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You might try using the lm-723 regulator that the motorola bias scheme uses as I did and a small variable resistor.

I use transistors minus one leg for thermal tracking on the heat sink by each transistor(pill) paralleled for more efficient tracking. I can find the actually tranny #'s if you like.

Forgot to mention the bias scheme I used was designed by bob85 and was directly modeled after a motorola bias scheme.

Here is the circuit in question and more on the subject via the reading...... http://www.worldwidedx.com/home-brew-mods/31641-switchable-biasing-bob85-style.html

<blockquote data-quote="mackmobile43" data-source="post: 158408" data-attributes="member: 6232">You might try using the lm-723 regulator that the motorola bias scheme uses as I did and a small variable resistor.I use transistors minus one leg for thermal tracking on the heat sink by each transistor(pill) paralleled for more efficient tracking. I can find the actually tranny #&#039;s if you like.Forgot to mention the bias scheme I used was designed by bob85 and was directly modeled after a motorola bias scheme.Here is the circuit in question and more on the subject via the reading......&nbsp;&nbsp; <a href="http://www.worldwidedx.com/home-brew-mods/31641-switchable-biasing-bob85-style.html" target="_blank">http://www.worldwidedx.com/home-brew-mods/31641-switchable-biasing-bob85-style.html</a><img src="http://i5.photobucket.com/albums/y152/ukmudduck/bias%20board/P1010066.jpg" alt="" class="fr-fic fr-dii fr-draggable " data-size="" style="" /></blockquote>

[QUOTE="mackmobile43, post: 158408, member: 6232"] You might try using the lm-723 regulator that the motorola bias scheme uses as I did and a small variable resistor. I use transistors minus one leg for thermal tracking on the heat sink by each transistor(pill) paralleled for more efficient tracking. I can find the actually tranny #'s if you like. Forgot to mention the bias scheme I used was designed by bob85 and was directly modeled after a motorola bias scheme. Here is the circuit in question and more on the subject via the reading...... [URL]http://www.worldwidedx.com/home-brew-mods/31641-switchable-biasing-bob85-style.html[/URL] [IMG]http://i5.photobucket.com/albums/y152/ukmudduck/bias%20board/P1010066.jpg[/IMG] [/QUOTE]

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