Thread: tone control
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Old 10-25-2009, 12:06 PM
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Reece Reece is offline
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Not sure which 45X you have, NostalgiaAir lists a number of them with suffixes. The first one is a small table model with 4" speaker.

The simplest kind of tone control is a "losser" type which just cuts high frequencies, thus making lower frequencies sound louder. It doesn't actually boost the bass. A 4" speaker can't handle bass anyway. However, you can try this: tack a small cap (like .001mfd.) from the grid of the first audio tube to chassis ground and try it. Experiment with larger and larger caps until you find the one you like. Bear in mind that if too large it will cut too much treble and you could get into a situation where you have to turn up the volume to hear the set and the speaker could be overtaxed.

Reece
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