21-83C-11-xx-T Series, 746-776 MHz T-Pass Expansion Channel Bird

21-83C-11-xx-T Series, 746-776 MHz T-Pass Expansion Channel assemblies consist of the following items:

• A 6.625” 3-quarterwave T-Pass® cavity filter
• A dual ferrite isolator, with RF loads and coaxial cable for connection to the cavity
• An RF sampler to measure RF power reflected into the isolator output load
• Isolator and channel mounting hardware

Expansion assemblies for channel 2 and higher are supplied with a thruline of the correct length for the new channel frequency.

Starter channels (channel 1, bottom) are supplied with a short circuit on the T-Pass loop.

Ordering Information
To order an expansion channel, specify the following:

• Frequency and position of all channels in the system to be expanded
• New channel frequencies
• Transmitter output power on all new channels

T-Pass® Expansion Channel Guide
Tech-Aid No. 93002 (Lit. No. D3011F93) provides a listing of expansion channels by frequency range and isolator load power, as well as diagrams to facilitate selection of the correct channel configuration. Expansion channels are also available with 60-watt loads. Consult with factory.

1. Contact factory on expansion channels for frequencies below 220 or above 250 MHz.
2. “xx” in model number describes isolator and load configuration: 2B = 5W/25W; 2C 5W/60W; 2D = 5W/100W.