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Old 8th August 2012, 11:35 AM   #1651
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If it is not too late, please consider me for the group buy of 4 FQA Quad of matched N and P Mosfets (total 32 transistors) and 16 MUR3020 Vishay diode sets.
Greetings to all from a very hot Athens Greece.
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Old 11th August 2012, 07:46 PM   #1652
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Little Progress with TeaBag's boards
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Old 15th August 2012, 08:17 PM   #1653
BigE is offline BigE  Canada
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I am totally confused with this thread. My intent was to build a pair of monster V3 monoblocks.

What happened to UK toecutter's modular boards?

Are they or will they be the DIYaudio stores boards?

Where did Tea Bag's boards come from and where are their schematics/capabilities outlined?

Sorry if I've missed these explanations. But it's really confusing.
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Old 15th August 2012, 08:28 PM   #1654
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Big E,
You can see TeaBags baords in the picture. They have the mosfets spaced at the Store's universal mounting distance of 40cm. They have the diodes mounted in between the fets at same spacing. If all are devices are mounted on a sink, then you have a device every 20cm. I have chosen to mount the diodes off board, as heat has not been an issue. My final plan is to have a copper bar connecting them all before being attached to their individual heatsinks to act as a spreader and also for thermal tracking. I am not sure if you can mount all 8 fets on a single sink, run at 1a bias, and get away with it without a fan. Best chance would be to mount them on a heat spreader attaching two sinks together like mine. Ill try to post idea for dual mono later on.

Here is link to his thread.
GB for F5T Convertible amplifier boards
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Old 15th August 2012, 08:33 PM   #1655
BigE is offline BigE  Canada
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Thanks! I'd appreciate the monoblock info. I've got a couple hundred bucks worth of fets coming, and wanted to used them as monoblocks.

Just now completing the thought process on the Hotrodded DCB1 buffer. A heat-spreader like yours (or copper) will be a must on that project, since the transistors don't reach the heatsinks.
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Old 15th August 2012, 09:00 PM   #1656
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No worries. If i have to, ill design some boards for folks wanting monoblocks. I have adcb1 being used in FE of xover with bias set high with 22ohm resistors and fets floating, and they are ok. Heatsink need is based on bias. You may not even need them.
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Old 15th August 2012, 10:14 PM   #1657
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Quote:
Originally Posted by buzzforb View Post
Big E,
You can see TeaBags baords in the picture. They have the mosfets spaced at the Store's universal mounting distance of 40cm. They have the diodes mounted in between the fets at same spacing. If all are devices are mounted on a sink, then you have a device every 20cm. I have chosen to mount the diodes off board, as heat has not been an issue. My final plan is to have a copper bar connecting them all before being attached to their individual heatsinks to act as a spreader and also for thermal tracking. I am not sure if you can mount all 8 fets on a single sink, run at 1a bias, and get away with it without a fan. Best chance would be to mount them on a heat spreader attaching two sinks together like mine. Ill try to post idea for dual mono later on.

Here is link to his thread.
GB for F5T Convertible amplifier boards
regarding the diodes. i think its a little stupid way to go with fet, diode, fet, diode. you will not get any symetry on dual sinks.
a better way will be fet, diode, diode, fet
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Old 15th August 2012, 10:28 PM   #1658
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Agreed. That is why mine are off sink and will be tied together with copper bar.
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Old 27th August 2012, 10:51 PM   #1659
a.wayne is offline a.wayne  United States
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Any updates ...?
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Old 27th August 2012, 11:35 PM   #1660
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Any updates ...?
+1. i'm just about to cut my output boards in two if the new boards don't come soon
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