Having technical difficulties-Solved-Screws are tight again

[mraajr]

Okay. This will be short and sweet. When I turn my from standby (or switch from being on the clean channel for awhile) and I try to use the second or third channel it acts as if there is a gate and the amp will not start playing until a good amount of signal comes through. Once I strike a hard power chord it comes on and plays fine acting similar to a shitty noise gate. It is limited to the 2nd and 3rd channel and does not do it on the clean. Is this a preamp tube issue?

 

[duesentrieb]

Probably. Which amp? See official site for tube layout (tech section).

 

[mraajr]

Herbert.....It just seems like odd symptons for a tube issue.

After looking at the tube layout none of the tubes are for the 2nd and 3rd channel only. The problem only affects the 2nd and 3rd channel.

 

[mraajr]

No suggestions other than look at the site?

 

[mraajr]

 

[glip22]

Personally, I would put in a new set of preamp tubes. If it still did it I would retube the power section and change the fuses for the hell of it. If it still did it I would open the amp up and take a look around for any burns or loose wires, connections, etc. If it still did it I would smash the amp against the wall, go to a bar and get shitfaced drunk, come home and check it again. If it still did it

 

[duesentrieb]

No suggestions other than look at the site?

New V1 and / or V2 should solve your issue.

There's a time gap between the US and europe, well . . .

Personally, I would put in a new set of preamp tubes. If it still did it I would retube the power section and change the fuses for the hell of it. If it still did it I would open the amp up and take a look around for any burns or loose wires, connections, etc. If it still did it I would smash the amp against the wall, go to a bar and get shitfaced drunk, come home and check it again. If it still did it

Yeah, it is pretty obvious that the "problem" seems to be within the preamp section. So the first thing would be to swap some ECCs/12AX7s around, then probably get some fresh ECCs/12AX7s and then we'll see further.
I'd focus on V1 and V2 . . .

the second triode of V1 affects just channel 2 and channel 3.

 

[Peter Diezel]

Listen to Duesie

 

[duesentrieb]

lol

 

[Digital Jams]

So how is it coming?


Hi Peter!

 

[mraajr]

Not good

 

[duesentrieb]

Did you try new ECCs in V1 and V2?

 

[mraajr]

Why the fuck do my posts keep getting deleted? Yes I replaced those to no avail. I am confident it is not a tube issue but a tube socket or a cold solder joint.

 

[duesentrieb]

Post a pic of the sockets. I didn't delete anything here.

 

[mraajr]

Although not my pic you get the idea. I will post some of mine later tonight.

 

[duesentrieb]

Waiting for your amp's pic.

 

[duesentrieb]

btw: amp on standby: no B+ on the power and preamp tubes.
Move the preamp tubes gently a bit forth and back.

And with very very few builders/techs hanging over at HCAF anymore, most "tech" threads are useless there.

 

[mraajr]

btw: amp on standby: no B+ on the power and preamp tubes.
Move the preamp tubes gently a bit forth and back.

And with very very few builders/techs hanging over at HCAF anymore, most "tech" threads are useless there.

Yea thats for sure. Yea I did that and it cuts in and out. I know it has to be a cold solder joint. I can see them.

 

[Peter Diezel]

Since I do the test management we don´t have
cold solder points.

Please check the clambs inside the tube socket.
You can tighten it with a small screw driver.

UNPLUG THE AMP !!!

Also a bit cleaner spray will help a lot.

Best,

Peter

 

[mraajr]

Well I understand what you are saying but there are without a doubt cold solder joints. I will take pictures and post them. I have made enough of them in my life to know what they are On top of that 99% of the joints are perfect. It is obvious these are out of place. I am going to do everything that is suggested, but I am positive there is something loose. As I wiggle some of the pre tubes the amp cuts in and out indicative of a cold solder joint or bad connection somewhere. Possibly a dirty tube slot.