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Homebrew Equipment A place to show, design and discuss the weird and wonderful electronic creations from the hands of individual members. |
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13th Feb 2015, 9:45 am | #1 |
Tetrode
Join Date: Oct 2003
Location: Zagreb, Croatia
Posts: 87
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Wobbulator Modification
I have Grundig WS-4 wobbulator, who originally has 4-range marker generator.
Ranges are: - 4kHz AM modulated - 1,5 MHz - 5 MHz - and ext. quartz 2-12 MHz input I would like to have fixed markers 150 kHz both sides of the IF response curve, when I’ve making IF valve radio aligning. I’ve no idea what those markers served (1.5 and 5 MHz) probably for old CRT TV-s, but I doubt I will ever use them. Is it possible to modify one of those marker circuit to lower them to the 150 kHz ? Here is a block and line diagram. Markers oscillator circuits are red rounded. Any ideas-comments are welcomed. |