F5X -- the EUVL Approach - Page 6

EUVL · 2nd March 2011, 03:13 PM

I just open a new thread to promote discussions and exchange of experiences on the power transformers :

Power Transformer for Class A Amplifiers -- What are your experiences ?

Patrick

EUVL · 5th March 2011, 09:10 AM

Some news :

We got some but not all of the parts for the prototype case.
Will post some photos of loose parts middle of next week.

Patrick

Horio · 5th March 2011, 03:16 PM

Quote:

Originally Posted by EUVL

Some news :

We got some but not all of the parts for the prototype case.
Will post some photos of loose parts middle of next week.

Patrick

I've been looking forward to this one...

EUVL · 5th March 2011, 04:03 PM

I can only apologise for the delays. A lot of those are not up to me.

We have had bad luck of a computer crash and other unexpected domestic matters that hinders the progress of the PCBs, although we are weeks away only (only the main amp daughter board to do).

There is a economic boom in Asia right now, which means the workshops are short of people, and the order books are full. You can understand that prototyping for a hobby project will not have any priority, and quite rightly so.

But we are discussing with the forum on details now, which is progress. So I still hope to be able to finish the prototype case before Easter, and the PCB testing depends again on how long the vendor will take. The circuit optimisation will take longer.

For those who cannot wait, I can only encourage you to make a working prototyping first using a pair of the standard F5 board you can purchase from the forum (using e.g. cheaper parts like IRFP MOSFETs), and then upgrade later.

Thank you again for your continuous support,
Patrick

d to the g · 5th March 2011, 04:07 PM

Regardless of time table, your dedication to the hobby is tremedous, and appreciated.

qusp · 5th March 2011, 04:11 PM

no need to apologize, though i understand the compulsion, even when something is beyond your control it is still easy to feel something when people are waiting. there really is no reason to be sorry for doing a nice thing for the forum members, even if slowly, but surely; many of whom are strangers to you. we will be here ready and waiting and when you are ready you will not get the smiles off our faces.

keep up the good work, we really do appreciate it!!!

qusp · 5th March 2011, 04:38 PM

haha what a suck

, all true but

seriously though

just joking, see above post

Horio · 5th March 2011, 05:35 PM

No apologies needed Patrick. I think we all understand that everyone inlvolved in the project has a life outside of this project. I'm just excited to see how the prototype case will turn out. Thanks again for all your efforts!

EUVL · 07:38 PM

I had some time today and got the control & protection board working.

This is the start up state.

The mains relay to the 500VA transformer will turn on 2 seconds after power on switch. (as represented by the red LED top right).

.

EUVL · 5th March 2011, 07:31 PM

One press of the push button (blue) will put it to the standby state, where the regulators would be turned on (as indicated by the red LED bottom left), but the inputs are still shunted, and the outputs are disconnected (if you choose to use a series speaker protection relay).

The red LED on the front panel will also turn on (middle, below the push button).

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2nd March 2011, 03:13 PM	#51
EUVL diyAudio Member Join Date: Oct 2003	I just open a new thread to promote discussions and exchange of experiences on the power transformers : Power Transformer for Class A Amplifiers -- What are your experiences ? Patrick

5th March 2011, 09:10 AM	#52
EUVL diyAudio Member Join Date: Oct 2003	Some news : We got some but not all of the parts for the prototype case. Will post some photos of loose parts middle of next week. Patrick

5th March 2011, 04:03 PM	#54
EUVL diyAudio Member Join Date: Oct 2003	I can only apologise for the delays. A lot of those are not up to me. We have had bad luck of a computer crash and other unexpected domestic matters that hinders the progress of the PCBs, although we are weeks away only (only the main amp daughter board to do). There is a economic boom in Asia right now, which means the workshops are short of people, and the order books are full. You can understand that prototyping for a hobby project will not have any priority, and quite rightly so. But we are discussing with the forum on details now, which is progress. So I still hope to be able to finish the prototype case before Easter, and the PCB testing depends again on how long the vendor will take. The circuit optimisation will take longer. For those who cannot wait, I can only encourage you to make a working prototyping first using a pair of the standard F5 board you can purchase from the forum (using e.g. cheaper parts like IRFP MOSFETs), and then upgrade later. Thank you again for your continuous support, Patrick

5th March 2011, 04:07 PM	#55
d to the g diyAudio Member Join Date: Aug 2006 Location: minimalopolis	Regardless of time table, your dedication to the hobby is tremedous, and appreciated.

5th March 2011, 04:11 PM	#56
qusp is choosing a less facetious title... diyAudio Member Join Date: Oct 2009 Location: Brisbane, Australia	no need to apologize, though i understand the compulsion, even when something is beyond your control it is still easy to feel something when people are waiting. there really is no reason to be sorry for doing a nice thing for the forum members, even if slowly, but surely; many of whom are strangers to you. we will be here ready and waiting and when you are ready you will not get the smiles off our faces. keep up the good work, we really do appreciate it!!!

5th March 2011, 04:38 PM	#57
qusp is choosing a less facetious title... diyAudio Member Join Date: Oct 2009 Location: Brisbane, Australia	haha what a suck , all true but seriously though just joking, see above post

5th March 2011, 05:35 PM	#58
Horio Newbie diyAudio Member Join Date: Mar 2010 Location: San Francisco	No apologies needed Patrick. I think we all understand that everyone inlvolved in the project has a life outside of this project. I'm just excited to see how the prototype case will turn out. Thanks again for all your efforts!