Post by groovergeorge on Jul 7, 2007 20:18:20 GMT -7
Being under the influence of "colitas rising up through air" i accidently inserted my speaker cable out of my 4ohm out the Z28 into an 8ohm speaker. There's lots of crackling,no clear signal. I've tested the speaker with my ghia and its fine. The z28 however isn't well at all? Please help,what have I done?
Post by groovergeorge on Jul 8, 2007 1:26:30 GMT -7
You didn't do anything wrong. You can go 4 into 8 or 16 but you shouldn't go 8 into 4, or 16 into 8 or 4. Did you yank it out without turning off the amp? Sounds like you have a possible tube issue.
Ok, what I think i might have done was yank the speaker cable out of the 4ohm out while still on and re-plugged into the 8ohm in panic. Pretty stupid I know since I used to use the 8ohm tap on my old jmp into a 16ohm greenback quad. I've just swapped out the rectifier but the crackle is still present. What tubes are you referring to, Power= 6v6's or the pre-amp that need to be replaced?
Your help is greatly appreciated as I am very concerned i may have done some damage to the transformer!
I have nothing else for you, George. Nothing except to suggest that maybe the best "panic" response to things electiric is to hit the power off switch. Easier said than done, I know. I have to remind myself too often. That, and try another cable. If there was a marginal solder connection before the panic yank and plug, it may be shorting now.
There's never enough time to do all the nothing you want … Calvin and Hobbes
Post by groovergeorge on Jul 8, 2007 2:05:53 GMT -7
I just got off the phone to my father-in-law to be and he said that i should look at the pre-amp stage first and then move to the power and then to the rectifier. It could just be that i sent a surge of power into the ef86. Ouch,that thing was N.O.S GEC. If anyone else has got any other ideas let me know,I'm just fault finding through elimination. Maybe Ted Weber or the good Doc might know but I don't want to bother them as I'm sure they are real busy.
Post by groovergeorge on Jul 9, 2007 21:57:15 GMT -7
Your not going to believe this one. Rubber band wrapped a few times around the suspect ef86,tube retaining socket to hold the tube in tighter acquired from my Maz and voila! Problem fixed!!! I might just buy a couple of spares,maybe a Dario miniwatt or Bugle boy.
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roscoenyc: I have never in my life experienced tube rattle. That said, I've only been playing electric guitar for 49 years.
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