Toggle sidebar Toggle sidebar
  • You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.

Turner JM+2/U (M+2) Schematic Needed or Internal Photo

SuperLid

SuperLid

Sr. Member
Feb 6, 2020
1,381
1,451
173
NY/NJ
I am unable to locate the schematic, or internal photo, of the M+2/U that uses ONE DARLINGTON transistor. I found the schematic of the version that uses two discrete devices. That is NOT what I am in need of. The unit I have, uses a single 2N5306 device, for amplification.

Thanks,

SL
 

If it was that easy, I would not have posted here. It seems like I may have the only one of these on the planet.

I need the schematic or internal photo of.. JM+2/U or M+2/U single transistor. NOT +2

SL
 
SL,
I worked on a single transistor M+2U and that was the schematic I used as I did not have one for it either and it worked well enough to get me there. A pic of the mic is attached but I did not take it for the parts detail. It was to show the owner that the element was in good shape overall as someone had taken it apart previously. The area of the board nearest the mic cord has the same parts as the B25396 "Circuit Board Assembly" in the schematic and the lower part where you can see the 4.7 cap is the same as the POT "potentiometer” part of the schematic. Sorry it’s not exactly as you wanted, just trying to help here. Maybe you could let me know what detail you needed and I may be able to help you further.

20250617_152536.jpg
 
Lkaskel said:
SL,
I worked on a single transistor M+2U and that was the schematic I used as I did not have one for it either and it worked well enough to get me there. A pic of the mic is attached but I did not take it for the parts detail. It was to show the owner that the element was in good shape overall as someone had taken it apart previously. The area of the board nearest the mic cord has the same parts as the B25396 "Circuit Board Assembly" in the schematic and the lower part where you can see the 4.7 cap is the same as the POT "potentiometer” part of the schematic. Sorry it’s not exactly as you wanted, just trying to help here. Maybe you could let me know what detail you needed and I may be able to help you further.

View attachment 75899
Click to expand...
Larry, we are getting there. Someone was in the mic and I Need to see one. any chance you have a photo with the switch connections? The orientation of the transistor in your photo helps. Someone before me, installed a MPSA13, that has a different pinout, than the 2N5306, but they neglected to account for that.

One other thing, that is throwing me off, is that there was a label in the battery compartment area, that showed the polarity as positive on the right, like a 2 transistor version. The mic draws a lot of current if I connect the polarity as shown. Something tells me, that this is incorrect and should be reversed. Do you know if positive is on the left in this version?

Thanks,

SuperLid
 
Last edited:
SuperLid said:
Larry, we are getting there. Someone was in the mic and I Need to see one. any chance you have a photo with the switch connections? The orientation of the transistor in your photo helps. Someone before me, installed a MPSA13, that has a different pinout, than the 2N5306, but they neglected to account for that.

One other thing, that is throwing me off, is that there was a label in the battery compartment area, that showed the polarity as positive on the right, like a 2 transistor version. The mic draws a lot of current if I connect the polarity as shown. Something tells me, that this is incorrect and should be reversed. Do you know if positive is on the left in this version?

Thanks,

SuperLid
Click to expand...
Ok, so the other pics I took are attached. I hope they help!!! I had returned this mic so I cannot get any other pics for you.
 

Attachments

  • 20250617_152503.jpg
    20250617_152503.jpg
    1.1 MB · Views: 7
  • 20250617_152601.jpg
    20250617_152601.jpg
    1.1 MB · Views: 7

dxChat
Help Users
  • No one is chatting at the moment.
  • @ 357:
    holy man no activity or what?
  • dxBot:
    357 has left the room.
  • @ Hambones amps:
    Does anyone know if you can replace the 2290 in a galaxy dx 93t twin turbine with a 2sc2879 red dot? If so, what would have to be tuned?
  • @ BayouRadioAmplifier:
    hello


      Top Bottom