[Amps] AL811, AL811H or AL572 mods to 6m

[Peter Voelpel]

What do you mean by "needed impedance transformation"?
The needed impedances transformation is always the same when other
parameters are not changed by the conversion to 6m.
Original anode capacitors usually have too high minimum capacity

73
Peter

-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
Behalf Of Bill Turner


Many people change the tune and load capacitors when converting one of
these to six meters, but that is totally unnecessary. Adding a simple
coil between anode and tank creates an L-network which does the needed
impedance transformation so you can use the original capacitors. This
technique is covered in any recent ARRL handbook.