Note
QST, Aug 1963, p. 128.
QST, Jun 1965, p. 175.
QST, Dec 1965, p. 157.
QST, Sep 1966, p. 168. (could be NOS)
The LA-500-M “Spitfire”linear amplifierfrom P&H Electronics used six parallel 12JB6 tubes in grounded grid. Power input was 1000 watts PEP. It was advertised for mobile operation and had an optional DC supply, but a 115 VAC home-station supply was also available. Requires PS-1000 AV power supply, or PC-1000B DC power supply.