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I don't know why you couldn't modulate transistors biased above class C but can see it being very inefficient. I don't know enough about the subject to back up that statement.

Here is the info I mentioned in the other thread about modifying the bias circuit for class C. Just grounding L40 and L43. I never tried this to see if the modulator would run cooler with the 148.

[ATTACH=full]19128[/ATTACH]

https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.bargainxchange.com/Asymod/manuals/Asymod%20III%20Installation%20Manual.pdf&ved=0ahUKEwjsxNjQ6-nPAhWEQyYKHTliA9UQFghGMA0&usg=AFQjCNEoNf2ZRkUOg4f6nXXGrzuoihRDAA&sig2=ZlqQb9Xs4XQi6vgR_2D1Cw

I mentioned in the other thread the mauldulator* heatsink would run 170 degrees on the 148 and barely gets warm with a 29. When I switched to the 29 the carrier control on the modulator had to be turned up a significantly more to achieve the same carrier. My thoughts are the final and driver in the 29 being class C need a little more push because there is no bias supply...to be fair it's also a different final and circuit.

<blockquote data-quote="543_Dallas" data-source="post: 566528" data-attributes="member: 21044">I don&#039;t know why you couldn&#039;t modulate transistors biased above class C but can see it being very inefficient. I don&#039;t know enough about the subject to back up that statement.Here is the info I mentioned in the other thread about modifying the bias circuit for class C. Just grounding L40 and L43. I never tried this to see if the modulator would run cooler with the 148.[ATTACH=full]19128[/ATTACH]<a href="https://www.google.com/url?sa=t&amp;source=web&amp;rct=j&amp;url=https://www.bargainxchange.com/Asymod/manuals/Asymod%2520III%2520Installation%2520Manual.pdf&amp;ved=0ahUKEwjsxNjQ6-nPAhWEQyYKHTliA9UQFghGMA0&amp;usg=AFQjCNEoNf2ZRkUOg4f6nXXGrzuoihRDAA&amp;sig2=ZlqQb9Xs4XQi6vgR_2D1Cw" target="_blank">https://www.google.com/url?sa=t&amp;source=web&amp;rct=j&amp;url=https://www.bargainxchange.com/Asymod/manuals/Asymod%20III%20Installation%20Manual.pdf&amp;ved=0ahUKEwjsxNjQ6-nPAhWEQyYKHTliA9UQFghGMA0&amp;usg=AFQjCNEoNf2ZRkUOg4f6nXXGrzuoihRDAA&amp;sig2=ZlqQb9Xs4XQi6vgR_2D1Cw</a>I mentioned in the other thread the mauldulator* heatsink would run 170 degrees on the 148 and barely gets warm with a 29. When I switched to the 29 the carrier control on the modulator had to be turned up a significantly more to achieve the same carrier. My thoughts are the final and driver in the 29 being class C need a little more push because there is no bias supply...to be fair it&#039;s also a different final and circuit.</blockquote>

[QUOTE="543_Dallas, post: 566528, member: 21044"] I don't know why you couldn't modulate transistors biased above class C but can see it being very inefficient. I don't know enough about the subject to back up that statement. Here is the info I mentioned in the other thread about modifying the bias circuit for class C. Just grounding L40 and L43. I never tried this to see if the modulator would run cooler with the 148. [ATTACH=full]19128[/ATTACH] [URL='https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.bargainxchange.com/Asymod/manuals/Asymod%2520III%2520Installation%2520Manual.pdf&ved=0ahUKEwjsxNjQ6-nPAhWEQyYKHTliA9UQFghGMA0&usg=AFQjCNEoNf2ZRkUOg4f6nXXGrzuoihRDAA&sig2=ZlqQb9Xs4XQi6vgR_2D1Cw']https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.bargainxchange.com/Asymod/manuals/Asymod%20III%20Installation%20Manual.pdf&ved=0ahUKEwjsxNjQ6-nPAhWEQyYKHTliA9UQFghGMA0&usg=AFQjCNEoNf2ZRkUOg4f6nXXGrzuoihRDAA&sig2=ZlqQb9Xs4XQi6vgR_2D1Cw[/URL] I mentioned in the other thread the mauldulator* heatsink would run 170 degrees on the 148 and barely gets warm with a 29. When I switched to the 29 the carrier control on the modulator had to be turned up a significantly more to achieve the same carrier. My thoughts are the final and driver in the 29 being class C need a little more push because there is no bias supply...to be fair it's also a different final and circuit. [/QUOTE]

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