I recently scored a second Chicago BO-2 push-pull output transformer. The “Bx-x” series is their “full fidelity” line aimed at broadcast and studio applications (30-15k, according to the case; 30-20k in the catalog). Never seem to hear much about these guys. I seem to recall that the BO-2 was used in the CCA LA-1 limiter, but I haven’t heard of any other vintage units that used Chicago transformers. I’ve not yet tested these beyond frequency response and primary inductance measurements, so no clue how they sound.
Anyone know what other classic (or even classic in the Edsel sense) units may have used Chi Std?
Anyone know what other classic (or even classic in the Edsel sense) units may have used Chi Std?