k-12

creamcorn · 16th January 2008, 12:31 AM

I am putting a k-12 kit together. Its my first amp, and I want to put it in a nice 7 by 7 by 3 inch wooden box. Is the box too too small ?

Thank you , CC

creamcorn · 16th January 2008, 03:31 AM

To clarify, I meant does the size allow for enough space between the Power and Output transformer, and its the K-12 kit from tube depot. I searched and saw that there may be a problem, but found nothing definitive.

Thank you again , CC

dhaen · 16th January 2008, 07:21 AM

The way they are laid out on the website: k-12 needs a big space between mains and OP tx's.
By just turning the mains tx by 90 deg, you will be able to place them much closer; probably within an inch of each other without danger of interaction.
To be more specific, the windings of the mains tx should be at 90 deg to the windings of the op tx's.

creamcorn · 16th January 2008, 11:46 AM

Thank you so much dhaen.

webelo · 16th January 2008, 12:31 PM

What are you planning on putting in the box?

I'm builidng a k-12 right now and mine is going in an 8inx12in box. I'm mounting the PTX in the box and the OPTs outside.

creamcorn · 16th January 2008, 12:43 PM

I guess its for vanity sake that I want to hide the transformers. I have my tube sockets on the opposing side to the other components. Im planning on drilling four holes and leaving the everything else in the box. What are you planning.

creamcorn · 16th January 2008, 12:46 PM

Im sorry i see now that you already said what your planning. Is this your first? Im painfully inexperienced.

webelo · 16th January 2008, 01:21 PM

Ya, this is my first go at an amp. I'm learning as I'm going... it's a slow process, but I'm chatching on little by little. I built up the amp stock on the breadboard, now I'm moddding it and putting it in an enclosure. I've attached a picture so you can get an idea of what I'm doing. The power trannie will be mounted underneath, but I'll leave the output trannies on top. The sheet is 8x12. You could probably go smaller, but with the tighter space you need optimal planning and layout (I have little of both).

creamcorn · 16th January 2008, 03:54 PM

Your output transformers would be the type I wouldn't mind showing. I like the toggle switch. thats the one i had in mind. I've used one before on a chip amp I made.

webelo · 16th January 2008, 03:58 PM

the outputs are Hammond 1609s. Other people said they make a pretty good dropin upgrade. So, I'm giving them a shot. The kit was a gift, so it wasn't a big deal for me to drop $100 bucks on the upgrades.

16th January 2008, 12:31 AM	#1
creamcorn diyAudio Member Join Date: Nov 2007	k-12 I am putting a k-12 kit together. Its my first amp, and I want to put it in a nice 7 by 7 by 3 inch wooden box. Is the box too too small ? Thank you , CC

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16th January 2008, 03:31 AM	#2
creamcorn diyAudio Member Join Date: Nov 2007	To clarify, I meant does the size allow for enough space between the Power and Output transformer, and its the K-12 kit from tube depot. I searched and saw that there may be a problem, but found nothing definitive. Thank you again , CC

16th January 2008, 07:21 AM	#3
dhaen diyAudio Moderator Emeritus Join Date: Jun 2002 Location: U.K.	The way they are laid out on the website: k-12 needs a big space between mains and OP tx's. By just turning the mains tx by 90 deg, you will be able to place them much closer; probably within an inch of each other without danger of interaction. To be more specific, the windings of the mains tx should be at 90 deg to the windings of the op tx's.

16th January 2008, 11:46 AM	#4
creamcorn diyAudio Member Join Date: Nov 2007	Thank you so much dhaen.

16th January 2008, 12:31 PM	#5
webelo diyAudio Member Join Date: Oct 2007	What are you planning on putting in the box? I'm builidng a k-12 right now and mine is going in an 8inx12in box. I'm mounting the PTX in the box and the OPTs outside.

16th January 2008, 12:43 PM	#6
creamcorn diyAudio Member Join Date: Nov 2007	I guess its for vanity sake that I want to hide the transformers. I have my tube sockets on the opposing side to the other components. Im planning on drilling four holes and leaving the everything else in the box. What are you planning.

16th January 2008, 12:46 PM	#7
creamcorn diyAudio Member Join Date: Nov 2007	Im sorry i see now that you already said what your planning. Is this your first? Im painfully inexperienced.

16th January 2008, 01:21 PM	#8
webelo diyAudio Member Join Date: Oct 2007	Ya, this is my first go at an amp. I'm learning as I'm going... it's a slow process, but I'm chatching on little by little. I built up the amp stock on the breadboard, now I'm moddding it and putting it in an enclosure. I've attached a picture so you can get an idea of what I'm doing. The power trannie will be mounted underneath, but I'll leave the output trannies on top. The sheet is 8x12. You could probably go smaller, but with the tighter space you need optimal planning and layout (I have little of both).

16th January 2008, 03:54 PM	#9
creamcorn diyAudio Member Join Date: Nov 2007	Your output transformers would be the type I wouldn't mind showing. I like the toggle switch. thats the one i had in mind. I've used one before on a chip amp I made.

16th January 2008, 03:58 PM	#10
webelo diyAudio Member Join Date: Oct 2007	the outputs are Hammond 1609s. Other people said they make a pretty good dropin upgrade. So, I'm giving them a shot. The kit was a gift, so it wasn't a big deal for me to drop $100 bucks on the upgrades.

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