01-05-2024, 03:15 PM
A 1Q5 and 1C5 are listed as possible substitute tubes for the 1A5 (its listed as a 1A5GT) on the NJ7P tube database
https://nj7p.org/Tubes/SQL/Tube_query.php?Type=1A5GT
https://nj7p.org/Tubes/SQL/Tube_query.php?Type=1A5GT