YD1175/8952 YD1177/8958 RF Power Triodes

The YD1175/8952 and YD1177/8958 are RF power triodes in metal-ceramic construction intended for use as industrial oscillators. The YD1175 is forced-air cooled. The YD1177 has an integral water cooler. GENERAL DATA Electrical: Direct, Filament-Thoriated Tungsten VoltageNote 1 Current

5.8 130

V A

Characteristics: measured at: Va = 8 kV, Ia =1.2 A Amplification Factor Transconductance Direct Interelectrode Capacities: Grid-Anode Grid-Filament Anode-Filament

µ S

45 35

mA/V

Cag Cgf Caf

17 47 .4

pF pF pF

Mechanical: YD1175/8952 Overall Dimensions: Length Diameter Mounting Position Cooling Type:

YD1177/8958

220 251 158-160 131 See outline drawings air water

mm (max) mm (max)

40W267 Keslinger Road LaFox, IL 60147 USA (630) 208-2200 • (800) 348-5580

YD1175/8952, YD1177/8958

Cooling: To obtain optimum life, the temperature of the seals/envelope should, under normal operating conditions, be kept below 200oC. To maintain these temperatures additional cooling may be necessary. At frequencies higher than about 4 MHz, cooling of the seals becomes mandatory. YD1175/8952 Table 1: Air cooling characteristics anode + grid dissipation W a+W g kW

Altitude h m

inlet temperature Ti °C

rate of flow qmin l/min

pressure drop ∆P kPa*

10 8 6 4

0 0 0 0

35 35 35 35

9.5 6.5 4.5 3.0

550 280 150 80

94 105 113 117

10 8 6 4

0 0 0 0

45 45 45 45

11.0 7.6 5.2 3.5

690 350 190 100

98 108 115 119

10 8 6 4

1500 1500 1500 1500

35 35 35 35

11.4 7.8 5.5 3.6

630 320 170 90

94 105 113 117

10 8 6 4

3000 3000 3000 3000

25 25 25 25

12.0 8.2 5.7 3.8

620 320 170 90

90 102 111 116

Absolute maximum air inlet temperature: Direction of airflow: arbitrary

Ti max.

outlet temperature TO °C

45oC

* 1 Pa=0.1 mm H20 YD1177/8958 Table 2: Water cooling characteristics anode + grid dissipation W a +W g kW 15 10 5

inlet temperature Ti °C 20 50 20 50 20 50

Absolute max. water inlet temperature Absolute max water pressure **100 kPa=1 at

Ti max P max

rate of flow qmin l/min 7.5 11.0 5.0 7.2 2.5 3.7

50 °C 600 kPa

A low velocity airflow may be required for cooling of the seals.

Page 2

pressure drop delta P kPa** 50 100 24 47 7 17

outlet temperature TO °C 50 71 51 72 53 73

YD1175/8952, YD1177/8958 LIMITING VALUES (Absolute maximum rating system) Frequency Anode Voltage Anode Current Anode input power Anode dissipation Anode dissipation Grid voltage Grid current, on load Grid current, off load Grid dissipation Grid circuit resistance Cathode current mean peak Envelope Temperature

f Va Ia WIa Wa Wa -Vg Ig Ig Wg Rg

up to max. max. max. max. max. max. max. max. max. max.

Ik Ikp Tenv

max. max. max.

RF CLASS C OSCILLATOR FOR INDUSTRIAL OPERATING CONDITIONS Frequency f Oscillator output power (Wo-Wfeedb) Wosc Anode Voltage Va Anode Current Ia Anode input power Wia Anode dissipation Wa Anode output power Wo Anode efficiency na Oscillator efficiency nosc Feedback ratio Vgp/Vap Grid resistor Rg Grid current, on load Ig Grid voltage, negative -Vg Grid dissipation Wg Grid resistor dissipation W rg

USE

Peak filament starting current Cold filament resistance

max. max.

Ifp Rfo

120 15.6 6 3.6 21.6 5.4 16.2 75 72.2 12 300 1.0 300 290 300

YD1175 YD1177

120 12 4 40 10 15 1.5 1.1 1.6 350 10

MHzNote 2 kV A kW kW kW kV A A W kΩ

5 A 25 A 240 °C

120 22.0 8 3.6 28.8 6.1 22.7 78.8 76.3 10 400 1.0 400 290 400

120 26.5 10 3.4 34.0 6.8 27.2 80 78 9 560 .9 500 240 450

MHz kW kV A kW kW kW % % % Ω A V W W

800 A 5.6 Ω

Notes section: 1. The filament is designed to accept temporary fluctuations of +5% and -10% To ensure that the cathode temperature remains constant irrespective of the operating frequency it may be necessary to reduce the filament voltage at higher frequencies. When doing so, you must remember that the filament voltage-to-current ratio, as measured with only the filament voltage applied, should remain constant under all operating conditions. It is extremely important that the filament be properly decoupled. This should be done so that the resonance of the circuit formed by the filament and the decoupling elements remain below the fundamental oscillator frequency. In grounded-grid circuits this resonance should be below the grid-cathode resonance. 2. When the tubes are to be used at frequencies above 30 MHz, the manufacturer should be consulted for more detailed information.

Page 3

YD1175/8952, YD1177/8958 Figure 1 - Constant Current Characteristics

Richardson Electronics, Ltd. acquired Philips Electronics' transmitting tube operation in 1988. Richardson Electronics continues to manufacture these high quality electron tubes under the Amperex name. Characteristics and operating values are based upon performance tests. These figures may change without notice as the result of additional data or product refinement. Richardson Electronics, Ltd. should be consulted before using this information for final equipment design.

Page 4

YD1175/8952 Figure 2 - Mechanical Outline *Dimensions in mm

MECHANICAL DATA: Net Mass: 7.5 kg Mounting Position: Vertical with anode up or down ACCESSORIES: Insulating Pedestal

*Note:

All

dimensions

Type 40654

for

reference

only.

Page 5

YD1177/8952 Figure 3 - Mechanical Outline *Dimensions in mm

MECHANICAL DATA: Net Mass: 2.4 kg Mounting Position: Vertical with anode up or down ACCESSORIES: Filament connector with cable 40692A Filament/cathode connector with cable 40693A Grid connector f < 4 MHz 40690 f > 4 MHz 40691 *Note: Page 6

All

dimensions

for

reference

only.