1A1: Difference between revisions
No edit summary |
No edit summary |
||
| Line 2: | Line 2: | ||
title=Tektronix 1A1| | title=Tektronix 1A1| | ||
summary=50 MHz dual channel amplifier| | summary=50 MHz dual channel amplifier| | ||
image= | image=Tek 1A1 front.jpg | | ||
caption=1A1 front view| | caption=1A1 front view| | ||
introduced=1964 | | introduced=1964 | | ||
| Line 53: | Line 53: | ||
<gallery> | <gallery> | ||
Tek 1a1 early style.jpg|Early 1A1 | Tek 1a1 early style.jpg|Early 1A1 | ||
Tek 1A1 front.jpg | |||
dual_1A1_2.JPG|left: Nuvistor right: FET | dual_1A1_2.JPG|left: Nuvistor right: FET | ||
dual_1A1_1.JPG|left: Nuvistor right: FET | dual_1A1_1.JPG|left: Nuvistor right: FET | ||
Revision as of 10:54, 12 May 2019
Template:Plugin Sidebar 2 The Tektronix Type 1A1 plug-in for the 500-series scopes has two channels and a -3 dB point of 50 MHz at 50 mV/Div, 28 MHz at 5 mV/Div, and 2 Hz to 15 MHz at 500 μV/Div when channels 1 and 2 are cascaded.
There were three distinct versions of 1A1.
- The first version, from 1964 to 1966, has a Nuvistor front-end, and rotary input switches that were concentric with the BNC jacks. The knobs to invert the input channels are concentric with the vertical position knobs.
- The second version, from 1966 to ??? has fluted round V/cm knobs, and lever switches. The channel inversion control is an organ-style pull-push knob.
- The third model, from ??? until the end has four-sided V/cm knobs and a FET front-end.
Type 1A1 uses the "ALT SWEEP SLAVE PULSE" signal that is sent by scopes on pin 7 of the plug-in connector. In a Type 547 mainframe, this signal allows channel 1 to be displayed using the "A" timebase and channel 2 using the "B" timebase. This is useful, for example, to view the IF and AF of a radio receiver at the same time. Even after the front-end transitioned from Nuvistors to FETs, the output amplifier continued to use Nuvistors.
Type 1A1 has an External Trigger output for mainframes prior to the 547 that don't support plug-in triggering, and supplies the trigger system on pins 4/5 of the mainframe interface.
Types 1A1 and 1A2 were introduced together in 1964, the former for high-end use, the latter as an upgrade/replacement for Type CA. Both remained available until the 500-series scope line was discontinued.
The 1A1 is not a perfect superset of the 1A2; it supplies external trigger from channel 1 only.
The 1A1 may have evolved from the Type J, which never went into production.
Specifications
please add
Links
Pictures
-
Early 1A1
-
-
left: Nuvistor right: FET
-
left: Nuvistor right: FET
-
left: Nuvistor right: FET
-
Early 1A1 front end
-
Late 1A1 Output Amp
-
Early 1A1 Left View
-
Latest version of 1A1
-
556 with second version 1A1 in left bay and first version 1A1 in right bay.
-
Black 1A1
-
Latest version 1A1. Photo courtesy of Dan Wilson (Hideaway Studio).
