Looking for replacement 24v voltage regulator for MX113

[Ethan Pierce]

I have emailed McIntosh but they have not gotten back to me and I cannot find any information anywhere on the internet. the part number is M 065 7726 and the Q201 on the schematic. Anyone have any experience replacing this part?

 

[jek57]

Try Audio Classics they might be able to help you ...I have a Mx113 as well great preamp tuner

 

[MACKIE1975]

Try this: https://www.mouser.com/Search/Refine?Keyword=2N3504

 

[Ethan Pierce]

Try this: https://www.mouser.com/Search/Refine?Keyword=2N3504

Hmm I don't know much about voltage regulators but this one looks to be different than 24v

 

[Ethan Pierce]

Try Audio Classics they might be able to help you ...I have a Mx113 as well great preamp tuner

I will try! I actually bought my Thiels from them a couple years ago, good thinking!

 

[MACKIE1975]

Here it is: https://www.mouser.com/Search/Refine?Keyword=2N4231

 

[Ethan Pierce]

Here it is: https://www.mouser.com/Search/Refine?Keyword=2N4231

Ahhh not-stocked. I guess I'll keep looking around

 

[CruzBay]

I'm not the guy you'd trust to answer this, but if the goal is 24 volts at the emitter, couldn't you just put a 24 volt regulator using the collector's 34 volts as a source?

(Good thing Chris isn't around, I'd get hammered for this heresy)

https://www.jameco.com/z/L7824CV-ST...IC-24V-1500mA-3-Pin-3-Tab-TO-220_1991707.html

Patrice; why wouldn't this work?

Mike

 

[Ethan Pierce]

Ok, I may have this all wrong. The regulators may be ok but the actual diode supplying the 24v may be shot. I will test tonight.

For anyone reading the this in the future: hello from the distant past!!!!
And the voltage regulator is the thing that looks like an output transistor and the 24v diode can be replace with any 1-watt 24
volt zener diode.