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Old 11th April 2013, 10:40 AM   #1
Jason is offline Jason  Australia
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Default F-5 Turbo boards

This thread is for discussions about the F-5T clone boards. For more information on this product, please see the product page below.

Threads on diyAudio that relate to this product (If we have missed one, please post it in this thread and we will add it to the list):

BILL OF MATERIALS

The current set of boards available from the store comes in a set of 6 boards with the SKU of P-F5T-6V30 (that SKU decodes to "PCB, F5T, 6 pieces of revision 3 of the boards"). Please note that the fact it's revision 3 of the boards has nothing to do with whether you are making a V1, V2, V3 or V99 F5T and just means it's the third revision of the boards we've put out.

If you have P-F5T-6V30 boards and are making a V2 F5T use this BOM: F5T V2 (revision 2 of the F5T V2)

If you have P-F5T-6V30 boards and are making a V3 F5T use this BOM: F5T V3 (revision 1 of the F5T V3)

Note that the numbering of the silk matches the V3 schematic. The V2 just omits certain parts.

Last edited by Jason; 3rd October 2013 at 09:53 PM.
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Old 11th April 2013, 01:19 PM   #2
nrg2009 is offline nrg2009  United States
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I ordered some F5T boards. I'm hoping to build:
- F5Turbo v2 (~50Watt)
- two channel in 1 enclosure: 5U deluxe
- 1 toroid, but separate power pcb from there

wish me luck.
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Old 11th April 2013, 04:06 PM   #3
Variac is offline Variac  United States
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That sounds like a reasonable plan... Good Luck!
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Old 13th April 2013, 05:17 AM   #4
Jason is offline Jason  Australia
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The first limited batch of F-5T beta boards sold out very quickly, we're going to send in the rest now to the warehouse and just keep them advertised as beta until we get more success stories.
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Old 18th April 2013, 07:40 PM   #5
2bz is offline 2bz  United States
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Are any of the f5t boards available or are they all gone aready?

Thanks.
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Old 19th April 2013, 02:15 AM   #6
nrg2009 is offline nrg2009  United States
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At the top of the amp board, the section with 4 connections marked O/P
I am guessing the most left goes to p-channel board to Gate
The 2nd from the left goes to p-channel board to O/P
The 3rd from the left goes to n-channel board to O/P
And the 4th to n-channel Gate

Does this sound correct?

The +Ve and Ground on the p and n channel boards come from the power board.

Next question: what does the `link` do on the amp board? For F5Tx?

Thanks.

Last edited by nrg2009; 19th April 2013 at 02:27 AM.
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Old 19th April 2013, 02:25 AM   #7
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Outer holes are output to gates. inner holes are feedback points from output board. Will only need to use one of feedback holes, as they are connected. Ve+ and Ve- are from PSU board. The wiring gets hairy. Be careful and ask questions.

You must connect link and ground if not using as balanced. If balanced, you would connect link to other boards link. THis i where you would have negative and positive halves of the input signal.
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Last edited by buzzforb; 19th April 2013 at 02:28 AM.
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Old 19th April 2013, 02:30 AM   #8
nrg2009 is offline nrg2009  United States
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Great! I think i got it. I know to post photos for review, this is a great forum for that.
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Old 19th April 2013, 02:34 AM   #9
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IF you want to be uber careful, you can power up FE boards before attaching output boards. THis way if something is not right, you dont burn anything. With high IDSS Jfets like you have, the outputs will come up hot, so trim the pots down before powering up if you dont go safe or you dont have a variac.
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Old 15th May 2013, 01:31 AM   #10
Lo_Tse is offline Lo_Tse  Canada
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Just to confirm:

Looks like each of the the output boards have places for 4 output FETs? Or did I read it wrong? The reason that I am asking is because I was told that I need 2 sets to build a F5T V3 [with one front end board (for the cascode)left over], which has 8 FETs per channel. So does it mean that I am only using one side of each of the output board? It actually would fit my plan perfectly since I want to place 4 output FTEs per heat sink and I have 4 for 2 mono-blocks.

Any comments will be appreciated.

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