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Topic: GTFO - Full tube high-gain pedal (2x 12AX7) (Read 37362 times)
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pravudh
Posts: 35
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For the L1, The 100uH inductor...this spec means it needs to be a 2-3A inductor?
I am pretty sure I have the right ones in mind but just making sure.
inductor current about 2.1A. here is link for detail that i use. http://www.es.co.th/detail.asp?Prod=63800017there are some point for trim adjustment, you may get HUM if adjust voltage too hight. just decrease it lower until HUM is gone.  |
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gtudoran
Posts: 288
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The PCB in the documents is ready to be printed - no scale, just print it  , but FYI the size is: 83.19 wide by 74.6 high (size is in mm). Best regards, Gabriel Tudoran Analog Sound Hi , I am wanting to build this curcuit but I have a few questions/clarifications on the project .....
Firstly I can"t seem to find the dimentions of the PCB layout , in inches or centimeters is fine .......
The mosfet , will any 400v+ mosfet work ??
I have some toshiba TO-247 2sk2698 that are 500v , will they work ??
Thanx a lot !!!
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lespos
Posts: 20
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Is it right?!  |
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guitarrob
Posts: 52
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Could you use a Toroidal-Inductor for the Boost converter or is it better to use a different type?
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gtudoran
Posts: 288
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I don't think so, i'm using only rod type inductors. Best regards, Gabriel Tudoran Analog Sound Could you use a Toroidal-Inductor for the Boost converter or is it better to use a different type?
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guitarrob
Posts: 52
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I don't think so, i'm using only rod type inductors.
Best regards,
Gabriel Tudoran
Analog Sound
Could you give me an example of the unit you are suggesting to use? I appreciate your time. |
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guitarrob
Posts: 52
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Thanks for the links.
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J0K3RX
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gtudoran (Gabriel ) Did you order your caps from Digikey? I am having a hell-o-va time sourcing all the caps for this thing... You wouldn't happen to have the digikey part numbers or the link to the website that you got them from... I am talking about the HV caps of course... Sorry to be a pain in the ass but I really want to build this mutha!  Thanks, ~Jim |
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If it sounds good, then it is good...
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gtudoran
Posts: 288
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Hey Jim, The caps ar bought from a local store from Romania, i'm afraid i can't help you there. Here is the last GTFO with a custom artwork:    Best regards, Gabriel Tudoran Analog Sound gtudoran (Gabriel ) Did you order your caps from Digikey? I am having a hell-o-va time sourcing all the caps for this thing... You wouldn't happen to have the digikey part numbers or the link to the website that you got them from... I am talking about the HV caps of course... Sorry to be a pain in the ass but I really want to build this mutha! Thanks, ~Jim |
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guitarrob
Posts: 52
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Did you put some LED's by the tube for that Blue glow?
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Minion
Posts: 351
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Hi , I etched my board and I drilled the holes and then went to install some components and realized that the Layout that shows the parts placement does not match up with the PCB ........ The traces and parts placements in the PSU don"t match up and also in other places ......
I"m using the layout and pcb from post #66 ....... Is there an updated layout ??
Thanx
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Go to bed with itchy Bum , wake up with stinky finger !!
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J0K3RX
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Well, whenever my caps come in from Futurlec I will build this thing... I will probably have to re-order them from another company since after I ordered from Futurlec I read the reviews and almost everybody was unhappy with their service... Orders never filled, months to get parts, wrong parts etc...  |
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If it sounds good, then it is good...
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PRR
Posts: 4267
Paul R. - Maine USA
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Power supply explanation: http://www.dos4ever.com/flyback/flyback.html Abour 1/3rd of the way down is the "same" circuit used by Gabriel, but the divider trimmer implemented as 1K+470 so the trim covers 90V-280V (Gabriel's simple 5K trim covers 26V to "infinity"). Also a good justification for using a "dumb" 555 instead of one of the many-many dedicated controllers. |
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J0K3RX
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Still waiting for caps  I guess no gut shots huh, anybody build one yet? |
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If it sounds good, then it is good...
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guitarrob
Posts: 52
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Still waiting for caps I guess no gut shots huh, anybody build one yet? I am waiting for components also but I am building a few different designs, this design is at the top of my list though. |
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Minion
Posts: 351
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Still waiting for caps I guess no gut shots huh, anybody build one yet? Good luck with that , I for the life of my can not find caps that have a small enough footprint that will accomodate the PCB , I also found that my eyesight isn"t good enough to properly solder components on this PCB ...... All those Verticle resistors and the traces so close to each other just made it too difficult of a PCB for me to work with ....... I ended up just redesigning the whole PCB to allow for bigger foorprint caps and for more space between the traces and to allow for the resistors to lay flat , and too alow for terminal blocks and pots closer to the edge of the board ...... Cheers |
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Go to bed with itchy Bum , wake up with stinky finger !!
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gtudoran
Posts: 288
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Hey Jim, hope that i can do some pictures today - but the only unit that i have is the V1 (but that would not pe a problem i hope). Regarding the small foot -print of the PCB - that was the whole thing about ths design to fit in a 1590BB type enclosure - ofcourse that you cand make it a little bigger as you have some space to spare inside the box  .... speaking about seeing - last week i'be broke my glasses... $#@$@#$^%^ c'est la guerre Best regards, Gabriel Tudoran Analog Sound Still waiting for caps I guess no gut shots huh, anybody build one yet? |
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