UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - JRC NRD515 HF Coms Receiver, 1982, FM on VFO?

Radio Wrangler · 7th Aug 2018, 11:03 pm

That would be most worthwhile.
Jeremy's plot of the stable version still shows a fair bit of noise peaking (the noise peak centres are a dead give-away to the loop bandwidth, and the number of dB of peak height suggest that the loop phase margin is a bit lower than I'd go for. But it's a difficult compromise. You really can't have everything you want - well not all at the same time.

David

7th Aug 2018, 11:03 pm	#56
Radio Wrangler Moderator Join Date: Mar 2012 Location: Fife, Scotland, UK. Posts: 22,858	Re: JRC NRD515 HF Coms Receiver, 1982, FM on VFO? That would be most worthwhile. Jeremy's plot of the stable version still shows a fair bit of noise peaking (the noise peak centres are a dead give-away to the loop bandwidth, and the number of dB of peak height suggest that the loop phase margin is a bit lower than I'd go for. But it's a difficult compromise. You really can't have everything you want - well not all at the same time. David __________________ Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done