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

trh01uk · 5th Oct 2017, 10:44 pm

I recall looking at the output of a TF995 (I can't remember the exact version) way back in 1978, when I worked at Pye Telecom and we still had these available in the development lab. I saw a similar messy waveform back then - and that was on a supposedly well maintained and calibrated instrument!

I checked it in the frequency domain too - and on some bands the output was a total mess. These generators were only ever used for on-channel work - never as an interference signal for intermod or selectivity measurements because of their horrible output.

Richard

5th Oct 2017, 10:44 pm	#5
trh01uk Octode Join Date: Nov 2010 Location: Ross-on-Wye, Herefordshire, UK. Posts: 1,652	Re: Marconi TF 995 B/5 weird waveform need schematic I recall looking at the output of a TF995 (I can't remember the exact version) way back in 1978, when I worked at Pye Telecom and we still had these available in the development lab. I saw a similar messy waveform back then - and that was on a supposedly well maintained and calibrated instrument! I checked it in the frequency domain too - and on some bands the output was a total mess. These generators were only ever used for on-channel work - never as an interference signal for intermod or selectivity measurements because of their horrible output. Richard