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DF92 1L4 Sharp Cutoff?

Jacob Roschy Martin Renz Ernst Erb Bernhard Nagel Dietmar Rudolph Eilert Menke 
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Forum » Valves / tubes - Semiconductors » VALVES/TUBES / SEMICONDUCTORS in RADIOMUSEUM » DF92 1L4 Sharp Cutoff?
Michael Watterson
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20.Feb.14 20:50

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I think this tube and equivalents is only common in 1950s Military gear, perhaps because it's sharp cut off and thus less AGC range than DF91 ( 1T4). It does "work" in a typical DK91 DF91 DAF91 DL92/DL91/DL94 AM Radio.