Re: 7613 X-deflection issue
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Hi , I would expect to see the end voltages and at any point in between to be what is expected but dynamically the trigger signal in our case velocity modulated the X-sweep . Have you looked at the X-plates with a scope while this is being shown . I would expect at low frequencies with a sine wave signal the effect might not show at all .
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regards Brian(UK) On Thursday, 18 July 2024 at 14:33:45 BST, Loetroelli <tek@...> wrote:
Hi Brian, Thank you for the advice to consider a signal coupling from trigger circuits to X deflection. However, such an influence should be seen in the output voltage of the X amp, or not? I measured the X amp output voltage = voltage directly at the X CRT plates, during the repetitive staircase signal and the voltages at the beginning of all lines respectively the voltages at the end of all lines are the same. This should result in an exact correct X deflection, shouldn¡® t it? Perhaps my glasses are too dirty to see the fault. Ok, cleaning of the glasses didn¡®t really solve the problem. But I don¡®t give up. The 7000 series are, at least for me, a true piece of history, no matter wether the ?little¡° 7613 nor my 7104, 7834, 7904, 7844 jne. Regards Loetroelli |
Brian