Uploaded May 2019 | Updated September 2026, 1 week ago

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Selmer Truvoice TV15. Guitar Amp. Service and Test.
Made about 1950
Fix 2 manufacturing faults !!
Explanation of dangerous non isolated input socket.
The sound was poor due to the manufacturing faults.
But after fixing them, it now sounds alive (in more ways than one), loud and with great tone.
Wonderful lineup of 5 old audio valves (tubes).
U31, KT33C, KTZ63
No isolating transformer. The mains comes straight in.KT33
Explanation of circuit including the Barretter.