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Doug – I just wanted to pipe up about the 45’s – they can be expensive – however – the audiophile guys are looking for new old stock or ones that test high for mutual transconductance – you can find ones on ebay that test a little low – (and buy from canadian sellers to keep the shipping low) the audio guys won’t buy them – hook up with someone who has an emission type tester and get yours tested – I have had tubes that tested as low as 30 or 40 percent that performed fine in a radio – its more important for your radio to have two that test about the same – the tube before the 45’s – called the driver tube or 1st audio tube needs to be strong in order to properly drive the two 45’s – the other tubes in the set are common – they shouldn’t be hard to get.