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Author Topic: Power curve on Radio Shack HTA-20  (Read 1639 times)
KF4WDF
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Posts: 2




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« on: December 24, 2005, 06:16:47 AM »

I recently picked up a used HTA-20 for use with my Icom W32A in the truck.

I was wondering if any one knows what the power curve is for this amp.

It states .5w min and 5 watts max for 30 watts.

Just curious what it really puts out at .5w and some points up to 5 watts.  

My power meter is on the fritz.

Thanks in advance, kf4wdf.
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KA5N
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Posts: 4380




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« Reply #1 on: December 24, 2005, 10:36:44 AM »

The HTA-20 is a class C amplifier not a linear amplifier and therefore doesn't have a "power curve."  The spec .5W to 5W means that it will put out the same power for any input between .5W and 5W.
FM doesn't require a linear amplifier. There may be some minor variation over the range and variation in output for different samples of the HTA-20.
For a linear amplifier one would expect to see the output track the input x gain pretty closely (or the amplifier wouldn't be linear).
I wouldn't worry too much about the output level.   The input power (volts X amps) times about 0.7 should approximate the output power.
Allen
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