popping sound on amp input (vintage fender content)

[Chickenwings]

yeah so when the amp is ON (not standby) when i plug into the reverb channel there is a really loud pop, then everything works fine. same if i unplug. I know its not ideal to just plug in and unplug while the amp is on, but its no big deal on my other amps, so its annoying.
The non reverb (actually converted to reverb on both channels) channel does not have this problem. Any ideas?
oh yeah btw its a 1969 twin reverb. Godly sounding amp.

 

[Vasshu the humanoid typhoon]

Re: popping sound on amp input (vintage fender content)

Sounds like DC is floating around.
how about some of them TB pedals, do they pop now when engaged?
Especially the dirt ones...

 

[Chickenwings]

Re: popping sound on amp input (vintage fender content)

nah they are all fine.
why do you reckon it happens only on one channel tho?

 

[Vasshu the humanoid typhoon]

Re: popping sound on amp input (vintage fender content)

The reverb thing....more gain.

 

[Securb]

Re: popping sound on amp input (vintage fender content)

When is the last time you got in there to blow the dust out and hit the jacks and pots with electronics cleaner?

 

[Funkfingers]

Re: popping sound on amp input (vintage fender content)

Could be a microphonic pre-amp valve in that one channel. (Hence, the other channel not exhibiting the same problem.)

 

[Vasshu the humanoid typhoon]

Re: popping sound on amp input (vintage fender content)

Stonevalves!!!
You need stonevalves!
With titanium sockets....

 

[Chickenwings]

Re: popping sound on amp input (vintage fender content)

All the great instruments of history were made of stone. Stradivarii, Steinways, Martins, Selmers. I think you are on to something.

 

[Chickenwings]

Re: popping sound on amp input (vintage fender content)

When is the last time you got in there to blow the dust out and hit the jacks and pots with electronics cleaner?

Yesterday.

 

[GoldenVulture]

Re: popping sound on amp input (vintage fender content)

There's a small electrolytic on the cathode of the input valve [4.7Ufd ]. That could be it.

 

[Chickenwings]

Re: popping sound on amp input (vintage fender content)

ill have a look

 

[Chickenwings]

Re: popping sound on amp input (vintage fender content)

Ive noticed it also goes "boom" when ive had it on standby to warm things up, then flip the "on" switch.

 

[Vasshu the humanoid typhoon]

Re: popping sound on amp input (vintage fender content)

 

[Securb]

Re: popping sound on amp input (vintage fender content)

Yesterday.

That sucks sounds like a bigger problem. Like Funk said it could be a tube. I would tap on them with a pencil eraser to see if they respond to that.

 

[GoldenVulture]

Re: popping sound on amp input (vintage fender content)

[QUOTEThe non reverb (actually converted to reverb on both channels) channel does not have this problem. Any ideas?][/QUOTE]
This suggests it's in the preamp of the other channel before it gets to the reverb.