F5X -- the EUVL Approach - Page 65 - diyAudio
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Old 9th January 2012, 04:15 AM   #641
EUVL is offline EUVL  Europe
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Yes.

Patrick
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Old 9th January 2012, 04:24 AM   #642
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hi apex send me calculation of transformer using EI core and toroidal core. thanks! send it to iiee3602@yahoo.com
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Old 9th January 2012, 05:13 AM   #643
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i think you posted in the wrong thread iiee3602
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Old 11th January 2012, 06:04 AM   #644
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I have a question about the BOM:

Is the Idss of the JFET specified at 10V 25C ?

Thanks,

Davide
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Old 11th January 2012, 06:18 AM   #645
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Depends.

In the standard version, the FET will see about 13V at Idss.
So if you want to be exact, this would be the working condition you need to match at.
(For the P-JFET with 5R degen.)

But room temperature match at 10V is close enough for most.


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Old 22nd January 2012, 01:26 AM   #646
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Happy New Year to our Chinese and Hong Kong members.

Davide
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Old 22nd January 2012, 04:51 AM   #647
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Davide,

Many thanks on behalf of them, but you are actually one day too early.
Chinese New Years day should be 23 Jan 2012.
But Mark & Co are already not reachable by email till end of January.

Here also picture of a Chinese Dragon, which is a bit different from its European counterpart.


Patrick
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Old 22nd January 2012, 04:54 AM   #648
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For the case subscribers, the cases were actually all packed ready to ship by Thursday.
But the bank transfer from John had not arrived.
So we all agreed that they would be shipped when Mark comes back, which will be 2 Feb.


Patrick
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Old 26th January 2012, 02:15 PM   #649
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EUVL,

Can you point me to the documentation related to F5 bridging.

I am trying to understand if I can use it in my situation.

forgive my ignorance. I see that in the balanced version, we can make it work like bridged amp. Is that true.

If my preamp has output of 3v rms, and has rca outputs, can it be used.

Thanks
pandu
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Old 26th January 2012, 02:23 PM   #650
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The F5X as described in this thread, in the floating X configuration, is straightly speaking a fully differential amplifier as opposed to a bridged amp using 2x single ended amps. The grounded X configuration, however, can be considered as a bridge amp.

> If my preamp has output of 3v rms, and has rca outputs, can it be used.

Again in theory you can use the floated X configuration with RCA inputs. But for optimum performance, we strongly recommend fully balanced inputs.

RCA inputs however will not work with the Grounded X configuration. You need to use a single ended to balanced converter, such as e.g. a Phase Splitter.

Eventually when fitzfish is ready to start his build & test thread, the issue for using RCA inputs as well as the performance under these conditions would be described in detail.


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