Vintage Tube Frequency oscillator for service of radios. Is has 2 sweep knobs Tested okay. Valves / Tubes ECH42 EF6N EBL21 EZ2 EFM1 150A1 Wave bands Wave Bands given in the notes. Power type and voltage Alternating Current supply (AC) / 110-245 Volt Material Metal case Model: Toongenerator GM2307 [ECH42] - Philips; Eindhoven tubes Shape Tablemodel, with any shape - general. Dimensions (WHD) 340 x 255 x 200 mm / 13.4 x 10 x 7.9 inch Notes Audio Frequency Oscillator, range 30 - 16000 Hz. Signal originated by beat of two HF signals produced by two seperate valve oscillators. Net weight (2.2 lb = 1 kg) 12 kg / 26 lb 6.9 oz (26.432 lb) Price in first year of sale 525.00 HFl Pictures are part of the description Carefully shipped!