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Title: Loss of Volume Post by: Corinthian on January 21, 2011, 04:27:23 AM I plugged in my HRM100 recently after a period of non use to discover it is extremely quiet; turning the volume to full raises it to about TV volume levels. Strangely the tone has not suffered much - there is still a fair amount of gain on the OD channel.
It is not in a cab and has been moved around so it is entirely possible that something has been knocked loose or damaged inside, but everything looks fine so I suspect it may be a faulty part or connection. Because there is still gain when the OD is on I am assuming it must be after the gain stage, beyond that though I am at a loss. The valves all look healthy as well. Does anyone have any thoughts as to what might cause such a problem and what to test? Obviously, I have put the question to Nik but I though I'd raise it here to see if anyone else had any ideas. Maybe the answers will be helpful to others. Title: Re: Loss of Volume Post by: boldaslove6789 on January 21, 2011, 06:23:54 AM Do you have any replacement tubes to throw in it and test the tubes? If so find a guaranteed good tube and replace your preamp tubes 1 by one. If nothing changes take the outer 2 power tubes out, if nothing changes take the 2 center power tubes out and put the outer ones back in.
Title: Re: Loss of Volume Post by: Corinthian on January 21, 2011, 08:00:23 AM Thanks Boldaslove.
Nik's response was also that it might be the tubes. I don't have any spare, but it's not a problem to get some - and a much easier fix than the other possibilities. Cheers, Title: Re: Loss of Volume Post by: Corinthian on January 23, 2011, 05:50:16 AM So I have replaced the pre and power tubes and checked the bias and it's still the same. The tone is all there but not the volume. |