Flickering Marantz 250 Bulbs

[EFelz]

I think this might be notorious for this older model Marantz 250. The meter bulbs are constantly flickering. I've cleaned the sockets with de-ox but does not help much. Does anyone have any tips? Or maybe an LED conversation?

 

[Raccoon1400]

Do you hear any crackling coming from the power switch? Does the unit work well otherwise?

An arcing power switch could cause flickering lights.

 

[fredmarantz]

Flickering lamps in a 250 is a very common misbehavior og relates to bad contact between the lamp socket and the lamp itself. The only way to fix that is to make sure there is good contact - so cleaning - as you did already and tight fit is the way to go - if you want to keep the lighting original. I have 5 x 250's and all of them , at some point have shown that phenomenon. I did the recommended stuff and it fixed the problems. BUT - still they are able to exhibit the flickering after a while and here we go again. The 250 is a great amp, but that lamp-flickering can be a PITA.
If it is a bad powerswitch - all the lamps should flicker simultaniously. Could be, off course, but i doubt.

Btw: A stock 250 has no powerswitch - it can be switched through the pre-amp og directly from the wall.

regards
freddy

 

[bryans12v]

I would make sure the bulbs are clamped in the bulb holders tightly. They have a tendency to widen which makes poor contact.

You can check by seeing how freely the bulb moves within the holder. If so, take them out and gently crush them together