Vactrol LDR for Phasor Circuits

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Vactrol LDR for Phasor Circuits

Music Man Amps Discussion Forum » Solid State Devices & Substitutions » Vactrol LDR for Phasor Circuits

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 Steve Kennedy (admin)
Username: admin
Registered: 03-2002
Posted on Saturday, May 07, 2005 - 05:47 pm:   

Here is a link to Newark Electronics who sells replacements for the Vactrol LDR/Opto-isolators used in the 75 & 150 series amps. These would probably would work in the RP series as well.Newark Electronics: VTL5C
Steve
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Ewan Milne Tytler
Music Man Equipment
Music Man 110RD fifty
Music Man 112RD sixty-five
Two OLP MM4 Silhouettes with Lace Sensors

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6 years 9 months

Emtytler Tue, 12/11/2018 - 12:17

I’d like to revive this thread. I’m looking for LDRs for a RP100. These are listed as “VTL504” on the schematic. I can find absolutely nothing about them. It looks like VTL5C LDRs for the HD150 are available from many sources. The HD150 schemetic lists these as “VTL5C” but there are VTL5C1-5C4 versions of this. Does anybody know which one in the best replacement? Would these actually work in the RP100? Ewan

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Raph
Music Man Equipment
112rp65

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9 months 4 weeks

112rp65 Thu, 03/21/2024 - 15:44

Hi Erwan,
I know it's a really old question but those VTL504 may just be a MM nickname for VTL5c4/2 (they have 5 PINs like the one we have in our beloved RP100 / RP65, and the schematics would fit too... It's just a question of value then) and the name is close enough. Note that I may unsolder the one in my RP65 in the next months and try to see if the reference is on the back of the component.
Raph