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Post subject: Twin Reverb Light Issue
Posted: Sat Jan 24, 2015 6:40 am
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Hey guys,

I recently replaced the power tubes in my 65 TRRI, and now have noticed the front light is no longer illuminated. I took a plate voltage reading of 460, so biased as close as I could to 70%, so roughly 45ma.

I'm wondering if this could just be chance the bulb has gone, or if the bias is causing problems? I should mention I also put a 12AX7 in the PI at the same time.

Thanks

BlackFuzz


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Post subject: Re: Twin Reverb Light Issue
Posted: Sat Jan 24, 2015 6:57 am
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Front light bulb have nothing to do with anything else in the amp.

It is burn or have bad contact on socket , remove the bulb light , test it with meter ....


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Post subject: Re: Twin Reverb Light Issue
Posted: Sat Jan 24, 2015 7:05 am
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stratele52 wrote:
Front light bulb have nothing to do with anything else in the amp.

It is burn or have bad contact on socket , remove the bulb light , test it with meter ....


Ah, okay. I'd read elsewhere it was connected to the transformer or could be bad tubes. It was just worrying that it coincided with me changing the tubes.


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Post subject: Re: Twin Reverb Light Issue
Posted: Sat Jan 24, 2015 7:10 am
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BlackFuzz wrote:
[

Ah, okay. I'd read elsewhere it was connected to the transformer Right


or could be bad tubes. Wrong

Look at a shematic you'll see this make no sense :lol:

It was just worrying that it coincided with me changing the tubes. Sure




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Post subject: Re: Twin Reverb Light Issue
Posted: Sat Jan 24, 2015 7:17 am
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stratele52 wrote:
BlackFuzz wrote:
[

Ah, okay. I'd read elsewhere it was connected to the transformer Right


or could be bad tubes. Wrong

Look at a shematic you'll see this make no sense :lol:

It was just worrying that it coincided with me changing the tubes. Sure




I didn't think it could be the tubes, but it had me a little worried :lol:

I'll check the bulb, hopefully it's just an easy fix then.


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Post subject: Re: Twin Reverb Light Issue
Posted: Sat Jan 24, 2015 7:20 am
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+1 , yes easy to fix.


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