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{{Oscilloscope Sidebar|
{{Oscilloscope Sidebar  
title=Tektronix 7904|
|manufacturer=Tektronix
image=Tek-7904-front.jpg |
|series=7000-series scopes
caption=Tektronix 7904 (with [[7A19]], [[7A11]], [[7D11]], [[7B85]]) |
|model= 7904
introduced=1971 |
|designers=Val Garuts;Thor Hallen;John McCormick;Les Larson;Bill DeVey;Bill Peek;Hans Springer;Joe Burger;Joel Swanno;Ken Hawken
discontinued=1990 |
|image=Tek-7904-front.jpg
summary=500 MHz non-storage mainframe|
|caption=Tektronix 7904 (with [[7A19]], [[7A11]], [[7D11]], [[7B85]])  
manuals=
|introduced=1971  
|discontinued=1990  
|summary=500 MHz non-storage mainframe
|manuals=
* [http://bama.edebris.com/download/tek/7904/Tektronix_7904_Service_May1983.pdf Tektronix 7904 Manual (PDF)]
* [http://bama.edebris.com/download/tek/7904/Tektronix_7904_Service_May1983.pdf Tektronix 7904 Manual (PDF)]
* [http://www.ko4bb.com/getsimple/index.php?id=manuals&dir=Tektronix/Tektronix_-_7904A Tektronix 7904A Manual (DjVu)]
* [http://www.ko4bb.com/getsimple/index.php?id=manuals&dir=Tektronix/Tektronix_-_7904A Tektronix 7904A Manual (DjVu)]
Line 20: Line 23:
* [http://hakanh.com/dl/docs/kitinstructions/050-0730-06.pdf 050-0730-06 (1980) B Trigger selector circuit board replacement]
* [http://hakanh.com/dl/docs/kitinstructions/050-0730-06.pdf 050-0730-06 (1980) B Trigger selector circuit board replacement]
* [http://hakanh.com/dl/docs/kitinstructions/050-0763-03.pdf 050-0763-03 (1981) Vertical interface circuit board replacement]
* [http://hakanh.com/dl/docs/kitinstructions/050-0763-03.pdf 050-0763-03 (1981) Vertical interface circuit board replacement]
* [http://hakanh.com/dl/docs/kitinstructions/050-1014-00.pdf 050-1014-00 (1980) Vertical output IC replacement (155-0064-00)]
* [http://hakanh.com/dl/docs/kitinstructions/050-1014-00.pdf 050-1014-00 (1980) Vertical output IC replacement] ([[155-0064-00]])
* [http://hakanh.com/dl/docs/kitinstructions/050-1723-01.pdf 050-1723-01 (1983) P31 CRT replacement]
* [http://hakanh.com/dl/docs/kitinstructions/050-1723-01.pdf 050-1723-01 (1983) P31 CRT replacement]
* [http://hakanh.com/dl/docs/custommods/7904mod721K.pdf Custom Mod 721K (1972) Single shot readout and/or grat illumination]
* [http://hakanh.com/dl/docs/custommods/7904mod721K.pdf Custom Mod 721K (1972) Single shot readout and/or grat illumination]
</small>
</small>
}}
}}
The '''Tektronix 7904''' is a 500 MHz, non-storage 7000-series oscilloscope mainframe with four bays. It accepts two [[7000-series_plug-ins#Vertical plug-ins|7000-series vertical plug-ins]] and two [[7000-series_plug-ins#Horizontal plug-ins|7000-series horizontal plug-ins]]. It was introduced in late 1971/early 1972 (Note 1). The successor model 7904A was introduced in 1984. There is also a rack-mount version, the [[R7903]], albeit with only one horizontal bay.
The '''Tektronix 7904''' is a 500 MHz, non-storage 7000-series oscilloscope mainframe with four bays.
It accepts two [[7000-series_plug-ins#Vertical plug-ins|7000-series vertical plug-ins]] and two [[7000-series_plug-ins#Horizontal plug-ins|7000-series horizontal plug-ins]].
It was introduced in late 1971/early 1972 (Note 1).
The successor model 7904A was introduced in 1984.
There is also a rack-mount version, the [[R7903]], albeit with only one horizontal bay.


