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Author Topic: Matched Tubes?  (Read 937 times)

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Offline adydula

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Matched Tubes?
« on: February 27, 2018, 12:01:50 PM »
I think I know the answer but want to make sure...

Are tightly matched tube 6c45p's necessary or desireable in the Mainline?

or

Is the circutry able to bias the tubes with the pot's well enough for good operation?

Thanks
Alex
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Offline fullheadofnothing

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Re: Matched Tubes?
« Reply #1 on: February 27, 2018, 12:37:05 PM »
Quote from: adydula on February 27, 2018, 12:01:50 PM

Is the circutry able to bias the tubes with the pot's well enough for good operation?

p. 74
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Joshua Harris

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Offline adydula

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Re: Matched Tubes?
« Reply #2 on: February 28, 2018, 01:28:39 AM »
Thanks Josh...

I guess as a tube ages the more these pots might be tweaked until you can get them to the correct voltage for "optimum" performance.
Thanks again, looking forward to my build!

Alex
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Offline Paul Joppa

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Re: Matched Tubes?
« Reply #3 on: February 28, 2018, 04:22:52 PM »
Normally, with most tubes, there will be some drift over the first 100 hours or so, then the bias drift will be fairly slow as long as the item is in regular use.
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Paul Joppa
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