Summary History and Specifications
of Henry Tube Amplifiers

Model	Dates of Manufacture	Tube Complement	Frequencies	Configuration
1KD-5	1980-1988	3-500Z x 1	3.5-30 MHz	Desk-1 piece
2K	1963-1965	3-400Z x 2	3.5-30 MHz	Console
2KD	1963-1965	3-400Z x 2	3.5-30 MHz	Desk-2 piece
2K2	1965-1967	3-400Z x 2	3.5-30 MHz	Console
2KD2	1965-1967	3-400Z x 2	3.5-30 MHz	Desk-2 piece
2KD Standard	1996-1998	3-500Z x 1	3.5-30 MHz	Desk-1 piece
2K3	1967-1970	3-500Z x 2	3.5-30 MHz	Console
2KD3	1967-1970	3-500Z x 2	3.5-30 MHz	Desk-2 piece
2K4	1970-1980	3-500Z x 2	3.5-30 MHz	Console
2KD4	1970-1980	3-500Z x 2	3.5-30 MHz	Desk-2 piece
2K-4A	1978-1980	3-500Z x 2	3.5-30 MHz	Console
2KD5	1980-1984	3-500Z x 2	3.5-30 MHz	Desk-1 piece
2K Classic	1980 to 2004	3-500 x 2	3.5-30 MHz	Console
2K Classic X	1982 to 2004	3-500 x 2	3.5-30 MHz	Console-HD supply
2KD Classic	1984 to 2005	3-500 x 2	3.5-30 MHz	Desk-1 piece
2K Ultra	1972-1976	8873 x 2	3.5-30 MHz	Desk –2 piece
3K	1967-1970	3-500Z x 2	3.5-30 MHz	Console-HD supply
3KA	1970-1978	3-500Z x 2	3.5-30 MHz	Console-HD supply
3K Classic – 8877	1980-1984	8877/3CX1500A7	3.5-30 MHz	Console-HD supply
3K Classic X Mk II	1984 to 2004	3CX1200A7	3.5-30 MHz	Console-HD supply
3KD Premier	1985-1999	3CX1200D7	1.8-30 MHz	Desk-1 piece
3KD Premier – 8877	1999 to 2003	8877/3CX1500A7	1.8-30 MHz	Desk-1 piece
3KD Classic	1996-1998	3CX1200D7	3.5-30 MHz	Desk-1 piece
3K Premier	1985 to 2005	3CX1200A7	1.8-30 MHz	Console-HD supply
3K Ultra	1991 to 2005	3CX1200D7	1.8-30 MHz	2 piece-Remote Tune
4K	1966-1967	5CX1500A	3.5-30 MHz	Console
4K2	1967-1968	5CX1500A	3.5-30 MHz	Console
4K Ultra	1971-1982	8877/3CX1500A7	3.5-30 MHz	Console
5K Classic	1988 to 2005	3CX1200A7 x 2	3.5-30 MHz	Console
6N2	1972-1975	8874 x 2	50 and 144 MHz	Desk-1 piece
8K Ultra	1991 to 2005	3CX3000A7	1.8-30 MHz	2 piece-Remote Tune
2000	1970-1972	3-500Z x 2	3.5-30 MHz	Mfr. by E.F Johnson
2001	1974-1978	8874 x 2	3.5-30 MHz	Desk-1 piece
2002	1972-1981	8874 x 2	144-148 MHz	Desk-1 piece
2002A	1981 to 2005	3CX800A7	144-148 MHz	Desk-1 piece
2002A-220	1990 to 2004	3CX800A7	220-225 MHz	Desk-1 piece
2004A	1982 to 2005	8874 x 2	430-440 MHz	Desk-1 piece
2006	1972-1981	8874 x 2	50-54 MHz	Desk-1 piece
2006A	1981 to 2005	3CX800A7	50-54 MHz	Desk-1 piece
2502A	1999 to 2004	3CPX800A7	144-148 MHz	Desk-1 piece
2502A-220	1999 to 2004	3CPX800A7	220-225 MHz	Desk-1 piece
2504A	1999 to 2004	3CPX800A7	430-440 MHz	Desk-1 piece
2506A	1999 to 2004	3CPX800A7	50-54 MHz	Desk-1 piece
3002A	1983 to 2005	8877/3CX1500A7	144-148 MHz	Console-HD supply
3002A-220	1983 to 2004	8877/3CX1500A7	220-225 MHz	Console-HD supply
3004A	1983 to 2005	8877/3CX1500A7	430-440 MHz	Rack Cabinet
3006A	1983 to 2005	8877/3CX1500A7	50-54 MHz	Console-HD supply
3006B	1990-1992	3CX1200Z7	50-54 MHz	Console-HD supply
4002A	2000 to 2005	3CX3000A7	144-148 MHz	Rack Cabinet
4006A	2000 to 2005	3CX3000A7	50-54 MHz	Rack Cabinet
T2000	1972 to 1976	8874 x 2	3.5-30 MHz	Desk-1 piece
SS500HF	1996 to 1999	Solid State	1.8-30 MHz	13.8 Mobile or Base
SS750HF	1996 to 2005	Solid State	1.8-30 MHz	13.8 Mobile or Base
SS1200HF	1997 to 2005	Solid State	1.8-30 MHz	24.0 Mobile or Base
T2000	1972 to 1976	8874 x 2	3.5-30 MHz	Desk-1 piece