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My_Ref Fremen Edition GB (9th run - v1.7 boards)

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Price fixing

Well, no one jumped in before the deadline so price is fixed at 26€/kit (best price of last GBs 🙂 ).

Tomorrow I'll start sending PayPal invoices.

All payments are due by Sunday, 24.

Until boards are ordered next week the GB is still open to late partecipants (immediate payment required) but price won't change anymore unless an important amount (10 more kits) of additional boards come in.
 
Paid, can you give a link on this Evo A ? I can't find by myself

Mauro Penasa, the designer of the original My_Ref, made an evolution of his design called My_Evo (AKA Evolution) which was not pubblic and boards are no longer available since a long time.

The My_Ref Fremen Edition is a parallel unofficial evolution of the original My_Ref which shares with the My_Evo several ideas (but with a different and simpler implementation).

The original My_Ref had 3 different compensation schemes (Rev A, Rev B and Rev C).

The My_Evo and Fremen Edition has a similar compensation scheme.

Penasa later did an improved compensation scheme for his My_Evo (Rev A), which is applicable also to the Fremen Edition.

The Fremen Edition is directly compatible with My_Ref Rev C, Fremen Edition and My_Evo Rev A compensation schemes.

At the end it's simply a difference in BOM where some values changes and some components are omitted.

If you want to use My_Evo Rev A compensation scheme on the Fremen Edition simply follow directions in BOM.

PS
All these info are already available on the design thread, the build thread and on the build guide, did you read them, isn't it? 😉
 
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OK thanks for this. Yes I saw the differences in the BOM, but cannot find explanation on why. In fact, a very simple mod to implement, or not 🙂
Next time I'll try looking in the XXXX pages of the XX topics talking about this design :hypno2:
 
OK thanks for this. Yes I saw the differences in the BOM, but cannot find explanation on why. In fact, a very simple mod to implement, or not 🙂

You're welcome.

Next time I'll try looking in the XXXX pages of the XX topics talking about this design :hypno2:

It would be a good idea while waiting for boards to arrive... 😀

I understand that it could seem a bit overwhelming reading all threads.

But it's not a bad idea to read at least the last month of activity on the build thread (did you subscribe it, right?).

The build guide is a mandatory read that addresses already a lot of repeatedly asked questions.

From the build guide linked in the opening post:

attachment.php


This is not a business for me, otherwise boards would never cost so little... Nevertheles I've dedicated to this project and group buys a lot of time and money (and continue to do) and I give a lot of support, even answering again and again to the same questions.
 

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This is great amp and we thank you Dario for doing all of this!
You're welcome. 🙂

And now , my 2 cent question , any major sonic differences between My_Ref Rev C and Fremen Edition ?
Thanks to the improved PS and new compensation (and other minor mods) the Fremen Edition sounds much more refined on high frequency with wider and deeper soundstage and with reduced measured and perceived distortion.

Also the base improves (tighter and more tuneful).
 
was going to pay, but stop by occupation habit

just wondering how much was the kit with smd soldering ?

50€ more per kit, in your case for just one of the two, so a grand total of 118€.

I must really thank you for this... I've billed 10€ less to all partecipants with SMD option for a not updated formula in Excel!

I will send to all partecipants with SMD option a second invoice for the missing 10€, sorry for the mistake.
 
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