My error.
I point you to the Infineon part, at $1.80, in stock.
At these prices, the worst that can happen is that it's slightly less than
optimal. I should probably get some myself.
I point you to the Infineon part, at $1.80, in stock.
At these prices, the worst that can happen is that it's slightly less than
optimal. I should probably get some myself.
Hi everybody, maybe is not the good thread, I'm playing with the citation 12 from Tazz, as someone tried to separate power supply between low level signal and High Amperage part?
Hi Bangla H,
looking good! be nice to see the finished item ........ I hope the build was easy enough, I still have boards for sale if anyone else is interested!
looking good! be nice to see the finished item ........ I hope the build was easy enough, I still have boards for sale if anyone else is interested!
Merry Christmas to all
Thanks kramskee.
With good engineered boards is easy to work- only the 3pins are a bit tricky to
solder on one sided board- but all good.
The only missed part never arrived!-390p.
I have 330p FKP2 on hand- can i use that without significant influence?
Than i can report to an good old style- early Nelson Pass work- redesign. 😛
Regards Bangla.
Thanks kramskee.
With good engineered boards is easy to work- only the 3pins are a bit tricky to
solder on one sided board- but all good.
The only missed part never arrived!-390p.
I have 330p FKP2 on hand- can i use that without significant influence?
Than i can report to an good old style- early Nelson Pass work- redesign. 😛
Regards Bangla.
It should work. It might affect the frequency response a little but it should work. you can always swop it out when you get some 390's
Indipendent power supply C12
Hi,
Maybe tis is the correct Thread....
Before chopping the PCB Tazz made with no return back, I would like some help to go in the right direction.
I'm posting two version...and I'm not sure about DC...I've written 18v because I have a 18v transformer, for the Mosfets I have a 500W 24v.
Many thanks and Happy 2017
Hi,
Maybe tis is the correct Thread....
Before chopping the PCB Tazz made with no return back, I would like some help to go in the right direction.
I'm posting two version...and I'm not sure about DC...I've written 18v because I have a 18v transformer, for the Mosfets I have a 500W 24v.
Many thanks and Happy 2017
Attachments
left iteration is big no-no , R2 and Q3e needing to be on same rail
right iteration - if you're going to different rails for input side of amp , they need to be higher than OS rails
usually 5-6V is enough
right iteration - if you're going to different rails for input side of amp , they need to be higher than OS rails
usually 5-6V is enough
citation with p_n mosfet finished
Hi Kramskee.
Finally i could finish this project with last month received 390p styroflex cap.
Setup was running good. Only point the trimpot is a bit tricky if you have matched the point- with only little touch you are rising out.
What i like is the safe operating bias compensation- it is self bias down by warming up- so that little sinks doing his job 10-15° over ambient temperature.
I have start with 120mA, after full warm up it stays solid on 90mA with 10mA
offset.
The offset goes higher too with the bias.
First listening impression: a pleasantly playing amp. Solid bodied tonality with
light punchy bass (different to LatMos Fet).
A good candidate for longtime everyday entertaining with good image, my opinion.
No reason not to build a very compact amp.
Nice Weekend to all.
Hi Kramskee.
Finally i could finish this project with last month received 390p styroflex cap.
Setup was running good. Only point the trimpot is a bit tricky if you have matched the point- with only little touch you are rising out.
What i like is the safe operating bias compensation- it is self bias down by warming up- so that little sinks doing his job 10-15° over ambient temperature.
I have start with 120mA, after full warm up it stays solid on 90mA with 10mA
offset.
The offset goes higher too with the bias.
First listening impression: a pleasantly playing amp. Solid bodied tonality with
light punchy bass (different to LatMos Fet).
A good candidate for longtime everyday entertaining with good image, my opinion.
No reason not to build a very compact amp.
Nice Weekend to all.
Attachments
Wow that looks fantastic! What a great job, nicely done!
I'd like to see the finished product once it's all boxed
I know the trimpot is ultra sensitive, it crossed my mind to address this but I decided to keep it all standard as per Nelson Pass' original modifications.
For anyone else who's interested I still have PCB sets available
thanks for the update Bangla
I'd like to see the finished product once it's all boxed
I know the trimpot is ultra sensitive, it crossed my mind to address this but I decided to keep it all standard as per Nelson Pass' original modifications.
For anyone else who's interested I still have PCB sets available
thanks for the update Bangla
Thank you for kind answer, kramskee.
I was reading again yesterday Nelsons article....we now are back in 70's- nice.
And it's very attractive to see how simple could be drive HexFet in this circuit.
I forget to tell there is little short BUZZ when switch off the amp.
Yes a idea is in my head to build a nice pocket case, what can be placed on desk or make it easy to move with carrying handle.
Needs a bit time....time is the factor.
I was reading again yesterday Nelsons article....we now are back in 70's- nice.
And it's very attractive to see how simple could be drive HexFet in this circuit.
I forget to tell there is little short BUZZ when switch off the amp.
Yes a idea is in my head to build a nice pocket case, what can be placed on desk or make it easy to move with carrying handle.
Needs a bit time....time is the factor.
It's a great little amp,
I haven't encountered the buzz on switch off.
Time escapes me too, don't worry .............. it's always in short supply!
I haven't encountered the buzz on switch off.
Time escapes me too, don't worry .............. it's always in short supply!
Hi Everybody,
I Still have PCB's for this Amp if anyone is interested, have a look a at Bangla's post with pics of his completed amp PCB's if you want a visual of what it looks like
thanks
I Still have PCB's for this Amp if anyone is interested, have a look a at Bangla's post with pics of his completed amp PCB's if you want a visual of what it looks like
thanks
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