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Old 21st October 2011, 04:59 PM   #41
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Default Newbie Question

I'm new to DIY AKSA but am assuming this fetzilla kit is a replacement board for existing owners of the GK-1 preamp. Is this correct?
Thanks, I'm looking forward to my first project.
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Old 21st October 2011, 07:02 PM   #42
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Quote:
Originally Posted by madtownmacdaddy View Post
I'm new to DIY AKSA but am assuming this fetzilla kit is a replacement board for existing owners of the GK-1 preamp. Is this correct?
.
no that is incorrect . it is an all fet power amp . and if Hugh doesn't reply for a few days it's because he's away at an audio trade show .

cheers Woody
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Old 21st October 2011, 08:58 PM   #43
AKSA is offline AKSA  Australia
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MacDaddy,

Woody is 100% correct; it's NOTHING TO DO WITH THE GK1!!

I am in fact working on a replacement for the GK1, and have it nearly ready (in proto testing right now) but it won't be sold as a kit, only as a module, built and tested.

The FetZilla is not my design at all, I had some influence, but it's the brainchild of Greg, aka Swordfishy, with original inspiration by Lineup. It is an inexpensive way of getting into the high end all fet market at low cost with a professionally designed pcb.

Hope this clears it up, and many thanks to Woody..... and yes, I'm at the Melbourne Audio Show, organised by Brits actually, from Chester, and clearly focussed on audiophiles, the first show of it's type in 15 years in my town. (Something of a disgrace, no Oz organiser thinks audiophiles are worth the trouble, apparently!).

Here's the FetZilla GB2 list up to the minute, presently at 54 pcbs:

4P Sonocon Germany
4P Woody MA USA
4P Col_S Thirroul NSW Aust
4P RKH CO USA
2P Syklab HK China
4P Taniknight Safety Beach Victoria Aust
2P Sasha UK
2P PeteMcK Sydney Aust
2P Eparsons Woodinville WA USA
2P Ipolyakov CA USA
4P Mohora NY USA
2P Johnny2Bad ? Canada
2P Peter Rekkers The Hague Netherlands
2P Tome Macedonia (payment?)
4P Westley Matthews NC USA
4P TG3 Seattle WA USA
2P Ray MD USA
2P KP93300 Malaysia
2P Meanman1964
2P Pinnochio


Thanks Woody for your input,

Cheers,

Hugh
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Last edited by AKSA; 24th October 2011 at 04:15 AM.
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Old 21st October 2011, 11:42 PM   #44
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Thanks Hugh and Woody. This looks like the perfect project to start with. Will it be possible for me to add multiple inputs and a phono stage to this project, similar to the GK-1M offering?

Enjoy the Audio Show Hugh.

Cheers,

MacDaddy
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Old 23rd October 2011, 07:07 PM   #45
syklab is offline syklab  Hong Kong
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Hi AKSA,
Do we need to wait until it reaches 100 before production starts?
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Old 23rd October 2011, 10:33 PM   #46
AKSA is offline AKSA  Australia
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No, Syklab, I will be pulling the lever this week!!

MacDaddy,

What you suggest is in fact an integrated amp, with source switching and level control integrated into the amp.

This is how the majority of mid-fi Japanese and Chinese amps are configured these days, and it means you don't formally need a preamp, an expensive affair often made with phono inputs, tape loops, and all the palaver.

You can make the FetZilla in this way, but you would need expertise to configure the switching (the switch quality is VERY important!) and you would need to buy a very good attenuator - I would suggest a switched attentuator from Elco or Goldpoint or DACT. There is quite a lot of work in this endeavour - it's just switching and a 'pot', but there is a lot of wiring and it would be up to you. The pcbs supplied have only the power supply and power amp on board.

The audio show was very good and my amps and Frank's speakers really did attract a lot of attention. Some even said they thought it the best sound there - don't know about that, but it was certainly up there, particularly for resolution and involvement.

Hope this makes it clear,

Cheers,

Hugh
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Old 24th October 2011, 01:53 AM   #47
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Hi,

Two boards with parts for me!

Thanks
Do
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Old 24th October 2011, 04:10 AM   #48
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Default AH Fetzilla...

Need some advice..having some problems with solder flow on gold surfaces.Perhaps they need cleaning. What might be the best approach ?? Using
Kester solder . Is there a recommended solvent ??

Thanks for good advice.......
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Old 24th October 2011, 04:15 AM   #49
AKSA is offline AKSA  Australia
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Sandyhooker,

Gold plating is the easiest of all things to solder. I'm not sure why there is a problem, but I would not use steel wool or chemicals.

I think the problem might be the solder, and perhaps the heat on the iron. I use Multicore 0.71mm thin 60:38:2 tin/lead/silver, and have no problem at all. You only touch the surface and it wets almost immediately.

SH, I'd suggest that Kester might be hard to apply, and that a change to plain, good quality 60:40 is worth a try.

And check your iron is nice and hot, with a very clean tip.

Hope this helps,

Hugh
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Old 24th October 2011, 04:38 AM   #50
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Quote:
Originally Posted by pinnocchio View Post
Hi,

Two boards with parts for me!

Thanks
Do
When and where is payment required?

Thanks
Do
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