McMartin LR-1009 Can We Fix It and what the Heck is it Anyway

[@MervinGriff]

From Sound & Communications magazine April 1981 "An automatic level controller, Model LR-1009, automatically adjusts the level of background music or a page announcement, depending on the changing level of extraneous noise in the area. The rectified and integrated sensing signal provides AGC voltage for the two independent adjustable attack and release functions. A dual- mode function switch provides continuous expansion adjustment during paging or can "freeze" the gain setting during the page announcement. The unit operates on 120 volts 50/60 Hz or 24 volts DC."

[@AERVBlog]

Cool, thanks. And it still works too.

[@MrVinamp]

What are those silver boxes on the pcb?

[@AERVBlog]

Those are input transformers. Strange layout though. They are more like an auto-transformer than an normal one. Thanks for watching.

[@t1d100]

👍

[@AERVBlog]

TNX

[@armansentina-gz7yo]

I'm half male half female I like old diy amplifier

[@AERVBlog]

Ahh. Very good. Thanks for watching. I hope you are subscribed. Keep on DIYing. We need folks building and repairing their own stuff.

[@AstrosElectronicsLab]

@@AERVBlog I think they meant they are LIKE an old DIY amplifier (made of bits and pieces everywhere).

[@AstrosElectronicsLab]

Nope and... nope. To answer you're last two questions.

[@AERVBlog]

Lol. Kinda figured I would get that response.

[@AstrosElectronicsLab]

@@AERVBlog new sub btw

[@AERVBlog]

@@AstrosElectronicsLabthank you and welcome.

[@AERVBlog]

Me too.​@@AstrosElectronicsLab