Threshold 400 help - Page 5

P901 · 5th April 2010, 03:19 PM

Okay, for now a final followup.

Many thanks to the forum members for helping us through this
repair.
The amp is running fine, clear and powerful.

The photo shows the installation of an IXYS FRED rectifier, 1200v, 20amp
with the addition of Sprague .1uf Poly caps across the main power supply
capacitors

Thanks again for the support !

andrew

R-K Rønningstad · 5th April 2010, 07:32 PM

Hi, nice work

!
I have a 400A myself. Which IXYS FRED did you use?

best regds
RK

P901 · 5th April 2010, 08:16 PM

Good afternoon !

The rectifier we used was the IXYS VBE17-12NO7
If I recall it can handle 1200v at 19a.

Regards, andrew

R-K Rønningstad · 5th April 2010, 08:21 PM

Good afternoon to you, too, and thank you so much.
The datasheet can be found here PartDetail
Seems I have to purchase one IXYS VBE17-12NO7!

/RK

analog_sa · 5th April 2010, 08:54 PM

Quote:

Originally Posted by P901

Sprague .1uf Poly caps across the main power supply
capacitors

Something in the region of 10uF seems more appropriate for such large capacitors.

P901 · 5th April 2010, 09:00 PM

Thank you for that suggestion,
we shall probably run the unit as it
is for a bit and then try the 10uf.

Thanks again ! andrew

m2003br · 6th April 2010, 02:34 PM

Hi Andrew,

Congratulations for your succesful job!!!
The 400a deserves respect and a new chance to show how good it is!!!

Regards,
Marcos

P901 · 6th April 2010, 04:08 PM

Good afternoon Marco !

Thank you again for your hand drawn schematic !
Your drawing most certainly helped us understand the
layout of the unit.

Best regards, andrew

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5th April 2010, 07:32 PM	#42
R-K Rønningstad diyAudio Member Join Date: Jan 2006 Location: Oslo	Hi, nice work ! I have a 400A myself. Which IXYS FRED did you use? best regds RK

5th April 2010, 08:16 PM	#43
P901 diyAudio Member Join Date: Nov 2003 Location: Mansfield, CT	Good afternoon ! The rectifier we used was the IXYS VBE17-12NO7 If I recall it can handle 1200v at 19a. Regards, andrew

5th April 2010, 08:21 PM	#44
R-K Rønningstad diyAudio Member Join Date: Jan 2006 Location: Oslo	Good afternoon to you, too, and thank you so much. The datasheet can be found here PartDetail Seems I have to purchase one IXYS VBE17-12NO7! /RK

5th April 2010, 09:00 PM	#46
P901 diyAudio Member Join Date: Nov 2003 Location: Mansfield, CT	Thank you for that suggestion, we shall probably run the unit as it is for a bit and then try the 10uf. Thanks again ! andrew

6th April 2010, 02:34 PM	#47
m2003br diyAudio Member Join Date: Dec 2004 Location: Sao Paulo	Hi Andrew, Congratulations for your succesful job!!! The 400a deserves respect and a new chance to show how good it is!!! Regards, Marcos

6th April 2010, 04:08 PM	#48
P901 diyAudio Member Join Date: Nov 2003 Location: Mansfield, CT	Good afternoon Marco ! Thank you again for your hand drawn schematic ! Your drawing most certainly helped us understand the layout of the unit. Best regards, andrew

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