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Post subject: Where to get a new pcb??
Posted: Thu Mar 11, 2010 10:22 am
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Hi all! First time poster here...

I was wondering if anyone would possibly know how to get their hands on a PCB for the HRDlx. I've come across a HRDlx for free, but the PCB is apparently rendered useless due to some amateur modding.

I've been looking all over, but can't seem to find one! If I could restore this amp to some fashion of working order, I'd just bring it along to gigs as a backup.

Any help!?



-Kris


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Post subject: Re: Where to get a new pcb??
Posted: Thu Mar 11, 2010 10:56 am
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The only way to get your hands on a new PCB for a HRDX or any other current Fender amp is get a job in the Fender factory and touch one :P

Fender doesn't sell aftermarket PCB boards for their amps. I've never heard of any amp manufacturer doing that actually.

Fender has amp schematics on this website. Here, I saved you the trouble. http://www.fender.com/support/amp_schem ... ematic.pdf

If the board really is completely shot, maybe you could salvage a board out of a HRDX that has a trashed cab?

Or the expensive and time consuming route would be to gut the amp and put in a board from a kit from Weber, or Marsh, or Mojo, etc etc. There are tons of amp board kits out there. Of course, no kit supplier makes a HRDX clone so you'll have to choose a board for a Bassman or something like that depending on what is compatible with the HRDX power and output transformers, and I'm not sure if the PT can work with a tube rectifier. Maybe start here https://taweber.powweb.com/store/kits_50a.htm#5F6A but without the cab, chassis, and speakers and just plug the unused control knob holes in the existing HRDX chassis.

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Posted: Thu Mar 11, 2010 11:06 am
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I don't know for sure if something like this exists for your particular amp, but there are kits for some amps where you are converting from pcb to point-to-point.
If your amp is all tube, it is a possibility.
You would need to do some research to verifiy if this is possible, but if it is, for sure you should take the free amp & see what happen.......


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Posted: Thu Mar 11, 2010 12:32 pm
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If you're good with a soldering iron you can just make jumpers to get around the bad traces.


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Posted: Thu Mar 11, 2010 1:57 pm
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There's a fellow from around Dallas that salvages the HRD cabinet, chassis, and xformers when the board fries, and turns them into great tweed recreations. I understand that the traces are really wimpy on the pcb, and the proximity of some of the resistors to the board is close, and cooks the thing.


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Posted: Thu Mar 11, 2010 2:26 pm
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Yep, he resides on www.thefenderforum.com His name is TJ aka NTbluesguiter

The man is legendary.


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Posted: Thu Mar 11, 2010 3:55 pm
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I've seen just about all of these options before about converting the amp to ptp, but it's just not that big of a deal to me to spend money completely transforming the amp...it's just a spare, after all.

I'll probably end up trying to salvage the pcb by soldering jumpers around the bad sections...the only problem being there are SEVERAL, ha.

Thanks for all the helpful info!

-Kris


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Post subject:
Posted: Thu Mar 11, 2010 4:22 pm
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fonikoddity wrote:
I've seen just about all of these options before about converting the amp to ptp, but it's just not that big of a deal to me to spend money completely transforming the amp...it's just a spare, after all.

I'll probably end up trying to salvage the pcb by soldering jumpers around the bad sections...the only problem being there are SEVERAL, ha.

Thanks for all the helpful info!

-Kris


That whole PCB is a bad section, even on the new ones LOL. Single sided, thin traced boards with tube sockets mounted to them rarely hold up well especially if the tubes are inverted sending the heat directly to the chassis and PCB. :?


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Posted: Thu Mar 11, 2010 5:06 pm
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Hey Kris, there's a product called, Circuit Writer Conductive ink pen. I've been curious about this, but have never tried it. It might be just the tool for the job. It's a silver solution, so conductivity would be good. Don't know what kind of hoops you'd have to jump through to prepare the board. But in your case, I'd sure give it a try. It's available at www,tubesandmore.com. Art

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Posted: Fri Mar 12, 2010 4:25 pm
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Sounds like a great candidate for a point to point project. Can't wait until my Blues Deluxe blows up, (death by natural causes) so I can tell the wife I need to rebuild it, but make it better so it never happens again. :wink:


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