Performance is largely determined by the plug-ins. The [[7A19]] vertical amplifier and [[7B92]] time base were introduced along with the 7904 to match the 500 MHz system bandwidth.   
Performance is largely determined by the plug-ins.
The [[7A19]] vertical amplifier and [[7B92]] time base were introduced along with the 7904 to match the 500 MHz system bandwidth.   
 
Design Staff of 7904 Project (from July 1971 Tekscope):
<blockquote>[[Val Garuts]] was project manager and developed the large signal amplifier circuit used in the horizontal and Z-axis amplifiers. [[Thor Hallen]] did the [[7A19]] plug-in and the vertical amplifier, and [[John McCormick]] the horizontal. The trigger and time base ([[7B92]] plug-in) were done by [[Les Larson]] and [[Bill DeVey]]. [[Bill Peek]] worked on the Z-axis amplifier and auto-focus, with [[Hans Springer]] doing the mainframe interface and channel switching. [[Joe Burger]]'s work on the power supply, coupled with [[Joel Swanno]]’s efforts in mechanical design, reduced the weight to only 30 pounds. [[Ken Hawken]] did the fine job on the CRT. </blockquote>


{{BeginSpecs}}
{{BeginSpecs}}
Line 46: Line 57:
The 7904A re-implements the vertical amplifier using Hypcon-packaged amplifier chips designed for the [[7104]], such as the [[155-0178-00]].
The 7904A re-implements the vertical amplifier using Hypcon-packaged amplifier chips designed for the [[7104]], such as the [[155-0178-00]].


The 7904 had an elaborate 5-decade built-in calibrator with variable rate that was dropped from the 7904A. In the 7904A, The Control Illumination switch moved to the rear panel, and the [[7000 series readout system|readout system]] gained a pulsed mode in which it is synchronized with the sweep instead of interrupting the display at random times. This pulsed mode is not compatible with all time base plug-ins (see manual p. 1-12).
The 7904 had an elaborate 5-decade built-in calibrator with variable rate that was dropped from the 7904A. The [[7904 remote control connector|rear remote control connector]] unique to the 7904 was dropped as well.
In the 7904A, The Control Illumination switch moved to the rear panel, and the [[7000 series readout system|readout system]]
gained a pulsed mode in which it is synchronized with the sweep instead of interrupting the display at random times.
This pulsed mode is not compatible with all time base plug-ins (see manual p. 1-12).


===Options===
===Options===
Line 58: Line 72:
==Operation==
==Operation==


The 7904 has a many modes of operation. One mode is called "Independent-Pairs Display" in the manual, where the input to the left vertical plug-in is displayed using the B horizontal time-base plug-in, and the input to the right vertical plug-in is displayed using the A horizontal time-base plug-in. This resembles the trace-slaving "ALT" mode that is produced by an [[1A4]] in a [[547]]. Many other modes are available. It is possible to put vertical plug-ins in the horizontal slots for X-Y operation. It is even possible to put a horizontal plug-in in one of the vertical slots to produce a raster scan.   
The 7904 has many modes of operation.
One mode is called "Independent-Pairs Display" in the manual, where the input to the left vertical plug-in is displayed using the B horizontal time-base plug-in,
and the input to the right vertical plug-in is displayed using the A horizontal time-base plug-in.
This resembles the trace-slaving "ALT" mode that is produced by an [[1A4]] in a [[547]]. Many other modes are available.
It is possible to put vertical plug-ins in the horizontal slots for X-Y operation.
It is even possible to put a horizontal plug-in in one of the vertical slots to produce a raster scan.   


A special plug-in, the [[7A21N]], provides direct access to the deflection plates up to 1 GHz at an uncalibrated sensitivity of 4 V/Div. This plugin requires modifications to the mainframe to bypass the Y output amplifier (thus disabling readout and the other vertical plugin bay).
A special plug-in, the [[7A21N]], provides direct access to the deflection plates up to 1 GHz at an uncalibrated sensitivity of 4 V/Div.
This plugin requires modifications to the mainframe to bypass the Y output amplifier (thus disabling readout and the other vertical plugin bay).
 
