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First Amp Done (Read 3349 times)
mboxler
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Posts: 85
Re: First Amp Done
Reply #15 - 02/15/13 at 16:09:20
 
Hi John

Second amp is going slow.  I received the repaired chassis Christmas Eve from Keith, the guy who built it to begin with.  He did a great job.  A few days later, I noticed his listings had been pulled from Ebay.  I e-mailed him, just to make sure all was okay.  No response.  Eventually, I Googled his name, and his obituary popped up...he passed away Christmas day.  Although I had never met him, I was saddened.  The repair of my chassis was one of the last things he did before passing.  Every time I tried to start drilling into the repaired chassis, I choked up.  Strange how you can develope a relationship with someone without even meeting them.

Anyway, I'm slowing getting to the second amp.  Unfortunately, the first amp seems to have a problem...highs are getting very grainy.  I wonder if I damaged it more than I thought.  I hope the second one sounds okay, then I'll redo the first.

I'm using a 6N1P-EV in front.  What are you using?  How's your amp sounding?

Mike
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jpv
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Posts: 110
Re: First Amp Done
Reply #16 - 02/15/13 at 18:50:10
 
Wow that is horrible to hear. Sad That will make this amp even more special.

I am using a 6JD8 right now. I will substitue a 6922 after I do more listening with the 6DJ8.
The amp sounds really good I am very happy with it right now.
I did hook it up to my main system but I think it doesn't like my pre amp too much, I was getting a strange hum that was more of a growling sound, It startd off low them gets louder then it stop. and repeat. It did this in a period of about 1 second. It also changes in loudness with the volume control. When I hook it to my PC all is OK.
Maybe I am over driving the front end.
Life is too short not to listen to great equipment.
ITFWSWC
John
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VPI Scoutmaster, Grado Sonata1, Counterpoint pre amp and amp (modded by Altavista Audio), Proac sp. and home made subs. Lots of room treatment. Anti-cable sp cables, Decware IC, ZKit 1.
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Real
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Re: First Amp Done
Reply #17 - 02/24/13 at 00:55:19
 
Hi Guys,
I just finish my amp.
I have not tried it yet, maybe tomorow?
I want to make sure one more time, to check all the  conections
before I power it up.

Wish me luck.
Here is a couple photos.
Real
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GEDC0008.JPG
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Real
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Re: First Amp Done
Reply #18 - 02/24/13 at 00:57:53
 
Here is the back
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GEDC0006.JPG
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jpv
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Cause inside
everyone is a heavy
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Posts: 110
Re: First Amp Done
Reply #19 - 02/24/13 at 16:46:46
 
Real,
  Nice job. I like the Decware sticker you have on the back.
How did you do that?
  Can we see a picture of the insides?
I know when I powered mine up for the first time it made me nervous.
Click the button and stand back and wait. I have two stitches on mine one for the heaters and one for the power. I haven't had much problem with mine. I put in a 6922 in place of the 6DJ8. I like the 6DJ8 better so I will put it back.
Good luck and Happy listening.
John
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VPI Scoutmaster, Grado Sonata1, Counterpoint pre amp and amp (modded by Altavista Audio), Proac sp. and home made subs. Lots of room treatment. Anti-cable sp cables, Decware IC, ZKit 1.
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Real
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Re: First Amp Done
Reply #20 - 02/24/13 at 19:11:04
 
Hi John,

Turn it on this morning.
Voltage were fine except for one of the D location,number 8
Pin was off.
Plug in the CD player and an old pair of
Boston acoustic HD9. Great sound out of one channel.
Low volume on the other. upon closer look
I notice I Touch one of the capacitor with the soldering iron
when I was soldering one of the blue and white wire on the
output transformer. I have ordered a replacement.
Hopefully that is the only damage.
I'm very impressed with the sound.

I'll get more photos on later.
The logo was taken off the web site and printed on clear label stock.


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jpv
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Cause inside
everyone is a heavy
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Posts: 110
Re: First Amp Done
Reply #21 - 02/25/13 at 00:08:11
 
Real,
i did the same thing to my capacitors. I ordered two of them the second time around for a spare.
I was touching up some of the soldering joints when I rested the iron on the cap. I noticed it before I started it up so I had no risk of damage.
I will have to see if I can figure out how to made a sticker like that.
John
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VPI Scoutmaster, Grado Sonata1, Counterpoint pre amp and amp (modded by Altavista Audio), Proac sp. and home made subs. Lots of room treatment. Anti-cable sp cables, Decware IC, ZKit 1.
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Real
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Re: First Amp Done
Reply #22 - 02/26/13 at 00:44:03
 
Hi John,

That is funy I ordered 3 just in case.

I just copy and paste the logo off the web site
and printed it on a lazer printer using clear label stock.
Make sure it is clear some say clear but are cloudy.

Here is the picture of the inside.

Real
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GEDC0002.JPG
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mboxler
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Posts: 85
Re: First Amp Done
Reply #23 - 08/07/13 at 17:01:33
 
An update on my project...warning, if I sound pumped, it's because I am.

Both amps are completed.  I had to re-build the first one, as components continued to fail due to shorting the board during the inital build.  I also replaced the coupling caps wih Jupiter Beeswax HT series caps.

I commissioned Al Klappenberger (alkeng.com) to build me a special version of his extreme slope (120dB) crossover from the mid to tweeter for my Klipschorns.  I completed an active crossover from Marchand Electronics, with a 24dB cross at 300 Hz.  One Zkit1 drives the woofers, the other connects to the new crossover.  Since the bass efficiency is about 104dB, and the mid-tweeter is about 109db, the bass Zkit1 is at full volume, and the one to the passive crossover around 2-3 o'clock.

The imaging is stunning.  It's as if these hugh speakers have disappeared, and the music is coming from the entire wall.  I listened to "Caverna Magica" by Andreas Vollenweider, and thought I was in a cave!

I'm using the pre-outs from my AVR now, but will switch to a Schiit Bifrost DAC and Dodd audio tube preamp soon.  It can only get better!

Mike        
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