Monday, May 9, 2016
Emerson Customs Paramount
This is Emerson's second offering. Essentially it's an Electra Distortion without the clipping diodes and it's pretty similar to the EM Drive. It adds a tone control that pans between 2 capacitors at the input. It's laid out for board mounted pots and will fit nice in a 1590B.
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Hi bro, awesome as usual!
ReplyDeleteAny suggestion to replace the mpsa13?
Socket and experiment with high gain transistors you have on hand. Also try this:
Deletehttps://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=mpsa13%20equivalent
Two 2n5088 in darlington (https://en.wikipedia.org/wiki/Darlington_transistor). Mpsa13 is a darlington transistor in one case. I am using two 2n5088 instead of mpsa13 in BazzFuss and it works fine.
Deleteso you replace an MPSA13 with two 2n5088s?
DeleteI wonder how they are connected to the board...
help me, I really want to have this in my pedalboard
DeleteI project pcbs myself. Please read about Darlington in link that I've paste before.
DeleteAdding a tip to Milosz advice: if you look at Darlington schematic symbol you may easily notice how the two bipolar are connected.
DeleteI've seen the link you shared above, honestly I didn't really understand hahaha. I'm noob in this field, and my English is not really good. but surely i'll try to learn about it though.
Deletethanks for your replies, bros
Berkicau, check out this link: https://learn.sparkfun.com/tutorials/how-to-read-a-schematic
Deletethanks everyone, now I understand how to wire that two 5088s in darlington.
Deletei followed this diagram to wire my 2n5088s. it still doesn't work.
Deletehttp://www.radiomuseum.org/images/tubecharactdiag/small/m/mpsa13_innen.png
is this what you meant by darlington thing?
noob question i want to buy a mylar film caps that 100nf how many volts?thanks
ReplyDeleteThe 100v ones work fine.
DeleteThanks
ReplyDeleteI've built it using MPSA13 and did double check on the layout, it didn't work.
ReplyDeleteuse o 2n3904, funciona muito bem
DeleteWhooppss, I forgot to turn my PS when engaging the effect.
ReplyDeletethis one is verified, and awesome as usual!
Halo mas, salam kenal. Tinggal di Jogja ya mas?
Deletesalam kenal jg mas.
Deletedari tahun 1999 sampe 2014 di jogja mas, sekarang sudah di kalimantan
Oh kirain masih di Jogja mas. Kira2 kalo mau konsul sama mas bisa nggak ya? Hehe
DeleteBoleh mas mari
DeleteVia email aja ya mas. Terima kasih banyak mas.
Deletesiap
DeleteHi, Berkicau, what process did you do? Thanks
Deleteif I want to make my tone darker, which cap should I change?
ReplyDeletethe 220 or 2.2 one?
Try upping the 220n to 470n. You could also play with the output cap too (100n cap to Vol 3)
Deletethanks bro
DeleteI love the mild drive it produces, but the tone is too bright for me
where the switch ar conected? it doesn`t appeard in the board
ReplyDeleteMPSA13 is the same of KSP13?
ReplyDeleteDidn't find any info about that... both are darlington.
Not familiar with the KSP13. A lot of high gain transistors will work in this circuit, so I wouldn't be surprised if it did work. Use a socket and experiment.
DeleteHi there, I'm quite new to this so firstly I'd like to thank you for such an excellent site, it is very much appreciated!
ReplyDeleteQuestion: would the circuit benefit from clipping diodes and if so, where would they go? From the final output trace to ground?
I haven't built the Paramount, but I have built the EM Drive, which I added clipping to and really liked it. This is pretty similar to the EM Drive and would not be shocked it adding some clipping diodes helped it out some. And they'd go from Volume 3 to ground.
DeleteThanks for such a quick response, that is helpful. Sounds like it would be worth experimenting with. Cheers
DeleteIf so, I assume it would be fine if I use an spst toggle. Dont you think?
DeleteYeah that'd work
DeleteAnother newbie question (apologies): where would I connect the on/off led and resistor with this layout?
ReplyDeleteCheck out the General Layout Notes tab at the top of the page. There's a diagram for off board wiring.
DeleteHi, the circuit sounds great! However, when the gain is at minimum there is still a light overdrive. I don't mind this, but I'm just wondering if it is supposed to be completely clean when the gain is rolled off? In which case, what might I have done wrong?!
ReplyDeleteSounds like you built it right to me. Even with the gain all the way down signal is still passing through the circuit, so some overdriven signal is likely.
DeleteThat's good news, thanks for the reply. And thanks again for the great site 😄
DeleteThis comment has been removed by the author.
DeleteHi, Joe. What process did you do?
DeleteI have a a little doubt, maybe a noob one. Why does it have two hole markers on some of the components? Mainly on capacitors
ReplyDeleteThose are so you can use different size film capacitors.
DeleteOh, thanks for your fast reply.
DeleteCurious thing: my first comment is shown as Unknown
Yeah, I don't understand why that happens sometimes. Google/Blogger has it's quirks.
DeleteIt's verified. Build this circuit using BC517, hard to find MPSA13 at local store. Yes, it's working as charm. Thank you.
ReplyDeleteWorks fine. I didn’t have any MPSA13, so I decided to make my own Darlington transistor. I tried a bunch of NPN transistors, and most combinations had about the same gain, but they changed the behavior of the tone pot, especially when it was turned all the way down. I ended up using two 2N3904 transistors, and it sounds great.
ReplyDelete