14-12-2017, 05:17 PM
(This post was last modified: 14-12-2017, 05:18 PM by Murphyv310.)
Hi.
I see another YouTube clip coming on.
This afternoon I changed the Anode bend detector in the 3 valve minimalistic superhet radio from an EF91 to an EF184. Wow what a big difference, I also replaced the 10k cathode resistor with a 10k pot in series with a 1k fixed resistor, this has allows me to set the bias point to give far better results on weak signals. Setting the pot to 9k plus the 1k is still amazing so the EF184 has to be the best valve I have tried in this position.
Caroline is coming through very well and that remember is with only one tuned IF stage. Manx radio on 1368 kHz is literally blasting in.
The above picture includes the EF184 (rear view) and changes to the wiring, incidentally an EF80 is worse than the EF91 in this stage.
I see another YouTube clip coming on.
This afternoon I changed the Anode bend detector in the 3 valve minimalistic superhet radio from an EF91 to an EF184. Wow what a big difference, I also replaced the 10k cathode resistor with a 10k pot in series with a 1k fixed resistor, this has allows me to set the bias point to give far better results on weak signals. Setting the pot to 9k plus the 1k is still amazing so the EF184 has to be the best valve I have tried in this position.
Caroline is coming through very well and that remember is with only one tuned IF stage. Manx radio on 1368 kHz is literally blasting in.
The above picture includes the EF184 (rear view) and changes to the wiring, incidentally an EF80 is worse than the EF91 in this stage.
