I've got a UTC LS-39 & a LS-37 input transformers. I've seen all the specs from the UTC catalogs, photocell input. My question is this, Does anyone have an actual schematic using this iron? Would this have been found in a movie theater amplifier? What manufacturer would have used an LS-39 in their products? I get 3500H for the LS-39 and 2400H for the LS-37 for the primary. 3500H has an X value like a 470K resistance at 20 Hz. I'm assuming the Hi Z side would be the input from a photocell? This would then go to the 600 ohm output to a regular amplifier circuit? But I'd like to see this in an actual application.
Vacuum Tube Manual: RCA Phototubes 1941 : Free Download, Borrow, and Streaming : Internet Archive
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The 600r means this was used when sound-head was FAR from the amplifier, such as a very large theater. There would be a line-to-grid transformer at the amplifier.
These could be bang-up DIs for guitar interfacing to long lines. Otherwise I don't see much use.
scroll down, get the PDF
The 600r means this was used when sound-head was FAR from the amplifier, such as a very large theater. There would be a line-to-grid transformer at the amplifier.
These could be bang-up DIs for guitar interfacing to long lines. Otherwise I don't see much use.
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