Post by pitcheramps on Feb 28, 2018 10:56:55 GMT -7
Coincidentally, I have CDHenson's EZG in my shop. I will share what I did to repair the amp to benefit others. He did indeed have low end motor boating, but also high frequency squealing, or oscillation. This occurred if you turned the pre and post levels up past about 12 oclock. In the video zpilot posted, the narrator mentioned a bad ground may cause this issue and that is exactly what I found. On these amps there is a ground bus wire soldered across the back of the pots. With this design, a good ground depends on the pots being securely fastened to the chassis. To fix it, I removed the knobs, loosened each pot, wiggled them a bit and re-tightened them. Problem solved. One other thing to keep in mind is the fact that the chassis is aluminum, but the pots are steel, so there is the added chance of corrosion caused by mating dissimilar metals. This is the first Z amp I have seen with this issue, so it is rare.
Post by Chilly Gibbons (Todd T.) on Mar 13, 2018 14:26:56 GMT -7
Thanks for sharing, good info!
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...)
Also, I've found that the pot holes are 3/8" and the pot shafts are the smaller shaft Alpha so you need to make sure ground contact is good. I maintain a gigging musician's EZG50 and after 1 year I have to go through the amp and tighten things up plus spray the jacks, tube sockets and pots. The reverb cuts in and out or goes out completely after replacing reverb pan that had broken transducer lead. Spray the RCA reverb jacks.
Wreck, Express, Liverpool, Rocket Red Stang Ray 212 blue/gold Komet 60 Red Plate Blackverb basic ODS HRM 100 ODS 100 Marshall JCM 800 2204 Marshall 18w Spitfire/Lightning Fender Super Reverb 5b6 Bassman 5f6a Bassman Gibson EH150 Fender Blues Deluxe RT 66 Orange OD 50
Jaguarguy (Mike): Hey Gary - Joe Walsh used a G12 65 in his Galaxie and it sounds great!
Mar 25, 2019 23:05:29 GMT -7
GuitarZ: So, I cranked up the privacy protection on my browsers, facebook, etc. I have to say I miss the music ads and such. I really don't need ads for watches and other random stuff. Maybe the internet knowing me isn't such a bad thing.
Mar 26, 2019 14:01:24 GMT -7
hayesgary307: hanks alot (Mike) I have been going through a Vintage 30 in a open back pine cabinet and through a Marshall 1936 C/B 2-12 I'll check and see what kind of speakers are in the 1936. I've had for a long time and I have forgot whats in it . Thanks for you help
Mar 27, 2019 12:06:54 GMT -7
Joey Beverages: hayesgary307 try a Z 210 or Z 410 with Galaxie ... also, yes the G1265 is most tasty and excellent
Mar 28, 2019 6:03:29 GMT -7
The Bad Poodle: This may be a truism... when you work in a corporate structure, the worst decisions always come from the top.
Mar 29, 2019 16:26:10 GMT -7
Lefty: The fish rots from the head down.
Apr 1, 2019 13:26:26 GMT -7
TeeDawg: Bad Poodle..........truer words have never been said. Imagine what it's like working for NASA. This ain't the nasa that went to the moon fo sho.
Apr 26, 2019 5:59:08 GMT -7
brayks: I have been absent for waaay to long. hope all are doing well!
May 1, 2019 10:19:39 GMT -7
GuitarZ: I'm okay with the AARP letters. You're still living and breathing? What the heck am I to think when a funeral home sends me a free consultation offer? Ouch!
Jun 21, 2019 15:41:26 GMT -7
The Bad Poodle: I bought airline tickets online... now every few days i get emails that read "Your trip is almost here but aren't you forgetting something?? You don't have trip insurance!" and i'm thinking..."is there something i should know about your plane maintenance?"
Jun 21, 2019 16:02:32 GMT -7
GuitarZ: Reminds me of buying my Honda. When they tried to sell me the maintenance package, I said "Is your car not reliable?" Long story short my wife teamed up with the sales lady to buy the maint package. Never again!
Jun 21, 2019 16:16:53 GMT -7