Swordfishy/ASPEN FETZILLA power amp

[PaulBysouth]

Both schematics fixed! Capacitor C6 was added at the last moment, and the rest relabeled, my checking wasn't very good I'm afraid.

Paul Bysouth.

[JKC]

Hugh,

Caps C11 and C12 have different values on your silkscreen, 100uF vs 220uF on schematics.

George

[JKC]

Hugh,

Polarity of C8 (C7 before changes) is not correct on schematics.

George

[AKSA]

Fetzilla pcb Group Buy Update - Now at 78 boards!!

2+P JoMo Adelaide SA Australia
2+P Ian Finch Coffs Harbour NSW Australia
2+P Gennaji Hyderabad India
2 Ken Lewis LA USA
2 Ron Russell Kent UK
2+P John Kenny Dublin Ireland
2+P Francis Morrin Dublin Ireland
2+P Vitalica Bucharest Romania
2+P Erik Deinum Groningen Netherlands
2+P Keith Correa ? India
2 Igor Polyakov California (city?) USA
2 Steve (aka SRH) Whangarei New Zealand
2+P George (aka JKC) Calgary Canada
2+P Anthony Mills Gold Coast Australia
2+P Dinesh (aka Chlorofille) Christchurch New Zealand
2+P Colin S. (?) (city?) NSW Australia
2 Chris Powell Sydney Australia
2+P Danny (?) Lierde Belgium
2 Sonnya (?) City (?) Denmark
4+P Jozua Cape Town South Africa
2 JT (? aka Sandyhooker) City (?) Arizona USA
2+P Nicola City (?) Vincenza Italy
2+P Sparkey (Brian ?) Melbourne Australia
2+P Chalkandtalk (?) City (?) NW England UK
4+P Woody1911a1 (?) Marblehead , MA USA
4+P George Cherhit Sacramento CA USA
2+P Tore Martensson Malmoe Sweden
2+P Steve Harrison Rock Springs WY USA
2 Kannan_S Austin TX USA
2+P NCC (?) Hanoi Vietnam
2+P VZS (Zsolt ?) Cluj-Napoca Romania
4+P Vitalica Bucharest Romania
2+P John Hambek Fort Worth TX USA
2+P Halcon83 City? USA
2+P Jonathon Rosser City? UK

I have attached:

#1 Parts list for ONE module, double for both
#2 Composite pcb layout gif showing latest changes.
#3 Pcb overlay LEFT side
#4 Pcb overlay RIGHT side
#5 Fetzilla circuit schematic
#6 Fetzilla power supply schematic
#7 Bottom foil layer of pcb
#8 Top foil layer of pcb

This is the latest edition, updated 22nd July 2011, and it incorporates all changes to this point.

This is, I believe, one of the most documented projects on this forum and I hope it gives a lot of people great pleasure. Many heads went into it and it was reasonably fast. Here's hoping..... nearly there.

As requested before, please, no money at this stage; I want to have all parts and boards and all address details BEFORE I despatch. I will contact people as a group in the Aspen forum when I'm ready to roll....

Cheers,

Hugh

[JKC]

Hugh,

Please correct polarity of C17 and C18 on schematics.

George

DONE HRD

[stvnharr]

Where are the Exicon Mosfets going to come from?
Profusion only has the p channel in stock.

There are some places that show some inventory, but they require large lot purchases, or have high minimum dollar order.

Are the 2SK1058/2SJ162 mosfets good for this amp? These are much easier to find.

[AndrewT]

All the Lateral mosFETs are virtually the same.

Some say the original Hitachi versions (both the To3 j50/k135 and the To247 j162/k1058) were better than the later versions. These are not easy to find and generally are not cheap.

Aksa has said that the ClassD versions may not be as good.
Swordfishy/ASPEN FETZILLA power amp
Swordfishy/ASPEN FETZILLA power amp
Swordfishy/ASPEN FETZILLA power amp


Best to read both threads for details that have been discussed in detail (to death).

[JKC]

Hugh,

Did you change values of R17 and R18 from 0.1ohm to o.15ohm? If yes, then you should correct schematics.

George

[hallcon83]

Hello Hugh, Please put me down for 2 Boards plus Parts - Thank You, Dean

[JKC]

Hugh,

Could you please make provision for bigger C13 and C14 caps on the PCB. There is only 5mm lead spacing on the board but most of the caps above 1uF have lead spacing between 15mm and 25mm. There is plenty of room on the board to accommodate bigger caps at this location. Thank you.

Regards,
George