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Folsom DIY7297 Amp & Antipole PSU
Folsom DIY7297 Amp & Antipole PSU
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Old 14th October 2017, 08:57 AM   #111
KaffiMann is offline KaffiMann  Norway
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I ordered all the parts a while back, and seeing that some where not immediately available I just thought "what the heck, there's too much to do anyway." So I'll get them beginning of next year. It also gives me some time to get the rest of the signal chain prepared, looking around at op amps for a pre stage just because I want to. Speakers have not arrived yet either. Will post when there's any progress on the amp.

Edit:
How are they on 4ohm loads?

Last edited by KaffiMann; 14th October 2017 at 09:06 AM.
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Old 14th October 2017, 04:32 PM   #112
Destroyer OS is offline Destroyer OS  United States
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Folsom DIY7297 Amp & Antipole PSU
4ohm is just fine
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Old 15th October 2017, 09:30 AM   #113
lucylu is offline lucylu  England
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I have 4 nichicon kg 10,000 50v nice and new would these work ok in the psu instead
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Old 15th October 2017, 06:54 PM   #114
Destroyer OS is offline Destroyer OS  United States
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That would be fine
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Old 16th October 2017, 02:20 PM   #115
pistollero is offline pistollero  Portugal
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Hello i want to test only the antipole... i have the bleed resistor 10k...
How many volts should i read?
Is necessary some load dummy or i just measure the output on pcb?

Another thing about the input bypass caps. Are really necessary?
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Old 16th October 2017, 04:36 PM   #116
Destroyer OS is offline Destroyer OS  United States
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Folsom DIY7297 Amp & Antipole PSU
You can test the antipole with no load. Just make sure that the voltage on it is down to nothing when you connect it to amplifier.

Voltage depends on the transformer used. If you have 15-16v transformer you should get 21-24v range.

Input bypass capacitors on the bottom of the board? No, not required.
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Old 1st November 2017, 03:46 PM   #117
pistollero is offline pistollero  Portugal
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Hello Jeremy i have amp running. Everything is ok but i ear a lot of noise floor on my speakers like shxeeeeee behind the music..and at lower volumes..
Is it normal?
I have other amps and i dont ear it so louder.
The sound is great
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Old 1st November 2017, 03:55 PM   #118
pistollero is offline pistollero  Portugal
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some pics im using ft3 teflon on input caps
Attached Images
File Type: jpg 20171101_152531.jpg (701.9 KB, 166 views)
File Type: jpg 20171101_152556.jpg (699.0 KB, 167 views)
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Old 1st November 2017, 05:26 PM   #119
Destroyer OS is offline Destroyer OS  United States
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You should hear nothing more than a small whisper when your ear is right at the speaker.

If you can hear it where you are sitting, it's excessive.
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Old 2nd November 2017, 08:07 AM   #120
pistollero is offline pistollero  Portugal
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Quote:
Originally Posted by Destroyer OS View Post
You should hear nothing more than a small whisper when your ear is right at the speaker.

If you can hear it where you are sitting, it's excessive.
It is working good now..
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