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PostPosted: 06 Feb 2011, 19:41 
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Joined: 06 Jun 2008, 18:23
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Location: Australia
Suncalc wrote:
mwhouston wrote:
rock4016 wrote:
You'll be playing tunes in no time!
:trumpet:

Mate donkeys to go!


Ok. Now I'm confused. :?

It's an Aussie expression and means Donkey's years. Donkeys live a long time so if you say donkey'
s years it means a long time. Donkeys for short.

And you thought electronics was hard.

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Projects:"Zeus" - Holton inspired 300W AB amp | "Pass F5 trubo” - dual mono high-end amp | “MWH” - 1920s UX-171A preamp | ”Image” - Low Profile 100W Class D amp |


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PostPosted: 07 Feb 2011, 17:13 
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Joined: 05 Jan 2010, 21:16
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Location: Las Vegas Nevada USA
mwhouston wrote:
I just received the two bases for the amp and PS. As yet they are roughly knocked together and require sanding and finishing. Not sure if I'll polyester, beeswax or oil stain the timber yet. The top plates will porbably be black.
Attachment:
BasesSS.jpg


Those look almost exactly like what I'm trying to build. I'm having problems cutting 45 diagonals where the sides meet - don't have the proper tools. I bought the aluminum sheet and the wood to fabricate it myself but it's turning out to be a lot of work.

Very nice.

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PostPosted: 07 Feb 2011, 17:36 
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That's why I get some one else to make them and just pay the money. These are rougher than are usually delivered. I may change my maker.

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Projects:"Zeus" - Holton inspired 300W AB amp | "Pass F5 trubo” - dual mono high-end amp | “MWH” - 1920s UX-171A preamp | ”Image” - Low Profile 100W Class D amp |


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PostPosted: 21 Feb 2011, 04:43 
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Took the orbital sander to the bases and after some further hand sanding got a good finish. The timber came up well, there are a few blemishes but hey! this is hand crafted stuff. I used a spray polyurathane satin finished which has sealed the timber well and brought out the grain within. This finish is quite tough when dry and requires no maintenance.

Next marking and drilling the top plates. The marking I can do through the week but drilling will have to wait 'till the weekend. Also spraying the top plates will follow.
Attachment:
BasesIIss.jpg
Attachment:
BasesIIIss.jpg


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PostPosted: 27 Feb 2011, 02:44 
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I posted a rough layout of the amp and PS a short time back. Now the bases are ready I am able to place the components on the top plate and mark their locations for drilling. One thing I did forget is the OPTs have 16,8 and 4 ohm taps. I will bring out the 8 and 4 ohm taps only. I didn't purchase enough speaker binding posts but this should not stop me from finishing the marking.

As you see the components, this is where they will finish-up. Also the power tranni was delivered raw silver metal. I have undercoted this and will spray it black in the next day or two.
Attachment:
LayoutBase1ss.jpg
Attachment:
LayoutBase2ss.jpg
Attachment:
LayoutBase3ss.jpg


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PostPosted: 27 Feb 2011, 03:54 
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Location: USA
Congratulations! Great work! I like Hammonds!

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Hi End is back proportional to the number of composite parts!
Projects: OTL 6AS7 Gen, Electric, SEs 2A3 RCA, 300B JJ, 6S4S, 4P1L, EL11 Telefunken, 6AS7 RCA, 6S33S, 6S41S, 6S19P, PP 6005 Gen. Ellectric , headphone ampl. OTL Loftin White 6AS7 RCA....SE E84L& E80CC Siemens&Tel-n.
http://azazello-sound.blogspot.com/


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PostPosted: 27 Feb 2011, 05:03 
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It seems hard to believe that 30W high current OPTs are required to get the best out of a 8W amp. We have Subcalc to blame for this - haha! Because the PS is seperate the OPTs take up most of the realestate. A small filament tranni resides in the hull of the power amp.

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PostPosted: 27 Feb 2011, 07:32 
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Location: USA
When amplifier will ready to listen?

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Hi End is back proportional to the number of composite parts!
Projects: OTL 6AS7 Gen, Electric, SEs 2A3 RCA, 300B JJ, 6S4S, 4P1L, EL11 Telefunken, 6AS7 RCA, 6S33S, 6S41S, 6S19P, PP 6005 Gen. Ellectric , headphone ampl. OTL Loftin White 6AS7 RCA....SE E84L& E80CC Siemens&Tel-n.
http://azazello-sound.blogspot.com/


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PostPosted: 27 Feb 2011, 12:57 
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azazello wrote:
When amplifier will ready to listen?

You think you would like to know when the amp will be finsihed. The poor owner has shelled out thousands and still has nothing to show for his money and patience. I would like to have this project behind me too. Not having a crack at anyone here just saying this has been a very long and slow project. Once the heavy components (power tranni, OPTs etc.) are mounted on the top plate of both the amp and PS, Wiring can begin. Drilling and spray the top plate first.

The part which takes the longest is getting to the point I am now. Though there is a lot of drilling and drilling of large holes, the end is finally coming closer. I will not say it is insight though. If I build one for myself I would use more easy to get components. Most of the parts for this amp I had to source from overseas. The power tranni had to be wound, luckily by a local.

I hope to have marking and drilling finished in the next 7 days.

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Projects:"Zeus" - Holton inspired 300W AB amp | "Pass F5 trubo” - dual mono high-end amp | “MWH” - 1920s UX-171A preamp | ”Image” - Low Profile 100W Class D amp |


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PostPosted: 02 Mar 2011, 05:48 
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This tranni came as raw and shiny steel. Now see the black "killer" tranni it has become.
Attachment:
300BTranni.jpg
Attachment:
BlkTranni.jpg


A single coat of acid etch primer and a single layer of Expoxy Enamel paint.


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