1025-A: Difference between revisions

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{{GR Product
{{GR Product
|model=1025-A
|model=1025-A
|codewords=
|class=oscillators
|class=oscillators
|summary=sweep oscillator
|summary=Sweep generator
|image=GR 1025-A Front.jpg
|image=GR 1025-A Front.jpg
|caption=General Radio 1025-A Sweep Frequency Generator
|caption=General Radio 1025-A Sweep Frequency Generator
Line 8: Line 9:
|introduced=1963
|introduced=1963
|discontinued=1968
|discontinued=1968
|designers=W. F. Byers;E. Karplus;E. Favre;D. Foss;W. Montague
|designers=W. F. Byers,Eduard Karplus,E. Favre,D. Foss,W. Montague
|manuals=
|manuals=
* [[Media:GRwiki 1025-A Generator 1025-0110-B 1965.pdf|General Radio 1025-A Sweep Frequency Generator Manual 1025-0110-B 1965]]
* [[Media:GRwiki 1025-A Generator 1025-0110-B 1965.pdf|General Radio 1025-A Sweep Frequency Generator Manual 1025-0110-B 1965]]
{{Catalog History}}
}}
}}
The '''General Radio 1025-A Sweep Frequency Generator''' was introduced in 1963 Catalog R and remained available through Catalog T 1968.
The {{Title|General Radio 1025-A Sweep Frequency Generator}} was introduced in {{Catalog R}} and remained available through {{Catalog T}}.


The type 1025-A is motor driven type sweep oscillator.  The frequency determining variable capacitors rotor is motor driven.  Also mounted on the rotor is a trigger used to create a marker for the swept frequency.  The oscillator covers 0.7 to 230 MHz plus two band spread segments.  The segments on this particular unit are 400 to 500 kHz for broadcast radio IF frequency and 10.7 MHz ±300 kHz for FM and TV broadcast IF frequencies. Other custom band spread segments were available. There's also a control to manually turn the rotor to set up the sweep characteristics.
Its frequency-determining variable capacitor rotor is motor-driven.  Also mounted on the rotor is a trigger used to create a marker for the swept frequency.   
The oscillator covers 0.7 to 230 MHz plus two band spread segments.   
The segments on this particular unit are 400 to 500 kHz for broadcast radio IF frequency, and 10.7 MHz ±300 kHz for FM and TV broadcast IF frequencies.  
Other custom band spread segments were available. There's also a control to manually turn the rotor to set up the sweep characteristics.


==Specifications==
==Specifications==
* '''Frequency Range:''' 0.7 to 230 MHz in 10 ranges plus band spread ranges.
* '''Frequency Range:''' 0.7 to 230 MHz in 10 ranges plus band spread ranges
* '''Calibration Accuracy:''' At output voltages less than 0.3 volt, frequency is indicated to within +0.5%.
* '''Calibration Accuracy:''' At output voltages less than 0.3 volt, frequency is indicated to within +0.5%
* '''Drift:''' Not greater than 0.3% for five hours after one-hour warmup.
* '''Drift:''' Not greater than 0.3% for five hours after one-hour warmup
* '''Sweeping Rate:''' 22.2 milliseconds 20 times per second.
* '''Sweeping Rate:''' 22.2 milliseconds 20 times per second