A rear-panel [[7904 remote control connector| remote control connector]] has connections for single-sweep ready lamps, a reset button, and readout control.


==Internals==
==Internals==
The 7904 uses a switch-mode power supply and has no fan. It incorporates a 65 ns Y delay line. This delay is too short for some older time bases such as [[7B53]] to display the trigger event.
The 7904 uses a switch-mode power supply and has no fan. It incorporates a 65 ns Y delay line.
This delay is too short for some older time bases such as [[7B53]] to display the trigger event.


[[Thor Hallen]] designed the main vertical amplifier and the [[7A19]] plugin (Note 1). It used bridged T coils and the "[[Transit frequency doubler|f<sub>t</sub> doubler]]" circuit patented by [[Carl Battjes]] to achieve its bandwidth.
[[Thor Hallen]] designed the main vertical amplifier and the [[7A19]] plugin (Note 1).
It used bridged T coils and the "[[ft doubler|f<sub>t</sub> doubler]]" circuit patented by [[Carl Battjes]] to achieve its bandwidth.


The 7904 makes extensive use of custom integrated circuits and hybrid circuits, inter alia, the [[155-0064-00]] 470-ps output amplifier, [[155-0022-00]] analog multiplexer for channel switching, [[155-0059-00]] HF amplifier, [[155-0095-01]] and [[155-0095-03]] differential HF amplifiers, and [[155-0067-02]] SMPS controller.   
The 7904 makes extensive use of custom integrated circuits and hybrid circuits, inter alia, the [[155-0064-00]] 470-ps output amplifier,
[[155-0022-00]] analog multiplexer for channel switching, [[155-0059-00]] HF amplifier,
[[155-0095-01]] and [[155-0095-03]] differential HF amplifiers, and [[155-0067-02]] SMPS controller.   


The 7904A includes [[155-0173-05]], [[155-0175-05]] and [[155-0178-05]] amplifiers.
The 7904A includes [[155-0173-05]], [[155-0175-05]] and [[155-0178-05]] amplifiers.


The signal path is completely differential and the internal signal wiring is 50 Ω coax. The CRT ([[154-0644-05]]) has [[distributed vertical deflection plates]].
The signal path is completely differential and the internal signal wiring is 50 Ω coax.
The CRT ([[154-0644-05]]) has [[distributed vertical deflection plates]].


==Prices==
==Prices==
Line 100: Line 127:
|align=right| $12,750
|align=right| $12,750
|-
|-
! 2016 value
! 2019 value
|align=right| $16,500
|align=right| $17,640
|align=right| $17,100
|align=right| $18,320
|align=right| $18,000
|align=right| $19,330
|align=right| $20,100
|align=right| $21,550
|align=right| $23,100
|align=right| $24,800
|-
|-
!rowspan=2| Mainframe with [[7A19]],<br />7A19 Opt. 04, [[7B92]]
!rowspan=2| Mainframe with [[7A19]],<br />7A19 Opt. 04, [[7B92]]
Line 115: Line 142:
|align=right| $24,190
|align=right| $24,190
|-
|-
! 2016 value
! 2019 value
|align=right| $31,200
|align=right| $33,450
|align=right| $32,400
|align=right| $34,690
|align=right| $34,600
|align=right| $37,070
|align=right| $39,800
|align=right| $42,630
|align=right| $43,900
|align=right| $47,050
|}
|}


