This is exactly what I'm using and some people also ran a GB to use those in the DCB1. They're great.
They seem to be pretty much what I'm using. They can work, as long as you don't run the high currents.
Calculate it:
Power in CSS MOSFET = CSS current * Vin - Vout
Power in Reg MOSFET = CSS current * Vout (worst case)
For every watt of power, you'll run 7 degrees over ambient, so say with 2watts you'll get a temp raise of ~14degrees. Add to that the juntion-to-case and case-to-sink resistance.
For example let's say approx 20 degrees temp raise. If your ambient is 30, you're still good to go.
EDIT: And Salas beat me to it
I'm running ~120mA with about 11 volt output voltage and .. hmm ... 18V input, IIRC.
Calculate it:
Power in CSS MOSFET = CSS current * Vin - Vout
Power in Reg MOSFET = CSS current * Vout (worst case)
For every watt of power, you'll run 7 degrees over ambient, so say with 2watts you'll get a temp raise of ~14degrees. Add to that the juntion-to-case and case-to-sink resistance.
For example let's say approx 20 degrees temp raise. If your ambient is 30, you're still good to go.
EDIT: And Salas beat me to it
I'm running ~120mA with about 11 volt output voltage and .. hmm ... 18V input, IIRC.
Thanks for the reply on the Mundorf power caps.
Is the Antek 50va power supply big enough for any stage HR or is the 100va perferred. It certainly doesnt cost more more.
Antek - AN-0515
http://www.antekinc.com/details.php?p=38
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Thanks, I'm going to have to find something that will do. I don't want to sink it to the case.
http://search.digikey.com/scripts/DkSearch/dksus.dll?vendor=0&keywords=RA-T2X-38E
How about these?
http://search.digikey.com/scripts/DkSearch/dksus.dll?vendor=0&keywords=RA-T2X-38E
How about these?
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Why not the one in the BOM? 287-1ABE Wakefield Heatsinks
How many ma can we go up to with these?
How many ma can we go up to with these?
Those are for TO-220 devices, you're looking for TO-247 ones for the MOSFETs. You'll need something slightly bigger for the large currents.
I've just rehoused my blue hypno and replaced the PEC pots with a Valab 20k stepped attenuator from ebay; what a revelation the sound stage size has increased somewhat particularly the depth!.For £20 delivered this is an audio bargain; although I think somebody posted that they were experiencing noise problems after a few months use. I will have to wait and see but in the mean time I'll enjoy its performance.
Hotrod Stage 2 (~600mA) installed
After 4 weeks of waiting, perhaps the postman swum over the ocean,
the 3R3 Mills MRA05 resistors from Partsconnexion arrived.
They replace the Dale NS-5 10R i had insert before.
Because i won´t disassemble the whole pcb again, i soldered them
on the stand´s from the upper side and so the solder point´s
doesn´t look so perfect...
The 2nd modification goes to the OVC-Shunt. Here i swap the installed 22R (~90mA) with the Dale NS-5 10R (~200mA).
Now let´s see and listen what will change...
It will take a few days till i could report back, because i am burning in some new tubes
in my Tube-I-zator output stage of my DAC to do some tube rolling.
After 4 weeks of waiting, perhaps the postman swum over the ocean,
the 3R3 Mills MRA05 resistors from Partsconnexion arrived.
They replace the Dale NS-5 10R i had insert before.
Because i won´t disassemble the whole pcb again, i soldered them
on the stand´s from the upper side and so the solder point´s
doesn´t look so perfect...
An externally hosted image should be here but it was not working when we last tested it.
The 2nd modification goes to the OVC-Shunt. Here i swap the installed 22R (~90mA) with the Dale NS-5 10R (~200mA).
An externally hosted image should be here but it was not working when we last tested it.
Now let´s see and listen what will change...
It will take a few days till i could report back, because i am burning in some new tubes
in my Tube-I-zator output stage of my DAC to do some tube rolling.