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The fact is, Your Texas star already is class C. Ever notice after you talk on it for awhile, it seems to produce a lil more power than it did when it was cold. The reason for this is, the bias circuit is not thermally tracked/corrected.

We all learned in high school that electrons move more freely when the medium heats up. Well, because the bias in these amplifiers is nothing more than a resistor, with no diode regulated power supply, The resistor heats up and begins to change value.

This in turn causes the bias supply voltage to drop from the AB region into class C.

So, if you want to convert your Texas Star 500 into class C, just talk on it for about 5 minutes until shes nice and hot......then watch the smoke roll(PUN INTENDED)!

[QUOTE="dxhound, post: 397445, member: 2167"] The fact is, Your Texas star already is class C. Ever notice after you talk on it for awhile, it seems to produce a lil more power than it did when it was cold. The reason for this is, the bias circuit is not thermally tracked/corrected. We all learned in high school that electrons move more freely when the medium heats up. Well, because the bias in these amplifiers is nothing more than a resistor, with no diode regulated power supply, The resistor heats up and begins to change value. This in turn causes the bias supply voltage to drop from the AB region into class C. So, if you want to convert your Texas Star 500 into class C, just talk on it for about 5 minutes until shes nice and hot......then watch the smoke roll(PUN INTENDED)! [/QUOTE]

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