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Interest for Final GB for F5X Power Amp
Interest for Final GB for F5X Power Amp
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Old 16th November 2018, 07:59 AM   #1
EUVL is offline EUVL  Europe
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Join Date: Oct 2003
Default Interest for Final GB for F5X Power Amp

Over the years we have been asked many times for F5X PCB sets and matched devices.
We have declined every time because a set of boards without the case is no use.

One of the senior members here has expressed a willingness to supply the case for a limited batch to DIYers.
So we wish to know if there is still any interest before we make the necessary preparations.

It will be a last-time GB limited to 10 sets.
They will include matched FETs incl. regulator FETs, PCB set and fully machined case.
You should be looking at a total building cost (fully finished) for a stereo amp of around 3000.

Please indicate any interest here.
There will be no guarantees if we go ahead, but we shall try our best to make it happen, some time in 2019.


Patrick
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Old 16th November 2018, 04:28 PM   #2
Lbud4 is offline Lbud4  United States
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Join Date: Feb 2013
Location: Vail, Colorado
I am interested
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Old Yesterday, 01:07 PM   #3
passive420 is offline passive420  United Kingdom
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Join Date: Jun 2013
Patrick can you give an estimate of cost for the PCB set/devices and case parts?
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Old Yesterday, 03:04 PM   #4
EUVL is offline EUVL  Europe
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Join Date: Oct 2003
Not right now. Still too early.

But you know curve trace matched octets of Toshiba JFETs at coonstant temperature have their price.
So are unibtanium 2SK1530 / 2SJ201 NNNNPPPP match.
Search around and you will have an idea.
PCBs are nothing in comparison.

The case will have to be made in the EU.
So expect something like 600€ miniimum, plus transport.
There is no case like ours anywhere, not even commercial ones.

The next major expenditure are transformers.
2x 600VA Toroidy will be around 200€.
And then it depends on what boutique parts you use for the rest,

I do not think it will be less than 2000€ in total.
But it is meant to be a reference amp and not a budget amp.
The same goes for the F5X Preamp, to be released about the same time frame.

We are only checking interest npow because we need to make some plans for the case.


Cheers,
Patrick
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Old Yesterday, 03:58 PM   #5
passive420 is offline passive420  United Kingdom
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Join Date: Jun 2013
I understand, thanks Patrick.

Both your F5X in the LinearAudio pdf (excellent info) and by Markus in the main build thread are incredible. Looks like Markus tried to sell his on at some point, this would be the amplifier of a lifetime no doubt.

Certainly thinking about it.
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Old Yesterday, 06:51 PM   #6
EUVL is offline EUVL  Europe
diyAudio Member
 
Join Date: Oct 2003
Not correct. Markus (from Germany) is not selling.
John (from Australia) was, but in the end after talking to me, he retained it for own use.

And two builders of the power amp are now beta-testing the preamp.
The F5X Preamp


Patrick
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