This Module is currently available.
Dual multi-mode transistor ladder filter
A classic transistor ladder filter with added High Pass and Band Pass modes (12 dB/oct) in addition to the usual 24 dB/oct Low Pass mode. It is dual filter tuned for stereo operation like the FUN VCF so the FM input and FM Input attenuverter affect both halves of the filter equally.
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These merchants probably sell this module. Huh?