Vhf Adaptor

In the VHF band, the old standard 51.5-ohm 15A" coaxial line is still widely used. The Type 874-QV2A Adaptor, shown in Figure 1, makes the transition

Figure 3. Voltage-standing-wave ratio of Type 874-QU3 Adaptor as a function of frequency.

Figure 3. Voltage-standing-wave ratio of Type 874-QU3 Adaptor as a function of frequency.

! TYPE 874-0U3 TYPE B74-QU3 I , ADAPTOR " ADAPTOR ^

! TYPE 874-0U3 TYPE B74-QU3 I , ADAPTOR " ADAPTOR ^

FREQUENCY- Mc

Figure 2. Cross section of Type 874-QU3 Adaptor to 50-ohm, 3 Vs -inch rigid line.

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