no need to put metal plate in between xformers
it can be counter-effective, if you forget to put it in sandwich between two rubber plates
you need just rubber there
I've posted appropriate sketch (from DEFiSIT thread)recently, but here it is in words,from top to bottom:
nut
spring washer
metal plate
rubber plate
Donut
rubber plate
Donut
rubber plate
bottom amp plate
and long bolt going through, from bottom plate to nut on top
as always, worth telling , do not attach anything else to top side of central bolt
you can double bottom rubber plate, considering that you got 2+2 with 2 Donuts
it can be counter-effective, if you forget to put it in sandwich between two rubber plates
you need just rubber there
I've posted appropriate sketch (from DEFiSIT thread)recently, but here it is in words,from top to bottom:
nut
spring washer
metal plate
rubber plate
Donut
rubber plate
Donut
rubber plate
bottom amp plate
and long bolt going through, from bottom plate to nut on top
as always, worth telling , do not attach anything else to top side of central bolt
you can double bottom rubber plate, considering that you got 2+2 with 2 Donuts
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G600: You're a step ahead of me. I am about 60 miles from them and called last week to see how they are doing. Their county is pretty tight with Covid stuff so they are basically shut down. The guy I talked to is ready for it to end.
Don
Don
One thing that the middle plate does with Antek transformers is that it keeps the bottom transformer centred, as the Antek transformers do not have their centres filled.
From the bottom, I have rubber, transformer, rubber, steel plate, rubber, transformer, rubber, steel plate.
Also with stacked transformers, the top of the upper transformer may be very close to the top plate of the amplifier case. Make sure that the bolt/nut does not touch the top plate!
From the bottom, I have rubber, transformer, rubber, steel plate, rubber, transformer, rubber, steel plate.
Also with stacked transformers, the top of the upper transformer may be very close to the top plate of the amplifier case. Make sure that the bolt/nut does not touch the top plate!
ZM, One more detail. Do you like to keep them stacked upright(un flipped) so wires come out different level? Or doesn't matter.
How are things in your neck of the woods with Covid.
R,
Don
How are things in your neck of the woods with Covid.
R,
Don
wires doesn't matter
Covid in Serbia - there is definite end of the tunnel, curve is flattened and declining, in fact
now things with curfew, expecting to see that eased soon, and after that I'm just looking are those damn planes start flying ...... to get packages and send some
not even mentioning that I care for plenty unknown and for some known ppl abroad, besides my Sis's both kids being in States ......
Covid in Serbia - there is definite end of the tunnel, curve is flattened and declining, in fact
now things with curfew, expecting to see that eased soon, and after that I'm just looking are those damn planes start flying ...... to get packages and send some
not even mentioning that I care for plenty unknown and for some known ppl abroad, besides my Sis's both kids being in States ......
...and, late as usual I will add my best hopes for ZM ....and for everyone else wherever you are based.
Hi,
Just have time to put the SissySIT into a case. Everything is fine and it does really make music. Thanks ZM.
I just measured the temperature, the SIT is 55 degree C and the MOSFET is 75 degree C (at the steel washer). Is it a bit high for the MOSFET?
I set the Iq to 1.6A and am afraid of setting higher due to the high temperature in MOSFET.
Thanks and good health to everyone.
Just have time to put the SissySIT into a case. Everything is fine and it does really make music. Thanks ZM.
I just measured the temperature, the SIT is 55 degree C and the MOSFET is 75 degree C (at the steel washer). Is it a bit high for the MOSFET?
I set the Iq to 1.6A and am afraid of setting higher due to the high temperature in MOSFET.
Thanks and good health to everyone.
glad to hear that you made it, and that you're satisfied 🙂
what you used for mosfet thermal interface ?
and how big is heatsink?
what you used for mosfet thermal interface ?
and how big is heatsink?
Hi,
I used the thin silicone thermal pad with thermal paste for the mosfet.
Is 75 degree C for the mosfet not good? What should be the ideal temperature?
I have not mount the 10mm face plate yet and will see whether the temperature will drop a bit after mounting.
Thanks.
I used the thin silicone thermal pad with thermal paste for the mosfet.
Is 75 degree C for the mosfet not good? What should be the ideal temperature?
I have not mount the 10mm face plate yet and will see whether the temperature will drop a bit after mounting.
Thanks.
silicone is not good enough
I did wrote several times - best to use Keratherm Red, (or that funny looking Alumina blocks) or plain old Mica + thermal paste
do it as soon is possible, you don't want Dodo mosfet
I did wrote several times - best to use Keratherm Red, (or that funny looking Alumina blocks) or plain old Mica + thermal paste
do it as soon is possible, you don't want Dodo mosfet
I discovered Keratherm recently, not a big fan because it's very soft and fragile.
It's bending under the Tokin.
And you can tear it easily while trying to perforate it.
It's bending under the Tokin.
And you can tear it easily while trying to perforate it.
I covered that too - I said several times that silicone sheet (btw. which Pras is sending for free, along with bushings, if you buy SIT from him) is perfect for SIT, as in SissySIT its sheer case size is taking care of peanut dissipation
T0247 cased mosfet is opposite case, it really starts sweating when you approach 35W++ dissipation, and you need to take care
T0247 cased mosfet is opposite case, it really starts sweating when you approach 35W++ dissipation, and you need to take care