==Links==
==Links==


* [[Media:Tekscope 1971 V3 N4 Jul 1971.pdf | Tekscope Vol. 3 No. 4, Jul 1971]]
* [[Media:A subnanosecond realtime oscilloscope garuts hallen.pdf|A Subnanosecond Realtime Oscilloscope]], [[Media:Tekscope 1971 V3 N4 Jul 1971.pdf | Tekscope Vol.3 No.4, July 1971]]
* [https://lazyelectrons.wordpress.com/2018/11/24/tektronix-7904-oscilloscope-power-supply-repair/ 7904 Repair with Video]
* [http://amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_mainframe/7904.htm Tek 7904] / [http://amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_mainframe/7904A.htm 7904A] @ amplifier.cd
* [http://amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_mainframe/7904.htm Tek 7904] / [http://amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_mainframe/7904A.htm 7904A] @ amplifier.cd
* [https://www.circuitsathome.com/measurements/repairing-front-panel-buttons-of-tektronix-7904-oscilloscope Repairing front panel buttons of Tektronix 7904 oscilloscope]
* [http://www.barrytech.com/tektronix/tek7000/tek7904.html Tek 7904] / [http://www.barrytech.com/tektronix/tek7000/tek7904a.html 7904A] @ barrytech.com
* [http://www.barrytech.com/tektronix/tek7000/tek7904.html Tek 7904] / [http://www.barrytech.com/tektronix/tek7000/tek7904a.html 7904A] @ barrytech.com
* [https://www.circuitsathome.com/measurements/repairing-front-panel-buttons-of-tektronix-7904-oscilloscope Repairing front panel buttons of Tektronix 7904 oscilloscope]


==Notes==
==Notes==
# See [[7A11]] and [[John Addis]], ''Good Engineering and Fast Vertical Amplifiers'', in Jim Williams (Ed.), ''Analog Circuit Design: Art, Science and Personalities'' (1991), p.114, and [http://w140.com/tektronix_new_products_1972.pdf Tektronix New Products 1972] brochure.
# See [[7A11]] and [[John Addis]], ''Good Engineering and Fast Vertical Amplifiers'', in [[Jim Williams]] (Ed.), ''Analog Circuit Design: Art, Science and Personalities'' (1991), p.114, and [http://w140.com/tektronix_new_products_1972.pdf Tektronix New Products 1972] brochure.
   
   
==Pictures==
==Pictures==
Line 137: Line 165:
===7904 non-A===
===7904 non-A===
<gallery>
<gallery>
File:Tek-7904-front.jpg | 7904  (non-A) front
Tek-7904-front.jpg | 7904  (non-A) front
File:7904-left.jpg | Left side. Left top: Vertical amplifier; left bottom: switch-mode power supply; right center: delay line; right bottom: plug-in bays
Tek 7904 rear.jpg | 7904 rear
File:7904-right.jpg | Right side.  Top left: calibrator; bottom left: plug-in bays; top center: [[7000 series readout system|readout board]];  top right: Z amplifier  
7904-left.jpg | Left side. Left top: Vertical amplifier; left bottom: switch-mode power supply; right center: delay line; right bottom: plug-in bays
File:7904-right-front.jpg | Right side detail. Left: calibrator; right: readout.
7904-right.jpg | Right side.  Top left: calibrator; bottom left: plug-in bays; top center: [[7000 series readout system|readout board]];  top right: Z amplifier  
File:7904 interface 1.jpg|Plug-in backplane board front (left trigger selector piggyback board removed)
7904-right-front.jpg | Right side detail. Left: calibrator; right: readout.
File:Tek7904-trig-selector.jpg | B Trigger selector piggyback board (A6)
7904 interface 1.jpg|Plug-in backplane board front (left trigger selector piggyback board removed)
File:Tek7904-vertical-interface.jpg | Vertical interface piggyback board (A7).  The two [[155-0095-03]] amplifiers (large metal cans) are used to select the signal from one vertical plug-in bay, and drive the delay line.
Tek7904-trig-selector.jpg | B Trigger selector piggyback board (A6)
File:7904 interface 2.jpg|Plug-in backplane board rear
Tek7904-vertical-interface.jpg | Vertical interface piggyback board (A7).  The two [[155-0095-03]] amplifiers (large metal cans) are used to select the signal from one vertical plug-in bay, and drive the delay line.
File:Tek7904-backplane-bottom.jpg | Backplane board sandwich seen from below
7904 interface 2.jpg|Plug-in backplane board rear
File:7904-x-amp.jpg | Horizontal (X) amplifier board
Tek7904-backplane-bottom.jpg | Backplane board sandwich seen from below
File:7904-y-amp.jpg | Vertical (Y) amplifier board
7904-x-amp.jpg | Horizontal (X) amplifier board
File:7904-z-amp.jpg | Z amplifier board
7904-y-amp.jpg | Vertical (Y) amplifier board
File:7904-controls.jpg | front-panel controls
7904-z-amp.jpg | Z amplifier board
File:7904_block.gif|7904 block diagram
7904-controls.jpg | front-panel controls
File:Tek7904-7a19-7b92a-1010mhz-hfsync.jpg | A 7B92A (B098xxx) displaying a 1.01 GHz sine in HF Sync mode ([[7904]] mainframe, [[7A19]] amplifier).
7904_block.gif|7904 block diagram
Tek7904-7a19-7b92a-1010mhz-hfsync.jpg | A 7B92A (B098xxx) displaying a 1.01 GHz sine in HF Sync mode ([[7904]] mainframe, [[7A19]] amplifier).


