1209-BL: Difference between revisions
(Created page with "Type '''1209-BL Unit Oscillator (180-600 Mc)'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Oscillators Category:Unit Instruments") |
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{{GR Product | |||
|model=1209-BL | |||
|codes=ADMIT | |||
|class=oscillators | |||
|summary=Unit Oscillator | |||
|image=GR 1209-BL Close-Up.jpg | |||
|caption=General Radio 1209-BL Unit Oscillator | |||
|series=1209 | |||
|introduced=1959 | |||
|discontinued=1961 | |||
|designers= | |||
|manuals= | |||
* [[Media:GRwiki 1209-B Oscillator 1209-0100-L 08_1961.pdf|General Radio 1209-BL Unit Oscillator Manual 1209-0100-L 1961]] | |||
{{Catalog History}} | |||
}} | |||
The {{Title|General Radio 1209-BL Unit Oscillator}} was introduced in {{Catalog P}} and remained available through {{Catalog Q}}. | |||
The Type 1209-BL is a general-purpose frequency source covering 180 to 600 MHz. It uses a "[[butterfly circuit]]" to determine frequency. There are no sliding contacts, which makes swept operation possible. Direct amplitude modulation at audio frequencies is accessible by a phone jack on the oscillator housing. | |||
Available as an accessory were crystal-diode modulators [[1000-P6]] or [[1000-P7]] that can provide amplitude modulation at frequencies from 0 to 5 MHz. Pulse or square-wave modulation is available with the Type [[1264-A|1264-A modulating power supply]]. | |||
As part of the unit oscillator series, the 120i-BL requires an external power supply, [[1203-B]] and [[1201-A]] are recommended. The 1209-BL is similar to [[1209-B]] in design, construction and specifications except frequency range. | |||
==Specifications== | ==Specifications== | ||
* '''Frequency Range:''' 180 to 600 MHz | |||
* '''Frequency Calibration Accuracy:''' 1% | |||
* '''Warmup Frequency Drift (Typical):''' 0.2% | |||
* '''Output Power:''' 300 mW into 50 Ω with Type [[1203-B]] power supply | |||
==Links== | ==Links== | ||
* [[Media:GR Exp 1209-BL 01_1958.pdf|Experimenter January 1958 describing Type 1209-BL]] | |||
* [[Media:Litton Industries 6481 Tube Data.pdf|Litton Industries 6481 Tube Data]] | |||
* [[Media:2367681 Patent Butterfly tuned circuit.pdf|Patent for the Butterfly Tuning Circuit]] | |||
==Photos== | ==Photos== | ||
<gallery> | <gallery> | ||
GR 1209-BL Front.jpg | |||
GR 1209-BL Left.jpg | |||
GR 1209-BL Rear.jpg | |||
GR 1209-BL Right.jpg | |||
GR 1209-BL Right Open.jpg | |||
GR 1209-BL Inside Left.jpg | |||
GR 1209-BL Inside Left B.jpg | |||
GR 1209-BL Inside Rear.jpg | |||
GR 1209-BL Inside Top.jpg | |||
GR 1209-BL Inside Right.jpg | |||
GR 1209-BL Oscillator Tube.jpg | |||
GR 1209-BL Inside Shield and Probe.jpg | |||
GR 1209-BL Probe.jpg | |||
</gallery> | </gallery> | ||
[[Category:Oscillators]] | [[Category:Oscillators]] | ||
[[Category:Unit Instruments]] | [[Category:Unit Instruments]] | ||
Latest revision as of 18:42, 14 May 2024
The General Radio 1209-BL Unit Oscillator was introduced in Catalog P (1959) and remained available through Catalog Q (1961).
The Type 1209-BL is a general-purpose frequency source covering 180 to 600 MHz. It uses a "butterfly circuit" to determine frequency. There are no sliding contacts, which makes swept operation possible. Direct amplitude modulation at audio frequencies is accessible by a phone jack on the oscillator housing.
Available as an accessory were crystal-diode modulators 1000-P6 or 1000-P7 that can provide amplitude modulation at frequencies from 0 to 5 MHz. Pulse or square-wave modulation is available with the Type 1264-A modulating power supply.
As part of the unit oscillator series, the 120i-BL requires an external power supply, 1203-B and 1201-A are recommended. The 1209-BL is similar to 1209-B in design, construction and specifications except frequency range.
Specifications
- Frequency Range: 180 to 600 MHz
- Frequency Calibration Accuracy: 1%
- Warmup Frequency Drift (Typical): 0.2%
- Output Power: 300 mW into 50 Ω with Type 1203-B power supply
Links
- Experimenter January 1958 describing Type 1209-BL
- Litton Industries 6481 Tube Data
- Patent for the Butterfly Tuning Circuit
