I've found Brent Jesse to be a reputable tube dealer. A man of his word.
looking for tube info
purchased some older tube mono block amps,70 watt per,had output tubes tested all are weak,was advised to replace,my question is,current tubes are teslovak kt88sa,i,m told that they are of 1980,s vintage,4 per amp,i was told to replace with kt88 winged c,s,how will this effect my amps,if any ?thanks for your help,robin