</gallery>
</gallery>
====Power Supply====
====Power Supply====
<gallery>
<gallery>
File:7904-psu-internal.jpg    | 7904 switchmode power supply, covers removed
7904-psu-internal.jpg    | 7904 switchmode power supply, covers removed
File:7904-psu-right.jpg        | View from right (as seen from front of instrument)
7904-psu-right.jpg        | View from right (as seen from front of instrument)
File:7904-psu-primary.jpg      | Primary side circuit board
7904-psu-primary.jpg      | Primary side circuit board
File:7904-psu-primary-caps.jpg | Primary side capacitors
7904-psu-primary-caps.jpg | Primary side capacitors
File:7904-psu-transformer.jpg  | Detail view of transformer from the side
7904-psu-transformer.jpg  | Detail view of transformer from the side
File:7904-psu-rectifier.jpg    | Secondary side rectifier board
7904-psu-rectifier.jpg    | Secondary side rectifier board
File:7904-psu-regulator.jpg    | Secondary side post-regulator
7904-psu-regulator.jpg    | Secondary side post-regulator
</gallery>
</gallery>


Line 168: Line 197:
<gallery>
<gallery>
7904a-front.jpg |7904A
7904a-front.jpg |7904A
7904A_rear.jpg |7904A Rear
7904A_top1.jpg |7904A Top with Horizontal Amplifier at top right
7904A_right1.jpg |7904A Right with Z-axis on top right and 2nd Gen. Readout board at bottom right
7904A_left1.jpg |7904A Left with Vertical Amplifier (top) and Vertical switch board (bottom)
7904A_topleft1.jpg |7904A Topleft
7904A_left_closeup.jpg |7904A Closeup of Vertical amplifier
7904a lvps1.png|7904A Low-voltage Power Supply Schematic
7904a lvps1.png|7904A Low-voltage Power Supply Schematic
7904a-h-v.jpg | 7904A Horizontal and vertical amplifiers
7904a-h-v.jpg | 7904A Horizontal and vertical amplifiers
</gallery>
</gallery>


{{Custom ICs|7904}}
{{Custom ICs|7904A}}
{{Custom ICs|7000 series readout system}}


[[Category:7000 series non-storage mainframes]]
[[Category:7000 series non-storage mainframes]]

Revision as of 07:50, 2 September 2021

Manuals – Specifications – Links – Pictures

The Tektronix 7904 is a 500 MHz, non-storage 7000-series oscilloscope mainframe with four bays. It accepts two 7000-series vertical plug-ins and two 7000-series horizontal plug-ins. It was introduced in late 1971/early 1972 (Note 1). The successor model 7904A was introduced in 1984. There is also a rack-mount version, the R7903, albeit with only one horizontal bay.

Performance is largely determined by the plug-ins. The 7A19 vertical amplifier and 7B92 time base were introduced along with the 7904 to match the 500 MHz system bandwidth.

