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DIYstompboxes.com  |  DIY Stompboxes  |  Building your own stompbox  |  "PentaBoost" - 12 volt Pentode Booster using Submini 5672 tube 0 Members and 1 Guest are viewing this topic. « previous next »
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Author Topic: "PentaBoost" - 12 volt Pentode Booster using Submini 5672 tube  (Read 39683 times)
Ratbones
Posts: 33

Drew C.


Re: "PentaBoost" - 12 volt Pentode Booster using Submini 5672 tube
« Reply #180 on: April 23, 2011, 06:56:28 PM »

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!!!
« Last Edit: April 23, 2011, 07:26:35 PM by Ratbones » Logged
MetalUpYerEye
Posts: 356

Josh C.


Re: "PentaBoost" - 12 volt Pentode Booster using Submini 5672 tube
« Reply #181 on: April 23, 2011, 10:56:52 PM »

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: 218



WWW
Re: "PentaBoost" - 12 volt Pentode Booster using Submini 5672 tube
« Reply #182 on: July 18, 2011, 12:51:38 PM »

Hello together,
thank you very much for this great project Rick Cool

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-Layout
PCB-File for etching



I will post the pictures when the pedal is finished  Wink


Greetings
Magnus
Logged

FX:
AMZ Booster, May Booster,
Orange T/B-Booster, Rangemaster's,
Dist. +, DOD 250, The Guv'nor,
TS 808's, Controfuzz, Fuzz Face's,
Tone Bender MKI/MKII/MKIII,
Prof. Tweed, JCM800-Emu,
Dr. Boogey, Obsidian, SansAmp GT2,
Pentaboost, Murder One (Amp)
esdiezy28
Posts: 110

Tony E. - Ohio, USA


Re: "PentaBoost" - 12 volt Pentode Booster using Submini 5672 tube
« Reply #183 on: August 29, 2011, 08:24:55 AM »

Penta Boost is verified using a 6088 pentode tube. Basically the same as a 5672, but smaller total power output.
Logged

Ruby Amp, Noisy Cricket, NPN Boost, modded Mockman 1.0, Bazz Fuss, J201 Fetzer Valve, Valvecaster, modded Valvecaster

Resistance is futile!
iccaros
Posts: 1145


Steve H. - Lesser Seattle Area


Re: "PentaBoost" - 12 volt Pentode Booster using Submini 5672 tube
« Reply #184 on: April 28, 2012, 12:55:53 AM »

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.


Logged
Magnus
Posts: 218



WWW
Re: "PentaBoost" - 12 volt Pentode Booster using Submini 5672 tube
« Reply #185 on: April 29, 2012, 01:24:52 PM »

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  Wink

(finished in November 2011)



Thank you for this great circuit Rick  Cool


Greetings
Magnus
« Last Edit: April 29, 2012, 01:31:37 PM by Magnus » Logged

FX:
AMZ Booster, May Booster,
Orange T/B-Booster, Rangemaster's,
Dist. +, DOD 250, The Guv'nor,
TS 808's, Controfuzz, Fuzz Face's,
Tone Bender MKI/MKII/MKIII,
Prof. Tweed, JCM800-Emu,
Dr. Boogey, Obsidian, SansAmp GT2,
Pentaboost, Murder One (Amp)
frequencycentral
Posts: 4890


Kicking the sh!t of of your speakers since 2008


WWW
Re: "PentaBoost" - 12 volt Pentode Booster using Submini 5672 tube
« Reply #186 on: April 29, 2012, 03:04:05 PM »

Nice to see this project still alive!

Really nice vintage looking layout Magnus.
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Magnus
Posts: 218



WWW
Re: "PentaBoost" - 12 volt Pentode Booster using Submini 5672 tube
« Reply #187 on: April 30, 2012, 04:44:47 PM »

Hello Rick,
thank you  Smiley

It sounds really warm - from vintage to raw - a pleasure to play with  Cool

...and it is very quiet, theres only a small bit of noise on full boost - great!


Greetings
Magnus
Logged

FX:
AMZ Booster, May Booster,
Orange T/B-Booster, Rangemaster's,
Dist. +, DOD 250, The Guv'nor,
TS 808's, Controfuzz, Fuzz Face's,
Tone Bender MKI/MKII/MKIII,
Prof. Tweed, JCM800-Emu,
Dr. Boogey, Obsidian, SansAmp GT2,
Pentaboost, Murder One (Amp)
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