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Problem in MAC MC240

Dear experts,

Recently my 240 has a big problem. The last power tube has lighted up as bright as a bulb. I have interchanged the tubes, still at that position the problem happened. Even I changee another set, still problem at there. Can anyone tell me some possible reasons?

Thanks a mil!!!
eugeneli

Showing 1 response by eugeneli

eugeneli OP
18 posts
 
Thanks to both. I'll have it check next week and in the meantime.......I can't enjoy the music from it :(.

To Chang. Finally I have all the tubes close to your recommendation, 4 RCA 7027a, 2 RCA blk plate 12BH7, 2 Telefunken 12AU7, and 3 Brimar 12AX7. I don't have 3 long plate Mullard 12AX7, but I have 4 idenitcal Brimar. When I put them on, sound good on my setup.

Thanks again.
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