08-10-2013, 12:10 PM
(06-10-2013, 03:35 PM)Robert Darwent Wrote: Typically in those using a DF97, the VHF tuner head circuit broadly follows thosed based around an ECC85 or UCC85 found in many common 50s mains only table sets, but in miniature of course.
... well, as far as the mixer is concerned. yes. But there's no front-end RF amplifier/buffer - the aerial is connected directly to the mixer (at a cunningly chosen oscillator null point, so that there's no oscillator radiation from the aerial).
