Modulating VCRs?

[Chip Chester]

Although not clearly stated, I believe the OP is pursuing a VCR that will accept a baseband video input (with Macrovision) and modulate it on the RF output without the Macrovision signal included... Signal would be passed on to a TV set for a 'more stable' display, or to another VCR for recording via RF in. Mod/demod to defeat MV. Some early decks apparently discarded and rebuilt the vertical interval, defeating the AGC-influencing versions of Macrovision.

The degradation of RF-RF dubbing remains an issue, though.

My apologies if I misinterpreted the OP's intent...

on edit... yup, like he said above me...

Chip