Good stuff....I also have a home-made decades old FM tuner with ECC88´s, but attempted to change the gang condenser towards BB104 Varactor diodes, but it didn´t work out. Over the decades, here in Europe the FM band is quite conjested requiring tighter channel separation than the old stereo 150Khz bandwidth. In some ways I got around this by using a rotatable 12 array Yagi directional antenna with good rear rejection. Still. with ajacent stations everywhere from several countries, the lock-in of the Auto Freq Control (AFC) and a good filter rejecting the pilot 19Khz/38Khz sidebands is necessary. Getting better than 1uV sensitivity for full limiting with tubes, is quite a challenge.
Fortunately, the move towards digital broadcasting has currently has stalled, maybe shelved, which would have rendered much of this old stuff obsolete.
Keep at it !
BB
Fortunately, the move towards digital broadcasting has currently has stalled, maybe shelved, which would have rendered much of this old stuff obsolete.
Keep at it !
BB
This looks like a cool project! Are all the ICs still available from reputable venders? I struck out at Mouser.
Nop I got the 1980's stuff (SAA1057 and TCA4500A BA809 IF coils and the tubes) on ebay - all worked fine. Just a matter of looking at the photo's and check that they look NOS - just like valves. Good thing with ebay - if its bust send it back.
I've put a link to the project so just posting in one place as diyaudio is more with amps.
https://funwithtubes.groups.io/g/main/message/70828
Great thing to try a FM or AM or SW receiver. Start with a bit of copper clad board and experiment.
I've put a link to the project so just posting in one place as diyaudio is more with amps.
https://funwithtubes.groups.io/g/main/message/70828
Great thing to try a FM or AM or SW receiver. Start with a bit of copper clad board and experiment.