[R-390] IF Transformer Question and New Intro

[Jacques Fortin]

Hi John,
I cannot figure out how you managed to crack the slugs, but there is
effectively two of those in each T501, 502 and 503.
Z503 however, have only one.
T501, 502 and 503 top and bottom cores are usually peaked to different
frequencies during the IF alignment process.

73, Jacques, VE2JFE