lushuk Posted May 30, 2011 Posted May 30, 2011 Hi guys, brought this VBA to replace my SVT (in the for sale section:) and after about 20-30 mins it started to crakle, any ideas before I have to return it? It makes the noise with or without the bass connected! [url="http://www.youtube.com/watch?v=fFyypq_bwFk"]http://www.youtube.com/watch?v=fFyypq_bwFk[/url] Thanks for any help Eddy Quote
Mr. Foxen Posted May 30, 2011 Posted May 30, 2011 Dirty connection, cleaning all the valve basses might help. Pull them all out and stick back in after wiping off visible crud. Cleaning other contacts too, cotton bud and meths. Quote
Geddys nose Posted May 30, 2011 Posted May 30, 2011 Was it the VBA off Gumtree? Good price if it was, the valves might have moved in transit,I'd pull them out one by one and reseat them and see if that clears them. Quote
lushuk Posted May 30, 2011 Author Posted May 30, 2011 Cheers for the replies guys, yes it was the gumtree vba, thought the price was good (if it was working ok of course) I picked it up on a halfway meet so transit should not be a problem, ive cleaned the pre and power valves but it made no difference, the seller is fine and will give me a refund or do I take it to a tech and take the hit if its nothing major or get me cash back....................... mmm I have until Thursday! Quote
Mr. Foxen Posted May 30, 2011 Posted May 30, 2011 You have cleaned the pins on the bottom of the valves and the contacts in the sockets, right? There are plenty of other places that could be causing fun. If you run it open in the dark, you might see one valve flashing, which would be your explanation, something shook loose inside it, seen it happen on an amp before, looked like fireballs shooting up inside it. Quote
lushuk Posted May 30, 2011 Author Posted May 30, 2011 Hi Mr F, dint do the socket but I will and wait till it gets dark! it take 20 mins to start crackling from a cold start! Trouble is I want to keep it as long as there is not a hefty repair bill! its all good fun Thanks for your help Eddy [quote name='Mr. Foxen' post='1250583' date='May 30 2011, 06:16 PM']You have cleaned the pins on the bottom of the valves and the contacts in the sockets, right? There are plenty of other places that could be causing fun. If you run it open in the dark, you might see one valve flashing, which would be your explanation, something shook loose inside it, seen it happen on an amp before, looked like fireballs shooting up inside it.[/quote] Quote
Mr. Foxen Posted May 30, 2011 Posted May 30, 2011 Other thing to look for is some of the gubbins inside where the sparking has marked it. That will need a pro repair. Quote
lushuk Posted May 30, 2011 Author Posted May 30, 2011 Well its dark all the valves look stable! never mind thanks though for the ideas! Quote
umph Posted May 31, 2011 Posted May 31, 2011 sounds like arking on the valve basses. clean the bases properly and report back ;p Quote
lushuk Posted June 2, 2011 Author Posted June 2, 2011 Guys thank you, just to let you know it was the valve seats, 2 cleans and all is good, many thanks for the interest in my post! now to find some matching cabs, does it ever stop Quote
MythSte Posted June 2, 2011 Posted June 2, 2011 [quote name='lushuk' post='1253427' date='Jun 2 2011, 03:08 AM']Guys thank you, just to let you know it was the valve seats, 2 cleans and all is good, many thanks for the interest in my post! now to find some matching cabs, does it ever stop [/quote] Great news! Basschat really does have it's uses eh? Quote
NJW Posted June 3, 2011 Posted June 3, 2011 This thread made me feel good. I can sleep well now in the knowledge that somebody has a crackle free amp. Quote
lushuk Posted June 4, 2011 Author Posted June 4, 2011 Pleased to hear it.............. not the crackle of course Quote
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