Single-ended Sony VFETs are in process. At the moment obtaining bracket quotes.
Good to hear. This is one I have been anxiously waiting on.
Single-ended Sony VFETs are in process. At the moment obtaining bracket quotes.
Single ended VFET interests me. More to my tastes.
I built the CSX1 DIY VFET and have been listening for a while and I find it to be a nice amp with the upper registers to be crisp and clear and very quite but the midrange is not up to the F3, or just different. I felt the same way about the M2 in that the F3 was more involving. I wonder what the VFET 2 would sound like with multiple output pairs?
I am finding that I go back to my DIY Aleph 2, six output devices, and the DIY F3, both single ended.
I still have a couple of VFET pairs to play with for single ended.
BDP
Hi everyone!
I would love to make this wonderful Sony V-FET Amp designed by Mr. Pass although I am at least one year late.
But still planning to purchase PCBoards with hopes to find someday in future real Sony V-FETs.
I have a few questions about this project.
1. Is it OK to go full on Vishay Dale RN60 resistors? Their power rating are 1/4 W at 70 °C
Or better chose Vishay Dale CMF60 resistors which power rating are 1 W at 70 °C?
I thought RN should be better but CMF have better spec's here and there.
2. Would it be a waste of money to use Bourns 3345P single turn potentiometers?
Temperature Coefficient ±50 ppm/°C
Resistance Tolerance ±5 %
Power Rating 1 W at 70 °C
Contact Spring is of palladium silver-based alloy.
Gold plated legs.
Also this potentiometer look nice and realiable.
3. I got reply from diyAudio Store that at present there are no plans to restock the TO3 brackets.
Can anyone recommend where I can order a pair of anodized aluminum T profile brackets with milling from Nelson's drawing?
I saved both drawings in inches and millimeters.
4. Are restocked diyAudio Store PCBoards have any difference in quality from boards in Essential Kits?
Like immersion tin vs immersion gold finish for example.
5. Diode bridge rectifier should be 35A 200V?
And I'd be grateful for recommendations of a good toroidal transoformer for 230V/50Hz line. )
Thank you.
I would love to make this wonderful Sony V-FET Amp designed by Mr. Pass although I am at least one year late.
But still planning to purchase PCBoards with hopes to find someday in future real Sony V-FETs.
I have a few questions about this project.
1. Is it OK to go full on Vishay Dale RN60 resistors? Their power rating are 1/4 W at 70 °C
Or better chose Vishay Dale CMF60 resistors which power rating are 1 W at 70 °C?
I thought RN should be better but CMF have better spec's here and there.
2. Would it be a waste of money to use Bourns 3345P single turn potentiometers?
Temperature Coefficient ±50 ppm/°C
Resistance Tolerance ±5 %
Power Rating 1 W at 70 °C
Contact Spring is of palladium silver-based alloy.
Gold plated legs.
Also this potentiometer look nice and realiable.
3. I got reply from diyAudio Store that at present there are no plans to restock the TO3 brackets.
Can anyone recommend where I can order a pair of anodized aluminum T profile brackets with milling from Nelson's drawing?
I saved both drawings in inches and millimeters.
4. Are restocked diyAudio Store PCBoards have any difference in quality from boards in Essential Kits?
Like immersion tin vs immersion gold finish for example.
5. Diode bridge rectifier should be 35A 200V?
And I'd be grateful for recommendations of a good toroidal transoformer for 230V/50Hz line. )
Thank you.
Hi everyone!
I would love to make this wonderful Sony V-FET Amp designed by Mr. Pass although I am at least one year late.
But still planning to purchase PCBoards with hopes to find someday in future real Sony V-FETs.
I have a few questions about this project.
1. Is it OK to go full on Vishay Dale RN60 resistors? Their power rating are 1/4 W at 70 °C
Or better chose Vishay Dale CMF60 resistors which power rating are 1 W at 70 °C?
I thought RN should be better but CMF have better spec's here and there.
2. Would it be a waste of money to use Bourns 3345P single turn potentiometers?
Temperature Coefficient ±50 ppm/°C
Resistance Tolerance ±5 %
Power Rating 1 W at 70 °C
Contact Spring is of palladium silver-based alloy.
Gold plated legs.
Also this potentiometer look nice and realiable.
3. I got reply from diyAudio Store that at present there are no plans to restock the TO3 brackets.
Can anyone recommend where I can order a pair of anodized aluminum T profile brackets with milling from Nelson's drawing?
I saved both drawings in inches and millimeters.
4. Are restocked diyAudio Store PCBoards have any difference in quality from boards in Essential Kits?
Like immersion tin vs immersion gold finish for example.
5. Diode bridge rectifier should be 35A 200V?
And I'd be grateful for recommendations of a good toroidal transoformer for 230V/50Hz line. )
Thank you.
1. I believe regular metal films , rated at 600mW m are of same quality as any of those ; Russia is big country , find those locally
2.whatever pleases you ; for reference always look what Papa is using , then think
3.again - Russia is big country , find those locally , and drill them by drawing . Nearest metal hardware store is place to look in.
4. They're , no doubt , more than good enough
5. yes ; or more ..... ; sometimes you pay less for those sold in bigger numbers , even if they're having ,say, greater voltage
6. again - Russia is big country , find those locally ; if not , visit toroidy.pl
I am currently getting volume quotes on the brackets that have the same
dimensions as the ones offered previously in the store, having two TO-3
positions ans two holes for TO-246 (TO-3P) and the holes for the Universal
Mounting spec from diyaudio.
I expect these bracket to support several future kits which will certainly be
offered to the store.
Anyway, it takes a little time for this, even after the order is placed.
dimensions as the ones offered previously in the store, having two TO-3
positions ans two holes for TO-246 (TO-3P) and the holes for the Universal
Mounting spec from diyaudio.
I expect these bracket to support several future kits which will certainly be
offered to the store.
Anyway, it takes a little time for this, even after the order is placed.
well , that's certainly your problem , not mine
I could understand some of it , that MC pre is in case ........ but hardly for power amp
The RN60 and CMF60 are the same resistor with different paint. The RN60 is military rated power measurements, and the CMF60 is industrial rated power measurements. But they are the exact same resistor. Even says so in the RN60 datasheet.
Thank you, vanofmonks.
You're right. Where was my eyes..
Quote from CMF Industrial datasheet:
Vishay Dale Model CMF is also available as Military Qualified Styles RN and RL. See Vishay Dale’s CMF (Military RN and RL) for the MIL-SPEC ratings / attributes. (Except for marking, the Industrial and Military versions are exactly the same).
You're right. Where was my eyes..
Quote from CMF Industrial datasheet:
Vishay Dale Model CMF is also available as Military Qualified Styles RN and RL. See Vishay Dale’s CMF (Military RN and RL) for the MIL-SPEC ratings / attributes. (Except for marking, the Industrial and Military versions are exactly the same).
Will the holes be on exact position as in previous brackets, or are just physical dimensions the same?
shortly, will new brackets be 100% copy of old one?
Believe the to-246 is bigger. If the same as old bracket it would much simpler for someone to just copy the old bracket or just make some more.