Alright- so several times I've asked the same question and met with obfuscation. So I have to assume that you (Roger) have been unable to quantify the effect you are talking about.
Since you claim to have a circuit to compensate for this effect, the means to quantify the effect is apparently at your fingertips and this should be obvious to the casual observer.
Therefore I can only conclude that this 'effect' is non-existent. Otherwise you would have already told me how you quantify it. Kosst-amojan stated the exact same problem in a different way in the post just prior to this.
Since you claim to have a circuit to compensate for this effect, the means to quantify the effect is apparently at your fingertips and this should be obvious to the casual observer.
Therefore I can only conclude that this 'effect' is non-existent. Otherwise you would have already told me how you quantify it. Kosst-amojan stated the exact same problem in a different way in the post just prior to this.