Radio & Amplifier Service Parts

4431 Bird Wattmeter with Variable RF Tap (Sampler)

Used 4431 RF Wattmeter Tested to meet factory spec. Same as the model 43 General Purpose Wattmeter with the addition of an RF signal sampler probe. This RF probe provides a low power sample of the signal being measured and is available at the female BNC connector on the right side of the housing. 

In excellent condition
100% tested and meets spec.
Used * No longer available for export
MFR: Bird Electronics, USA
SKU BIRD4431-2

• Designed for high power tube applications
• Includes one Carborundum 886 SP330K 33 Ohm Resistor 10%
• Overall size: 6-1/8" long x 2-13/16" diameter

Used * No longer available for export
MFR: East Coast Induction
SKU: CPS-ECI-P

CV1C-500FN/15 Vacuum Variable Capacitor, 8-250pf, 15kv Peak / 9KV, MFR: Comet (NOS) No longer available for Export

Bird's RF Selector Switches employ a unique, rugged and reliable design which permits positive contact, low insertion VSWR and negligible cross talk between channels. The switching mechanism is 4 1/2" of RG-87/U Teflon cable which is pulled away from the mating Male N connectors and rotated to the desired switch position.

Positions: 6
Coaxial Circuits: 1
Frequency Range: DC to 10 GHz
Maximum RF Voltage: 500 V
Attenuation for unused channel: 75 dB (cross talk)
Temperature Range: -60 to +65 °C (-76 to +149 °F)
Weight:  2-1/2 lbs. (1.1 kg)

New Old Stock * No longer available for export
MFR: Bird Electronic Corporation
SKU: BIRD74-NOS

• Actuation: Latching
• RF Connections: SMA Female
• Terminals: Solder type (Standard)

Used * no longer available for export
MFR: Narda 
SKU: 062-B37-A1C-4A2-P

• Actuation: Latching
• RF Connections: SMA Female
• Terminals: Solder type (Standard)

Used * No longer available for export
MFR: Narda 
SKU: 085-B37-A1C-4A2-P

UCSXF-2000-7.5 Vacuum Variable Capacitor, 50-2000pf, 7.5kv Peak, (Round Shaft 1/2")
Used clean * No longer available for export
MFR: Jennings
SKU: UCSXF-2000-7.5-P

FM3C Mounting Flange for Vacuum Capacitors 

Used * No longer available for export
SKU: FM3C-P

• Length: 4.25 in / 107.95 mm
• Width: 3.00 in / 76.200 mm
• Height: 0.75 in / 19.050 mm
• Inner Diameter: 2.043 in / 51.8922 mm
• (compatible with capacitors that use FM2 flanges)

Clean Used * No longer available for export
SKU: AMB-1