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7104: Difference between revisions
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The 7104's amplifiers use a then novel scheme of "feed-beside" compensation ([http://www.google.com/patents/US4132958 US Pat. 4.132.958]) where instead of matching the HF response to the LF response, the LF response is determined by off-the-shelf operational amplifiers in parallel to the high-speed amplifiers, with a number of adjustable R-C time constants to compensate for thermal and other LF effects. The same technique is employed in the [[7A29]] amplifier plug-in. | The 7104's amplifiers use a then novel scheme of "feed-beside" compensation ([http://www.google.com/patents/US4132958 US Pat. 4.132.958]) where instead of matching the HF response to the LF response, the LF response is determined by off-the-shelf operational amplifiers in parallel to the high-speed amplifiers, with a number of adjustable R-C time constants to compensate for thermal and other LF effects. The same technique is employed in the [[7A29]] amplifier plug-in. | ||
==Power Supply== | ===Power Supply=== | ||
The 7104 uses a switch-mode power supply. | The 7104 uses a switch-mode power supply. | ||
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These transistors produce a 25 kHz waveform that is fed to the primary of T1310 ([[120-1183-00]]), whose secondaries provide the power for the rest of the scope. | These transistors produce a 25 kHz waveform that is fed to the primary of T1310 ([[120-1183-00]]), whose secondaries provide the power for the rest of the scope. | ||
Module A24 (also on schematic page <14>) contains the inverter control circuit and rectifiers for the secondaries of T1310. | Module A24 (also on schematic page <14>) contains the inverter control circuit and rectifiers for the secondaries of T1310. The inverter control circuit uses the [[155-0067-02]] inverter control IC, which is U1275. | ||
The inverter control circuit uses the [[155-0067-02]] inverter control IC, which is U1275. | |||
Module A25 (schematic page <15>) contains the low-voltage regulators. | Module A25 (schematic page <15>) contains the low-voltage regulators. | ||
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|- | |- | ||
! In 2022 Dollars | ! In 2022 Dollars | ||
|align=right| $ | |align=right| $53,100 | ||
|align=right| $ | |align=right| $62,600 | ||
|align=right| $ | |align=right| $69,800 | ||
|- | |- | ||
!rowspan=2| Mainframe with [[7A29]],<br />7A29 Opt. 04, [[7B15]], [[7B10]] | !rowspan=2| Mainframe with [[7A29]],<br />7A29 Opt. 04, [[7B15]], [[7B10]] | ||
| Line 119: | Line 118: | ||
|- | |- | ||
! In 2022 Dollars | ! In 2022 Dollars | ||
|align=right| $ | |align=right| $80,200 | ||
|align=right| $ | |align=right| $93,300 | ||
|align=right| $ | |align=right| $103,600 | ||
|- | |- | ||
|} | |} | ||