is there an easy way to sum the channels for mono?

D

denti alligator

New member
I ask only because I got some mono records recently and with my AT cartridge they sound horrible. With my Nagaoka MP-110 they sound fine. I'm trying to figure out if my AT cartridge is damaged, or if it simply reacts strangely to the mono.
 
Wouldn't it be great if that were a mental task? The easy way would be to use a 'y' cable to input of your amp.
 
Hi there,

As far as I remember you can also just put a short bridge cable between the left and right output of the center taps of Quickie's volume pot.

Michael
 
That is what I did to get mono for break in on the Orcas, more on that later.  It allows the least sound to escape in my situation.

You use one with two females into a male to sum the two channels.  Plug that male into another Y adapter that has one female back to two males.
 
Thanks, guys. Now if this really is the problem (and I'm not home until Sunday to check) then how could I make a device to switch back and forth between stereo and mono from the Seduction?
 
Mono definitely sounds better with the Y cables summing the channels.

How could I build a switch into my Seduction that would sum the channels for me?
 
denti alligator said:
Mono definitely sounds better with the Y cables summing the channels.

How could I build a switch into my Seduction that would sum the channels for me?
Click to expand...
A switch that connects T26 to T36 will do the job without disturbing any of the other important relationships. Looks to me like the space between the two output jacks is a good place.
 
Cool, great. I'm a total idiot, though, so I'll need specific directions. What kind of switch do I buy and how to I implement it? What I'd like it to be able to switch back and forth between stereo and mono. Thanks in advance!
 
I'm assuming something like this
http://www.parts-express.com/pe/showdetl.cfm?partnumber=060-350
would work. But how do I wire it? Help appreciated!
 
Sam,

You need a DPST or DPST switch.  That one is SPST.  I can give you detailed instructions on wiring it in.

This one is DPDT with center off:

http://www.parts-express.com/pe/showdetl.cfm?partnumber=060-518

Maybe one of these:

http://www.parts-express.com/pe/showdetl.cfm?partnumber=060-538

http://www.parts-express.com/pe/showdetl.cfm?partnumber=060-508
 
Paul,

Just to clarify:  are you saying one could leave the existing wiring as is, and just add a loop from T26 to T36 with a SPST switch in it?  Open = stereo, and closed = mono? That seems to be different from what Grainger is suggesting, and I want be sure before I do anything.  Also, my Seduction is from six or seven years ago--has the circuit and numbering been static since then, or do I need to adjust?  There is a post on the old BH forum on AA that suggests a switch connecting T29&T39, which is partly why I ask.

Thanks,
Brent

P.S. I hope this is okay to ask in this thread instead of starting another one.
 
Brent,

I just helped Denti Alligator through just this.  I can send you the instructions and the sketch I made if you like.
 
It was a cinch. Thanks Grainger!

I have one related question: someone on another forum said he always switches his phono pre to mono for artificially made stereo recordings. So I'm thinking: will that really work? I mean, if I take a stereo pressing of Rubber Soul and switch my Seduction to mono (summing the channels), will it sound exactly like a mono pressing of Rubber Soul (since that was the original). This might convince me to get those new Beatles vinyl reissues!
 
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