|
Post by donpetertunes on Mar 16, 2020 18:04:32 GMT -7
I am having a problem running my Z Plus stereo with another amp into my stereo HOF reverb pedal-I have done the troubleshooting with other amps, cables, etc.-it is for sure my Z Plus-huge buzz-help ?
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Mar 16, 2020 18:14:46 GMT -7
You can get a A/B A+B Box with a ground lift or you can do it the old school way and just put one of those 3 prong to 2 prong adaptors on the power cord of one of the 2 amps.
|
|
|
Post by Jaguarguy (Mike) on Mar 16, 2020 18:17:24 GMT -7
Eric knows whereof he speaks!
|
|
|
Post by headshrinker (Marc) on Mar 16, 2020 19:37:59 GMT -7
Eric's got it. I've found sometimes it will work better on one amp rather than the other. Try the lift on both and see which works best. My general finding is that if one of the amps is cathode biased and the other is fixed, it works better to have the lift on the cathode biased one. Two cathode biased amps, it's try it on each to see which works best.
|
|
|
Post by Jaguarguy (Mike) on Mar 17, 2020 7:59:00 GMT -7
Let us know when you solve the problem.
|
|
|
Post by donpetertunes on Mar 17, 2020 10:32:40 GMT -7
It does the same thing when I DaisyChain ala Beck from the low input jack in the Z Plus to an old Vibrolux-huge buzz-I will check the ground lift that you folks suggested, but switching the ground on the back of the Vibrolux had no effect-same buzz.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Mar 17, 2020 12:03:47 GMT -7
It does the same thing when I DaisyChain ala Beck from the low input jack in the Z Plus to an old Vibrolux-huge buzz-I will check the ground lift that you folks suggested, but switching the ground on the back of the Vibrolux had no effect-same buzz. Switching the ground on the amp is not the same.
|
|
|
Post by LT on Mar 18, 2020 14:30:47 GMT -7
I've read everything from lifting the ground on all but one amp to modifying your cables by cutting the ground on one end. Too much for my feeble mind to comprehend.....plus I'm way past the age of carrying two (or more) amps to a gig (I do keep an EHX 44 Magnum as a spare though!)
Good luck in finding the solution though. I'm interested in what finally works.
|
|
|
Post by zpilot on Mar 18, 2020 21:03:55 GMT -7
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Mar 19, 2020 7:14:51 GMT -7
Just so you know exactly what I was talking about here's a picture of a ground lift. Again I have to stress that I'm new to this and I've only been playing professionally for a little over 40 years. I used 2 amps at once for a lot of that time but yeah, my experience is rather limited. You aren't gonna die lifting one ground with one of these. Your polarity will be maintained by the spades of the plug.
|
|
|
Post by DeanG on Mar 22, 2020 19:50:20 GMT -7
The last pedal (HOF) device has common ground for Right & Left outputs. Reason for ground loop between Amps. This solved my stereo hum, run one of your signals through the Behringer. Ground isolation using transformer signal coupling. Behringer MicroHD HD400 is a cheap passive transformer signal coupling device. Good to have one of these in your gig bag in case you experience hum noise when your pedal board is plugged into your Amp's input (especially a stereo amp set up, isolating one amp's input is critical to hum elimination). The venue may have your pedal board and amp on different circuits where one may have a faulty earth ground. www.amazon.com/gp/product/B000KUD2G4/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1Or, if you want a wet and dry setup. Place Humdinger after your dirt pedals, split signal to dry Amp and other signal to wet pedals/Amp. Humdinger can do both signal isolation and splitting. www.thegigrig.com/humdinger
|
|
|
Post by donpetertunes on Jul 29, 2020 9:42:55 GMT -7
I finally got a radial AB/Y Big Shot to hopefully solve the ground noise problem I have when running my Z Plus with another amp-sadly it does not fix the problem-can Dr. Z help me ? The Z Plus is a great amp, but I like to run two amps when doing bigger shows ! Obviously there are not a lot of shows these days, but I need to solve this problem-bought the amp brand new-tech says the amp is running perfectly except this very frustrating problem-Help !
|
|
|
Post by purpletele on Jul 29, 2020 11:39:00 GMT -7
I finally got a radial AB/Y Big Shot to hopefully solve the ground noise problem I have when running my Z Plus with another amp-sadly it does not fix the problem-can Dr. Z help me ? The Z Plus is a great amp, but I like to run two amps when doing bigger shows ! Obviously there are not a lot of shows these days, but I need to solve this problem-bought the amp brand new-tech says the amp is running perfectly except this very frustrating problem-Help ! donpetertunes, I'll set up my Z-Plus with another amp later this afternoon. I pulled out my Radial Twin-City ABY amp switcher to remind me. What is the other am that you are using? I'll use my AB763 Combo. I am curious, I have ran multiple combinations of amps through this box. The ground lift switch has come into use as well and it has been effective. I'll let you know what I find out. UPDATE: I went ahead and hooked everything up very quickly. I found that when I hook up my Z-Plus into the ABY as described and then hook up my 50 Watt Plexi everything works very well. I hooked up the B side to a little Friedman that I have and that connection didn't create any issues.
Fun experiment it sounded killer.
I can't image the Z-Plus or any other Z amp creating any grounding issues, they are all UL rated system's.
Have you tried hooking things up in another room? In another house.
Did you say if your house is grounded with a Rod or tied to rebar in a footing?
I can take a photo if you need, but I don't have any issues with the my Z-Plus running in stereo
|
|
|
Post by frankie on Jul 29, 2020 12:22:38 GMT -7
I've addressed this gentleman's issues twice now, once earlier this year, with the same advice both times, and now it is up to him if he would like to follow our advice. 1. Use a ground lift/hum eliminator like an Ebtech HumX which uses diodes to maintain a small voltage reference to ground. Or, 2. Have a tech reverse the AC inlet wiring to match the polarity of the other stereo amp. Or, 3. Use a different amp. As purpletele noted, this isn't an issue with the Z-Plus itself, just the polarity relationship with the other amp in question. It's false to assume a problem with the Z-Plus. There's not an inherent problem in either amp, it's simply an obstacle to address in this particular arrangement that the gentleman is attempting.
|
|
bigez
New Member
Posts: 46
|
Post by bigez on Jul 29, 2020 12:43:29 GMT -7
I had the same issue and the EBtech Hum X fixed it.
|
|
|
Post by frankie on Jul 29, 2020 12:53:45 GMT -7
I had the same issue and the EBtech Hum X fixed it. If you are crafty there are tutorials on the web on how to make one of these diode lift ground reference units with some time and a trip to the hardware store. I have made one myself.
|
|
|
Post by trojanhov on Jul 30, 2020 8:57:27 GMT -7
It literally sounds like a ground issue and not the amp. When ur running stereo, ground loops are a problem and noise should be expected.
Wet dry with a gigrig humdinger or an ab/y with the ground/phase switch should fix ur problem? Seems too easy a fix?
|
|
|
Post by T-R☼CK ♫ on Aug 2, 2020 6:46:38 GMT -7
Or... you could use one of these. I've kept at least a 1/2 dozen in my gig bag since the late 60s.
|
|