I recently got my hands on a decent handful of BC107s, 108s and a few 109s, all C-bin although i haven't gone through and measured the β on any of them, i'd like to build one or two 73 style pres with the 109s and maybe a couple 66s with the 108s, but i've run into a bit of a roadblock regarding transformers, OT's specifically, i'm looking at both Lundahl's lineup as well as OEP at the moment as they're the most readily available to me, but i can't really seem to find a decent match for the elusive LO1166, and i frankly can't find a whole lot of info on it, it's also not particularly well specified how it is applied in the schematics i've been able to find, anyone here have any experience with the things? I've found CJs notes on them that give plenty of info on the specs, but i can't necessarily find a good match, what's common to use in modern clones, i've also stumbled upon the Carnhill VTB1847 but those seem to be almost equally well documented/available, would i have to roll my own, so to speak?
Also what's with the gap? I don't know much about transformers but from the little i know i've read about gapping being used to increase current handling before saturation, does this serve the same purpose or is it something else, and is it critical? I'm a bit on the broke side at the moment so any advice about how i could proceed without spending hundreds on iron would be highly appreciated.
Also what's with the gap? I don't know much about transformers but from the little i know i've read about gapping being used to increase current handling before saturation, does this serve the same purpose or is it something else, and is it critical? I'm a bit on the broke side at the moment so any advice about how i could proceed without spending hundreds on iron would be highly appreciated.
