Note
Allied Radio catalog 1962 (copyright 1961), p. 412.
Allied Radio catalog 1963 (copyright 1962), p. 30.
QST, Mar 1963, p. 176.
QST, Dec 1963, p. 194.
Allied Radio catalog 1964 (copyright 1963), pp. 72, 226.
QST, Jan 1964, p. 184.
Allied Radio catalog 1965 (copyright 1964), p. 65.
Allied Radio catalog 1966 (copyright 1965), p. 74.
Allied Radio catalog 1967 (copyright 1966), p. 82.
Allied Radio catalog 1968 (copyright 1967), p. 460.
Allied Radio catalog 1969 (copyright 1968), p. 499.
Allied Radio catalog 1971 (copyright 1970), p. 391.
The Knight-Kit P-2 SWR/Power Meter (Catalog #83 YX 627R) was offered by Allied Radio for $14.95 in kit form. The instrument uses a two-piece chassis arrangement connected by a 4-foot shielded cable:
Coupler Unit: Housed in a compact metal enclosure measuring 2 x 5 x 2.5 inches. It features standard SO-239 RF coaxial connectors at each end, allowing it to remain permanently installed in the transmission line with negligible power loss.
Indicator Unit: Built into a 2.5 x 6.5 x 3 inch cabinet designed for desk mounting. The front panel contains a 100-microampere meter, a rotary sensitivity potentiometer knob, and a two-position switch for selecting forward or reflected power readings.
The P-2 employs the classic Monimatch reflectometer design, using a short section of internal coaxial transmission line flanked by two pickup loops. One pickup loop connects to diode CR-1 to measure forward RF voltage, while the second loop connects to diode CR-2 to measure reflected voltage.
The unit can be wired for either 52-ohm or 72-ohm coaxial feedlines by selecting the appropriate terminating resistors during assembly (160-ohm resistors for 52-ohm lines, or 100-ohm resistors for 72-ohm lines).
The entire instrument operates passively, requiring no batteries or external AC power source.
Specifications
– Frequency Coverage: 1.8 – 432 MHz.
– Power Handling: 1000 watts
– Sensitivity: Sensitivity varies with frequency, requiring 45 watts for full-scale meter deflection at 1.8 MHz, down to 0.5 watt at 432 MHz.
– Meter Scales: The 100 uA meter movement features a top arc calibrated directly in SWR from 1:1 to 20:1. A lower relative power scale spans 0 to 10; when multiplied by 10, this scale directly indicates the percentage of reflected power in the transmission line.
References
Review: CQ, Mar 1963, p. 31.
Review. 73, May 1963, p. 80.
