Capacitor on 14U and 15U Smoking

[clamhost]

Amp is MUCH louder though. That is good news.

 

[Paul Birkeland]

Can you measure the AC voltage with that 60hz tone and the volume cranked between the chassis and the end of the white wire where it solders to the headphone jack?

 

[clamhost]

09.3 AC with my meter on VAC 200.

 

[Paul Birkeland]

If you have ~9V there, can you see if the tip of the headphone plug touches the metal on that connection with headphones plugged in?

Also, can you add a photo of the jack from the side with the terminals and resistors?

 

[clamhost]

Here's the pic:
http://imgur.com/z0j5Pss,NmJCvyO

 

[clamhost]

I also took a pic of my HD800 plugged in the crack.
http://imgur.com/oOjZNJP,736QZA0

 

[clamhost]

Help?

 

[clamhost]

I think the tip is touching the plastic internally.

 

[Paul Birkeland]

That looks pretty cooked, we can send you a replacement, just email replacement parts.


When you solder, take a wrap with the wire, then add just enough solder so that the space between the wire and the terminal has solder between it.  It is not necessary to fill the entire hole with solder, and putting solder up the wire does nothing but melt more plastic and make the construction process much tougher. 

-PB

 

[Grainger49]

You have just traced the audio signal path to, and I think through, the volume pot where it disappears at terminals 6 & 10. 

Note, this is a feat you couldn't perform before.  It is a logical straight forward troubleshooting technique.

Congratulations on your new skill.  It is amazing what folks learn here.

 

[NightFlight]

Good news. Asked my grandfather if I could borrow his nice Craftsmen meter and I passed all the checks. Bad news is when I put my HD800 in I can't put it in all the way or I don't hear anything. I have to put the headphone jack in almost all the way to get stereo sound. I believe my TRS jack is bad on the crack.

Opinions or perhaps I'm wrong?

Thanks,

Tom

Smoke... and your eager to stick those 800's in eh? Very brave... First line of business is to get yourself a cheapie set... and a 1/4" adapter if you need it.

 

[clamhost]

Once I soldered the new headphone jack the amp works. It sounds good.

-Thomas

PS: When I remove my headphone jack from the amp the metal plate comes up and knocks down. Is there a way to secure the plate to the wood base?

 

[Paul Joppa]

You can use glue; I'd go with real silicone caulk as it is highly heat-resistent.

But you know the base is not that heavy. You would likely just pull it up along with the amp.

Easiest is to put down your "adult beverage of choice" (mine is usually gin in some form) and use your other hand to hold the chassis down.

Ultimate is to make a base out of lead or depleted uranium.

Yes I seem to have an April 1st hangover. I blame it on the gin. :^)

 

[STURMJ]

IMO silicone calking is the way to go.  If you need/want to do some mods, you can still push the top plate off the base, rub off the calking and re-glue the top to re secure it. ( and if you're careful you probably won't ever break anything)