24-11-2017, 02:23 PM
Not really a minimalistic superhet any longer with 5 valves if you use one of those useless 6X5 things.
I still think there are ways to improve the Anode Bend Detector. For example use an EF91 or EF80. Perhaps an EF184 would work even better and the addition of some positive feedback on the stage would improve small signal performance. Getting the bias right is important as the valve is turned off and if the bias level is too high then weak stations disappear. it is quite hard to get "reaction" to work well on an anode bend detector as if the valve is biassed off it won't work then when a signal is present it takes off. Ok so there a challenge for a budding home constructor!!!
I still think there are ways to improve the Anode Bend Detector. For example use an EF91 or EF80. Perhaps an EF184 would work even better and the addition of some positive feedback on the stage would improve small signal performance. Getting the bias right is important as the valve is turned off and if the bias level is too high then weak stations disappear. it is quite hard to get "reaction" to work well on an anode bend detector as if the valve is biassed off it won't work then when a signal is present it takes off. Ok so there a challenge for a budding home constructor!!!
