SCAMMER WARNING: Due to a spate of recent scam attempts (some successful) recently, if you're doing a deal in the classifieds, ONLY USE PAYPAL GOODS AND SERVICES UNLESS YOU KNOW THAT INDIVIDUAL PERSONALLY. It's really not worth saving a few quid.
FS - Fender HRD - Needs repair - £150
What's Hot
Just putting this out there to gauge interest.
Has the common fault where it randomly switches channels.
Had a quick look inside - the usual heat related damage in the usual areas.
1x12 fender speaker.
I think it's an earlier model - Mk1 maybe 2..? (will check later)
Made in Mexico
It sounds fantastic, and generally works well - I use a patch cable partially inserted into the foot switch jack socket and that mostly removes the switching problem.
I'm confident this amp can be repaired at a reasonable cost - I just can't really be bothered with sorting that out and would rather just cut my losses.
Based in Portsmouth/Leicester.
Probably not going to put this in the post.
https://i.imgur.com/L1YxoYi.jpghttps://i.imgur.com/Xcee5e5.jpghttps://i.imgur.com/cU9ggxM.jpghttps://i.imgur.com/ygjhUcF.jpg
Comments
I wasn’t aware this was a common problem.. so perhaps a bit more detail on likely fix and prognosis... if you can get someone like ICBM to comment (maybe in the “Amps” section rather than for sale?.. that may assure people a bit??
I would take it myself just to flip it but I’m simply too busy at the minute repair wise to take on anything else.
If it’s still about in a couple of weeks though I will definitely have it
The problem is probably not the two large 'box' ceramic resistors, but the smaller cylindrical one almost directly below the footswitch socket. You will have to get at the back side of the PCB to fix it, but not too difficult if you know what you're doing.
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
Is it likely that the resistor will need replacing, or just resoldering?
Watch this space - if interested Pm me
Sorry, this is nonsense.
The resistors do overheat, but only just enough to cook the solder joints over a *very* long period, and slowly turn the board brown. There is no fire risk whatever.
(Unlike the Blues Junior, which does have a genuine risk of more serious burning due to a completely different cause - high-voltage arcing on the valve PCB - but is still highly unlikely to actually be a fire risk outside the amp.)
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
He sent me an image and said it will almost certainly look something like this
https://i.imgur.com/fzydATB.png
The diodes CR13 and CR14 also run very hot, and if they desolder themselves that *can* blow other parts.
Yes. Those resistors are the most affected by the supply voltage since the output end of them - to the diodes - is a fixed voltage, which means that when the input voltage is raised, the voltage drop across them and hence the heating is increased.
For amusement, this is what the result of a Blues Junior arc can look like! I've never seen one actually set fire to the amp though.
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
Good luck whatever you do