Well, I don't ride motorcycles, only bicycles and unicycles. So not full throttle.
The fans are Noctua NF-B9-1600 and run full speed with 12 V. Even at full speed they are very quiet. During the heatsink test, I found that about 9 V moved enough air to keep the temperature at about 41 C. The two resistors on the heatsink were dissipating about 200 W total.
I've built variable power supplies for the fans using LM317 outputting about 7 - 12 V. This will let me adjust the air flow depending on the ambient room temperature.
The fans are Noctua NF-B9-1600 and run full speed with 12 V. Even at full speed they are very quiet. During the heatsink test, I found that about 9 V moved enough air to keep the temperature at about 41 C. The two resistors on the heatsink were dissipating about 200 W total.
I've built variable power supplies for the fans using LM317 outputting about 7 - 12 V. This will let me adjust the air flow depending on the ambient room temperature.
at the end of this race track? Or will it be 
?
I will try...this amp
I tested the PSU with nothing hangin' on it. Put the light-bulb-tester in. Light turned off - pooh! Then without light-bulb-tester: I was short to a big boom!
I've got 73.8 V on the second cap. I made a CRC - filter with 2 x 47000µF caps.
The big cans / caps are rated at 80 V - so, I was close to the max.
But my mistake - I bought the wrong transformers.
230 V~ prim. / 2 x 25 V~ sec. / 500 W
sec. in series = 50 V~
50 V~ x 1.2 = 60 V
50 V~ x 1.3 = 65 V (this was what I've expected by the rule of thumb).
But the transformers put out a bit more than 2 x 25 V~ sec. (o.k. - unloaded).
I am searching.
And I will try to get the dumbness crown!
Greets
Dirk
I tested the PSU with nothing hangin' on it. Put the light-bulb-tester in. Light turned off - pooh! Then without light-bulb-tester: I was short to a big boom!
I've got 73.8 V on the second cap. I made a CRC - filter with 2 x 47000µF caps.
The big cans / caps are rated at 80 V - so, I was close to the max.
But my mistake - I bought the wrong transformers.
230 V~ prim. / 2 x 25 V~ sec. / 500 W
sec. in series = 50 V~
50 V~ x 1.2 = 60 V
50 V~ x 1.3 = 65 V (this was what I've expected by the rule of thumb).
But the transformers put out a bit more than 2 x 25 V~ sec. (o.k. - unloaded).
I am searching.
And I will try to get the dumbness crown!
Greets
Dirk
to Soundhappy
Hello Soundhappy,
the transformers are from the german company 'Strobelt'.
Strobelt - Ringkerntransformator Steuertransformator Trafogehause
They are only 40km away from where I live.
The trafos are in spec.. But I should have bought 2 x 22V~ sec. ?
Greets
Dirk
Hello Soundhappy,
the transformers are from the german company 'Strobelt'.
Strobelt - Ringkerntransformator Steuertransformator Trafogehause
They are only 40km away from where I live.
The trafos are in spec.. But I should have bought 2 x 22V~ sec. ?
Greets
Dirk
It's not one audio path transformer at the input ? For example Jensen or Cinemag etc.
to Itsmee #992
Hello Itsmee,
my heatsinks is 300 mm x 400 mm (per channel).
It is a 'cubicincher - modu - 8U - heatsink'.
The hockeypucks (IXYS-Mosfets) also should be able to handle the higher
voltage / amperes. I checked the datasheet with focus on FSOAB.
The optocoupler ? ... I am checking at the moment.
Greets
Dirk
Hello Itsmee,
my heatsinks is 300 mm x 400 mm (per channel).
It is a 'cubicincher - modu - 8U - heatsink'
.The hockeypucks (IXYS-Mosfets) also should be able to handle the higher
voltage / amperes. I checked the datasheet with focus on FSOAB.
The optocoupler ? ... I am checking at the moment.
Greets
Dirk
