I will get a video at some point today. I feel like the sound is definitely different with the boost on full and the master at half than with the master on full and the boost at half. Looking at it on paper, i know that doesn't track but into a loud amp it def feels diff. I'm not running back to do it to all the other rangemaster's I've built or anything, but it was a VERY easy experiment. Like i mentioned, I intend to bring the bias knob out front as well and have the most tweakable treble booster I can. It's crazy that such a small and basic circuit can do so much to your sound. Germanium breakup sounds more natural and amp like to my ear than anything else ive tried. In a perfect world when i can run my amp at it's sweet spot i don't really need it, but if the soundman wants lower stage volume, it's an irreplaceable tool for me to get the amp to behave like i want it to at a much larger range on the volume knob. I'm generally running into old fenders and other single channel amps looking for that "edge of breakup" thing we are all so in love with. a good germy booster lets me get stage sounds out of my champ at 2-3 at the house. Keeps me from getting yelled at.
anecdotally: I have been in the studio once or twice a month during lockdown working on a record. We used a chickenhead to fix a lot of muffled tones (my bandmates casino is a constant challenge) and the producer/engineer dug the function so much he asked me to make him one and took 100 bucks off our day rate in trade. Most of my guitar player buddies who have tried using a rangemaster variant up front in their chain have them on their boards perm now. If you haven't tried one you should. Shits like 8 parts and a 10 dollar NPN transistor (that's the high end too) just make sure you snatch something in that 75-95 HFE gain range. Cooler works as expected. Hotter tends to sound like garbage. I skipped over them for years because "treble booster" is bad marketing. As a tele player, i figured i had all the treble i needed. That's not what they do. They make everything sparkle. I run a lot of diff gain boxes and everyone of them sounds worse with the booster turned off.
I made a batch of 5 earlier this year. If you tilt the board and angle it down a little towards the switch, you can fit them in the little 1590b with top jacks (find a good template for the jacks and power, you gotta be accurate, AND use the smaller DC jack)
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