Alpha Delta DELTA-4B/N
4-Way Coaxial Switch (1500 Watts CW)
The excellent quality of this device is characterized by a constant impedance microstrip cavity casting for UHF. It does not use lossy wafer switches, but a solid ball-bearing system. No uncertainty about which position has been chosen. Unused positions are automatically grounded to reduce noise interactions and potential discharges. The famous Alpha Delta Arc-Plug™ Cartridge protects the position in use. The antenna, whether in or out, is always protected in both cases! The Arc Plug is easily accessible from the front panel, so you can mount the switch on any surface. Both models support full legal power.
The VSWR is less than 1.2:1 up to 150 MHz, and less than 1.5:1 at 500 MHz for the DELTA series with UHF connectors.
Models with N-type connectors have a VSWR of less than 1.2:1 up to 500 MHz and less than 1.5:1 at 1.2 GHz.
Switches with SO-239 (UHF) are rated for 1500 watts CW/FM up to 30 MHz and 1000 watts from 30 to 450 MHz, assuming a VSWR of less than 2:1. Higher VSWR values at full power could trip the ARC-PLUG cartridge. Isolation of 60 dB up to 450 MHz, typically 70 dB below 30 MHz.
Switches with N-type connectors are rated for power up to 1500 watts CW/FM up to 150 MHz, 1000 watts from 150 to 500 MHz, and 800 watts from 500 to 1.2 GHz. NOTE: 1.2 GHz, not 1.3 GHz. Isolation of 60 dB up to 500 MHz and 50 dB from 500 MHz up to 1.2 GHz, assuming a VSWR not greater than 2:1.
All models have such low losses that the interconnecting cables usually have more losses than the switches themselves.
