Burn-In Process

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OTL, Output Transformerless Amplifier User Group.

Burn-In Process

Posted by Ralph (M) on September 29, 2021 at 10:58:09

In Reply to: Atma-Sphere MA-1 Burn-In Process posted by ACHiPo on September 28, 2021 at 17:51:49:

We think break-in has mostly to do with the filter capacitors used in the amp or preamp. As they form up, they become more effective over a wider range of frequencies and they seem to be more efficient. I say this because over about 6 months or so its possible to measure a slight increase in power supply voltage. I don't think power supply voltage is the whole story but it is an indication that the caps have improved their operation.

This break-in is very consistent and its been independently reported to us many times and with nearly the same descriptions of the changes they hear. I might be convinced that its expectation bias or something similar were it not for the fact that we hear it too and also measure changes.

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Follow Ups Full Thread

Topic - Atma-Sphere MA-1 Burn-In Process - ACHiPo 17:51:49 09/28/21 (14)

Burn-In Process - Ralph 10:58:09 09/29/21 (1)

RE: Burn-In Process - ACHiPo 11:16:23 09/29/21 (0)

RE: Atma-Sphere MA-1 Burn-In Process--72 hr update - ACHiPo 08:44:19 09/29/21 (11)

RE: Atma-Sphere MA-1 Burn-In Process--96 hr update - ACHiPo 06:49:31 09/30/21 (10)

RE: Atma-Sphere MA-1 Burn-In Process--120 hr update - ACHiPo 07:48:46 10/01/21 (9)

RE: Atma-Sphere MA-1 Burn-In Process--120 hr update - MRMB 15:15:33 10/01/21 (8)

RE: Atma-Sphere MA-1 Burn-In Process--120 hr update - ACHiPo 20:30:41 10/01/21 (7)

RE: Atma-Sphere MA-1 Burn-In Process--130 hr update - ACHiPo 08:22:38 10/04/21 (6)

Calling it Quits at ~150 hours - ACHiPo 11:01:24 10/05/21 (5)

RE: Calling it Quits at ~150 hours - ACHiPo 22:00:55 10/23/21 (4)

RE: Calling it Quits at ~150 hours - ACHiPo 08:40:43 10/24/21 (3)

RE: Calling it Quits at ~150 hours - Lew 09:41:47 11/10/21 (2)

RE: Calling it Quits at ~150 hours - ACHiPo 11:21:02 11/10/21 (1)

Tube inflation - Lew 10:31:20 11/14/21 (0)

Follow Ups

Burn-In Process - Ralph 10:58:09 09/29/21 (1)

RE: Burn-In Process - ACHiPo 11:16:23 09/29/21 (0)

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