Vintage Mullard 5-20 valve 20 watt amplifier, partridge transformers, EL34′s
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Vintage Mullard 5-20 valve 20 watt amplifier, partridge transformers, EL34′s Picture and Description:
This auction is for a vintage Mullard 5-20 valve amplifier in good physical condition and sounds superb. Although not commercially built it is up to professional standards, as can be seen from the photos. The output and mains transformers are both Partridge, the output transformer has 'C' core construction. Paper in oil capacitors are used in the H.T decoupling circuits and the layout is identical to the Mullard specifications. All valves are full emission and have been tested on an Avo MK4 valve tester. Included in the auction is an original 'Mullard Circuits for Audio Amplifiers' (1965) 136 pages in total, also a 1 metre mains lead, a 1 metre speaker lead and a coax to phono input adaptor. Valve line up: 2 x EL34, 1 x GZ34, 1 x ECC83, 1 x EF86. All valves are Mullard except a Mazda ECC83. Full specification: Output power 20 watts (distortion 0.05%), 27 watts output (distortion 0.1%) Frequency response 30Hz to 20KHz +/- 0.5dB Sensitivity for rated output power is 220mV Hum and noise -89dB Output impedance 8 ohms This item can be collected from the Audiojumble in Tonbridge, kent on 7th October see www.audiojumble.co.uk Postage quoted is for guidance only and does not include postal insurance. Exact cost will be advised at the end of the auction.