Swordfishy/ASPEN FETZILLA power amp

[mikelm]

Originally Posted by taniknight

Hugh, et al.

Are there any other (cheaper) options

Available cheaply here:

ECX10N20R

and here:

ECX10P20R

Enjoy !

[syklab]

Originally Posted by mikelm

Available cheaply here:

ECX10N20R

and here:

ECX10P20R

Enjoy !

Very reasonable price!

[AKSA]

Thanks Mike!!

Agree, a very good price, even with shipping across the globe.

Hugh

[taniknight]

Thank you everyone for your help here.

Mike, I was alerted to Profusion just last night through Rod Elliott's ESP webpage... his P101 power amplifier uses the 2SK/J or 10N20/P20 compliments and Profusion is his suggested source. Yes.... cheap!

Procuring components is by FAR my least favourite part of this hobby. I was at the computer for nearly 5 hours yesterday, scouring through listings on multiple sites for FETZilla parts... not even exotic ones, just appropriate is satisfactory at this stage.

Anyway, the outputs are about the last parts that I still need and I can start constructing a test bed.

Thanks again everyone.
Tani.

[Woody1911a1]

Originally Posted by taniknight

Procuring components is by FAR my least favourite part of this hobby. I was at the computer for nearly 5 hours yesterday, scouring through listings on multiple sites for FETZilla parts... not even exotic ones, just appropriate is satisfactory at this stage.

.

yes but wasn't it satisfying when you finally found them ? kinda like .... nevermind . back on topic

[AKSA]

Folks,

Been a long time.....

Recently I was in Brisbane for a week and went to see Swordfishy (aka Greg!).

Brisbane is around 1250 miles (2000 kms) north of Melbourne for those whose Oz geography is rusty... its more than two hours by A320.

He is an absolutely terrific guy. He graciously received me and my friend and gave us great coffee and a tasty Danish pastry. We chatted about all sorts of things, then repaired to his shed where he is considering installing a Buick 3.8l V6 into a pristine '88 BMW 318. Great project, Greg!!

Now, do we have anyone here who would like to give his listening impressions of the great and magnificent FetZilla?

Love to hear any views, really would......

Cheers,

Hugh

[ajst2duk]

Still listen to mine every day

[GregH2]

Hi Hugh,

I haven't been on these forums much in recent months but as with most of my hobbies it seems I am returning to audio yet again, and hence am back and just saw your post.

It was great to have you up here and to finally meet you in person. Not sure the coffee was good, but the Brumby's bakery sure did a good job of the pastries!

Thanks again for making the effort to visit and for sharing some of your new and not so new ideas. I'm looking forward to seeing where you take them. As usual your infinite knowledge on practically any subject from electronics to engines and philosophy was inspiring.

I'm currently working on a new design using transistors and vertical fets. Mostly because I want a little more power and freedom from the use of exotic parts.

I have to say that trying to get vertical fets to work well in a simple circuit just illustrates how nice the lateral devices in Fetzilla are. Being able to drive them with only a few mA, and being able to completely dispense with temperature compensation is such a bonus. Using vertical fets generally requires a minimum of 3 extra active devices - drivers and Vbe multiplier. Things don't get much simpler or stable than Fetzilla and it's amazing that so few parts can come together in such a harmonious and effective combination.

[pinnocchio]

Hi Hugh,

Many months past since I have purchased the FetZilla but I can honestly say that I'm almost finished with the chassis!

Well, it is actually a dual amp chassis... I had bought a very large chassis to put in a ML-2 clone (Class A biased at 1 amp runs really hot...). Because there was so much space in the chassis I decided to do something original and put in the FetZilla and ML-2.

Of course they won't run at the same time due to massive heat issue that would arise BUT there's a master selector switch in the back and then I can power everything using the front momentary switch (using the AMB switch driver with Solid State Relay and temperature sensor for heatsink)

Here's a peek of what it's going to look like...



Back panel


Transformer section that will be covered to hide wires


Transformer cover with PSU for ML-2 (the cable layout has changed slightly since last night...)


Sorry this one is blurry... Wires will all be nicely tied up in the end...


So there it is!

BTW, I'd love to take those board I left you last time if you still have them... Please PM me.

Thanks
Do

[ratbagp]

Last weekend I visited Greg (aka Swordfishy and GregH2). I took at few photos that you can see at
Bottlenecks Audio: Visiting Swordfishy (aka GregH2)

It's always interesting to meet people who you know from forums and my experience is that they are always friendly and willing to share their experience and knowledge. Greg is no exception.

ray