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REVIEW AND COMPARISON: Eddie Current Balancing Act and SUPER 7 - Page 27

post #391 of 400
11/1/12 at 12:51pm

If you just need one adapter for the input tube let me know, I've got a spare for my BA that I never use.

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post #392 of 400
11/1/12 at 1:01pm

That's basically what I need

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post #393 of 400
11/1/12 at 1:04pm

Cool, I'll check if I can find mine and send it out to you.

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post #394 of 400
11/1/12 at 3:57pm

Regarding this transformer noise, after corresponding with Craig he basically recommended that I shim the transformer (in more confusing terminology).  The clamps holding the transformers in place are held in place with glue so tightening the worm clamp won't really work.

 

 

Quote:
The clamp that goes around the power transformer to hold the cores tight can come loose in shipping. You need to tighten up the clamp, you can use a small wooded wedge, or small screw driver blade between the clam, and transformer core. You can’t tighten the clamp with it’s screw because it is glued with varnish. To access the transformer remove the side covers, they only go back on in one direction. Then remove the three sets of wires going to the circuit board on the amps right side. Next take out the four top screws and set the top on the left side of the amp. This will fully expose the power transformer. Pound a small screw driver in as a wedge, or find a piece of hard wood. Be sure to plug the three sets of color coded wires back on the proper connectors. You can test your repair before putting the side covers back on by powering the amp up to see if the transformer is quiet.

 

So this is what I did; went to local hardware store and purchased some shims for $1.50, cut off a few inches from the tip of one shim, knocked it in between the worm clamp and metal plate on one side of the main power transformer at the back of the amp.  To get there you have to remove the sides and top of the amp.  By hand you can remove the three upside down lines on the right side of the amp's pcb and then tuck the front panel to the left (or vice-versa). I was quite surprised at how much it dampened the noise, the clamps even appeared very tight from the start from visual inspection.

 

I think Patrick82 would be proud of the audiophile quality wood wedge I used.

 

700

700


Edited by Mr.Sneis - 11/1/12 at 4:02pm
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post #395 of 400
11/1/12 at 4:03pm
Thread Starter 

Damnit Craig!

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post #396 of 400
11/1/12 at 4:14pm

Wow you are good! I am very glad I don't have hum problem with my power supply!

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post #397 of 400
12/23/12 at 6:15am
Quote:
Originally Posted by audiosceptic View Post

 

I bought a BA from Craig in June of 2010 with the PX4/300B setup and a RK50 volume pot. When I first received it the volume control was messed up and I had a bad hum on one channel. I sent it back to Craig and he repaired it stating that a wire had come loose. In June of this year my BA developed a problem with the Line\Can selector switch where the right channel went out whenever you moved the selector switch. Eventually the right channel went out altogether. I sent the BA back to Craig a second time and decided to sell it.

 

While I thought the BA sounded great I was disappointed with the repairs needed and lost confidence in the reliability of the product.

 

Just my experience since you stated you wanted to hear from others.

Usually the units sent for test are built with extra care. The manufacturer might just get sloppy afterwards. It is a bit disappointed to see that there is almost no response to audiosceptic's post. Anyway, Mr. Uthus may want to pay more attention on quality control. 


Edited by econparanoia - 12/23/12 at 6:27am
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post #398 of 400
12/23/12 at 6:56am

Mr. Uthus changed some things since 2010 - to my understanding the wiring is not being done by the same people and issues are few and far between.  Craig always fixes these things for free if theres a problem (not stemming from negligence.)

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post #399 of 400
12/23/12 at 10:09am
Thread Starter 

He doesn't frequent the HF forums either, so you won't see any official statement or announcements here.

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post #400 of 400
12/25/12 at 2:55pm

There a comparison between Super 7 and Zana Deux ?

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Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › REVIEW AND COMPARISON: Eddie Current Balancing Act and SUPER 7