4 El34s… one a Mullardand never cleaned since..Broken Bulgin socket…Replaced with modern mains connectorVery neat! some of the power supply caps are set to blow..Bias and bias balance control, some of the power supply caps are set to blow..new caps in positionSmaller than the originals but twice the capacity (the rectifier can take it )ooops broken impedance switch.. too easy to rest the whole chassis on this when it is out the caseNew switch installedTubs in and biased upWorking on the bench first time.. bias control range excellent even for modern tubes a few scratch pots easily fixed then all good to go!