09-26-2018, 07:49 PM
Route the replacement wire the same way as much as possible. The Nostalgia-Air schematic has the routing.
Do check the resistances of the IF's, they are wound with litz, sometimes strands break, resistance goes up and "Q" is lost. In that condition the IF will have a broad peak and poor coupling.
Seems RCA thought a lot about the IF system and suggest 'scope alignment, stagger tuning. Peak tuning will work fine as there is no "high fidelety" to AM any longer.
YMMV
Chas
Do check the resistances of the IF's, they are wound with litz, sometimes strands break, resistance goes up and "Q" is lost. In that condition the IF will have a broad peak and poor coupling.
Seems RCA thought a lot about the IF system and suggest 'scope alignment, stagger tuning. Peak tuning will work fine as there is no "high fidelety" to AM any longer.
YMMV
Chas
Pliny the younger
“nihil novum nihil varium nihil quod non semel spectasse sufficiat”
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