Note
73, Oct 1967, p. 90.
Allied Radio catalog 1968 (copyright 1967), p. 452.
Brief description. Popular Electronics, Feb 1968, p. 73.
Allied Radio catalog 1969 (copyright 1968), p. 498.
Allied Radio catalog 1971 (copyright 1970), p. 391.
The Knight-Kit T-175 6 and 10 meter linear amplifier used a pair of 6JE6A sweep tubes. It ran 150 watts input on CW, 300 watts PEP on SSB, and could be used on AM by reducing input power to 240 watts. It had an automatic antenna changeover relay and internal cooling fan.
Features
– Designed as a grounded-grid, Class B RF linear amplifier delivering output across 6, 10, and 11-meter bands.
– Supports AM Linear, AM Plate Modulated, CW, and Single Side Band (SSB) modes.
– Integrates both the power supply and antenna changeover relay within a single cabinet enclosure.
– Features a transmit-activated cooling fan combined with thermal radiators mounted on top of the plate caps.
– Equipped with two separate meters to continuously monitor Plate Current and combination Grid Current/Relative Output Power.
– Works with exciters requiring 1 to 4 watts drive power and includes a 50 ohm, 5-watt swamping resistor for use with higher-power exciters.
– Features an OPERATE/STANDBY switch allowing the transceiver to operate directly ("barefoot") without needing to disconnect the amplifier.
– Can function as a high-level, plate-modulated RF amplifier requiring 80 watts of audio power.
– Full-wave voltage doubler high-voltage supply; half-wave voltage doubler bias supply
Specifications
– Frequency Range 6, 10, and 11-meter bands (27–30 MHz; 50–54 MHz) (6m and 10/11m coils supplied)
– Class of Operation Class B, Grounded Grid
– Input Impedance 50 ohm nominal
– Output Impedance 50 to 70 ohm Pi matching network (VSWR 3:1 or less)
– Drive Requirements
AM Linear: 1 to 4 watts
AM Plate Modulated: 1 to 4 watts
CW: 7 watts
SSB: 15 watts PEP max
– Plate Power Input
AM Linear: 120 watts max
AM Plate Modulated: 120 watts max
CW: 150 watts max
SSB: 300 watts PEP max
Tube Complement
– (2) 6JE6A output amplifiers
– 12AT7 relay amplifier
Power Requirements: 110–130 VAC, 60 Hz, 220 watts max (45 watts standby)
References
Review. 73, Oct 1967, p. 90.
