So who here was lucky enough to get one of the LisaIII DIY boards?

[oicdn]

I was reading as how this was initially going to be a kit option until it was marketed as a complete amp by Triad Audio. But I remember reading that some people that pre-ordered the board when it was initially available as such, got them.

I'm just wondering if anybody on here was lucky enough to get one of the LisaIII boards and implemented any changes (different caps, volume pots, etc) than how the LisaIII is currently configured and how it varied the sound from it's current state.

So don't mistake this as a clone thread, since the boards were infact released by the manufacturer and for sale.

 

[holland]

Wow, I haven't heard about that. I asked PPL and he said, maybe, no guarantees of the PCB being released as a separate buy.

 

[oicdn]

I remember the group buy for this was quite a long time ago, I just NOW thought about it, and also thought about seeing what variations people did to it.

I know only a limited number got them, just curious to see if any body is going to speak up

 

[amb]

AFAIK only completed amps were/are sold. Phil did mention that some blank boards were to be released for DIY but I don't think it happened yet.

 

[oicdn]

Ahh..I thought it already happenned since the discussion of this amp was mid-2006...

Figured some people already had it and just implemented thier own components for a varied sound form the production model...

 

[itsborken]

LisaIII was released this summer.

 

[Ferrari]

There was an interest check an half year ago but that discussion seems to be dead since May 2007.
No single blank board has been released for DIY yet. If it will ever happens... time will learn.

 

[NelsonVandal]

I've made a stripboard LISA, since boards aren't available and I wanted a smaller sized amp. Everything isn't the right spec's. I use 2N5486 instead of J310, only 2x100 uF rail-to-rail caps instead of 3x100 uF, 47 uF rail to ground caps instead of 100 uF and MJE243/253 instead of BD139/140. Caps are OS-CONs. Resistor values are lower, about the same as suggested by Walt Jung in the famous article. Everything looks like a mess since this amp wasn't built to be a LISA from start, and it's been rebuilt many times before.

The only tweaks I've applied after it was finished are ground channel opamp rolling and buffer rolling and adding rail to rail caps. AD829 as ground channel opamp is crucial for the tonality. Amps like AD744 comp pin out and AD825 makes it too harsh, OPA551 is too dark. AD829 is very smooth and balances the slightly bright and harsh sound of the comp pin out wired AD744 (normal pin out is softer but less detailed and less exciting).

I have buffers with BD137/138 as output transistors but without "the always on tweak" with CCS to emitters. They are warmer and have a more prominent bass. The buffers with MJE's are more 3D.

Adding an additional 2200 uF cap from rail to rail doesn't affect the sound at all. I've done this while playing.

If you want the LISA sound and don't care for portability, I guess a PPAv2 could be tweaked to be a perfect clone.

 

[NelsonVandal]

Some more mods if anyone is interested. AD797 in L/R and LM6171 in ground has a more neutral tonality, is smoother and more non-fatiguing. The price is a little bit less of that fantastic soundstage and energy, but I like this better. LM6171 isn't the greatest opamp but it's better than AD829 together with AD797, because AD829 is to dark.

 

[flashbak]

Nate,
As far as I know the boards separately never became available.