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A guide to building the Pass F4 amplifier.
A guide to building the Pass F4 amplifier.
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Old 10th August 2019, 10:24 AM   #1411
kecapmanis021 is offline kecapmanis021  Indonesia
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Quote:
Originally Posted by Shawnstium View Post
OKAY... I will just leave the Vishay AC series in and save the money. I am going to buy more mosfet to hopefully get their current draw closer together.
Afaik Vishay AC is inductive wirewound. IMO Panasonic ERG in standard BOM is a better choice, or Koa BPR metal plate resistor.

~Kecap
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Old 10th August 2019, 06:09 PM   #1412
gdglenn201 is offline gdglenn201  United States
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Would anyone mind making some suggestions on chassis wire gauges and types solid vs. stranded etc?
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Old 10th August 2019, 06:55 PM   #1413
SoundEros5 is offline SoundEros5
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Finally completed Pow Supply and F4 Boards. The less light up. However, I am reading .6 ohms across the .47 ohm resisters, and 0 VDC no matter how I turn the P1 variable resister. Any suggestions?
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Old 10th August 2019, 06:56 PM   #1414
SoundEros5 is offline SoundEros5
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The text should have read, "The leds light up."
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Old 10th August 2019, 07:02 PM   #1415
Zen Mod is online now Zen Mod  Serbia
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A guide to building the Pass F4 amplifier.
Quote:
Originally Posted by gdglenn201 View Post
Would anyone mind making some suggestions on chassis wire gauges and types solid vs. stranded etc?
all power lines 1.5 or 2,5 sq. mm , more the merrier ; nice stranded ......... solid is no-no there , not overly clever when dealing with pcbs
input signal - I'm using 0.2mm dia solid core , silvered copper


Quote:
Originally Posted by SoundEros5 View Post
Finally completed Pow Supply and F4 Boards. The less light up. However, I am reading .6 ohms across the .47 ohm resisters, and 0 VDC no matter how I turn the P1 variable resister. Any suggestions?
tricky to read anything sane cross R source , when same is in circuit , not taking in account possibility that you either have lousy DMM or lousy battery in same

regarding Iq - ( voltage readout across Rs) - you need two DVMs - one across output to observe output DC offset , and second across any Rs , to read voltage , thus Iq

pictures could help , also some measurement values , not even mentioning how important is to point us to your ref. schmtc
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Old 11th August 2019, 05:45 PM   #1416
SoundEros5 is offline SoundEros5
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I think I found the problem—at least I hope so.
I used a 22.1 ohm resister in R8 instead of the specified 22.1K
We'll see if that gives me a reading greater than 0 across the .47R source resisters.
Thank you, Zen Mod!
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Old 11th August 2019, 07:08 PM   #1417
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A guide to building the Pass F4 amplifier.
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