Another angle: Could this be a mix-up with another text? For example, "Ravana Samhita" might be a different text. Or perhaps the user is thinking of tantric texts that reference Ravana. For example, there are rituals or hymns in certain tantras that mention Ravana. Maybe the user is confused and thinks such a text exists when it doesn't in the traditional sense.

The term "Tantratmak Ravan Samhita" does not correspond to any widely recognized or authentic Hindu or tantric text in mainstream traditions. Here’s a breakdown of your query and suggestions for next steps: