Amp/Preamp Asylum

AI Modulus M3a Gain Switch, and Cap bypass switch ??

172.9.116.164

Ross

I just picked up and M3a.

I can not find the Hi/Lo gain switch or the Cap Bypass switch.

Where are the switches located on the circuit board ?

Thanks,

Ross

Follow Ups:

RE: AI Modulus M3a Gain Switch, and Cap bypass switch ?? - wheezer 10:50:00 01/03/17 (0)
The M3 has Bourns conductive plastic attenuators. M3A has Elma stepped attenuators.
The two pots track differently.
Found them--Thanks- but - Ross 18:04:57 12/24/16 (1)
I have 4 dip switches, 2 per side, with 2 positions for each switch. All switches are labeled on-off for hi-lo gain. Appears I do not have cap bypass switches. In addition, I do not have ceramic tube sockets.

My switches are located just to the right of center, towards the back of the circuit board. They are small, and were more visible in stronger light...

At hi gain, acceptable volume is about 12:00. There is a significant gain difference between the M3 and M3A. Listening level in my M3 is about 9:30-10:00.

Thanks,

Ross
- RE: Found them--Thanks- but - Awe-d-o-file 05:37:14 12/25/16 (0)
  Sorry. A call or email to AI is in order then. Lots of good info on their site too. I would prefer the gain settings where 12 oclock was good over 9. Good FAQs on AI'sa page regarding lots of stuff. Good luck.
  
  ET
  
  "If at first you don't succeed, keep on sucking till you do suck seed" - Curly Howard 1936
You need the owners manual - Awe-d-o-file 05:36:44 12/24/16 (11)
But I don't understand you not finding them, they are right next to the line stage tubes the logical place they would be. I guess you are looking for a slide switch but they are DIP switches. Join hi-fi engine and download the manual free. All is explained. Manual good. Google is friend.

ET

"If at first you don't succeed, keep on sucking till you do suck seed" - Curly Howard 1936

Edits: 12/24/16 12/25/16
- Some are different - kavakidd 15:06:18 12/24/16 (6)
  mine only have two switches each. Bypass but no gain - sadly
  "Man is the only animal that blushes - or needs to" Mark Twain
  - A 3A? - Awe-d-o-file 16:20:13 12/24/16 (5)
    Must have been an early run. Dip switch right? Gain and cap bypass all in the same DIP.
    
    ET
    
    "If at first you don't succeed, keep on sucking till you do suck seed" - Curly Howard 1936
    
    Edits: 12/24/16
    - YUP - kavakidd 22:49:39 12/24/16 (4)
      And it shows in the manual - 2004- not "that" early is it?
      "Man is the only animal that blushes - or needs to" Mark Twain
      - RE: YUP - Awe-d-o-file 05:39:02 12/25/16 (3)
        
        In Reply to: RE: YUP posted by kavakidd on December 24, 2016 at 22:49:39
        
        No they started making that in about 96 I think. Based on the OP's reply and yours it seems things were variable......
        
        ET
        
        "If at first you don't succeed, keep on sucking till you do suck seed" - Curly Howard 1936
        
        I know that but the date - kavakidd 10:47:39 12/25/16 (2)
        
        In Reply to: RE: YUP posted by Awe-d-o-file on December 25, 2016 at 05:39:02
        
        "2004" is printed on a tag inside
        "Man is the only animal that blushes - or needs to" Mark Twain
        
        RE: I know that but the date - Awe-d-o-file 20:24:22 12/25/16 (1)
        
        In Reply to: RE: I know that but the date posted by kavakidd on December 25, 2016 at 10:47:39
        
        yes i saw you said that. i guess they made unpublished changes. did you buy it new or might it have been modded before you got it?
        
        ET
        
        "If at first you don't succeed, keep on sucking till you do suck seed" - Curly Howard 1936
        
        Bought used but - kavakidd 23:25:29 12/25/16 (0)
        
        In Reply to: RE: I know that but the date posted by Awe-d-o-file on December 25, 2016 at 20:24:22
        
        but no indication that it had been modded - would make no sense either.Replaced a 3 bought new
        "Man is the only animal that blushes - or needs to" Mark Twain
        
        Edits: 12/25/16
- "Manual good. Google is friend." - 1973shovel 13:20:31 12/24/16 (3)
  Excellent advice and mighty straight shootin' there, Tonto!
  - RE: "Manual good. Google is friend." - Awe-d-o-file 16:21:14 12/24/16 (2)
    Thank you Mr Silverheels! Have em Merry Christmas
    
    ET
    
    "If at first you don't succeed, keep on sucking till you do suck seed" - Curly Howard 1936
    - Silver Heels sound better - 1973shovel 05:47:24 12/25/16 (1)
      It's a well known fact.
      
      They also serve to better ground you in the event you're foolish enough to float your equipment's ground. [nudge nudge, wink wink]
      
      You have em Merry Christmas too, Kemosabe!
      - RE: Silver Heels sound better - Awe-d-o-file 15:27:51 12/25/16 (0)
        
        In Reply to: RE: Silver Heels sound better posted by 1973shovel on December 25, 2016 at 05:47:24
        
        I float all 5 of my ham shack antennas. Ayres Hansen said safety ground is a noise antenna. McGowan of PS audio told me to lift the P-300 safety ground. Big improvement.
        
        ET
        
        "If at first you don't succeed, keep on sucking till you do suck seed" - Curly Howard 1936

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