I recently acquired an Akai AT-550 tuner, circa 1973. All four dial lamps are blown. They are 6v 150ma fuse lamps, but I cannot find these anywhere. The closest matches I can find are 6.3v 250ma and 6v 250ma lamps.
What would be the impact of using the wrong amperage lamps? I’m thinking in terms of:
- Danger in that it might cause an electrical failure or fire through excess heat.
- Danger in jeopardising the life of the tuner and components.
- Will it simply reduce the life of the fuse lamps themselves so that they will need more frequent replacement?
Bear in mind that I will probably only use the tuner once a month for a period of maybe 1-2 hours max. Is it safe to use those 250ma rated lamps?
There is a 12v 150ma version I have found also. But that might be too much of a jump?
I also have some 8v 250ma lamps from a Marantz receiver. Would they be safe?