Information for Valve-Heads!

Williamson KT66 Push-Pull Amp. The Original Articles from the 1940s Wireless World Reprint. Click Here

Push-Pull PX4 Amp Circuit and Construction Article From Radio Constructor, Feb 1951. Click Here

Links to Useful Valve Data:

2A3 (RCA), 1938	300B (RCA), 1950	5AR4 (GE), 1963	5U4G (Sylvania), 1957	5U4GB (GE), 1963
6A3 (Tung-Sol), 1965	6B4G (Tung-Sol), 1965	6BQ5 (GE), 1963	6C5G/GT (Tung-Sol), 1965	6CA7 (Tung-Sol), 1965
6F6G/GT (Tung-Sol), 1965	6J5/GT (Tung-Sol), 1965	6J7G/GT (Tung-Sol), 1965	6L6G (Tung-Sol), 1965	6L6GB (Tung-Sol), 1965
6L6GC (Tung-Sol), 1965	6SL7GT (GE), 1963	6SN7GT (Tung-Sol), 1965	6SN7GTA/GTB (GE), 1963	6V6G/GT (Tung-Sol), 1965
12AT7 (GE), 1963	12AT7WA (Tung-Sol), 1965	12AU7 (GE), 1963	12AX7 (GE), 1963	12AX7A (GE), 1963
12AX7S (Philips), 1968	12AX7WA (Tung-Sol), 1965	211 (RCA), 1950	845 (RCA), 1950	5751 (Tung-Sol), 1965
5751WA (Tung-Sol), 1965	5881 (Tung-Sol), 1965	6922 (Raytheon), 1961	7581A (Tung-Sol), 1965	EF36 (Mullard), 1948
EF37 (Mullard), 1948	EF40 (Mullard), 1954	EF86 (Mullard), 1956	EL33 (Philips), 1953	EL34 (Mullard), 1964
EL37 (Mullard), 1948	EL84 (Mullard), 1964	EZ80 (Philips), 1953	EZ81 (Philips), 1957	GZ32 (Philips), 1949
GZ33 (Philips), 1958	GZ34 (Philips), 1958	GZ37 (philips), 1958	KT66 (MO Valve), 1977	KT77 (MO Valve), 1977
KT88 (MO Valve), 1977	PX4 (Marconi), 1957	PX25 (MO Valve), 1935	PX25A (MO Valve), 1935

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