Design Staff of 7904 Project (from July 1971 Tekscope):

Val Garuts was project manager and developed the large signal amplifier circuit used in the horizontal and Z-axis amplifiers. Thor Hallen did the 7A19 plug-in and the vertical amplifier, and John McCormick the horizontal. The trigger and time base (7B92 plug-in) were done by Les Larson and Bill DeVey. Bill Peek worked on the Z-axis amplifier and auto-focus, with Hans Springer doing the mainframe interface and channel switching. Joe Burger's work on the power supply, coupled with Joel Swanno’s efforts in mechanical design, reduced the weight to only 30 pounds. Ken Hawken did the fine job on the CRT.

Key Specifications

Bandwidth 500 MHz
Fastest calibrated sweep 500 ps/Div (with 7B92A, other time bases "uncalibrated for first 60 ns")
Acceleration voltage 24 kV (+21 / -3 kV)
Calibrator (7904) 4 mV, 40 mV, 400 mV, 4 V or 40 V (p-p) into 1 MΩ; 2 mV, 20 mV, 200 mV or 400 mV into 50 Ω; or 40 mA; selectable 1 kHz, ½ rep. rate of B Sweep Gate, or DC
Calibrator (7904A) 4 mV to 4 V (p-p) in decade steps, 1 kHz; 40 mV to 400 mV into 50 Ω
Power consumption 190 W
Weight 13.5 kg (30 lbs)
CRT Options

7904A differences

The 7904A re-implements the vertical amplifier using Hypcon-packaged amplifier chips designed for the 7104, such as the 155-0178-00.

The 7904 had an elaborate 5-decade built-in calibrator with variable rate that was dropped from the 7904A. The rear remote control connector unique to the 7904 was dropped as well. In the 7904A, The Control Illumination switch moved to the rear panel, and the readout system gained a pulsed mode in which it is synchronized with the sweep instead of interrupting the display at random times. This pulsed mode is not compatible with all time base plug-ins (see manual p. 1-12).

Options

  • Opt.2: X-Y delay compensation network
  • Opt.3: Extra EMI shielding
  • Opt.4: Maximum-brightness CRT with reduced area
  • Opt.78: P11 phosphor

Operation

The 7904 has many modes of operation. One mode is called "Independent-Pairs Display" in the manual, where the input to the left vertical plug-in is displayed using the B horizontal time-base plug-in, and the input to the right vertical plug-in is displayed using the A horizontal time-base plug-in. This resembles the trace-slaving "ALT" mode that is produced by an 1A4 in a 547. Many other modes are available. It is possible to put vertical plug-ins in the horizontal slots for X-Y operation. It is even possible to put a horizontal plug-in in one of the vertical slots to produce a raster scan.

A special plug-in, the 7A21N, provides direct access to the deflection plates up to 1 GHz at an uncalibrated sensitivity of 4 V/Div. This plugin requires modifications to the mainframe to bypass the Y output amplifier (thus disabling readout and the other vertical plugin bay).

A rear-panel remote control connector has connections for single-sweep ready lamps, a reset button, and readout control.

Internals

The 7904 uses a switch-mode power supply and has no fan. It incorporates a 65 ns Y delay line. This delay is too short for some older time bases such as 7B53 to display the trigger event.

Thor Hallen designed the main vertical amplifier and the 7A19 plugin (Note 1). It used bridged T coils and the "ft doubler" circuit patented by Carl Battjes to achieve its bandwidth.

The 7904 makes extensive use of custom integrated circuits and hybrid circuits, inter alia, the 155-0064-00 470-ps output amplifier, 155-0022-00 analog multiplexer for channel switching, 155-0059-00 HF amplifier, 155-0095-01 and 155-0095-03 differential HF amplifiers, and 155-0067-02 SMPS controller.

The 7904A includes 155-0173-05, 155-0175-05 and 155-0178-05 amplifiers.

The signal path is completely differential and the internal signal wiring is 50 Ω coax. The CRT (154-0644-05) has distributed vertical deflection plates.

Prices

  Year 1972 1976 1980 1984 1990
Model 7904 7904 7904 7904A 7904A
Mainframe only Catalog price $2,900 $4,100 $6,265 $8,810 $12,750
2019 value $17,640 $18,320 $19,330 $21,550 $24,800
Mainframe with 7A19,
7A19 Opt. 04, 7B92
Catalog price $5,500 $7,765 $12,015 $17,425 $24,190
2019 value $33,450 $34,690 $37,070 $42,630 $47,050

Links

Notes

  1. See 7A11 and John Addis, Good Engineering and Fast Vertical Amplifiers, in Jim Williams (Ed.), Analog Circuit Design: Art, Science and Personalities (1991), p.114, and Tektronix New Products 1972 brochure.

