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Old 15th October 2016, 08:21 AM   #11
Salas is offline Salas  Greece
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GB For Salas DCG-3 and DCSTB Power Supplies
Quote:
Originally Posted by JimT View Post
Tea,

I already have an In-Select board that will go in this preamp but am wondering if I need to be extra careful with transformer choice for the In-Select relays. Don't want it spreading hum around. What do you recommend?

Jim
I am not Tea, but here's an idea

That selector board has options and connectors. AC or DC powered. Run a straight DC feed to the selector board from a DCSTB's positive rail. Don't even populate the selector's rectifier diodes and use a 100uF capacitor for decoupling instead of its 2200uF reservoir. Not even a sink for the 7812. One relay only will be engaged for connecting an input. Talking just 10mA. Look in my preamp, no extra transformer. A DC feed +/0 twisted pair travels under the double floor and emerges under the selector's board DC in. OK it does not always have to be a Paris sewers ghost It can simply get nicely dressed on the surface and be better serviceable too.
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Old 15th October 2016, 03:04 PM   #12
MagicBus is offline MagicBus  Greece
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Signed up for boards and full kits. Transformers are included in both DCG3 and DCSTB full kits?
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Old 15th October 2016, 05:13 PM   #13
Tea-Bag is offline Tea-Bag  United States
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GB For Salas DCG-3 and DCSTB Power Supplies
No, only parts to populate the board themselves.
Explicitly listed here on this blog, towards the bottom.

http://www.diyaudio.com/forums/blogs...full-kits.html
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Old 15th October 2016, 07:26 PM   #14
MagicBus is offline MagicBus  Greece
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OK. I guess "includes trans." stands for transistors...
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Old 15th October 2016, 07:33 PM   #15
Tea-Bag is offline Tea-Bag  United States
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GB For Salas DCG-3 and DCSTB Power Supplies
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Originally Posted by MagicBus View Post
OK. I guess "includes trans." stands for transistors...
Yes, i will spell that out. I see where the confusion can arise.
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Old 15th October 2016, 07:54 PM   #16
JimT is offline JimT  Canada
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Salas thanks for the picture. Worth a thousand words. I will try to remember to ask this type of question in your DC3G thread.
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Old 17th October 2016, 03:20 PM   #17
rredline is offline rredline  Singapore
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Hi Tea-Bag,

I have 2 ADA4627 (FET input) on Browndog, can I substitute the servo opamp with it?
If it is possible, can I sign-up a transistor kit without the the costly servo opamp?
Sorry if there is any inconvenience caused.

Last edited by rredline; 17th October 2016 at 03:32 PM.
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Old 17th October 2016, 04:01 PM   #18
Tea-Bag is offline Tea-Bag  United States
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GB For Salas DCG-3 and DCSTB Power Supplies
Quote:
Originally Posted by rredline View Post
Hi Tea-Bag,

I have 2 ADA4627 (FET input) on Browndog, can I substitute the servo opamp with it?
If it is possible, can I sign-up a transistor kit without the the costly servo opamp?
Sorry if there is any inconvenience caused.
Sorry, I do not make kit substitutions. It makes kit making and filling orders very complicated. The kit comes with a socket, so you may be able to try both if they are compatible.
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Old 17th October 2016, 04:13 PM   #19
rredline is offline rredline  Singapore
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Quote:
Originally Posted by Tea-Bag View Post
Sorry, I do not make kit substitutions. It makes kit making and filling orders very complicated. The kit comes with a socket, so you may be able to try both if they are compatible.
No problem. Thanks
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Old 18th October 2016, 07:32 PM   #20
Ascom is offline Ascom  Italy
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Signed up for DCG3 and DCSTB boards plus 1 full kit for DCG3 and 2 full kits for DCSTB.

Best regards,
Raffaele
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