UBF80=17C8 Telefunken Diamond NOS
$ 7.99
8) UBF80=17C8 Telefunken Diamond NOS
Vfil=17V
The UBF80 features a variable μ amplifier pentode and a pair of diodes in screened envelope. This suggests use as a final IF amplifier with the diodes for signal and AGC rectification. The 100 mA heater requirement was to allow for operation in receivers without mains transformers, the so called universal sets as they could operate from DC mains as well as AC.
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