Amp quits after falling over in my trunk...

[Allthumbs56]

So .... I picked up a used Traynor YCV50 on Saturday. Took it home and it worked fine. Had a jam that night a few blocks over and with my tendonitis flaring up I just managed to get it into my trunk - but left it standing up. Anyway, squirrel, brake too hard, bigh bang in trunk.

Got to the jam and plugged in. Amp powers up - but no signal on the clean channel (very quiet) but a great big hum with no guitar signal coming through on the drive channel.

Could only check on the spot that the power tubes were still seated. Switched her off zipped home and grabbed my pair of Princetons (which sounded wonderful) for the night.

I'm going to take closer look at the Traynor tonight but I'm no expert - I can swap tubes and see broken wires/connections.

So I thought I'd ask those who know better - what are the odds that when I peek into the chassis that I'm just gonna find a blown/unseated pre-amp tube? Or could it be that one of the power tubes is shot? What would I look at next?

Any advice?

Thanks

[DIXØN]

Sounds like one or more preamp valves has been smashed. Should still be in the socket, as most pre amp valves are contained within a steel shield can.

[Blue Strat]

Why think about "odds" when you can find out for yourself? Let us know what the status of the tubes is.

[slider313]

I know the feeling.I had that happen to me with my old Ampeg in my trunk some years back.I was lucky there was no damage.I stopped putting amps in the trunk after that.In the future put the amp on the floor behind the passenger seat and wedge it in by moving the seat back.

[Allthumbs56]

Why think about "odds" when you can find out for yourself? Let us know what the status of the tubes is.

Yer absolutely right - I guess I was just looking for a "based on the syptoms it might be ..." or "I had this happen to me before and it turned out to be ....".

Mostly just a little bit of "There, there, everything will be alright" I guess :o

[Blue Strat]

Yer absolutely right - I guess I was just looking for a "based on the syptoms it might be ..." or "I had this happen to me before and it turned out to be ....".

Mostly just a little bit of "There, there, everything will be alright" I guess :o


Tube are always a high probablity in tube amps:)

[slider313]

Is that a single 12"?If it took a good hit,there's a chance your speakers voice coil shifted making it basically useless.Cross it over to another speaker and see what you get.

[BPlexico]

Never stop for squirrels....

[TweeDLX]

Sounds like one or more preamp valves has been smashed. Should still be in the socket, as most pre amp valves are contained within a steel shield can.

The YCV-50 has the pre-amp tubes caged inside the chassis (behind a grill) mounted to a PCB, but not sheilded by the tradition cylindrical tube shield. The power tubes are in the usual under the chassis location and accessable by reaching into the back of the amp.

Mike http://www.thegearpage.net/board/images/icons/icon12.gif

[Allthumbs56]

Strange ..... I got into the chassis and replaced all the preamp tubes, fired it up and it worked. Then I put back the original tubes one at a time to locate the culprit .... and they all worked! Before I pulled them I did check to make sure they were all seated and I was pretty sure that they were - but I guess one of them wasn't?????

One other thing I did notice (that I hadn't when I bought it earlier - and maybe because I had it up on my bench) is that there is quite a loud hum/buzz coming from the power transformer side of things (I felt no corresponding vibration on the transformer itself though). It starts the moment it's switched on (still on Standby) and is not emanating through the speaker. Kinda sounds like a flourescent light fixture. Could it be that the transformer is on it's way out?

[OlAndrew]

Glad its working for ya...they always told me in motorcycle class, "if its small enough to eat at one sitting.....ride right over/through it." I try to make an exception for cats and skunks, though.

Check the power xfrmr for the buzz, might be loose laminations, if its an oldie, might have been designed for a lower line voltage. I'd star thinking about a replacement.