Perkin-Elmer Vactrol Catalog and Applications
Posted: Tue Oct 13, 2015 9:53 pm
Found a copy of the now-discontinued line of Vactec, (aka EG&G, Perkin-Elmer, Excelitas) Vactrols.
Though Excelitas, the newest owner of Vactec has discontinued the Vactrol line, this catalog has an abundance of resources for those using NOS Vactrols, performing repairs or using current production optocouplers from Silonex or Coolaudio.
Photoconductive Cells and Analog Optoisolators, Perking Elmer Optoelectronics, 2001: https://www.proaudiodesignforum.com/ima ... atalog.pdf
Correct Vactrol VTL5C3 Resistance versus LED current. The VTL5C3 datasheet table has an error for on resistance and should not be relied upon.
Chart from the Vactrol Catalog showing overlapping areas of LED emitter and CdS photocell spectral responses.
I've always wondered why newer Vactrols continued to use red LEDs when the spectral peak for most CdS cells are around 550 nm (yellow).
Updated November 14, 2018:
Silonex products are made by Luna: http://lunainc.com/product/optocouplers/
The NSL-32-034 looks similar to the VTL5C3 so commonly used: https://proaudiodesignforum.com/images/pdf/NSL-32.pdf
Coolaudio Semiconductor also make the VTL5C3: http://www.coolaudio.com/docs/COOLAUDIO ... ASHEET.pdf
Cabintech offer the Coolaudio VTL-series: https://cabintechglobal.com/?tab=semi
Tesla-Blatna Photocells: http://www.tesla-blatna.cz/en/products- ... c-elements
Link to earlier Clairex photocell data: https://www.proaudiodesignforum.com/for ... 431&p=4886
Though Excelitas, the newest owner of Vactec has discontinued the Vactrol line, this catalog has an abundance of resources for those using NOS Vactrols, performing repairs or using current production optocouplers from Silonex or Coolaudio.
Photoconductive Cells and Analog Optoisolators, Perking Elmer Optoelectronics, 2001: https://www.proaudiodesignforum.com/ima ... atalog.pdf
Correct Vactrol VTL5C3 Resistance versus LED current. The VTL5C3 datasheet table has an error for on resistance and should not be relied upon.
Chart from the Vactrol Catalog showing overlapping areas of LED emitter and CdS photocell spectral responses.
I've always wondered why newer Vactrols continued to use red LEDs when the spectral peak for most CdS cells are around 550 nm (yellow).
Updated November 14, 2018:
Silonex products are made by Luna: http://lunainc.com/product/optocouplers/
The NSL-32-034 looks similar to the VTL5C3 so commonly used: https://proaudiodesignforum.com/images/pdf/NSL-32.pdf
Coolaudio Semiconductor also make the VTL5C3: http://www.coolaudio.com/docs/COOLAUDIO ... ASHEET.pdf
Cabintech offer the Coolaudio VTL-series: https://cabintechglobal.com/?tab=semi
Tesla-Blatna Photocells: http://www.tesla-blatna.cz/en/products- ... c-elements
Link to earlier Clairex photocell data: https://www.proaudiodesignforum.com/for ... 431&p=4886