GB547498A - Improvements relating to short and ultra short wave oscillators - Google Patents
Improvements relating to short and ultra short wave oscillatorsInfo
- Publication number
- GB547498A GB547498A GB2749/41A GB274941A GB547498A GB 547498 A GB547498 A GB 547498A GB 2749/41 A GB2749/41 A GB 2749/41A GB 274941 A GB274941 A GB 274941A GB 547498 A GB547498 A GB 547498A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lines
- condenser
- grid
- trimming
- balance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/18—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance
- H03B5/1817—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a cavity resonator
- H03B5/1835—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a cavity resonator the active element in the amplifier being a vacuum tube
Landscapes
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
547,498. Valve generating circuits. STANDARD TELEPHONES & CABLES, Ltd., and WILLOUGHBY, E. O. Feb. 28, 1941, No. 2749. [Class 40 (v)] In a single valve ultra short wave oscillator having transmission line tank circuits coupled to the grid and plate electrodes, a trimming condenser tied to the plate line is provided to balance the grid and plate transmission lines to cathode. Fig. 2 shows an arrangement with the output co-axial line LO tapped to the plate line AL, trimming condenser Cb being adjusted to rebalance the lines. Since the inductance L of the cathode lead only carries the out of balance current it may be neglected provided the lines AL, GL are of correct length and balanced. Alternatively a small condenser to tune may be connected across the lines. Fig. 3 shows an arrangement in which series condensers C1, C, both balance and trim, the difference C1-C2 being the balancing capacity and the series value, namely C1, C2/C1+C2 being the trimming or tuning adjustment. With valves of a large amplification factor a high grid leak may be necessary to prevent excessive grid swing unless a capacitive reactance, which may be a condenser or a length of transmission line, is placed in the cathode lead. The single valve may be replaced by a number of valves in parallel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2749/41A GB547498A (en) | 1941-02-28 | 1941-02-28 | Improvements relating to short and ultra short wave oscillators |
| US432601A US2429656A (en) | 1941-02-28 | 1942-02-27 | Balanced transmission line oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2749/41A GB547498A (en) | 1941-02-28 | 1941-02-28 | Improvements relating to short and ultra short wave oscillators |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB547498A true GB547498A (en) | 1942-08-31 |
Family
ID=9745157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2749/41A Expired GB547498A (en) | 1941-02-28 | 1941-02-28 | Improvements relating to short and ultra short wave oscillators |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2429656A (en) |
| GB (1) | GB547498A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2724055A (en) * | 1945-09-17 | 1955-11-15 | Bliss William Roderic | Coupling system for high frequencies |
| US2740889A (en) * | 1951-07-31 | 1956-04-03 | Rca Corp | Stable ultra-high frequency oscillation generator |
| US2778941A (en) * | 1952-11-06 | 1957-01-22 | Polytechnic Res & Dev Co Inc | Wide range oscillator |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1995175A (en) * | 1931-06-12 | 1935-03-19 | Rca Corp | Electrical oscillation generator |
| DE659531C (en) * | 1933-02-26 | 1938-05-05 | Telefunken Gmbh | Tube transmitter circuit for short waves |
| US2068990A (en) * | 1934-06-01 | 1937-01-26 | Fed Telegraph Co | High frequency oscillation generator |
| US2243574A (en) * | 1939-08-01 | 1941-05-27 | Gen Electric | Electrical discharge apparatus |
-
1941
- 1941-02-28 GB GB2749/41A patent/GB547498A/en not_active Expired
-
1942
- 1942-02-27 US US432601A patent/US2429656A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2429656A (en) | 1947-10-28 |
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