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Old 27th April 2010, 12:51 PM   #201
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Quote:
Originally Posted by Valenca View Post
Hallo apex, My HV350 is almost done, I wonder with this amplifier adjust the BIAS. could you help me?
I will help you to adjust BIAS, can you post some pictures?
Regards
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Old 27th April 2010, 01:01 PM   #202
Valenca is offline Valenca  Brazil
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Apex, of course! so I finished soldering the components.
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Old 29th April 2010, 02:32 PM   #203
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Hi Apex,
Question 1: I can change 2n5551 for BC546 ?
Question 2: I can test the amplifier with only 2 IRFP240 and 2 IRFP9240 ?
I think so...

Thank´s !
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Old 29th April 2010, 02:51 PM   #204
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Quote:
Originally Posted by Valenca View Post
Hi Apex,
Question 1: I can change 2n5551 for BC546 ?
Question 2: I can test the amplifier with only 2 IRFP240 and 2 IRFP9240 ?
I think so...

Thank´s !
1: Yes, but reverse pin layout EBC>CBE
2: Yes, for test, but BIAS must be adjust again when add 2 pairs
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Old 29th April 2010, 06:18 PM   #205
Valenca is offline Valenca  Brazil
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Apex, The CLIP LED resistor layout is different from the resistor layout is 6.8k or 10K?

Thank you !
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Old 29th April 2010, 06:42 PM   #206
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Quote:
Originally Posted by Valenca View Post
Apex, The CLIP LED resistor layout is different from the resistor layout is 6.8k or 10K?

Thank you !
This resistor confirm LED current: Urail/R, use 10k any LED will work.
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Old 29th April 2010, 06:45 PM   #207
Valenca is offline Valenca  Brazil
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OK.
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Old 30th April 2010, 11:38 AM   #208
Valenca is offline Valenca  Brazil
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Apex Hi, I power on the HV350 and the sound is coming out distorted, I think it can be ceramic capacitors of transistors drivers 100PF ... What's happening? So I can send you the photos.
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Old 30th April 2010, 11:47 AM   #209
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Quote:
Originally Posted by Valenca View Post
Apex Hi, I power on the HV350 and the sound is coming out distorted, I think it can be ceramic capacitors of transistors drivers 100PF ... What's happening? So I can send you the photos.
I think bias is to low, use 10R resistors series in rail and set bias to get abot 2V on 10R resistor. Post pictures here.
Regards
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Old 30th April 2010, 11:55 AM   #210
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Apex, and power on the HV350 with 45v + / - PSU, can you be?
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