First One - mosFET amplifier module

[firestorm]

When will v1.3 be available ?

 

[Lazy Cat]

Hi firestorm

As I said lately, v1.3 will be presented on local Hi-Fi show, taking place 3-5.10. in Ljubljana.

Depending on majority of responses I'll decide whether v1.3 will be released and if, when.

Until exhibition starts more new devices presented here, stay tuned.

 

[Lazy Cat]

What's cooking

 

[BYRTT]

Where is Heineken everything else looks very good and interesting first sign your battery pre.

 

[Lazy Cat]

Yes, and here's the second sign of battery powered preamp.

Buffering stage with TKD ladder type attenuator still to come. Preamp Will have two outputs high Z and low Z. High Z output is passive output with of course zero gain, low Z output (few Ohms output impedance) is buffered and set to +6 dB voltage gain.

In listening position everything supplied from mains is completely disconnected, so pure battery DC to passive/buffer stage and believe me this can be heard so well.

Still more to come ... stay tuned

 

[Lazy Cat]

Where is Heineken

In my hand at the moment

Click

 

[BYRTT]

... stay tuned

.....great specs see microprocessor battery charger and few ohms output Z could nearly swing a speaker.

PS Fine movie there at Click , remember particular "BIRDIE NAM NAM" scene.

 

[Lazy Cat]

PS Fine movie there at Click , remember particular "BIRDIE NAM NAM" scene.

One of my favourite's comedy movies of all times.

 

[pinnocchio]

Will that be available in a DIY format or as a full consumer product?

Ciao!
Do

 

[Lazy Cat]

Important thread news

Will that be available in a DIY format or as a full consumer product?

Ciao!
Do

Hi all

All PCB modules presented here in this thread will be available for group buy, very soon.

After Hi-Fi Exhibition in Ljubljana and Zagreb Hi-Fi Show new threads will be started in Vendor's Bazaar. New thread for the First One amplifier module v1.3, new thread for the First One accu powered preamplifier and new thread for First One accessories like VU peak-rms meter, DC sense, FO soft start, etc.

Also exact pdf instructions of how to transform First One amplifier module v1.2 to v1.3 will be presented, but only individually to the ones who can and will send a firm proof of finished & functional First One v1.2 amplifier. Version transformation instructions will be step by step, doubtless, pictures followed instructions, so anyone could do it by himself in an easiest way.

Today two new modules comes into daylight.

 

[von Ah]

One of my favourite's comedy movies of all times.

"Just... lift the... ashtray... please." My favorite scene.

FO and pre looking wonderful, LC.

 

[pinnocchio]

I've started my build of the FO and will be testing three different PSUs with it to see what I like best.

For those of you who speaks french (or you can translate the pages), I have started a thread here :

Amplificateur FO (First One) avec alimentation AudioPower SMPS

Really looking forward hearing this amplifier!

So it is being updated on a daily basis.

Ciao!
Do

 

[Xerxes75]

Hi Do,

I will be looking forward to your findings.

 

[giannettino]

Hi Do,

I will be looking forward to your findings.

Me too
Ciao Do!!!

 

[Lazy Cat]

Hi Dominic

Very good proof of First One v1.2 assembly.

Whenever v1.2 to v1.3 instructions will be available you are on.

Enjoy

 

[Lazy Cat]

First One black chassis - Cable management

Hi all

First One v1.3 "Black Mamba" from post #1403 finished today.

In order to be very clear here's photo bulletin of proper cable management in a official First One chassis to have the least stress of EMI. Be careful of how mains cabling is routed through the chassis.

New builders can observe the detailed views and get some ideas of implementations in their own chassis assembly.

All the best, L.C.

 

[Lazy Cat]

First One Buffer preamplifier & VU rms-peak meter

As promised two new modules revealed before installing into chassis.

Buffer preamplifier can be ladder attenuator or shunt attenuator type PCB.

VU rms-peak meter is linear from DC-100 kHz and shows two ranges power levels: -40 dB to -10 db and -30 dB to 0 dB

Both are suited to work with First One amplifier module, VU meter fits nicely to front plate in official C1 chassis.

 

[pinnocchio]

Hi LC,

I'd love to purchase those speaking terminals, the ones on the chassis. Could you tell me what brand/model they are?

Thanks
Do

 

[Lazy Cat]

Will send you link during the day

 

[pinnocchio]

Will send you link during the day

Thanks!