The High Voltage capacitors 600 to 2,000 VDC have a finite life. Unless you checked for leakage or ESR .... be suspect of values in range. Since you are in the UK, Farnell/element14 may be the best parts distributor. ASC Metalized Polyester Film, 6 kVolts http://www.justradios.com/ASCcapacitors.html Metalized Polypropylene Film, 1600 volts http://www.justradios.com/MPMcapacitors.html ==== DEC VT-220 : AMP/Tyco Mate-N-Lok http://avitech.com.au/?p=252 greg Sent from iPad Air Sent from iPad Air