UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - An all tubes FM tuner with permeability tuning device.

Osvaldo LW1DSE · 13th Mar 2022, 5:04 pm

This is the first attempt to make the IF strip. The tube is a dual pentode 6AR11 remote cutoff biased with 82ohm ad 10nf in cathode and about 140VDC at plate and screen. Independent pin for suppressor is grounded. The coil is about 6ųH tuned with about 30pF. 20T copper wire 0.3mm. Former is 15mm diameter. Anode load temporarily is a choke.

13th Mar 2022, 5:04 pm	#17
Osvaldo LW1DSE Tetrode Join Date: Jan 2022 Location: Barrio Garay, Almirante G. Brown, Buenos Aires, Argentina Posts: 76	Re: An all tubes FM tuner with permeability tuning device. This is the first attempt to make the IF strip. The tube is a dual pentode 6AR11 remote cutoff biased with 82ohm ad 10nf in cathode and about 140VDC at plate and screen. Independent pin for suppressor is grounded. The coil is about 6ųH tuned with about 30pF. 20T copper wire 0.3mm. Former is 15mm diameter. Anode load temporarily is a choke. Attached Thumbnails __________________ Enjoying high heel sandals, shoes or boots when I can.