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weird RFI?

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Posted on June 13, 2020 at 11:51:48
LtMandella
Audiophile

Posts: 849
Location: CA
Joined: May 27, 2019
Whenever I place my arm near the right front corner of my Transcendent Sound T8-LN when it is powered on I feel a very noticeable "Static" field. Feels like I am putting my arm near a highly statically charged material and about to get a big static shock. However if I do touch that area of the amp there is no shock.

What the heck causes that?

The amp is perfectly quiet, no hum, no audible issues...

The charge field is only near the right front corner. If I move my arm to the left front or towards the back of the amp, I cannot sense any static charge.

weird...

If art interprets our dreams, the computer executes them in the guise of programs!

 

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Corona, maybe?, posted on June 14, 2020 at 11:13:09
Lew
Audiophile

Posts: 10366
Location: Bethesda, Maryland
Joined: December 11, 2000
There may be a static charge on an edg-y construct. Might indicate an iffy solder joint or tracing. Do the hairs on your arm stand up, or seem to do so? If you darken the room, can you see a bluish glow in the area where you sense a charge?

 

RE: Corona, maybe?, posted on June 14, 2020 at 11:27:56
LtMandella
Audiophile

Posts: 849
Location: CA
Joined: May 27, 2019
thanks for the reply!

and yep, hairs on arm when positioned near that corner do stand up, very much so. that is how I noticed the issue.

will look for bluish glow tonight but I don't recall seeing such.

there is no tranny close in that corner, just a big cap. It is a factory assembled version but I did some minor repairs about 3 months go, after almost 20 years of use - replaced all the power tube anode caps, and 4 bad 640v capacitors.

Never noticed this issue until last few weeks.

I have Bruce's book that shows the schematic and parts list (80 watt mono version) but it calls out the differences for my 25 watt stereo version.

Always wish I had bought the 80 watt version but - as my indian friend said when I told her I should have married an indian girl - too late now :)



If art interprets our dreams, the computer executes them in the guise of programs!

 

RE: Corona, maybe?, posted on June 15, 2020 at 11:13:33
Ralph
Manufacturer

Posts: 3910
Location: Minnesota
Joined: April 24, 2002
It might be time to replace the wires to the plate caps, but that really doesn't explain why there would be static outside of the box, unless you are running the amp with the cover removed.

Is the chassis grounded to the wall?

 

RE: Corona, maybe?, posted on June 16, 2020 at 11:47:21
LtMandella
Audiophile

Posts: 849
Location: CA
Joined: May 27, 2019
The unit has a 3 prong plug and the outlet has 3 holes, and it is a relatively new building, and the surge protector shows green "protected" LED, so I think so.

I am in Las Vegas, often the relative humidity is in the mid teens (lower than the Sahara desert), and the apartment is largely carpeted.

So maybe I am a walking static charge?




If art interprets our dreams, the computer executes them in the guise of programs!

 

Yes, I've going with static charge. A humidifier would probably sort it. nt, posted on June 16, 2020 at 12:40:36
Ralph
Manufacturer

Posts: 3910
Location: Minnesota
Joined: April 24, 2002
9

 

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