bayoubill
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Amp Problems RESOLVED!
My Hot Rod Deluxe is making a loud cracking noise in over drive. It's never done that before. The tone is brittle. Not good 
post edited by bayoubill - 2013/07/01 12:26:08
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ampfixer
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Re: Amp Problems
2013/06/29 02:35:34
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Could be many things. Is it only on the overdrive channel?
Hard to diagnose online, but not impossible.
Regards, John I want to make it clear that I am an Eedjit. I have no direct, or indirect, knowledge of business, the music industry, forum threads or the meaning of life. I know about amps. WIN 10 Pro X64, I7-3770k 16 gigs, ASUS Z77 pro, AMD 7950 3 gig, Steinberg UR44, A-Pro 500, Sonar Platinum, KRK Rokit 6
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maximumpower
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Re: Amp Problems
2013/06/29 06:38:20
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Have you tried re-seating the tubes? Do you have electronics cleaner?
I have cured crackling problems before on my amp by pulling each tube, spraying each socket, and re-seating each tube while gently rocking them back and forth as I put them in.
It may have nothing to do with the issue but it is easy to try.
Good luck!
Win 10 (64 bit), i7-2600k 3.4GHz , 8 GB RAM, SATA III (500GB SSD - System, 2TB WD Black - Data), Sonar Platinum x64, m-audio Profire 610
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The Maillard Reaction
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Re: Amp Problems
2013/06/29 08:31:12
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For a crackling noise the first thing I'd do is cycle the cord connections a few times to make sure the contacts are clean at the jacks and plugs.
Then I'd pull and re insert each tube just to make sure those contacts were clean.
If that didn't get rid of the crackling noise... I do a quick swap test with the phase driver/splitter/inverter tube... as a breakdown in that tube (one of the few tube positions where tube actually seems to wear out) can cause a crackling sound.
On the Hot Rod Deluxe this tube will be labeled V3.
If that doesn't help then I'd want to get more specific about what the word "crackling" is describing.
One possible clue is the "overdrive" channel. This might suggest that the problem is in the overdrive circuit... or it may suggest that the problem manifests itself when the overdrive causes extra vibration in the amp chassis and is in the general circuit.
Crackling is usually something simple... but it can be hard to locate.
best regards,
mike
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Guitarhacker
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Re: Amp Problems
2013/06/29 08:56:34
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I spray the pots on my guitar as well as the amp from time to time with some spray contact cleaner. Be careful not to get it on the finish of the guitar or anything else that will be easily damaged. On the guitar, I press the nozzle gently and have the finish protected,..... I dribble a few drops into the pot and work the knobs.
I work the pots back and forth till they move smoothly. Then I turn the amp on and work them as well. Dust and corrosion tend to get into the pots and they become harder to turn and they also get scratchy. If left that way, the static will come in to the sound as well..... not just when I make adjustments. A few minutes to pull the amp apart and spray the pots clears that up..... both the stickiness and the static.
The same thing happens in the tube sockets. Advice above is good. check the tubes in the preamp stages for microphonic tendencies. I've had a few exhibit a buzzing at higher volume and on the distortion channel. I have mostly used combos so the speaker vibration gets right beck to the tubes as the entire cabinet vibrates. Replace as needed.
My website & music: www.herbhartley.com MC4/5/6/X1e.c, on a Custom DAW Focusrite Firewire Saffire Interface BMI/NSAI "Just as the blade chooses the warrior, so too, the song chooses the writer "
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bitflipper
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Re: Amp Problems
2013/06/29 09:54:17
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There are three 12AX7s in that amp. Try swapping them around. Or gently tap each one while powered up and listen for noise. One or more of them may have become microphonic. If so, it's best to replace them all at the same time. And, as noted above, just pulling them out and re-seating them can sometimes remove oxidation from the pins.
 All else is in doubt, so this is the truth I cling to. My Stuff
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bapu
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Re: Amp Problems
2013/06/29 10:52:54
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☄ Helpfulby mike_mccue 2013/06/29 11:09:30
I have a unique suggestion.
Take out each tube and re-seat them.
{BB to Bapu} Thank you Captain Obvious
{Bapu to BB} Just doin' my part
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bayoubill
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Re: Amp Problems
2013/06/29 12:40:30
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☄ Helpfulby bapu 2013/06/29 12:49:32
Thanks so much for the responses. I screwed up by describing the sound as crackling. It's a sound I've never heard before but it's loud enough to be clearly heard. There seems to be some effect on the tone of the amp also. The bass control doesn't seem to have a lot of responsiveness as before and one thing I just thought of is there is crackling when nothing is being played and it's pretty loud. I will try the suggestions and thanks again for the help!!!
