Rolling Candidates to replace 81

Rectifier — DHT — UX4

Drop-In Replacements

✓ CV2546✓ UX281✓ VT-81✓ 2935A

Top 10 Picks

Rolling Candidates (70)

Heater:

Fit:

Status:55 shown

2.5V Heater(3 candidates)

Tube	Status ↑	Pa	Ah	Fit
816	✓ Safe	—	2	adapter
82	✓ Safe	—	3	adapter
866A	✓ Safe	—	5	adapter

3.3V Heater(1 candidates)

	Tube	Status ↑	Pa	Ah	Fit
	3DG4	✓ Safe	—	3.8	adapter

4V Heater(5 candidates)

Tube	Status ↑	Pa	Ah	Fit
AZ31	✓ Safe	—	1.9	adapter
MU12	✓ Safe	—	2.5	adapter
UU4	✓ Safe	—	2.3	adapter
UU5	✓ Safe	—	2.3	adapter
UU6	✓ Safe	—	1.4	adapter

5V Heater(25 candidates)

Tube	Status ↑	Pa	Ah	Fit
274A	✓ Close	—	2	adapter
5R4	✓ Close	—	2	adapter
5C3S	✓ Safe	—	3	adapter
5C4S	✓ Safe	—	2	adapter
5CU4	✓ Safe	—	3.5	adapter
5T4	✓ Safe	—	2	adapter
5Ts4S	✓ Safe	—	1.5	adapter
5U4G	✓ Safe	—	3	adapter
5V4	✓ Safe	—	2	adapter
5X4	✓ Safe	—	3	adapter
5Y3	✓ Safe	—	2	adapter
5Y4G	✓ Safe	—	2	adapter
5Z3	✓ Safe	—	3	adapter
5Z3P	✓ Safe	—	3	adapter
673	✓ Safe	—	10	adapter
80	✓ Safe	—	2	adapter
83	✓ Safe	—	3	adapter
83V	✓ Safe	—	2	adapter
872A	✓ Safe	—	7.5	adapter
GZ30	✓ Safe	—	2	adapter
GZ31	✓ Safe	—	2	adapter
GZ32	✓ Safe	—	2	adapter
GZ33	✓ Safe	—	3	adapter
GZ34	✓ Safe	—	1.9	adapter
GZ37	✓ Safe	—	2.8	adapter

6.3V Heater(14 candidates)

Tube	Status ↑	Pa	Ah	Fit
6AU4	✓ Safe	6.5W	1.8	adapter
6AX4	✓ Safe	5W	1.2	adapter
6W4	✓ Safe	3.5W	1.2	adapter
6325	✓ Safe	—	2.7	adapter
6754	✓ Safe	—	1	adapter
6AX5	✓ Safe	—	1.2	adapter
6AX6-G	✓ Safe	—	2.5	adapter
6BW4	✓ Safe	—	0.9	adapter
6BY5	✓ Safe	—	1.6	adapter
6V3	✓ Safe	—	1.75	adapter
6W5-G	✓ Safe	—	0.9	adapter
7Z4	✓ Safe	—	0.9	adapter
EZ80	✓ Safe	—	0.6	adapter
EZ81	✓ Safe	—	1	adapter

12.6V Heater(2 candidates)

	Tube	Status ↑	Pa	Ah	Fit
	12D4	✓ Safe	5.5W	0.6	adapter
	12AX4	✓ Safe	—	0.6	adapter

16.8V Heater(1 candidates)

	Tube	Status ↑	Pa	Ah	Fit
	17AX4	✓ Safe	5.3W	0.45	adapter

18.9V Heater(1 candidates)

	Tube	Status ↑	Pa	Ah	Fit
	19AU4	✓ Safe	6W	0.6	adapter

22.4V Heater(1 candidates)

	Tube	Status ↑	Pa	Ah	Fit
	22DE4	✓ Safe	6.5W	0.45	adapter

25V Heater(2 candidates)

	Tube	Status ↑	Pa	Ah	Fit
	25DK3	✓ Safe	9W	0.45	adapter
	25AX4	✓ Safe	—	0.3	adapter

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