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

172.9.116.164

Posted on December 23, 2016 at 14:32:17

Ross
Audiophile

Posts: 1814
Joined: January 24, 2000

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

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

wheezer

10:50:00 01/03/17

Found them--Thanks- but

Ross

18:04:57 12/24/16

RE: Found them--Thanks- but

Awe-d-o-file

05:37:14 12/25/16

...

Show full thread outline!

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

wheezer

10:50:00 01/03/17

Found them--Thanks- but

Ross

18:04:57 12/24/16

RE: Found them--Thanks- but

Awe-d-o-file

05:37:14 12/25/16

You need the owners manual

Awe-d-o-file

05:36:44 12/24/16

Some are different

kavakidd

15:06:18 12/24/16

Awe-d-o-file

16:20:13 12/24/16

kavakidd

22:49:39 12/24/16

Awe-d-o-file

05:39:02 12/25/16

I know that but the date

kavakidd

10:47:39 12/25/16

RE: I know that but the date

Awe-d-o-file

20:24:22 12/25/16

Bought used but

kavakidd

23:25:29 12/25/16

"Manual good. Google is friend."

1973shovel

13:20:31 12/24/16

RE: "Manual good. Google is friend."

Awe-d-o-file

16:21:14 12/24/16

Silver Heels sound better

1973shovel

05:47:24 12/25/16

RE: Silver Heels sound better

Awe-d-o-file

15:27:51 12/25/16

You need the owners manual, posted on December 24, 2016 at 05:36:44

Awe-d-o-file
Dealer

Posts: 21037
Location: 50 miles west of DC
Joined: January 10, 2004

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

"Manual good. Google is friend.", posted on December 24, 2016 at 13:20:31
1973shovel Audiophile Posts: 10117 Location: Greenville SC Joined: February 25, 2007	Excellent advice and mighty straight shootin' there, Tonto!

Some are different, posted on December 24, 2016 at 15:06:18
kavakidd Audiophile Posts: 20316 Location: Upstate NY Joined: April 15, 2004	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?, posted on December 24, 2016 at 16:20:13

Awe-d-o-file
Dealer

Posts: 21037
Location: 50 miles west of DC
Joined: January 10, 2004

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

RE: "Manual good. Google is friend.", posted on December 24, 2016 at 16:21:14
Awe-d-o-file Dealer Posts: 21037 Location: 50 miles west of DC Joined: January 10, 2004	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

Found them--Thanks- but, posted on December 24, 2016 at 18:04:57

Ross
Audiophile

Posts: 1814
Joined: January 24, 2000

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

YUP, posted on December 24, 2016 at 22:49:39
kavakidd Audiophile Posts: 20316 Location: Upstate NY Joined: April 15, 2004	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: Found them--Thanks- but, posted on December 25, 2016 at 05:37:14
Awe-d-o-file Dealer Posts: 21037 Location: 50 miles west of DC Joined: January 10, 2004	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

RE: YUP, posted on December 25, 2016 at 05:39:02
Awe-d-o-file Dealer Posts: 21037 Location: 50 miles west of DC Joined: January 10, 2004	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

Silver Heels sound better , posted on December 25, 2016 at 05:47:24
1973shovel Audiophile Posts: 10117 Location: Greenville SC Joined: February 25, 2007	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!

I know that but the date, posted on December 25, 2016 at 10:47:39
kavakidd Audiophile Posts: 20316 Location: Upstate NY Joined: April 15, 2004	"2004" is printed on a tag inside "Man is the only animal that blushes - or needs to" Mark Twain

RE: Silver Heels sound better , posted on December 25, 2016 at 15:27:51
Awe-d-o-file Dealer Posts: 21037 Location: 50 miles west of DC Joined: January 10, 2004	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

RE: I know that but the date, posted on December 25, 2016 at 20:24:22
Awe-d-o-file Dealer Posts: 21037 Location: 50 miles west of DC Joined: January 10, 2004	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, posted on December 25, 2016 at 23:25:29
kavakidd Audiophile Posts: 20316 Location: Upstate NY Joined: April 15, 2004	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

RE: AI Modulus M3a Gain Switch, and Cap bypass switch ??, posted on January 3, 2017 at 10:50:00
wheezer Audiophile Posts: 4309 Joined: January 24, 2001	The M3 has Bourns conductive plastic attenuators. M3A has Elma stepped attenuators. The two pots track differently.

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