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Laurie
Double Platinum Member
Canada
4854 Posts |
 Posted - 07/03/2009 : 07:27:20
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Anyone have an RV-3 that makes a noise when switching? A subtle but noticable "k-lunk"? Not enough to really piss you off, but it's definitely there. It ONLY happens when there is signal going through the pedal - play a big chord and hit stomp it and it's there. With no signal, there is no noise.
I just repaired my RV-3. The previuos owner did some dodgy repairs and I had to replace one of the switching JFETs. I couldn't get an SMD JFET (2SK880) so used a 2SK30A (same as the switching FET in most non-SMD pedals).
Wondering if the subtle k-lunk is an artifact of the 2SK30A, or if all RV-3's do it?? |
Edited by - Laurie on 07/03/2009 07:32:27 |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 07/03/2009 : 14:37:17
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Hi Laurie
Is it possible that this is due, to the FET's now being a mis-matched pair,
between the, SMD JFET (2SK880) the 2SK30A?
Have you checked the RdsOn for both?
Just thinking out loud.
Regards Dr. Bob  |
Edited by - Dr. Bob on 07/03/2009 15:03:43 |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 07/03/2009 : 14:42:38
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quote:
Originally posted by Dr. Bob
Hi Laurie
Is it possible that this is due, to the FET's now being a mis-matched pair,
between the, SMD JFET (2SK880) the 2SK30A?
Have you checked the RdsOn for both?
Just thinking out loud.
Regards Dr. Bob
Yeah, that's quite possible. Didn't want to go pulling the second SMD device off the board if other people were experiencing the same thing though  |
Edited by - Dr. Bob on 07/03/2009 16:34:58 |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 07/03/2009 : 16:26:55
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The more i think about it, the more i think you are right. The c30 probably turns off slower than the c880 turns on and that gives the little "volume bump" - both on momentarily.
I'll swap the other c880 tonight and see what i get |
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Ward
Copper Member
Australia
28 Posts |
Posted - 07/04/2009 : 01:52:14
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I used to have an RV-3, with signal going through it and hitting it on you would get a very short "no sound"
Not sure if this is typical but I seem to recall reading someone else had the same thing? There was no k thunk though. |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 07/04/2009 : 03:51:50
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Well, I've just spent about an hour wrestling with this beastie and I'm no closer to an answer.
Theoretically... it should have been the rise time of the gate switching for the FETs. It must be something else because no amount of mucking around produced a noticable result.
Time to admit that "this is how RV-3's are"... Into storage with it and out with the RV-5  |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 10/07/2009 : 12:10:57
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Just reviving this topic...
The switching noise is still there. Small but noticable. Do people generally get a small level drop when hitting the switch to turn on an RV-3, or a small volume boost?
Anyway. I've been looking for one used to replace the repaired one in my collection. The price on these things is always high, so I thought I'd give it another chance.
I like it. A lot. Going to have to start an RV-3 appreciation thread...  |
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zerksies
Double Platinum Member
USA
3406 Posts |
Posted - 10/07/2009 : 17:56:17
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| I would say replace the switch, it might be a bad one, you get them once and a while, not very often tho |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 10/07/2009 : 18:27:35
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quote:
Originally posted by zerksies
I would say replace the switch, it might be a bad one, you get them once and a while, not very often tho
Thanks zerk, but it's not the switch. It's the swithcing electronics |
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hateandwar
Gold Member
Australia
524 Posts |
Posted - 10/12/2009 : 02:13:43
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Hey laurie, ill join you in a rv 3 appreciation thread! I absolutley love mine, it hasn't left my board since the day I bought it.
Although I do agree with you that there is a small noise. But its not enough to annoy me so I don't mind :) I wouldn't mind buying another rv3 actually!! |
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RV-3 switching noise?
