Coax Switches

Series 78 Dow-Key: Selector switches are conservatively rated @ 1000w @ 100 MHz or 200w @ 2.5 GHz. 50 dB minimum isolation, 0.1 dB max. insertion loss. DowKey quality, a good choice for the station. Rotor locks into place. Pull and turn for new position.

Shaft Dia: 1/4"
Good condition with some cosmetic wear.   
Used * No longer available for export
MFR: Dow-Key (Division of Kilovac)
SKU: 78-108-P

• Shaft Diameter: 1/4"
• No Dial plate
• No Knob
• Size: 3" Diameter x 1.1" Wide (Body) x 1.84" Wide (overall with connectors)

Used * No longer available for export 
MFR: Dow-Key Company
SKU: 78-0444-P

Dow-Key Series 78 selector switches are conservatively rated 1000w @ 50 MHz to 450w @ 450 MHz and 60 dB minimum isolation. Dow-Key quality, a good choice for the station.
Used * No longer available for export
MFR: Dow-Key, USA
SKU: 78-0404-P

• Missing Knob

Dow-Key Series 78 selector switches are conservatively rated 1000w @ 50 MHz to 450w @ 450 MHz and 60 dB minimum isolation. Dow-Key quality, a good choice for the station.
Used * No longer available for export
MFR: Dow-Key, USA
SKU: 78-0404-NO-KNOB-P

• Missing Knob
• No Dial Plate

Dow-Key Series 78 selector switches are conservatively rated 1000w @ 50 MHz to 450w @ 450 MHz and 60 dB minimum isolation. Dow-Key quality, a good choice for the station.
Used * No longer available for export
MFR: Dow-Key, USA
SKU: 78-0404-NO-PLATE-NO-KNOB-P

DowKey Series 78 selector switches are conservatively rated 1000w @ 50 MHz to 450w @ 450 MHz and 60 dB minimum isolation. DowKey quality, a good choice for the station.

Clean Good condition with some cosmetic wear
Used * No longer available for export
MFR: Dow-Key Co, USA
SKU: 78-0204-P

Note: Picture for reference only

These medium size, light-weight relays are designed and manufactured with gold plated RF contacts and silver plated outer conductors which give good RF performance to 1 GHz.

• Isolation: greater than 30dB
• Insertion loss: less than 0.15dB

New Old Stock * No longer available for export 
MFR: Dow-Key 
SKU: 77-260232

• Typical Operating Values
• Connectors: N-Type (F)
• Frequency Range: DC - 10 GHz
• RF Voltage: 500 Volts rms (max)
• Attenuation to Unused Channel: 75 dB
• Dent on center connection (does not affect transmission)

Used * No longer available for export
MFR: Bird Electronics
SKU: 7441

• New in Original Packaging
• Frequency: (Max.): 2.0 GHz
• Operating Voltage: 20-32Vdc (28Vdc Nominal)
• Operating Current: 108mA Typical @ 28Vdc & 20 °C

New Old Stock * no longer available for export
MFR: Dow-Key Microwave Corporation
SKU: 6406302-1

Data Sheet