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Old 5th Dec 2021, 6:41 pm   #43
HowardB's Avatar
Join Date: Dec 2017
Location: Staines-Upon-Thames, Surrey, UK.
Posts: 113
Default Re: Taylor 65B Sig Generator: Dodgy Waveform

Thanks 1950 - I took your advice and tried replacing V1 with a bridge rectifier.
The first photo shows the waveform at R1 with smoothing caps removed. Full-wave rectification.
213v and 133v each end of R1, so 8mA current.

The next photo shows the improved output;
top trace: 1 MHz modulated,
bottom trace: internal modulation.
The output is the best I've seen so far. Pretty happy with this.

I tried increasing the smoothing caps but didn't make a lot of difference to the modulated output.
The bridge is just tacked in at the moment.
I'll tidy it all up and probably leave it this way.
It should be fairly easy to remove the bridge and revert to the original if required.
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