UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Cathode follower line out

kalee20 · 10th Sep 2019, 9:13 am

4mA sounds a lot of current.

What signal voltages are involved? And what cable impedances (I presume mainly capacitive)? Knowing these it is possible to calculate signal currents, and then decide on DC current. Following that, it's just a matter of biasing the valve.

10th Sep 2019, 9:13 am	#7
kalee20 Dekatron Join Date: Feb 2007 Location: Lynton, N. Devon, UK. Posts: 7,088	Re: Cathode follower line out - best practice 4mA sounds a lot of current. What signal voltages are involved? And what cable impedances (I presume mainly capacitive)? Knowing these it is possible to calculate signal currents, and then decide on DC current. Following that, it's just a matter of biasing the valve.