F5 power amplifier

[EUVL]

If your question was meant for me, then both will do, except that for solution B, R5 and R6 must also be changed to 150R.

Solution A is easier to implement. I have been using solution B myself, for no particular reasons.


Patrick

 

[bobodioulasso]

Thanks, Patrick, for these precious infos.

 

[EUVL]

Pleasure.

Too few people in this place would ever bother to say thank you ....


Patrick

 

[Zen Mod]

this place is still much better than outer world ........

 

[Dennis Hui]

This article explains why you might want to degenerate the 2SJ74 to make it truly complementary with the 2SK170.


Patrick


.

Patrick,

Really interesting stuff. Thank you very much!

Cheers,
Dennis

 

[Blues]

Pleasure.

Too few people in this place would ever bother to say thank you ....


Patrick

I did and you threw me by the wayside...well frankly a little polishing around your rough manners will do you good.

I try to be SpongeBob every now and then.

 

[tinitus]

Layout design is ready

Now its just to order the last parts, and actually do it

 

[ljfont]

F5 Mods Listing

I'm near completion of an F5, It's currently a stock build.

Does anybody have a listing or highlight of all the F5 mods/enhancements. I have a couple days free to complete it. But I'm getting swamped reading all all 800+ posts. Sorry for being lazy, just trying to save some time.

Thank You.

PS. Posting numbers will suffice.

 

[EUVL]

Blues,

1) I was not referring to you.
2) I hate people using very single opportunity to advertise for their commercial activities. For me, it pollutes the thread.
3) I already indirectly advertised for you, in the interest of pointing people to a viable source.

Or should I have advertise for you by adding the link and the full details as well ?

You may have other opinions, I am allowed to have mine.
If you have a real first name, I'll address you every single time when I have a message for you.


Patrick

 

[Blues]

Blues,

1) I was not referring to you. Good!
2) I hate people using very single opportunity to advertise for their commercial activities. For me, it pollutes the thread. Which at times you do as well.
3) I already indirectly advertised for you, in the interest of pointing people to a viable source. To which I said "Thanks a lot!". If it wasn't me it's still okay.

Or should I have advertise for you by adding the link and the full details as well ? No, it's doing well without it.

You may have other opinions, I am allowed to have mine. Okay.
If you have a real first name, I'll address you every single time when I have a message for you. Okay.


Patrick

 

[EUVL]

> Which at times you do as well.

Count how many post I advertise for anything, compared to the post I made with real technical contents.

And I don't have a link to those at my signature.

Actually, I don't really need any of those "commercial" activities, at least not financially.
It's more for the pride than anything.

Let's leave it at that.


Patrick

 

[Blues]

Yeah whatever...I take it you at least once used my wormhole or you wouldn't know some details on my spreadsheet.

I know you don't care but I'll mention it anyway...I've also been developing the Curl Buffer (it's not the B1 by the way like Juma pointed out to you on the EB article).

 

[ljfont]

Okay, I made a mistake

For R1 to R8 I used 0.47ohms 3W instead of 1 ohm 3W, is that okay for filtering and power rating. It's kinda hard to desolder it now, the large capacitors are on the PCB.


http://www.diyaudio.com/forums/pass-labs/101993-pi-filter-clc-vs-crc-vs-c.html#post1212249

Thanks.

Never mind, was looking at an F1 PS schematic. Sorry....

 

[EUVL]

> it's not the B1 by the way .....

The attached circuit was published in one of John Curl's threads on this forum in May 2006.


Patrick

 

[EUVL]

The other one referred to in the Borbely article is John's complementary follower, which has a lower output impedance (of around 20R) but a much higher input capacitance of approx. 40pF, compared to 6pF of the SE version.

.

 

[LucasAdamson]

Blues,

1) I was not referring to you.
2) I hate people using very single opportunity to advertise for their commercial activities. For me, it pollutes the thread.
3) I already indirectly advertised for you, in the interest of pointing people to a viable source.

Or should I have advertise for you by adding the link and the full details as well ?

You may have other opinions, I am allowed to have mine.
If you have a real first name, I'll address you every single time when I have a message for you.


Patrick

Blues' selling of matched fets on DIYAudio is a service in my opinion, and a hugely welcome one for many many people on this forum. He's hardly making a living out of it.

Most of the time it's generally considered better to be courteous - you talk of "polluting the thread". Well there's absolutely nothing more polluting than this kind of debate - take it to private messages if you want to continue - nobody else cares!

 

[LucasAdamson]

Layout design is ready

Now its just to order the last parts, and actually do it

Is brown = wood?

If so, awesome!

So you'll have a metal plate between AC & DC?

Also, raised heatsinks - cool!

 

[jacco vermeulen]

More pollution : thanks for all the shared efforts before august, Mr Patrick ...

 

[EUVL]

Graag gedaan.

Patrick

 

[Renron]

MOVE ON,.... BEFORE THE FORUM POLICE LOCK THIS THREAD

Ron