Hifonics BXI 2610D - Page 3

Perry Babin · 14th June 2011, 07:18 PM

The instantaneous voltage on the gate (referenced to the source leg) determines whether they're on or off. When the voltage is above about 4v, they're fully on. When the voltage is below about 2v, they're fully off. The exact point where they're fully on or fully off varies by FET. These are approximate values. These voltages are not what you're reading with your multimeter. The meter averages the voltage. The instantaneous voltage would need to be viewed on a scope.

gizmo1961 · 14th June 2011, 07:23 PM

Thanks Perry. You really know a lot about what you are talking about. Also, I did not realize you were the founder of bcae1. I love that website. I use it for building speaker enclosures. Anyways I don't have a scope at the moment but I am going to put all the FETs back in the power supply and see how it does. I hate these cheap chinese FETs though. I know this thing is going to blow again... I am using IRFP064N purchased on Ebay. From china though... shall see if this thing lights up once more

gizmo1961 · 14th June 2011, 10:14 PM

OK I put all the fets in and the amp is running great. Pushing 2 12" soundstream subwoofers wired at 2 ohms in paralell. It isn't getting hot or anything and I have a 60 amp fuse inline. Used a 30 while testing amp on bench without audio. Now audio is amazing like it was before the psu went. Hopefully these chinese junk fets can hold up. Will know in time... for now-- JAM!!!

Dr Zeus · 15th June 2011, 01:39 PM

Quote:

Hopefully these chinese junk fets can hold up

lol.. and wow. Glad you got it running.
Perry, do you know if BD139/140 are stronger or better components than the originals?

gizmo1961 · 02:15 PM

Yeah me too. This amp produces some amazing bass response and the crosovers being 24db/octave are nice. Did you get your going Dr Zeus? Oh and the BD139 and BD140 are a little stronger than the originals at 1.5 amps collector current versus 1 amp collector current for the C3228 and A1275.

gizmo1961 · 16th June 2011, 03:36 AM

Got the BD 139 and BD 140 drivers in as well as the fets and amp has been slamming for two days now on a 2 ohm load. Fets and drivers stay ice cool as well as the outputs. Perfect!!!

I hope...

14th June 2011, 07:18 PM	#21
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	The instantaneous voltage on the gate (referenced to the source leg) determines whether they're on or off. When the voltage is above about 4v, they're fully on. When the voltage is below about 2v, they're fully off. The exact point where they're fully on or fully off varies by FET. These are approximate values. These voltages are not what you're reading with your multimeter. The meter averages the voltage. The instantaneous voltage would need to be viewed on a scope. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

15th June 2011, 01:59 PM	#25
gizmo1961 diyAudio Member Join Date: Jun 2011	Yeah me too. This amp produces some amazing bass response and the crosovers being 24db/octave are nice. Did you get your going Dr Zeus? Oh and the BD139 and BD140 are a little stronger than the originals at 1.5 amps collector current versus 1 amp collector current for the C3228 and A1275. Last edited by gizmo1961; 15th June 2011 at 02:15 PM.

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14th June 2011, 07:23 PM	#22
gizmo1961 diyAudio Member Join Date: Jun 2011	Thanks Perry. You really know a lot about what you are talking about. Also, I did not realize you were the founder of bcae1. I love that website. I use it for building speaker enclosures. Anyways I don't have a scope at the moment but I am going to put all the FETs back in the power supply and see how it does. I hate these cheap chinese FETs though. I know this thing is going to blow again... I am using IRFP064N purchased on Ebay. From china though... shall see if this thing lights up once more

14th June 2011, 10:14 PM	#23
gizmo1961 diyAudio Member Join Date: Jun 2011	OK I put all the fets in and the amp is running great. Pushing 2 12" soundstream subwoofers wired at 2 ohms in paralell. It isn't getting hot or anything and I have a 60 amp fuse inline. Used a 30 while testing amp on bench without audio. Now audio is amazing like it was before the psu went. Hopefully these chinese junk fets can hold up. Will know in time... for now-- JAM!!!

16th June 2011, 03:36 AM	#26
gizmo1961 diyAudio Member Join Date: Jun 2011	Got the BD 139 and BD 140 drivers in as well as the fets and amp has been slamming for two days now on a 2 ohm load. Fets and drivers stay ice cool as well as the outputs. Perfect!!! I hope...

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