Of course, many, everyone who qualified by sending me pics of an operational First One amplifier. The difference after upgrade is noticable and definitely worth to try.
Great, please check your gmail from few days ago...but I didn't have the time to properly listen v1.2 so no rush...
Sent. 😉
Hundreds modules sent out, anyone else needs upgrade manual?
Uhh..my red jewels are still in the box..sorry...
Maybe i can go direct to 1.3 ?? 😀😀😀😀😀😀😀
Hi LC,
I've been trying to source some thin film or metal film SMD for 0.5W 1206 1% but cannot find anything at all for 47R @ Digikey, Mouser, Allied, Newark (for Canada/USA)... Only find thick film resistors but I've been told many times not to use them in audio due to higher parasitic inductance and capacitance and also noise...
Could you please give me some MFG part numbers that I could lookup?
47R -->
Thanks
Do
I've been trying to source some thin film or metal film SMD for 0.5W 1206 1% but cannot find anything at all for 47R @ Digikey, Mouser, Allied, Newark (for Canada/USA)... Only find thick film resistors but I've been told many times not to use them in audio due to higher parasitic inductance and capacitance and also noise...
Could you please give me some MFG part numbers that I could lookup?
47R -->
Thanks
Do
HI mikvous, I like carbon 🙂
It can be harmful to use a larger heatsink that necesary ? < 0.2K/W
It can be harmful to use a larger heatsink that necesary ? < 0.2K/W
First One v1.2 to 1.3 modification
My reference quality FO. It can be used with or without the inductor on the speaker output.
The ground is in the preamp.
On the floor under the right channel you can see the burn marks of tantalum caps when they caught fire and fell on the chipboard.
Do I qualify?
My reference quality FO. It can be used with or without the inductor on the speaker output.
The ground is in the preamp.
On the floor under the right channel you can see the burn marks of tantalum caps when they caught fire and fell on the chipboard.
Do I qualify?
Attachments
Hi
Of course you are qualified to v1.3 upgrade.
So many qualifications shows that the First One is a true DIY survivor amplifier. 😀
L.C.
No Chassis. Only support for the coolers. All of the EMI from SMPS is free to depart. In a chassis it is forced to stay inside. Ha.😀
Hi
Of course you are qualified to v1.3 upgrade.
So many qualifications shows that the First One is a true DIY survivor amplifier. 😀
L.C.
Survivor it is. After watching it burn I was shure it had died.
One wire was broken and replaced by point to point soldering. Resoldering back the nichicon fg's it worked again.
But it was a good experience to see how sensitive are tantalum caps.
Hose4
To mi diši po CC izdelku.
You really should do some nice case for FO amp. It deserve it.
I can not congratulate your work.
But after all if you are satisfied, then it is ok.
Good luck ... that no cat is jumping into your amp when it is playing around the room.
Tantal are wery sensitive to opposite supply voltage...it explode and burns some material arround it.
To mi diši po CC izdelku.
You really should do some nice case for FO amp. It deserve it.
I can not congratulate your work.
But after all if you are satisfied, then it is ok.
Good luck ... that no cat is jumping into your amp when it is playing around the room.
Tantal are wery sensitive to opposite supply voltage...it explode and burns some material arround it.
Dear Androa76!
You are right. I had a nice VSSA CC version in original LC case. I was sold and it is now in use by a CC coleague.
Even my First One amp uses CC cable principle as much as posible, therefore eliminating the output coil.
I have to admin that the cases so far were not to my liking. The latest one with black plexy on the front buffle is very nice.
Since I still have to do the tests with regulated power supply vs SMPS, as I am not sure what I will use. Until this is finished I cannot order a case.
Should we start one? 😀
Problem is where to put it, in commercial sector or solid state? 🙄
Hi LC,
The first one is a 1/4W and the second one 1/8W, is that sufficient? I was looking at 1/2W as per your recommendations.
Thanks
Do