12-29-2020, 04:11 AM
Dan;
Never mind, I found the difference, the "Laurentian" has nine tubes, whereas the "Prescott" has eight. In this case it looks like the "Laurentian" has a tuned RF amplifier stage as it has two 6K7Ms, that a neon bulb. https://www.radiomuseum.org/r/deforest_l...7d932.html
Regards
Arran
Never mind, I found the difference, the "Laurentian" has nine tubes, whereas the "Prescott" has eight. In this case it looks like the "Laurentian" has a tuned RF amplifier stage as it has two 6K7Ms, that a neon bulb. https://www.radiomuseum.org/r/deforest_l...7d932.html
Regards
Arran