LuFo Amp - 39w SE Class A from 28v Rail

[nicoch58]

Yes, Vunce. 70mH, 5Adc and max 0,7 Ohm Rdc with frame. Maybe for 30 pairs the same price.

what iron laminate ? ie we can have a better one with small charge ? to US will be cost more the shipping...

 

[peppennino]

I can ask...

 

[marconi118]

Yes, Vunce. 70mH, 5Adc and max 0,7 Ohm Rdc with frame. Maybe for 30 pairs the same price.

Great Peppe! Maybe they can make it even lower price without frame?
I am in for at least 2 pairs
Do they have any picture and the specs of core material?

 

[xrk971]

Depending on the cost of shipping I would be in for 2 pairs also. I think just having an EU option is great as we have MOT option in USA already.

 

[peppennino]

I'm waiting for informations from Fiat. I can ask to Alfa Romeo too
Seriously, if they (or we 'talian diyers) can ship in EU and Extra-EU at honest prices, we can start a GB

 

[xrk971]

A GB for the inductor would make the LuFo truly accessible for everyone. Thank you for your efforts to do this. I might even be up for a lot more of the inductors if the shipping is reasonable. Maybe 6 pairs even.

 

[nautibuoy]

...we can start a GB

Just to register my interest.

Maybe mention this on the MoFo thread (and perhaps one or two others)?

 

[xrk971]

Yes, and start a new GB in the GB forum if it’s ‘cross platform’ compatible for MoFo and LuFo, and other amps. I have seen several choke loaded SIT threads.

 

[xrk971]

Some progress by JPS64 on an Aksa Lender front end board for the LuFo. This one will use an on-board 55Vd DCDC converter. We will see if it is possible to make the DCDC converter in TH also.

 

[peppennino]

Yes, and start a new GB in the GB forum if it’s ‘cross platform’ compatible for MoFo and LuFo, and other amps. I have seen several choke loaded SIT threads.

Ok, I begin by maing a post on MoFo Thread

[EDIT] Done. Link to MoFo discussion

 

[audiodesignguide3]

Is there a simulated data about Zout because cascode will increse this value.

 

[rpafenberg]

I ordered a MD-903AMS-1 and received a MOD labeled Samsung SHV-UT1136AA. Before I send it back as the wrong product, is it a different designation for the same item? I didn't find anything on google to indicate a match but I could have been looking in the wrong place.

 

[peppennino]

Hi Peppennino,
I must have missed this? Do you have details/specs of the chokes?

Core: Fe-si 1,3w/kg Thickness 0.5mm column, 28 box 40 dimensions: 87mm X 75mm x 75mm, weight 1,9kg each

 

[audiodesignguide3]

This should be good

Hammond 195T5
Inductance: 100 mH
D.C. Current: 5A
Resistance: 0.64ohm
Weight: about 5Kg
Dimensions: 95(h) x 117(l) x 120(d) mm

 

[peppennino]

Yes, we talked about that hammond that some posts ago. The aim of a possible GB is to reduce the cost to make the LuFo accessible to all. Hammond's are 170€/pair, Fiat 59€/pair

 

[audiodesignguide3]

Someone have the files for the LTspice simulation ?
I would like to check the Zout value.

 

[xrk971]

Is there a simulated data about Zout because cascode will increse this value.

The predicted DF was 156 at 50Hz. Or Zout circa 6mOhm.

Someone have the files for the LTspice simulation ?
I would like to check the Zout value.

I am not near my computer to post the file. However, this amp is so darn simple,
you should be able to type it in 10minutes. The model for the LU1014D is there at the bottom. Nothing missing if you have Cordel models.

 

[TungstenAudio]

Well, it seems I got screwed by Aliexpress. One of the recommended suppliers sent me a mix of what are obviously different parts, all wrapped in a nice sealed strip. But at least three styles of plastic molding and different position of the text on the plastic. I really hate having to do full testing of each part, just to find some genuine LD1014 that may have accidentally been included.

 

[wowbagger]

One of the recommended suppliers sent me a mix of what are obviously different parts, all wrapped in a nice sealed strip.

Same here. Just got some in yesterday.

 

[albertli]

X, where I can find the adapter for the 1014? Thanks
Albert