I've got a 2003 2X10 combo. Amazing amp for sure. Recently, It's started having issues at really low volume (like bedroom volume). If I hit the strings pretty hard, the amp distorts and sputters badly. At higher volumes it doesn't do it, maybe rarely. Any reason there would be issues mainly at really low volume? Just replaced power tubes today with brand new ones, no change. Preamp tubes have been swapped around with others I know are good. the socket on v1 is a little "loose" feeling, but I can move that tube around with the amp on and it doesn't make any noise. I'm wondering if it's the volume pot or a cap on the volume pot maybe? I've poked around with a chopstick and don't see any bad solder joints, etc.
I'll try to add a video tonight.
I did send an email to repairs and they suggested ruling out tubes. I did that but wanted to ask here before I email them back. Maybe somebody knows a quick fix
Post by wubberdubber on Mar 8, 2018 18:05:43 GMT -7
Almost sounds like something's "loose"...a solder joint...a socket...a potentiometer...some things can loosen up over time. I'd start by taking off the knobs, make sure all the pots are snug, check the switches and jacks, etc.
MAZ 18 NR 1X12,Remedy head w/Sonic 4X10 or Avatar 2X10...plus the everchanging pile o' guitars.
Post by Chilly Gibbons (Todd T.) on Mar 9, 2018 13:04:22 GMT -7
And tighten the screws on the tube sockets, trannies, jacks, etc. Tighten everything!
Z-Lux Combo in Black, Z-Lux Head/1x12 Z Cab in Red, Cure, Maz 8 Head/1x12 Z Cab In Black, another Maz 8 head/1x12 cab in blond, blond Z-Verb, Red Z-Verb, Maz 18 NR MKII in Black, Therapy blonde, Red Monza, Air Brake, and few more now, but who is counting? Past: Monza 1x10 in Red, Mini Head in Red, Maz 18 Head in Black (Baby come back...)
^^^^ Yes, it sounds like a volume pot problem. Cycle it several times. It might take 30 to 40. It's not uncommon when an amp (any amp) gets a few years on it. If that doesn't do it it might need cleaning with Deoxit, or even replacing.
Question - did the front (or control section) of the amp ever take a bump that you know of? I've seen with issue with a pro's JCM900 (he has a pair he gigs with..150 shows+ a year). Anyways, because he bought padded cases (at my insistence) I now see less of this...but, I'd see one or the other on my bench. Pots would either sheer or deform.
How they can deform is this...a brief, but moderate tap on the front and the pot's posts get a push. This can force the post to slam in and start deforming the back of the pot and, at times, push the back casing so that it's back cover's attachment prongs loosen. After a bit of abuse, the casing loosens enough that now the wiper and disk in the pot have trouble keeping contact midway. If this is happening, you can reform the tabs...just take a flat blade screwdriver and press them back in.
If this is the case, you usually see it happen more significantly at 11-1 range on the pot...and diminish when either near off or fully on. Turn it volume control down to 2 or so and note if the condition improves...then nearly all the way up with no input, but controls maxed and listen for random noise issues. If it's more prominent in the center of a control's range, it's likely that pot.
That said, at this age it could be oxidation anywhere...speaker jacks, input jacks...can't exclude caps, etc.
roscoenyc: You know in school when they talked about "your permanent record"? Well, this is it! Learn to spell! Don't be stupid!
May 21, 2020 8:19:01 GMT -7
premiumplus (Dave): Due or do? Which or witch? Knob or nob? Their or there? Bass or base? Too much time on my hands...
May 24, 2020 6:31:30 GMT -7
roscoenyc: Ah, the incessant tire kickers. oh jeez.
May 25, 2020 6:57:46 GMT -7
GuitarZ: Needed some noise to fill a break in a tune I'm recording. It was too quiet. Just happened to have some High Quality Dr Z Ghia noise to fill the void. "Heal Your Sound with Dr Z! It's not just a guitar tone prescription!"
Jun 13, 2020 8:29:27 GMT -7
GuitarZ: Must be great to be a skunk. Eating bird food about 10' from our sun room. I'm clapping and yelling. At best, it might have given me one "yea what?" look while continuing to dine. At one point, there were two skunks and two racoons.
Jun 14, 2020 18:49:33 GMT -7
captainron (Ron): Hueter Toledo, just another business of today that doesn't care about tomorrow!
Jun 25, 2020 12:51:43 GMT -7
KeithA: Hueter Toledo....that business is gone to the dogs
Jun 26, 2020 8:22:26 GMT -7
easyed: Guitar Z, I encountered to ultimate garbage raiding combo once. We'd been having problems with the garbage cans being raided by raccoons for weeks. Late in the evening I heard rattling at the cans. I went out and found that he'd allied with a skunk. "OK"
Jun 30, 2020 11:40:27 GMT -7
GuitarZ: EasyEd - Someone at work topped us both. The inside of their car had been somewhat ransacked. They were blaming their son. They checked the video. It was a Bear! I'll stick with the racoons, skunks, foxes, and squirrels.
Jul 1, 2020 16:47:50 GMT -7
bigboki: In this age and time when everybody are struggling and especially S&Ms I am amazed to see that kind of ignorance. I am really sorry for your experience dear Dr Z but it is for the better. You don't want to do business with those kind of people anyway.
Jul 4, 2020 8:17:40 GMT -7
GuitarZ: Didn't want to restart the plumbing thread, so I figured I'd ShoutBox this. How the heck does cleaning the aerator on a faucet cause a leak to start under the faucet? Huh? Arggggh!!!!
Jul 10, 2020 7:40:17 GMT -7
The Bad Poodle Experience: well, Mike, it shouldn't have been the cause of a leak. double-check your work.
Jul 10, 2020 12:56:49 GMT -7
GuitarZ: I updated in the Plumbing thread that the Moen website says that a faulty aerator can cause a handle/base leak. Eiyy! I really don't understand how plumbing works. I was ready to double check all connections. But, the leaking stopped with cleaned Aerator.
Jul 11, 2020 18:13:56 GMT -7
jhen86 (jordan): Just got an email from Sweetwater rep that Z Wreck Jr's are back in stock. Just wanted to give everyone a heads up.
Jul 28, 2020 10:57:28 GMT -7
Lefty: Say a prayer for me fellas, I'm going to replace a bathroom faucet this weekend.
Jul 30, 2020 8:26:34 GMT -7