X-Altra Line Level Preamp

[brianco]

@Bonsai

Any projected date for availability of pcb for your new version of this pre-amp?

[I am sure your new pre will maximise the potential of my KX2....which is a brilliant power amp 👌- even with
the above pre which was built by a confirmed tweaker?]

 

[Bonsai]

Hi Brian, I'll probably start in late Feb - It will be a single board that will fit into the existing X-Altra Mini II Housing. I think a lot of folks balked at the inter-module wiring hence the alternative approach.

 

[brianco]

Thanks Andrew,

I listen a lot to BBC Radio 3 music programmes. A constant source of annoyance is the BBC's total disregard
for phase and even correct L-R channel positioning. They blame the 'phone company whose lines carry the BBC
programmes to the local relay stations.

Would it be possible to have phase and channels switchable without increased design problems/vast cost implications?

Thanks again,

Brian

 

[geoffw1]

I think a lot of folks balked at the inter-module wiring hence the alternative approach.

I'm happy with the modular approach but tend to balk at the hard wiring approach. My preferred wiring uses the likes of Molex KK 254 board connectors

(similar ones are available from other manufacturers)

 

[Cyberpup]

What I have balked at is the price of a Molex crimp tool. Almost $500 with tax and shipping.

 

[geoffw1]

My £20-30 repairman's crimp tool does just fine. Just takes a little practice. Here's something similar

 

[Bonsai]

If you pretest the boards and make sure they are working correctly, hard wiring should be easy. That said, I understand why it is a big project. The ‘big board’ will streamline the design.

 

[Bonsai]

Thanks Andrew,

I listen a lot to BBC Radio 3 music programmes. A constant source of annoyance is the BBC's total disregard
for phase and even correct L-R channel positioning. They blame the 'phone company whose lines carry the BBC
programmes to the local relay stations.

Would it be possible to have phase and channels switchable without increased design problems/vast cost implications?

Thanks again,

Brian

Brian, yes - I will add that feature.

 

[brianco]

Thank you Andrew.


👍

 

[Chrisr3521]

@Bonsai I'm going to test the phono board but am stuck on the pin numbering on U4 pin one obvious, but the rest?

 

[hadihf]

page 26 of manual

 

[Bonsai]

Chris, see the picture below. For MM link 1-2 and 5-6 and nothing else. For MC, link 1-3 and 5-7 and 6-8 and 2-4

you can get the 2.54 mm pin header shorting links from RS, or better still off Amazon.
regards

Andrew

 

[kedar110]

Hi Bonsai,
I made a purchase from your store yesterday. I have no order confirmation from you. Are you working?

 

[brianco]

Are you working?

@Bonsai - a few days ago - on another thread - posted that he would be away for a few days. I am sure that you will hear from him soon.

 

[Bonsai]

Hello I'm back!

Radek, your board will be dispatched tomorrow.

Regards

Andrew

 

[kedar110]

All right, Thank you

 

[Bonsai]

 

[wirewiggler]

Bonsai,
Loving the preamp but it still has some bugs and I need to open it up to make some changes. I will add the inductor to the headphone amp to keep it current though I use another external headphone amp. When I use the balanced out it pops when I mute the volume, I did not ground the balanced plugs to the circuit board so I need to see if that fixes it ( though again I use the single ended out mostly) and most annoying when I touch the unit and there is any static discharge the unit switches itself off, any advice would be appreciated.
Thanks
Bill

 

[Bonsai]

Hi Bill
I am travelling but back home mid next week and will then ping you re your problem.

 

[Bonsai]

Hi Bonsai,
I made a purchase from your store yesterday. I have no order confirmation from you. Are you working?

High Kedar10, can you confirm what you ordered then I can check for you? Apologies for any problems.
Regards
Andrew