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Post by guitarman1 on May 25, 2006 7:17:27 GMT -7
Yesterday when I turned on my ray, I started hearing some sputtering and grumbling through the speakers. It went away after about 20 seconds, but my output was reduced 80% from normal volume. When shutting the amp off the noise returns for about 15 seconds. I swapped every tube except for the Dario EF86 (I don't have another), but the problem persisted. This morning, all I get is some hum, and no signal from the guitar is heard. What I did notice was if I send the signal out of the fx loop, into an effect, and back in to the amp, I can hear the guitar through the speakers. Remove the cables from the loop and no guitar is heard.
I'm hoping it's the EF86 and I have a NOS Mullard coming from KCA, but I'm stressing until it arrives. Anybody else have any ideas?
Steve
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Post by Lefty on May 25, 2006 7:23:05 GMT -7
My guess is the EF86.
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Post by str8arrow on May 25, 2006 7:39:17 GMT -7
Sounds like it is the tube or in the preamp section... I had similar issues with he rxes ef86 tube.. but never lost output. I'd get expert advice from Doc, Myles or others before I stuck another big $$$ tube in.... let us know! And let us know how you like the Mullard compared to the Dario!
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Post by myles on May 29, 2006 10:37:09 GMT -7
This can be any of the tubes. The EF86 is most likely but if you have a spare 12AX7 in an amp or lying around put it in V2 as I have seen phase inverters cause the same sort of problem. I recently had this problem on a MAZ Jr where it was the phase inverter and a few weeks ago the same problem on a Fender twin reverb.
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Post by Bill on May 31, 2006 6:47:21 GMT -7
Steve, have any luck getting your 'ray back up and running? I had the volume drop happen again two days ago. I put a new NOS Mullard EF86 in that I had bought back a few months ago when they were going for $50.00. After 5 minutes the volume dropped to about 10%. Upon putting the Dario back in, everything's good.
The first time it was V2 that fixed the problem. No probs with the power tubes so far.
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Post by guitarman1 on Jun 1, 2006 11:00:25 GMT -7
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Post by guitarman1 on Jun 1, 2006 12:16:53 GMT -7
Steve, have any luck getting your 'ray back up and running? I had the volume drop happen again two days ago. I put a new NOS Mullard EF86 in that I had bought back a few months ago when they were going for $50.00. After 5 minutes the volume dropped to about 10%. Upon putting the Dario back in, everything's good. The first time it was V2 that fixed the problem. No probs with the power tubes so far. Bill, put a patch cord from your send to return jack and operate the amp as normal. If this resolves the drop out problem, you could be having the same trouble I was having. If this is the case, just check for a small lead of bare wire soldered to one of the three lugs on the return jack. If it is touching anything else other than that one lug, just bend it back away from the other contact point(s). This should make perfect sense once you open it up and see the wiring for that jack. A small piece of electrical tape around the bare lead might keep it from happening again. Hope this helps!
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Post by Bill on Jun 1, 2006 12:39:12 GMT -7
Steve, have any luck getting your 'ray back up and running? I had the volume drop happen again two days ago. I put a new NOS Mullard EF86 in that I had bought back a few months ago when they were going for $50.00. After 5 minutes the volume dropped to about 10%. Upon putting the Dario back in, everything's good. The first time it was V2 that fixed the problem. No probs with the power tubes so far. Bill, put a patch cord from your send to return jack and operate the amp as normal. If this resolves the drop out problem, you could be having the same trouble I was having. If this is the case, just check for a small lead of bare wire soldered to one of the three lugs on the return jack. If it is touching anything else other than that one lug, just bend it back away from the other contact point(s). This should make perfect sense once you open it up and see the wiring for that jack. A small piece of electrical tape around the bare lead might keep it from happening again. Hope this helps! Excellent, thanks Steve! I think it odd and unusual that I'm suddenly having so many tube issues in a new amp. I'll be prepared to try the patch cord technique if it happens again.
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