Patrick, I am very very happy with the result
The amplifier is .... SUPER!!!
Thanks very much for your help!
Vitali
Attachments
The heatkins is 400x160x83mm.
U = 15V, Bias = 2A (4A total)
Maximum temperature heatkins - 48...50 degrees (room is 26 degrees)
Transformer - 2x13V/800W
MUR 3060
CRC : 2x47000-0,15R-2x47000
Regards,
Vitali
It's balanced amplifier Patrik (EUVL)
I thank you very much!
I measured the power, but I certainly have 50W / 8
vitalica
50watt@8ohm for class A is awesome!
Your build is following exactly on this?
2X13V? isn't the supply of the Vac should be around 16+/- to get a +/-23Vdc?
can u explain more in this? i just need to learn more.
I agree with Uriah
To get 2A bias voltage must be smaller - 15 ...16V.
I want to share some more impressions for the f5.
As I said I use large skins, so after many hours the temperature stays to about 40oC, so after reading I started playing with the bias...
0.60v >>> 40oC >>> 65oC (mosfet)
0.71v >>> 43oC >>> 80oC (mosfet after 30min)
The weird is that the two of this positions gives a different sound!
The big difference was in the bass area and the mids (I beleive highs were the same)
So my results,
in 0.60v I had a huge, great bass (the midbass was thin), the mids were little behind and the highs were very good
in 0.71v the bass gone away but the midbass became huge, the mids left the veil and became huge (I liked them, but where is the bass), the highs also had a little better volume.
now 0.65v and here are all, perfect balance for all.
Anyone with the same experience?
As I said I use large skins, so after many hours the temperature stays to about 40oC, so after reading I started playing with the bias...
0.60v >>> 40oC >>> 65oC (mosfet)
0.71v >>> 43oC >>> 80oC (mosfet after 30min)
The weird is that the two of this positions gives a different sound!
The big difference was in the bass area and the mids (I beleive highs were the same)
So my results,
in 0.60v I had a huge, great bass (the midbass was thin), the mids were little behind and the highs were very good
in 0.71v the bass gone away but the midbass became huge, the mids left the veil and became huge (I liked them, but where is the bass), the highs also had a little better volume.
now 0.65v and here are all, perfect balance for all.
Anyone with the same experience?
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My english is not good enough, in addition I can not express my thoughts correctly... I agree with "are shifted by the emergence of midrange and top end" everything is around balance and I tried to describe it, my speakers are ob (bass rolloff )
Yes I get excited with small changes!
Yes I get excited with small changes!
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