fab said:
You can install degeneration resistors to improve the linearisation of the input diff. stage.
please,clarify that little- I'm more sort of tube afficionado,but without too much subtlety for SS ........
TIA
A few other things to do
I've got one of these as my second system preamp. I did the following, pretty much all together, and it made a very rewarding difference:
Replace all polarized caps in the signal path and some others with poly films: C11, C13, C14, C17 bypassed, C20. [Didn't aplter the phono section, as I don't use it].
In the power supply, replace C24, C25 with a low ESR 4,700 uF cap, C27 and C28 with 220 uF and film bypass.
Norman
I've got one of these as my second system preamp. I did the following, pretty much all together, and it made a very rewarding difference:
Replace all polarized caps in the signal path and some others with poly films: C11, C13, C14, C17 bypassed, C20. [Didn't aplter the phono section, as I don't use it].
In the power supply, replace C24, C25 with a low ESR 4,700 uF cap, C27 and C28 with 220 uF and film bypass.
Norman
choky said:
please,clarify that little- I'm more sort of tube afficionado,but without too much subtlety for SS ........
TIA
I can not explain it better than on the Douglas Self site: http://www.dself.dsl.pipex.com/ampins/dipa/dipa.htm#5. Check particularly section 5.1 for input stage linearity wich includes the degeneration resistors advantage (more constant gm).
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
- Home
- Amplifiers
- Solid State
- Hafler DH 101 preamp mods