UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Marconi TF 995 B/5 weird waveform need schematic

frsimen · 5th Oct 2017, 8:54 pm

The TF995 series of signal generators use a low frequency oscillator followed by a frequency tripler stage then a number of frequency doublers to produce the final output. On the range you have shown only the tripler is used.

The waveform suggests that the alignment of the tripler stage is not quite correct. You are seeing a mix of the fundamental frequency and the wanted x3 frequency.

Paula

5th Oct 2017, 8:54 pm	#4
frsimen Heptode Join Date: Jan 2011 Location: Croydon, London, UK. Posts: 773	Re: Marconi TF 995 B/5 weird waveform need schematic The TF995 series of signal generators use a low frequency oscillator followed by a frequency tripler stage then a number of frequency doublers to produce the final output. On the range you have shown only the tripler is used. The waveform suggests that the alignment of the tripler stage is not quite correct. You are seeing a mix of the fundamental frequency and the wanted x3 frequency. Paula