It is generally not good idea to switch a valve power amp on if it is not connected to the speakers.
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Cool. Be good to hear what you think after a burn-in.
Same valve types as the II and IV. Here is what I ordered from Watford Valves if you are interested.
EF95/M8100/6AK5/6J1-MULLARD (Mullard) GBP 10.00 x 2 = GBP 20.00
6H30EB-ELECTRO HARMONIX GOLD PIN (Electro Harmonix Gold) GBP 24.30 x 2 = GBP 48.60
What did you think of the LD III, John? Or have you already sent it bacK?
Chris