Pictures

7904 non-A

Power Supply

7904A

Custom ICs used in the 7904

Page Model Part nos Description Designers Used in
155-0009-00 M001 155-0009-00 horizontal lockout logic Les Larson 7504 7514 7704 7704A R7704 7834 7844 7854 7904 R7903 7904A 7934 7104
155-0010-00 M004 155-0010-00 chop divider and blanking Les Larson 7504 7514 7704 R7704 7704A 7834 7854 7904 R7903 7904A 7934 7104
155-0011-00 M012 155-0011-00 clock and chop blanking Les Larson 485 7313 7403N R7403N 7503 7504 7514 7603 AN/USM-281C 7613 7623 7623A 7633 7704 R7704 7704A 7834 7844 7854 7904 7904A R7903 R7912 7912AD 7912HB 7934 7104 R7103 AN/USM-281C
155-0012-00 M015 155-0012-00 Z Axis Logic Les Larson 485 7504 7514 7704 R7704 7704A 7834 7844 7854 7904 R7903 7904A R7912 7934 7912AD 7912HB 7104 R7103
155-0013-00 M022 155-0013-00 155-0013-01 horizontal chop and alt. binary Les Larson 7504 7514 7704 R7704 7704A 7834 7854 7904 7904A R7903 7934 7104
155-0022-00 M036 155-0022-00 155-0022-01 analog multiplexer Gene Andrews 147 148 149 335 468 1430 1441 1461 1900 1910 2220 2221 2230 5223 5403 5440 5441 5443 5444 5A38 7313 7403N 7503 7504 7514 7603 AN/USM-281C 7613 7623 7623A 7633 7704 R7704 7704A 7834 7844 7854 R7912 7912AD 7912HB 7904 R7903 7904A 7934 7A12 7A18 7A18A 7A18N 7B52 7B53N 7D10 7D11 7D12 NT-7000 P7001
155-0059-00 M077A 155-0059-00 HF amplifier Thor Hallen 7834 7844 7854 7904 R7903 R7912 7912AD
155-0060-00 M071E 155-0060-00 155-0060-01 channel selector amplifier Hans Springer R7903 7904 R7912
155-0064-00 H074A 155-0064-00 vertical output amplifier 7834 7854 7904 R7903 7912AD 485 PG502
155-0065-00 H074 155-0065-00 155-0064-01 155-0125-00 deflection amplifier 7844 7904 R7912 R7903
155-0067-02 M091B 155-0067-00 155-0067-02 155-0067-03 SMPS controller Joe Burger Gene Andrews 7704A 7834 7844 7854 7904 R7903 7904 7904A 7934 R7912 7912AD 7912HB 7934 7104 R7103 308 434 485 690 P7001
155-0078-00 M084 155-0078-xx 155-0273-00 155-0274-00 broadband amplifier John Addis 464 465 466 468 475 475A 475M 485 7834 7844 7854 7904 R7903 R7912 7912AD 7912HB 7104 7A16A 7A16P 7A24 7A26 7A42 067-0587-01 067-0680-00 AM503 PG502 PG508 DC510 DC5010 FG5010
155-0095-00 155-0095-00 155-0095-00 155-0095-01 155-0095-03 HF differential amplifier 7834 7844 7904 R7903 R7912 7912AD
203-0126-90 M126 203-0126-90 ft doubler amplifier Hans Springer R7903 7904 7844

