Princeton Reverb Gerber Files
Moderators: pompeiisneaks, Colossal
Princeton Reverb Gerber Files
I recently made a Princeton Reverb with couple minor tweaks. Here are the gerber files for the pcb if anyone wants to use them. http://ghr.fi/guitaramps/trinceton/prin ... 50x110.zip
Schematic and layout attached
Here is a sound sample we recorded:
Schematic and layout attached
Here is a sound sample we recorded:
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Re: Princeton Reverb Gerber Files
Beautiful work and great sounding amp!
How do the preamp tubes plug into your board? Is there a special socket .
Congrats!
Cheers
Guy
How do the preamp tubes plug into your board? Is there a special socket .
Congrats!
Cheers
Guy
Re: Princeton Reverb Gerber Files
Noval PCB socket
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Re: Princeton Reverb Gerber Files
Thank you Heikki!
Cheers
G
Cheers
G
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Re: Princeton Reverb Gerber Files
quick question
What is R39 for and what do you have in there?
I cant tell from the pics
Steve
What is R39 for and what do you have in there?
I cant tell from the pics
Steve
- pompeiisneaks
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Re: Princeton Reverb Gerber Files
I can't see the value written anywhere, so yeah what 'is' R39, it's a dropper resistor that takes the place of the choke on some builds, basically taking the input voltage post rectification down a notch before the first filter cap.
~Phil
~Phil
tUber Nerd!
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Re: Princeton Reverb Gerber Files
Great project I finished my build over the weekend amp works great and is dead quiet
I used r39 for my standby switch I also did not have those fuse holders so jumped over them
really cool project I used a really big chassis 17x10x2 but I had lots of room to mount the board and
not have to cross mount any transformers thanks again for the gerbers
I used r39 for my standby switch I also did not have those fuse holders so jumped over them
really cool project I used a really big chassis 17x10x2 but I had lots of room to mount the board and
not have to cross mount any transformers thanks again for the gerbers
Re: Princeton Reverb Gerber Files
R39 is optional "sag" resistor. You can put put 50 - 100 ohm 10W resistor there or if you don't want to use it just put a jumper over it or put stand by switch there like you did. I used NTC thermistor there as R39 to limit inrush current so I don't blow my B+ fuses at start up.
Re: Princeton Reverb Gerber Files
Thanks for posting this, Heikki.
Do you recall what your B+ was coming out of your rectifier diodes/at R39?
Do you recall what your B+ was coming out of your rectifier diodes/at R39?
Just plug it in, man.
Re: Princeton Reverb Gerber Files
As I recall in my amp B+ is about 390V. For anyone building this what your B+ voltage is going to be is going to depend on the power transformer you use, but B+ anywhere between 350V - 420V should be fine. If it's in that range there shouldn't be huge impact on tone.
Re: Princeton Reverb Gerber Files
Thank you, Heikki. That's what I'm shooting for, but I'm about 50 volts too low at the moment. Working it out...
Just plug it in, man.
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Re: Princeton Reverb Gerber Files
since there's so many iterations of the Princeton, which exact model is this made after?
and is there a way to add a master volume to the circuit so I don't have to evacuate the house if I want some chrunchy to overdriven sounds.
and lastly, what transformer did you use for your build?
and is there a way to add a master volume to the circuit so I don't have to evacuate the house if I want some chrunchy to overdriven sounds.
and lastly, what transformer did you use for your build?
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Re: Princeton Reverb Gerber Files
There is a schematic and layout in the opening post.VolkerStaub wrote: ↑Tue Mar 14, 2023 11:00 am since there's so many iterations of the Princeton, which exact model is this made after?
and is there a way to add a master volume to the circuit so I don't have to evacuate the house if I want some chrunchy to overdriven sounds.
and lastly, what transformer did you use for your build?
The original poster was last active in 2021, it may take a while to get a response.
Best,
Erwin