I usually mount trafos with rubbers
Even the slightes "buzz" is "amplified" by the box
With rubbers it should become completely inaudible
If not, its no good
Trafos should definately not be heard at all
But it sounds like you have tried all thats possible
When you say "hum", I hope its not from speakers
And its both trafos, and not just one
My favourite
My wife keeps wondering how those things keep disappearing from the kitchen
"decoupling"
Are you talking about the same
The suggested looks just like a "small" onboard 1000uf supply cap to me
Will that be fit fore classA? one reason I may have my doubts about such
Without knowing enough about, I would rather try and have the main supply caps closer to amp curcuit
"more stable" ? maybe best not say that
Are you talking about the same
The suggested looks just like a "small" onboard 1000uf supply cap to me
Will that be fit fore classA? one reason I may have my doubts about such
Without knowing enough about, I would rather try and have the main supply caps closer to amp curcuit
"more stable" ? maybe best not say that
Well that is what decoupling is. But it is true that NP has expressed strong opinions against decoupling on the F5.
I would assume that this is highly dependent on the actual implementation, but since decoupling can give you better high frequency performance at best, I think it is very much irrelevant for this amp, unless you as jack use it in the ham bands.
I would assume that this is highly dependent on the actual implementation, but since decoupling can give you better high frequency performance at best, I think it is very much irrelevant for this amp, unless you as jack use it in the ham bands.
Oh, I thought "decoupling" was about small filmcaps
But ok, I see it now, theres a small 20ohm resistor added, in the suggested schematic
I my "common logic" and understanding of english, "DEcoupling is the resistor, more than the exstra cap, I guess
Well, I admit to have suggested similar a while back, to have seperate supply fore jfet
And it was explained to me that jfet and outputs are so very closely coupled, so that any differential imbalance from supply may cause severe problems
But ok, I see it now, theres a small 20ohm resistor added, in the suggested schematic
I my "common logic" and understanding of english, "DEcoupling is the resistor, more than the exstra cap, I guess
Well, I admit to have suggested similar a while back, to have seperate supply fore jfet
And it was explained to me that jfet and outputs are so very closely coupled, so that any differential imbalance from supply may cause severe problems
Rjc of those TO-220 Fairchilds is already over 1C/W, but Rjc + Rcs can get messy with insulators.
Only way to keep temperature of the dies under 100C would be to mount them either straight to the heatsink or use an L-bracket with a large mounting area on the heatsink side.
(for 24Vdc rails and 1.3A bias)
Only way to keep temperature of the dies under 100C would be to mount them either straight to the heatsink or use an L-bracket with a large mounting area on the heatsink side.
(for 24Vdc rails and 1.3A bias)