weird RFI?

70.173.239.44

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

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...

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Corona, maybe?

Lew

11:13:09 06/14/20

4

RE: Corona, maybe?

LtMandella

11:27:56 06/14/20

3

RE: Corona, maybe?

Ralph

11:13:33 06/15/20

2

...

Show full thread outline!

Corona, maybe?

Lew

11:13:09 06/14/20

4

RE: Corona, maybe?

LtMandella

11:27:56 06/14/20

3

RE: Corona, maybe?

Ralph

11:13:33 06/15/20

2

RE: Corona, maybe?

LtMandella

11:47:21 06/16/20

Yes, I've going with static charge. A humidifier would probably sort it. nt

Ralph

12:40:36 06/16/20

Corona, maybe?, posted on June 14, 2020 at 11:13:09
Lew Audiophile Posts: 10911 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

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 :)

RE: Corona, maybe?, posted on June 15, 2020 at 11:13:33
Ralph Manufacturer Posts: 4769 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	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?

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: 4769 Location: Minnesota Joined: April 24, 2002	9

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weird RFI?

70.173.239.44