UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - 6-gang FM stereo tuner heads

G0HZU_JMR · 20th Dec 2022, 7:22 pm

In case anyone is interested, I'm using the classic Fritz Dellsperger Smith chart program here:

https://www.fritz.dellsperger.net/smith.html

This program has been around for many years. The demo version is limited to just five circuit elements which is a bit of a shame.

I can get a slightly better response with the revised network below but the centre capacitor value value reduces to about 0.35pF.

I can't show a six element network with this smith chart program, but I can draw in the sixth element by hand on the chart. See the diagram below. I think this is the kind of thing David was referring to.

20th Dec 2022, 7:22 pm	#388
G0HZU_JMR Dekatron Join Date: Sep 2010 Location: Cheltenham, Gloucestershire, UK. Posts: 3,077	Re: 6-gang FM stereo tuner heads In case anyone is interested, I'm using the classic Fritz Dellsperger Smith chart program here: https://www.fritz.dellsperger.net/smith.html This program has been around for many years. The demo version is limited to just five circuit elements which is a bit of a shame. I can get a slightly better response with the revised network below but the centre capacitor value value reduces to about 0.35pF. I can't show a six element network with this smith chart program, but I can draw in the sixth element by hand on the chart. See the diagram below. I think this is the kind of thing David was referring to. Attached Thumbnails __________________ Regards, Jeremy G0HZU Last edited by G0HZU_JMR; 20th Dec 2022 at 7:41 pm.