02-01-2022, 09:31 PM
Those 3D printed replacements look great. With the blue color they look exactly like modern Sprague 36D electrolytics!
Interested to see what they would look like made from metallic filament. Also nice to see the latest design is easily restuffable and really applicable to almost any radio.
As to your oscillator problem, I wonder if something is seriously off with the oscillator coil. From your measurements, the oscillator tuning range is so far off that it looks like you have high side oscillator mixing at the lowest freqs (+175 kc) and low side at the top of the band (-175 kc). That would explain why you receive signals at the low end and high end but get no reception in the middle.
What you may be hearing is the normal high side mixing at the low end and the image response at the high end of the band.
Interested to see what they would look like made from metallic filament. Also nice to see the latest design is easily restuffable and really applicable to almost any radio.
As to your oscillator problem, I wonder if something is seriously off with the oscillator coil. From your measurements, the oscillator tuning range is so far off that it looks like you have high side oscillator mixing at the lowest freqs (+175 kc) and low side at the top of the band (-175 kc). That would explain why you receive signals at the low end and high end but get no reception in the middle.
What you may be hearing is the normal high side mixing at the low end and the image response at the high end of the band.
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