GB For Salas I-Select Mesmerize Type input selector and volume control

[gwrskien]

Hello,

boards recived.. they look great!

Thank`s

 

[JPeitzman]

^^ Ditto as of a couple days ago, the boards are beautiful!

Thanks

 

[DrizztDo]

Hello,

does the voltage regulator need to be insolated from the heatsink ? or can it be in direct contact ?

Thank you

 

[Salas]

Direct is ok

 

[Fabian85]

How many VA should the transformer have? Not using the LED indicator

 

[Salas]

A single 12V relay will be engaged at a time and will just use 0.14W. If to have position indicator LED it will only add 0.01W.

So the tiniest of 12V AC transformer will do. Or some compatible AC secondary in the rest of build exists and its possible to share from it. Also no LM7812 sinking will be needed. In case you want to power some extra peripheral utilizing the 12VDC regulated output a 10-20VA transformer and using the sink will do.

 

[Marra]

Thanks Teabag the bag of goodies arrived this am.

Customs picked it up though

 

[tome]

hi Tea-Bag
any boards left ....or any chance for new GB

 

[Tea-Bag]

hi Tea-Bag
any boards left ....or any chance for new GB

I still have plenty left. PM me what you want and email address and I can send you an invoice.

 

[albertNL]

Hi Tea-Bag,

I received the boards some time ago and was checking required parts etc when I noticed the schematic is not included in the pdf file. With the black soldermask it is a bit difficult to follow the traces, so could you please post the schematic?

Thanks,

AlbertNL

 

[Salas]

I received the boards some time ago and was checking required parts etc when I noticed the schematic is not included in the pdf file. With the black soldermask it is a bit difficult to follow the traces, so could you please post the schematic?

Thanks,

AlbertNL

Hi Albert, here is the schematic and the board tracing. Also the positions and poles pins for CK1030/CK1025 Lorlin switch.

1-6 ---> A
7-12 ---> C

The relays PSU ground is not already connected to the signal ground so to allow you open grounding options. Builds are many and different, the general grounding scheme this selector board ends up working with each time is unpredictable.

If you borrow DC from the preamp its ground return may already be showing continuity to the signal ground for instance. If not or you have a dedicated transformer for the selector board you may need to connect its input/output ground line with its 7812 PSU ground line to avoid hum. Or you may opt wiring both of them to chassis if common to system ground along with the metal body part of the pot if its not already having continuity to chassis through an extension rod or by being mounted on the front plate. Anything that works best for no hum.

 

[albertNL]

Thanks Salas

 

[JimT]

Will these be part of the DCG3 group buy? If not I would like to order two full kits.

Jim

 

[Tea-Bag]

Will these be part of the DCG3 group buy? If not I would like to order two full kits.

Jim

They are available now, and will also be available during the DCG3 group buy.

 

[gwrskien]

How far along have DCG3 come?

 

[Tea-Bag]

How far along have DCG3 come?

It's almost ready for a GB. Salas continues to write a manual based purely on my misunderstandings of the device

The main thread is here.
http://www.diyaudio.com/forums/anal...alas-dcg3-preamp-line-headphone-new-post.html

There is no GB thread for it at this point.

 

[aspringv]

Subscribing for interest in the DCG3 and probably a few spare selector PCB's

 

[Tea-Bag]

Okay, the current GB is now open until 11/20/2016.

Please sign up, and I will send a Private message with details.

 

[delecoy]

Hi Tea,

Please sign me up for one board and one minikit.

Thanks,

Cody

 

[Tea-Bag]

Hi Tea,

Please sign me up for one board and one minikit.

Thanks,

Cody

Done, invoice sent.
Thanks!