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ampfixer
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Re: Amp Problems
2013/06/29 13:25:58
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The second small tube from the far right of the chassis does double duty. It's the tone control make up stage and part of the drive circuit. This tube is the one that you should swap for a known good tube. There are a number of relays and solid state drive devices involved in the OD circuit also. It's important that you determine where the bad sound is. Normal, drive, more drive. If it is tied to one of these operating modes then it makes isolating the problem easier. It's very doubtful that it's a dirty pot or socket because those types of issues come and go. Also, if it was a pot you would hear the noise when turning it.
Regards, John I want to make it clear that I am an Eedjit. I have no direct, or indirect, knowledge of business, the music industry, forum threads or the meaning of life. I know about amps. WIN 10 Pro X64, I7-3770k 16 gigs, ASUS Z77 pro, AMD 7950 3 gig, Steinberg UR44, A-Pro 500, Sonar Platinum, KRK Rokit 6
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bayoubill
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Re: Amp Problems
2013/06/29 13:38:24
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Thanks John. It's in the more drive channel and I have to crank the amp a bit for the sound to come out. I've been using each channel for distortion levels. Clean channel/ drive channel for crunch/ more drive for hard rockin. Songs like I can't get enough of your love in more drive. 1/3 of the repertoire is in more drive so this is quite a problem for me.
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bayoubill
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Re: Amp Problems
2013/06/29 14:27:24
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It's a twerping sound is the best I can describe it. I guess I need to take it to the shop.
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craigb
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Re: Amp Problems
2013/06/29 14:52:35
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bayoubill
It's a twerping sound is the best I can describe it. I guess I need to take it to the shop.
Hey! The FSF has that same problem!
Time for all of you to head over to Beyond My DAW!
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The Maillard Reaction
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Re: Amp Problems
2013/06/29 15:21:55
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Any chance you are starting to rub the speaker coil?
Those new old fashioned speakers are relatively fragile.
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yorolpal
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Re: Amp Problems
2013/06/29 15:30:18
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Don't you mean "twerking" there Bill, ol pal?
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bayoubill
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Re: Amp Problems
2013/06/29 17:01:58
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I'm going to take to the campground and record it. Then I'll post it on soundcloud
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craigb
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Re: Amp Problems
2013/06/29 17:20:30
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bayoubill
I'm going to take to the campground and record it. Then I'll post it on soundcloud
You're going to record the campground?
Time for all of you to head over to Beyond My DAW!
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bayoubill
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Re: Amp Problems
2013/06/29 17:37:13
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craigb
bayoubill
I'm going to take to the campground and record it. Then I'll post it on soundcloud
You're going to record the campground?
There a gator quartets regularly
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bayoubill
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Re: Amp Problems
2013/06/29 23:38:54
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Here's the link to the static sound. My Brother In Law tells me it's a bad static transistor. He also doesn't think it's a problem because it can't be heard while playing. It's still not the noise I was talking about but today I had no effects set up so it's somewhere within the pedals I suppose. It will have to wait till I can set everything back up. Thanks again for the help everyone!!! static noise
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bapu
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Re: Amp Problems
2013/06/30 13:37:04
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craigb
bayoubill
It's a twerping sound is the best I can describe it. I guess I need to take it to the shop.
Hey! The FSF has that same problem!
I though The FSF was daed. No?
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craigb
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Re: Amp Problems
2013/06/30 14:19:45
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Except when monkeys raise it from the grave.
Time for all of you to head over to Beyond My DAW!
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Ham N Egz
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Re: Amp Problems
2013/07/01 08:01:06
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yorolpal
Don't you mean "twerking" there Bill, ol pal?
TWERKING :: 
Green Acres is the place to be I dont twitter, facebook, snapchat, instagram,linkedin,tumble,pinterest,flick, blah blah,lets have an old fashioned conversation!
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bayoubill
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Re: Amp Problems
2013/07/01 12:24:27
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For some reason I can't take my eyes off ah......i have this strange tingling sensation ...where's my trench coat and sunglasses
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Ham N Egz
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Re: Amp Problems
2013/07/01 12:35:35
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you said "resolved" but I dont see the fix posted...
Green Acres is the place to be I dont twitter, facebook, snapchat, instagram,linkedin,tumble,pinterest,flick, blah blah,lets have an old fashioned conversation!
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The Maillard Reaction
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Re: Amp Problems
2013/07/01 12:40:36
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He pulled the ground lift plug out and plugged it into a safe outlet?
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bayoubill
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Re: Amp Problems
2013/07/01 12:51:54
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musicman100
you said "resolved" but I dont see the fix posted...
My brother in law checked out my amp for me. It's in my effects loop. After above GIF and about 1 minute and 27 seconds my twerking problem is resolved
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