==Links==
==Links==
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GR 1025-A Left Side B.jpg
GR 1025-A Left Side B.jpg
GR 1025-A Left Side.jpg
GR 1025-A Left Side.jpg
GR 1025-A Left Side C.jpg|Sweep Motor Upper  Power Supply Lower
GR 1025-A Left Side C.jpg                   | Sweep Motor Upper  Power Supply Lower
GR 1025-A Sweep Drive Motor and Clutch.jpg|Sweep Drive Motor and Clutch Assembly
GR 1025-A Sweep Drive Motor and Clutch.jpg | Sweep Drive Motor and Clutch Assembly
GR 1025-A Upper Left.jpg|200 V regulator (A5)
GR 1025-A Upper Left.jpg                   | 200 V regulator (A5)
GR 1025-A Rear left.jpg|Power Supply
GR 1025-A Rear left.jpg                     | Power Supply
GR 1025-A Rear Lower Right.jpg|Top Side of (A4) board
GR 1025-A Rear Lower Right.jpg             | Top Side of (A4) board
GR 1025-A Rear Upper Right.jpg|Top Side of (A3) board
GR 1025-A Rear Upper Right.jpg             | Top Side of (A3) board
GR 1025-A Right Side Attenuator.jpg| Attenuator
GR 1025-A Right Side Attenuator.jpg         | Attenuator
GR 1025-A Right Side Board A3.jpg|-150 V regulator and meter circuit (A3)
GR 1025-A Right Side Board A3.jpg           | -150 V regulator and meter circuit (A3)
GR 1025-A Right Side Board A4.jpg|Automatic amplitude-control amplifier (A4)
GR 1025-A Right Side Board A4.jpg           | Automatic amplitude-control amplifier (A4)
GR 1025-A Power Supply Close-up.jpg| Power Supply Board (A8)
GR 1025-A Power Supply Close-up.jpg         | Power Supply Board (A8)
GR 1025-A Rear Shield A.jpg|Band Switch Turret and Variable Capacitor Shield Removed
GR 1025-A Rear Shield A.jpg                 | Band Switch Turret and Variable Capacitor Shield Removed
GR 1025-A Rear Shield Band Turret.jpg| Band Switch Turret
GR 1025-A Rear Shield Band Turret.jpg       | Band Switch Turret
GR 1025-A Motorized Variable Capacitor.jpg|Motorized Tuning Capacitor
GR 1025-A Motorized Variable Capacitor.jpg | Motorized Tuning Capacitor
GR 1025-A Oscillator Close-up.jpg| Oscillator Close-up    5675 Triode Vacuum Tube
GR 1025-A Oscillator Close-up.jpg           | Oscillator Close-up    5675 Triode Vacuum Tube




Latest revision as of 19:16, 22 September 2024

General Radio 1025-A
Sweep generator
General Radio 1025-A Sweep Frequency Generator

Available from 1963 to 1968

Manuals
Catalog History
 Document Year Page
Catalog R 1963 128
Catalog S 1965 148
Catalog T 1968 196
(All manuals in PDF format unless noted otherwise)

The General Radio 1025-A Sweep Frequency Generator was introduced in Catalog R (1963) and remained available through Catalog T (1968).

Its frequency-determining variable capacitor rotor is motor-driven. Also mounted on the rotor is a trigger used to create a marker for the swept frequency. The oscillator covers 0.7 to 230 MHz plus two band spread segments. The segments on this particular unit are 400 to 500 kHz for broadcast radio IF frequency, and 10.7 MHz ±300 kHz for FM and TV broadcast IF frequencies. Other custom band spread segments were available. There's also a control to manually turn the rotor to set up the sweep characteristics.

Specifications

  • Frequency Range: 0.7 to 230 MHz in 10 ranges plus band spread ranges
  • Calibration Accuracy: At output voltages less than 0.3 volt, frequency is indicated to within +0.5%
  • Drift: Not greater than 0.3% for five hours after one-hour warmup
  • Sweeping Rate: 22.2 milliseconds 20 times per second

Links

Photos

  • Sweep Motor Upper Power Supply Lower

    Sweep Motor Upper Power Supply Lower

  • Sweep Drive Motor and Clutch Assembly

    Sweep Drive Motor and Clutch Assembly

  • 200 V regulator (A5)

    200 V regulator (A5)

  • Power Supply

    Power Supply

  • Top Side of (A4) board

    Top Side of (A4) board

  • Top Side of (A3) board

    Top Side of (A3) board

  • Attenuator

    Attenuator

  • -150 V regulator and meter circuit (A3)

    -150 V regulator and meter circuit (A3)

  • Automatic amplitude-control amplifier (A4)

    Automatic amplitude-control amplifier (A4)

  • Power Supply Board (A8)

    Power Supply Board (A8)

  • Band Switch Turret and Variable Capacitor Shield Removed

    Band Switch Turret and Variable Capacitor Shield Removed

  • Band Switch Turret

    Band Switch Turret

  • Motorized Tuning Capacitor

    Motorized Tuning Capacitor

  • Oscillator Close-up 5675 Triode Vacuum Tube

    Oscillator Close-up 5675 Triode Vacuum Tube

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