero hiccups.

SNR. Better than most sound cards can really do, congratulations!
Click to expand...

Thanks.

tonza75 said:
Very good power supply used anyway, the usual linear some magnetic fields on 2nd harmonics seen pW range perhaps 🙂
Click to expand...

Basic CRC power supply used with KBPC3510 bridge rectifier.

measure the phase gain over audio. freq.
it's really ease.
Click to expand...

No time, but more importantly, I don't care.

As I didn't attempt designing a precision amplifier, decided to stop splitting hair after a certain sound quality was reached. Some hairs have been split, and some torn (from my head) - it is indeed not very easy to reach that noise floor even when averaging is turned on with an on-board sound card, as you adequately put. 🙂

To be clear rta software was used,
and soundcard measurement.
Click to expand...

Correct. 10/10! 😛

Will you do more measurements Shaan? 🙂
Click to expand...

Naahhh...

16 boards no way Shaan.
Cnc, or old diy board for me if I tried this one!. 🙂
Click to expand...

All the bests. :cheers:
 
#396
Oracle1 said:
KP1830 220pF (0.22nF) 160V Polypropylene Capacitors or the polysterine nor the ceramic , maybe the silver mica which is best?
Click to expand...

If you can get silver mica then close your eyes and grab them!!!

If you can not, then go for ceramic.

If neither silver nor ceramic is available then polypropylene (I guess size will be a problem with polypropylenes) or polystyrine.
 
#400
GB Update:

Ajit - 2 STEREO MODULES - PAID
steefdebruijn - 2 PCBS - PAID
amitskamal - 1 STEREO KIT - PAID
Neurotica - 2 PCBs - PAID
vvs07 - 4 PCBs - PAID
outtek - 2 PCB + 4 PAIR MOSFET - PAID
ejno - 2 PCBS - PAID
craydive - 4 PCBS - PAID
PinkPink - 4 PCBs - PAID
J.M.K - 4 PCBS + 2 PAIR MOSFET - PAID
CitizenKane - 4 PCBs - PAID
gaborbela - 2 PCBs - PAID
Kheon - 2 PCB's - PAID
Oracle1 - 2 PCBs + 4 PAIR MOSFET - PAID
hallcon83 - 4 PCBs - PAID
Sadik - 2 PCBs + 4 PAIR MOSFET - PAID
smouse - 2 PCBS - INVOICE SENT
The Prof - 1 STEREO KIT - INVOICE SENT
Vunce - 2 PCBs + 4 PAIR MOSFET - PAID
Vunce - 2 PCBs
Arthur -6pcs.....
 
You must log in or register to reply here.
Top Bottom