Radio Road

Which tuner to get and getting the most from it. Thank God, for the radio!

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RE: Scott 310E tweaks?

Posted by Lee of Omaha on August 26, 2020 at 18:09:41:
I have a couple of 310Es, both of which need work at this point. The 310E is the only tuner I've heard a stereo image from. That is, not just separation, but an actual stereo image.

The 12DW7/7247 I think is out of production. It is half 12AU7 and half 12AX7. My suggestion is to use it until it fails, then engineer a solid state replacement, as the two 12DW7s just drive relays.

I would replace the 12AU7 with a better sounding tube, as it is in the audio signal path and the 12AU7 is not a good sounding tube. I'd recommend a 12AT7 or, if the transformer can handle the extra heater current, a 6CG7/6FQ7. You'll need to change the heater connections a little if you use the 6CG7/6FQ7 but other than that the pinout is the same as the 12AU7 and the gain is almost identical. The 12AT7's pinout and heater demands are identical to the 12AU7's, but the characteristics are different, so you'll have to reengineer the circuitry around the tube.