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Topic: "PentaBoost" - 12 volt Pentode Booster using Submini 5672 tube (Read 30182 times)
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Ratbones
Posts: 33
Drew C.
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Well, embarrassingly, I mistook a FIFTEEN ohm resistor for a 1 M resistor... So all my guitar signal was merrily diverting to ground. I've got the thing working now, but my power supply is buzzing nastily. What I can hear sounds cool though! I'm running my 12v ps into a little rc network ps filter that I built, but it doesn't seem to be helping a lot... anything else I can do to clean up the nasty hum?
EDIT: Goodness gracious, apparently I need to increase my caffeine consumption if I'm going to be attempting anything electronics related. I forgot to ground the freakin ground bus that the guitar jacks were hooked to.
Everything is working optimally now, and this thing sounds beautiful!!! I'm totally sold on this circuit, and I plan on building a pentaboost --> valvecaster build very soon!!!
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« Last Edit: April 23, 2011, 07:26:35 PM by Ratbones »
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MetalUpYerEye
Posts: 345
Josh C.
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I've been looking at boosters to build to drive my Blackstar HT5 a little harder on the gain channel. It does 80's thrash sounds well but doesn't have quite enough gain for new style metal...
So I had it narrowed down to the Omega from Runoffgroove, but this is sounding a bit better. What do you guys think I should build: Omega or Pentaboost?
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Magnus
Posts: 184
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Hello together, thank you very much for this great project Rick  I made a small layout that I build as a mojo-version, it is verified and works, here are the files and photos from my work: PentaBoost MkII-LayoutPCB-File for etching I will post the pictures when the pedal is finished  Greetings Magnus |
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FX build:
AMZ Booster, May Booster,
Dist. +, DOD 250, Dr. Boogey,
EHX LPB, Fuzz Face's, Controfuzz, The Guv'nor, JCM800-Emu,
Obsidian, Orange T/B-Boost, Prof. Tweed, Rangemaster's,
SansAmp GT2, Tone Bender MKI/MKII/MKIII,
TS 808's, Pentaboost
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esdiezy28
Posts: 110
Tony E. - Ohio, USA
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Penta Boost is verified using a 6088 pentode tube. Basically the same as a 5672, but smaller total power output.
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Ruby Amp, Noisy Cricket, NPN Boost, modded Mockman 1.0, Bazz Fuss, J201 Fetzer Valve, Valvecaster, modded Valvecaster
Resistance is futile!
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iccaros
Posts: 1145
Steve H. - Lesser Seattle Area
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My quick build... Had a small box wanted to do something with it. \ Still needs painting, but it is cool as a lead boost. I changed the output cap to .022 so it gives a nice treble boost, not much gain.   |
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Magnus
Posts: 184
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Hello together, I don't know if I have posted my PentaBoost MkII in the "Picture-Thread" yet (I will look for it when I have some more time), but I said I will post the pictures here - so here it is (finished in November 2011)      Thank you for this great circuit Rick Greetings Magnus |
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« Last Edit: April 29, 2012, 01:31:37 PM by Magnus »
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FX build:
AMZ Booster, May Booster,
Dist. +, DOD 250, Dr. Boogey,
EHX LPB, Fuzz Face's, Controfuzz, The Guv'nor, JCM800-Emu,
Obsidian, Orange T/B-Boost, Prof. Tweed, Rangemaster's,
SansAmp GT2, Tone Bender MKI/MKII/MKIII,
TS 808's, Pentaboost
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frequencycentral
Posts: 4880
Kicking the sh!t of of your speakers since 2008
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Nice to see this project still alive!
Really nice vintage looking layout Magnus.
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Magnus
Posts: 184
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Hello Rick, thank you  It sounds really warm - from vintage to raw - a pleasure to play with ...and it is very quiet, theres only a small bit of noise on full boost - great! Greetings Magnus |
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Logged
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FX build:
AMZ Booster, May Booster,
Dist. +, DOD 250, Dr. Boogey,
EHX LPB, Fuzz Face's, Controfuzz, The Guv'nor, JCM800-Emu,
Obsidian, Orange T/B-Boost, Prof. Tweed, Rangemaster's,
SansAmp GT2, Tone Bender MKI/MKII/MKIII,
TS 808's, Pentaboost
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