Multiple input anyone?

[canersahin]

Hello everyone,

I will be start building my TSE soon and I would like to know if any of you guys have built TSE with multiple input selection? I would like to use the amp with CD's and Vinly's.

Can anyone tell me how?

Thanks

 

[zman01]

Caner,

For Vinyl you will need a phono preamp - you already have that?

 

[canersahin]

Hello Zia,

Nope I got nothing but I will get them in time. Building the system from the ground 🙂

I am willing to listen any advice.

Caner,

For Vinyl you will need a phono preamp - you already have that?

 

[BillEpstein]

For just 2 inputs a double pole double throw toggle switch will serve, more will require a rotary like the high quality Grayhill shown (lower right). The Grayhill is small and a bit finicky to wire but clearly marked L&R, 1-6.

The switch was positioned close to the inputs and away from the power supply with "L"brackets from your local Ankara Home Depot 🙂

 

[canersahin]

Hello Bill,

How do you control the switch from inside of the chassis? Can you provide me a wiring diagram please? A simple one will do 🙂

For just 2 inputs a double pole double throw toggle switch will serve, more will require a rotary like the high quality Grayhill shown (lower right). The Grayhill is small and a bit finicky to wire but clearly marked L&R, 1-6.

The switch was positioned close to the inputs and away from the power supply with "L"brackets from your local Ankara Home Depot 🙂

 

[BillEpstein]

Rotary switches have multiple inputs, left and right on a "deck", 6 for each channel, as shown in the pic, fed from the RCA "hot" inputs. The single solder tab above each deck is the switch output that wires to the Left and Right poles of the volume control. RCA input Grounds are summed and a single wire for each channel ground goes to the volume control ground.

An externally hosted image should be here but it was not working when we last tested it.

Shown is the Grayhill 71BD30-01-2-AJN.

I use brass rods run through a 1/4" bushing in the chassis hole and connected with "Flex Shafts" as shown from McMaster-Carr

McMaster-Carr

If you're clever about twisting hot and ground wires and routing them where 2 planes of the case meet you can probably do without the shafts and mount the selector directly to the front of the chassis. You're RF environment and orientation of the power supply will dictate that.

Far simpler would be a toggle switch mounted directly above the inputs at the rear of the chassis but only good for 2 inputs.

A DPDT (double-pole double-throw) switch has 3 pairs of solder lugs oriented vertically. Keeping in mind that the toggle selects the pole opposite the direction of throw, you wire the "hot" RCAs of each source to the respective left and right pair of solder lugs, top and bottom, with the middle pair of lugs being the switch output to the volume control. The RCA neutrals go to the volume control neutrals directly.

I like the TOCOS 3T206N with silver contacts.

Hope this helps.

 

[KatieandDad]

You can get three position toggle switches.

 

[BillEpstein]

You can get three position toggle switches.

On-On-On?

I didn't know that!

 

[canersahin]

Hello Bill,

I am having a hard time to understand without the parts and wiring diagram. From my understanding i need,

Two rotary switches,
One Grayhill 71BD30-01-2-AJN,
One DPDT switch,
and Flex Shafts to control the volume pot.

Am i right?

Hope this helps.

 

[zxx222]

For two inputs selection you need only dpdt switch, I built mine that way. Attached photo of wiring mess inside is a bit blurry, but I think it is good enough to understand how it works. Wires from RCA inputs go to DPDT switch, from there to volume pot, from pot to board. 😀

 

[canersahin]

So just DPDT switch solve my problem then? 🙂

Can you draw a super simple diagram it is hard to trail those tiny cables 😀

I will use James Audio's aswell 🙂

For two inputs selection you need only dpdt switch, I built mine that way. Attached photo of wiring mess inside is a bit blurry, but I think it is good enough to understand how it works. Wires from RCA inputs go to DPDT switch, from there to volume pot, from pot to board. 😀

 

[zxx222]

I am posting pic I found via google - obviously, in our case RCA "outputs" are inputs and "input" is directly wired to volume pot, so no RCA that is shown on scheme. You should not ground RCA as shown on scheme, because they are grounded through TSE board.

 

[canersahin]

That's it thanks a lot 🙂