hello,phatt..thx u so much for answering...wow, i have never think about that..thx a lot..actually,i;m just wondering what kind of repairing that can often damage/change the tone of amp and..is my amp repairing included? thx u 

i think HK blue edition series will offer your requirement? visit: Hughes-and-kettner.com
good luck

hi,Teemuk and everyone ...i have some questions:
i've just repaired my amp (the repairman said it was because of a loose solder-so he re-soldered it)..but now, i think my amp tone has changed..i'm just wondering :
1. can that kind of repairing - re-soldering a loose solder - change the tone of my amp? (or is it only because of my poor hearing n feeling about my amp tone?(cause i rarely use that amp  )
2. and i also, would like to know,what kind of repairing stuffs that can altered the tone of my amp?
thx u

wow, Teemuk ..thx u for replying..and thank u for your kindness to explained me so clear n easy to understand for my poor english..your explanation was amazing and useful like always,thx u :tu:...i understand it now....
hope my amp keeping its performance...love this amp very much ...
i love this site too <3)

btw,thx for all of the replies,my friends (Teemuk, Jack1962,JM Fahey)..thx u so much for sharing

hi...JM Fahey, sorry for replying so late..i haven't got the chance to reply because of my awful internet connection i have a few days ago...thx for replying..i understand it now ..thx u so much... btw, my original language is Malay and Indonesia languange..

btw, i'm still needing advice on this question....

Quotei really would like to know :
1. why can my amp had a loose solder joint, even though i rarely overused my amp (i even rarely use my amp)?

2. ..and what should i do to avoid that problem again and to maintain my amp in the top performance in the future?

if Teemuk and others don't mind, please help answer this questions...i really want to upgrade my knowledge about amp maintanance and repairing...thx u

hi..why no one answer my question?  i really would like to know why can my amp had a loose solder joint, even though i rarely overused my amp (i even rarely use my amp )....and what should i do to avoid that problem again and to maintain my amp in the top performance in the future? please reply,Teemuk and others...thx u

hello...thx u for the replies, guys....thx u so much... I have tried advices from all of you on cleaning the pots and the jack input a few days ago and i found it doesn't work and i luckily have a quick chance to took my amp to the official dealer of HK in my country few days ago..and have it fixed...no problems for this two days
the repairman said that it wasn't because of the dirty pot or input , but like the one that Teemuk has said before...there was a loose solder joints and then he fixed it and all come back to normal... <3)

but, now i am questioning something:
i rarely use this amp and i have never play it quiet loud ( never pull the volume or distortion to max position) and i always keep my amp into the box every time i finished practising..so, how can my amp have a loose solder joint? my friend said it might be happened because of rust? is it true? please reply...thx u


btw, for JM Fahey : what did you mean by "touch up" the solder joints? please explain it to me...i have a bad english, sorry. ..thx u

hi..Teemuk and Jack...thx a lot for the more detail explanations, clearer for me now...i'll try all of your advices tonight..if i have a problem, i'll post a question again if u don't mind.
thx u so much...btw, how can i clean the input jack also? thx u

QuoteHeat up the solder joints on the pot.

hi!!  thx u for the reply, jack1962.. i understand now...ok, i will clean first before checking and then heating up the solder joints, like you n Teemuk suggested..thx u so much ...but i have another questions....
1. how can i apply the contact cleaner and clean the jack input? and should i open my amp's case for cleaning the pot?

2. and, i'm just curious, why is the volume decreasing is always synchronized ? ( if my clean channel volume is decreasing, the lead channel is also decreasing at the same time,..visa versa..) is the clean volume and lead volume are connected directly so when either one pot is dirty, the other one will be affected too although this other one is not dirty?
thx u for so concern...


btw, i'm still waiting for Teemuk's answers too... thx u

warm regards, Jeansen 

hello, Teemuk and jack1962.thx u for replying  and so concern..thx a lot..
but if you don't mind, i need to ask you some questions again because of my poor english and poor knowledge about electronics...

1.

QuoteSince you can "cure" the problem by applying some stress to one of the potentiometers (therefore re-establishing the weakened contact), the one in question would be my first suspect.

Teemuk, i'm sorry to bother u, but can you please explain me more detail about that sentence..? cause i don't really understand what u mean there... what do you mean by the word "stress" and what did i've done that you called as "re-establishing the weakened contact"?
and what do you mean by the sentence " the one in question" ?

2.

QuoteI would start by throwin some heat to it right away.

jack1962, what do you mean by " throwing some "heat"? sorry for botering you too..

3. ....and please show me how can i apply the contact cleaner to the pots and (especially) to the input jack? sorry for asking so dumb question , i'm a newbie in amp world..thank you so much..

btw, just wanna say ...i'm really happy to meet u all and proud to be in this community...thx a lot again... <3)

warm  regards,
Jeansen 

hello, i'm new here and really glad to find this forum... i really need help for my amp here..i have a solid state amp Hughes& Kettner blue edition 30 r , i already had it for 3 years now and i really like this amp, an amazing practise amp <3)...but a few days ago, this amp having trouble ..the volume is decreasing suddenly in both channel: clean and lead channel and it always synchronized...(if my clean channel volume is decreasing, the lead channel is also decreasing,..visa versa..) it sounds like that there is a sound that want to goes out but it can't ... this problem came in no precise time and paroxysm...sometimes in the middle of my playing and sometimes it already came just as i start turning on the amp volume...

i have tried to isolate the problem by using my amp's "return" to know if the damage is on the preamp or power amp, but i think the power amp is still ok..(the "master" volume is still in perfect condition and no volume decreasing there)....
i also use another guitar and cable or even using another amp to find if the problem is on my guitar or cable but i found that my guitar and the cable are just fine...i also always keep my amp away from the wall to keep a proper ventilation for my amp..

and then, yesterday, i found that i can have the volume back to normal if i turn the volume knob to the maximum position or strum really hard to the strings of my guitar...so as an example: if i have my volume decreasing in some position(x position), then i can fix it if i turn the volume knob to maximum position and the amp volume is back to normal...(if i turn the knob to x position again, the volume produced by my amp is normal for the x position again) ......but then i found also that it won't stay long, the problem will come again and again...

what's wrong with my amp? i have never use my amp too loud or too harsh..i even rarely use this amp, it spends more time in the box then out in my room ( it because of my busy schedules i have for the last 2 years)

btw, is the problem is on the preamp?  is this a problem that i can handle by myself? cause i'm thinking that it is because of a dirty pot or dirty input..is it possible? i'm thinking this because few a days ago, i didn't put my amp to the box and i also put this amp uncovered in my room and i let my cable stay plugged in the input socket..can it be the cause of this problem? if it is, how can i clean the input socket and the pot? could you give me the steps on how to do it? and is there any cautions or danger for my amp that i need to know for doing this?

another question : a few days ago, i also use this amp for playing my acoustic electric nylon guitar ...could it also be the cause?

sorry, i am asking a lot of question and emotional words, i am a newbie on a world of amp and i really love this amp....this amp is so important for me...
please help....thx u