Columbia dictaphone feedscrew

[jdc1]

Hi to all,I purchased a Columbia dictaphone,belt drive with an electric motor.It came with a Columbia Lyric 4min reproducer & the carriage looks more like a BK carriage.My question is if I will be able to play either 2min celuoid or 4min celuoid cylinders with the existing feedscrew & halfnut? It appears to be the same length as a BF feedscrew.Any help would be appreciated.Thanks,John in Cape Coral,FL.

[edisonphonoworks]

The Dictaphone machines are 160 tpi, Ediphones at 150 tpi so are not able to play two or four min cylinders. It might be possible to have a two and four minute feed screw and half nut made.