A Secret Sorrow By Karen Van Der Zee Pdf File there. For best life with sweep tube finals, load quickly to rated input and then reduce the input slightly by reducing drive level. Screen grid current soars under high drive/light loading conditions and the screen grid is the most fragile element in most sweep tubes. Marc, In addition to minimizing tune-up time and out of resonance high plate current it is also very important to keep the final properly loaded. After that, you have to go to pretty large carriers sucking lotsa juice to make a difference. That first 10 to 12 db in your cb is where the action is. No one would ever notice the difference on air anyways. I ordered a reprint of the users manual and that appears to fit the Mars. The 101, I'm not so sure what the highest input rating is. In my gsb 201, we went from bout 125 watts carrier to 225 making that swap, but the transformer/572B's in the 201 is capable of being loaded to 1000 ma for short times. At that voltage level, 572B's r damn near indestructable. The only real benefit you'll see is not having to worry about the tubes.
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