Marshall - DRP-1 Direct Recording Preamp  [schematic]

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.
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Lobo
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Post by Lobo »

awesome. The JD10 is my current project, but the DRP-1 makes me think....
By the way i like very much the v30 sound i always wanted that speaker....

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rcustoms
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Post by rcustoms »

i got right
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Lobo
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Post by Lobo »

IT looks like some version of the guv'nor. Classic marshall design.

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rcustoms
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Post by rcustoms »

yes ,for my taste is really off road,good drive and very good dist, plus cab sim , headphone amp and external line input
do you want more?
:applause:
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iq01221
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Post by iq01221 »

rcustoms wrote:yes ,for my taste is really off road,good drive and very good dist, plus cab sim , headphone amp and external line input
do you want more?
:applause:
So, this are the three pcbs on the pdf file, right? The other two... It's an amp( on the left) and a energy source( right).
I can't see the third one, looks just like a white page. But, it's ok. É trabalho de mais! :hug:

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rcustoms
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Post by rcustoms »

no. take a look
drp-1 boards.jpg
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Post by iq01221 »

Oh! It's an pdf reader's error, sorry :blackeye . The other stuff( page 2 on "drp1 like amp.pdf") is interesting :wink:

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rcustoms
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Post by rcustoms »

sound really awesome try it :lol:
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Post by Lobo »

Rcustom wich layout creator software are you using? It's really a nice job you've done. I'm using Eagle for my stuff.

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Post by rcustoms »

i using eagle too ,if you read all,the first schema and pcb are in eagle(verified) the last ones are some stuff that i take from the web and i verified too ,all work properly.you need the eagle files?
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Lobo
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Post by Lobo »

Cool i love eagle.
I shoud ask you for the eagle files But i won't, because it'll be no fair to you.
You spend a lot of time and work doing the schem and layout in eagle.
It seems to me a kind of exploitation of a fellow.

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rcustoms
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Post by rcustoms »

i have a tons of info about everything inclusive from this forum ,mi little contribution to all guys of this forum sometimes could be my work,for example i made many pcbs to others like scod super charger overdrive,fulltone plimsoul,mi tube zone etc.,if you need it you wanna it just tell me maybe tomorrow i need some schematic of your collection :P
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Post by rcustoms »

here the eagle files
drp-1.rar
pre amp section
(57.94 KiB) Downloaded 333 times
:D
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Lobo
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Post by Lobo »

Thanks man.

I was checking out the mods for the Shredmaster, and realized that two of them can be tried in the DRP-1: the gain and clipping.

With a SPDT you could switch between the LEDs and two germanium diodes or two 4148. This for clipping.
To gain an SPDT switch to change the resistor that is between terminals 6 and 7 of IC 1, the normal gain for 1M and about 470k for hi-gain.
I do not know if it works, but I think it's worth trying.

By the way, you like my eagle files to jd10? I can send them to you. I have not finished because I'm relying on the original board.
Another problem is that I'm using a library that I've done. I do not know how it would look on your computer and a regular library, but I send without problems.

Thanks.

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rcustoms
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Post by rcustoms »

send me the files and work around your idea,no problem, i like a lot made a new engendro.
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Post by rcustoms »

put face to the project
WAR MACHINE lll.jpg
WAR MACHINE lll.pdf
(1.25 MiB) Downloaded 352 times
:popcorn:
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sorry guys, when i refer to the term engendro i mean a new pedal hybrid.thinks no evil
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round and round web photos
front.jpg
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back.jpg
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Post by rcustoms »

conector side.jpg
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