Rolling Candidates to replace 7581

Beam Tetrode — Octal

Drop-In Replacements

✓ 7581A

Rolling Candidates (138)

Heater:

Fit:

Status:16 shown (target 6.3V only)

6.3V Heater(16 candidates)

Tube	Status ↑	Pa	Ah	Fit
6L6GC	✓ Close	30W	0.9	drop-in
6384	✓ Close	30W	1.2	adapter
6889	✓ Close	30W	1.2	adapter
KT90	✓ Safe	50W	1.6	drop-in
6550	✓ Safe	42W	1.6	drop-in
KT88	✓ Safe	35W	1.6	drop-in
KT170	✓ Safe	85W	1.85	adapter
KT150	✓ Safe	70W	1.75	adapter
KT120	✓ Safe	60W	1.8	adapter
EL156	✓ Safe	50W	1.9	adapter
EL51	✓ Safe	45W	1.9	adapter
12E1	✓ Safe	35W	1.6	adapter
7027A	✓ Safe	35W	0.9	adapter
6KN6	✓ Safe	30W	3	adapter
EL55	✓ Safe	30W	1.3	adapter
F2a	✓ Safe	30W	2	adapter

target +0 selectedpick 1+ to compareselect 1+ candidate to compare