[Milsurplus] Ideas on Japanese circuit ?

[Ken]

What was that circuit called which used the same tube to act as BOTH an RF and an AF amplifier at the same time? It was popular in the 1930s.Do you suppose there is at least one of those included in this circuit?I'll bet there is.Ken W7EKBSent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone
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