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Couldn't tell you the type.
Looks to be 4 similar tubes plus one smaller.
Looked up some Elkin pics; I think this is what it is.
The switches on my unit are only labeled on/off.
Knobs are unmarked. Some one added labels for ant/radio.
ELKIN FOR SURE THE BEST EVER MADE . DO NOT DRIVE NOTHING INTO BUT A 30 TO 50W RADIO AND IT ONLY WANT 1-3 WATTS DEAD KEY!!!!! IT LOOKS LIKE A 8 TUBE SHOULD HAVE 12DQ6 TUBES IN IT AS ALL THE 4/6/8 HAD 12DQ6 TUBE IN THEM. IF YOU WANT TO SELL IT LET ME KNOW AS I COLLECT THEM . I DONT LIVE FAR FROM ELKIN NC BUT I LIVE 15 MILES FROM A TECH THAT BUILT THESE AMP FOR 15 YRS.
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