Searching the amps archives, I know this question has been asked before but........ Apart from squeezing/expanding the coils of the input T network to obtain a satsifactory match, has anyone tried us
Maybe, but make two coils like the airspaced one, spend just a few minutes getting them squashed/stretched right and you don't need to touch it again for 20 years. Beats drilling holes anytime :-) St
I agree with Steve, the range of adjustment by squeezing the coils is entirely adequate, this is one of the best behaved input circuits I have ever experienced. I will be duplicating it on my YC-156
Thanks for the replies. I did use the squeeze/expand method to initially test the amp using the "cold" method of placing a resisitor equal to the calculated tube drive impedance across the cathode an
I had the problem with an 8877 on 2M. The input tuning drifted somehow and having only one adjustment wouldn't bring it back in line. I wanted to design a pi or pi-L network with two cap's to ground
Hi Jeff, Thanks for the info. A problem with a Pi or PI-L network is that the values of the L's become increasingly at 2 metres small whereas the values of the L's in a T network are somewhat more ma