Custom ICs used in the 7904A

Page Model Part nos Description Designers Used in
155-0009-00 M001 155-0009-00 horizontal lockout logic Les Larson 7504 7514 7704 7704A R7704 7834 7844 7854 7904 R7903 7904A 7934 7104
155-0010-00 M004 155-0010-00 chop divider and blanking Les Larson 7504 7514 7704 R7704 7704A 7834 7854 7904 R7903 7904A 7934 7104
155-0011-00 M012 155-0011-00 clock and chop blanking Les Larson 485 7313 7403N R7403N 7503 7504 7514 7603 AN/USM-281C 7613 7623 7623A 7633 7704 R7704 7704A 7834 7844 7854 7904 7904A R7903 R7912 7912AD 7912HB 7934 7104 R7103 AN/USM-281C
155-0012-00 M015 155-0012-00 Z Axis Logic Les Larson 485 7504 7514 7704 R7704 7704A 7834 7844 7854 7904 R7903 7904A R7912 7934 7912AD 7912HB 7104 R7103
155-0013-00 M022 155-0013-00 155-0013-01 horizontal chop and alt. binary Les Larson 7504 7514 7704 R7704 7704A 7834 7854 7904 7904A R7903 7934 7104
155-0022-00 M036 155-0022-00 155-0022-01 analog multiplexer Gene Andrews 147 148 149 335 468 1430 1441 1461 1900 1910 2220 2221 2230 5223 5403 5440 5441 5443 5444 5A38 7313 7403N 7503 7504 7514 7603 AN/USM-281C 7613 7623 7623A 7633 7704 R7704 7704A 7834 7844 7854 R7912 7912AD 7912HB 7904 R7903 7904A 7934 7A12 7A18 7A18A 7A18N 7B52 7B53N 7D10 7D11 7D12 NT-7000 P7001
155-0067-02 M091B 155-0067-00 155-0067-02 155-0067-03 SMPS controller Joe Burger Gene Andrews 7704A 7834 7844 7854 7904 R7903 7904 7904A 7934 R7912 7912AD 7912HB 7934 7104 R7103 308 434 485 690 P7001
155-0150-00 H473 155-0150-00 trigger detector Art Metz 7904A 7104 7B10 7B15 7B92A SCD1000
155-0173-00 155-0173-00 155-0173-00 155-0173-05 vertical channel switch John Addis Wink Gross 7104 R7103 7904A 7934 EG&G N-AM-173A
155-0175-00 H476 155-0175-00 155-0175-05 broadband amplifier John Addis Wink Gross Carl Battjes 7904A 7912HB 7934 7104 R7103 7A29 7A29P 7F10 067-0587-02 067-0587-10 11A71 SCD1000 EG&G N-AM-173A
155-0178-00 H488 155-0178-00 155-0178-05 horizontal output amplifier Dave Morgan 7904A 7912HB 7934 7104

Custom ICs used in the 7000 series readout system

Page Model Part nos Description Designers Used in
155-0014-01 M019D 155-0014-00 155-0014-01 A/D converter Barrie Gilbert 7000 series readout system 7854 7934 7J20 7L5 P7001
155-0015-01 M020F 155-0015-00 155-0015-01 analog data switch Barrie Gilbert 7000 series readout system 7854 7934
155-0017-00 M025 155-0017-00 5 MHz decade counter Barrie Gilbert 7000 series readout system 7854 7934
155-0018-00 M026 155-0018-00 zeros logic control Les Larson 7000 series readout system 7934
155-0019-00 M027 155-0019-00 decimal point and spacing control Les Larson 7000 series readout system
155-0020-00 M028 155-0020-00 output assembler Les Larson 7000 series readout system
155-0021-00 M029C 155-0021-00 155-0021-01 timing generator Les Larson 7000 series readout system 7854 7934
155-0023-00 M160 155-0023-00 character generator (0 1 2 3 4 5 6 7 8 9) Barrie Gilbert 7000 series readout system
155-0024-00 M161 155-0024-00 character generator (↓ < I / + - + C Δ >) Barrie Gilbert 7000 series readout system
155-0025-00 M162 155-0025-00 character generator (m μ n p X K M G T R) Barrie Gilbert 7000 series readout system
155-0026-00 M163 155-0026-00 character generator (S V A W H d B c Ω E) Barrie Gilbert 7000 series readout system
155-0027-00 M164 155-0027-00 character generator (U N L Z Y P F J Q D) Barrie Gilbert 7000 series readout system