Can the active pre run on +/- 13v? (SLA power my SI T-amp and it would be nice to do the same on the pre)
Can the gain be increased to ~6dB? (PLLXO causes some insertion loss in my bi-amp system....)
Thanks,
Thomas
Can the gain be increased to ~6dB? (PLLXO causes some insertion loss in my bi-amp system....)
Thanks,
Thomas
more info
The pre amp is described here:
http://myweb.tiscali.co.uk/nuukspot/decdun/gainclonepre.html
The voltage is specified to 15+ v - but what about 13v....
Thomas
The pre amp is described here:
http://myweb.tiscali.co.uk/nuukspot/decdun/gainclonepre.html
The voltage is specified to 15+ v - but what about 13v....
Thomas
output impedance?
What's the output impedance of this pre amp?
There is a 100k resistor between output and ground 😕
is this correct?
Thomas
What's the output impedance of this pre amp?
There is a 100k resistor between output and ground 😕
is this correct?
Thomas
please comment......
I could just build it and see...... BUT I would prefere some gain....
Thomas
I could just build it and see...... BUT I would prefere some gain....
Thomas
The 100k doesn't harm but would do anything either i think.
13V supply should be OK with possible a little less output level - but still enough to wildly overdrive your GC!
This is a buffer (if I got the right diagram on the site) so no gain, I'm afraid. You really need 6dB gain? How about just turning up the vol control a bit further, or rather turning it less far down?
Jan Didden
13V supply should be OK with possible a little less output level - but still enough to wildly overdrive your GC!
This is a buffer (if I got the right diagram on the site) so no gain, I'm afraid. You really need 6dB gain? How about just turning up the vol control a bit further, or rather turning it less far down?
Jan Didden
Correction: The 100k ensures the output floats to gnd if connected to a capacitor-coupled power amp input.
Beat me to it! 😉
ThomasS, you may find that with the buffer in between the volume control and class-T amp that you don't actually need the extra gain!
PLLXO...
The passive line level x-over causes quite a bit of attenuation but I'll give it a try 🙂
The passive line level x-over causes quite a bit of attenuation but I'll give it a try 🙂
Then go active! It's not really difficult. If you want to keep with the Les Sage buffer concept, then try these .
Hardly any more work than the buffers and you have your crossover filters as well! 😉
Jan - yes, lucky to corrected that one. I've seen people shot on this forum for lesser mistakes! 😀
Re: PLLXO...
Aha! I was wondering what a Phase-Locked Loop Xtal Oscillator had to do with it....
Jan Didden
ThomasS said:
Aha! I was wondering what a Phase-Locked Loop Xtal Oscillator had to do with it....
Jan Didden
- Status
- Not open for further replies.