Post by antigua on Nov 24, 2016 5:42:45 GMT -5
www.tvjones.com/paul-yandell-duo-tron-pickups.html
This set is sort of a mix between a TV Classic and a Super'Tron. The bobbins have rectangular cores, and are most likely the same bobbins used for the Super'trons. The screws are held in place with washers on the underside of the pickup. The blades are only secured by wax, they can be pried out of the top of the pickup. See pics below.
The major difference between the Duo'Trons and the Super'Trons is that TV Jones decided to wind this bridge especially hot. The DC resistance of 7.48k suggests they might have used 43AWG, but because the core is three screws and half a blade, it's more difficult to deduce. The inductance of of the bridge is 3.5H to the Super'trons's 3.3H, and the Duo'tron has a loaded peak that is about 300Hz lower, all despite having less permeable core material than the Super'tron. In other words, this is a deliberately hot bridge. Also notice in the bode plot below how far apart the bridge and neck plot lines are along the vertical axis.
The neck is a different story, the Duo'tron neck is a good deal brighter and lower output relative to the Super'tron. The Duo'tron neck actually appears to have a higher wind count, but the less substantial core of the Duo'tron brings it's inductance down. The Duo'tron neck pickup has a loaded resonant peak that is about 700 Hz higher than the Super'tron, but it's still 800Hz lower than a TV Classic, so overall, it still sounds like a hotter neck pickup.
Even though the neck and bridge pickup are far apart in terms of inductance, and have loaded peaks that are over 1.5kHz apart, they don't sound especially imbalanced to my ears.
TV Jones Duo-Tron Bridge
Resistance: 7.48k ohms
Inductance: 3.542H
Gauss: 375G rails, 325-375 screws
Unloaded: dV: 0.9dB f: 7.05kHz (black)
Loaded (200k & 470pF): dV: 0.0dB f: 2.96kHz (red)
TV Jones Duo-Tron Neck
Resistance: 4.17k ohms
Inductance: 1.851H
Gauss: 375G rails, 325-375 screws
Unloaded: dV:-0.6dB f: 10.4kHz (green)
Loaded (200k & 470pF): dV:-0.2dB f: 4.57kHz (gray)
Bode plot:
Pics:
This set is sort of a mix between a TV Classic and a Super'Tron. The bobbins have rectangular cores, and are most likely the same bobbins used for the Super'trons. The screws are held in place with washers on the underside of the pickup. The blades are only secured by wax, they can be pried out of the top of the pickup. See pics below.
The major difference between the Duo'Trons and the Super'Trons is that TV Jones decided to wind this bridge especially hot. The DC resistance of 7.48k suggests they might have used 43AWG, but because the core is three screws and half a blade, it's more difficult to deduce. The inductance of of the bridge is 3.5H to the Super'trons's 3.3H, and the Duo'tron has a loaded peak that is about 300Hz lower, all despite having less permeable core material than the Super'tron. In other words, this is a deliberately hot bridge. Also notice in the bode plot below how far apart the bridge and neck plot lines are along the vertical axis.
The neck is a different story, the Duo'tron neck is a good deal brighter and lower output relative to the Super'tron. The Duo'tron neck actually appears to have a higher wind count, but the less substantial core of the Duo'tron brings it's inductance down. The Duo'tron neck pickup has a loaded resonant peak that is about 700 Hz higher than the Super'tron, but it's still 800Hz lower than a TV Classic, so overall, it still sounds like a hotter neck pickup.
Even though the neck and bridge pickup are far apart in terms of inductance, and have loaded peaks that are over 1.5kHz apart, they don't sound especially imbalanced to my ears.
TV Jones Duo-Tron Bridge
Resistance: 7.48k ohms
Inductance: 3.542H
Gauss: 375G rails, 325-375 screws
Unloaded: dV: 0.9dB f: 7.05kHz (black)
Loaded (200k & 470pF): dV: 0.0dB f: 2.96kHz (red)
TV Jones Duo-Tron Neck
Resistance: 4.17k ohms
Inductance: 1.851H
Gauss: 375G rails, 325-375 screws
Unloaded: dV:-0.6dB f: 10.4kHz (green)
Loaded (200k & 470pF): dV:-0.2dB f: 4.57kHz (gray)
Bode plot:
Pics: