/diy/ - Do It Yourself

Quasars Sun Nov 3 11:58:20 2019 No.1709343 [View]
File: 202 KB, 2147x530, 688.jpg [View same] [iqdb] [saucenao] [google]

>>1709338
one more discovery i found this morning is that if I put the frequency counter at B1-2, I get ~688khz.
According to chroma standard, 688 is only derived from the subtraction of the two crystals:
>Only the low frequency components, 4.27MHz minus 3.58 MHz = 688 KHz, pass through the low pass filter. The down converter chroma signalat 688 KHz is supplied to delay line DL2 which maintains the proper timing relationship between thechroma and luminance signals
meaning the crystal would have to be at 4.27 for this to happen...
I have no idea whats going on now, maybe i need to look at this >>1708435
>>1708455 lol

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