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push/pull tractor

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push/pull tractor

A printer tractor that can be switched from pushing paper onto the platen to pulling it from the platen. Single-sheet continuous forms can be pushed, but most multipart forms and labels must be pulled to prevent jamming.
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References in periodicals archive
The transistors are internally input-matched, can be used single-ended or in a push-pull configuration, and are characterized for 30 V to 50 V.
So even a push-pull configuration would only be implemented if it was really warranted, i.e.
It is also available as an auger scraper arrangement, which gives the machine self-loading capability, or in a push-pull configuration designed for two 637s to assist each other when loading.
In the horizontal plane, one space facility has coupled four shakers to a single slip plate in a push-pull configuration; that is, two shakers on either side of the table.
There are two methods to realize the push-pull configuration. Another push-pull configuration is shown in Figure 9, where a balun is used.
A twin-transistor device, the NES1720P-140 is partially matched and its two sides can be combined externally in either a balanced or push-pull configuration. Price: $215 (100).
Partially matched, the device's two sides can be combined externally in either a balanced or push-pull configuration. The GaAs MESFET chips feature tungsten silicide gates for high reliability, silicon dioxide and nitride passivation for surface stability, and plated heat sinks for reduced thermal resistance.
The model MGFS52V2122 160 W power transistor has a push-pull configuration and is intended for use in W-CDMA base stations operating in the 2.1 to 2.2 0Hz frequency range.
Operating from a +5 V DC supply in a push-pull configuration, the new IC amplifier extends the linear efficiency advantages of the existing AH1 device to higher power levels and delivers +17 dBm of linear output power with an output third-order intercept point ([OIP.sub.3]) of greater than 50 dBm.
Impedance measurements on high power RF transistors are always a problem because of the very low values and lead widths and because the devices may be in a push-pull configuration. Calibration kits to measure wide or balanced microstrip lines are difficult to build and provide poor accuracy.
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