Tube boost + overdrive running off a 9 volt battery

[Ripthorn]

I get 11.60V out of my power supply passing through the 7812 voltage regulator... dunno if it's enough... 
Maybe I should try another adapter, as shimster suggested...

Is that with load?  Power supply voltages will change a good bit with and without load, especially if what is feeding your 7812 doesn't have the juice the tubes are asking for.

[Renegadrian]

For all the new menbers having trouble with the power supply, I made this...Hope it helps!

[tranceracer]

Very nice!  Thanks!

[Ripdivot]

Keep in mind that if you want to get proper voltage regulation with a 7812 regulator you have to feed in at least 14.5 volts. The input has to be at least 2.5 volts higher than the output.

[lazerphea]

For all the new menbers having trouble with the power supply, I made this...Hope it helps!

Thanks man, but I already use a 100uf cap at the input and another 100uf cap at the output of the 7812... I think I really need a better adapter

[bassmannate]

No, the one's you're thinking of are audio coupling capacitors. This one is not in the signal chain. It's across the +9v and the ground to help filter any noise coming in on the power adapter.

[Renegadrian]

...I already use a 100uf cap at the input and another 100uf cap at the output of the 7812...

I believe he said the right thing, he has 2 caps and not only one placed at the 7812. So no signal chain involved,  reading what he wrote...

[biggy boy]

...I already use a 100uf cap at the input and another 100uf cap at the output of the 7812...

I believe he said the right thing, he has 2 caps and not only one placed at the 7812. So no signal chain involved,  reading what he wrote...

I also use a cap before and after the voltage regulator, but I'll put a resistor inline before the first cap to make an RC filter

-----/\/\/\-------|---------------REGULATOR--------|------------
                     _|_                                          _|_
                     ___                                         ___
                       |                                             |

[bassmannate]

...I already use a 100uf cap at the input and another 100uf cap at the output of the 7812...

I believe he said the right thing, he has 2 caps and not only one placed at the 7812. So no signal chain involved,  reading what he wrote...

Ah, so he did. All I read was the input and output. Didn't read the 7812 part.

[KorovaMilkBar]

For all the new menbers having trouble with the power supply, I made this...Hope it helps!

haha, man your cool renegadrien! i was pretty sure  i knew how to put that all together but the diagram always helps me about a billion times. thanks!

  <----you

[Renegadrian]

Yeah, I am glad my drawing is helpful to someone!!!

[lazerphea]

...I already use a 100uf cap at the input and another 100uf cap at the output of the 7812...

I believe he said the right thing, he has 2 caps and not only one placed at the 7812. So no signal chain involved,  reading what he wrote...

Exactly! Ripthorn suggested me to do so

[lazerphea]

I get 11.60V out of my power supply passing through the 7812 voltage regulator... dunno if it's enough... 
Maybe I should try another adapter, as shimster suggested...

Is that with load?  Power supply voltages will change a good bit with and without load, especially if what is feeding your 7812 doesn't have the juice the tubes are asking for.

Ehm, sorry... what do you mean by "load"
Oh, and maybe could help to know that the tubes don't light up at all...

[Ripthorn]

What I was asking is if the 11.6V was when the tubes were drawing their current that they need.  If the tubes don't light up, that indicates that the heaters aren't getting either enough voltage or enough current.  If your 7812 doesn't have a heatsink, it is possible that it can't dissipate enough power to continue delivering the current you are asking of it.  Just to clarify, is the 11.6V coming out of the 7812?  What are the specs of the power supply that is feeding the 7812?

[KorovaMilkBar]

alright, so i have my pedal pretty much working nicely aside from the brutally loud hum. i checked my voltage at pin 6 again (with load) and its running at a slightly hot 13.6 volts. is this not good? will it greatly reduce the life of the tube? also, will the voltage regulator fix this along with the hum? you know, i would think a voltage regulator would like, you know, regulate voltage, im just wanna know if its gonna do something like bake cookies instead.

[svstee]

I'm sure this has been addressed before, but I find that my both my Valvecaster and Subcaster are just too bassy. Would a simple input/output cap change take care of that?

[biggy boy]

I'm sure this has been addressed before, but I find that my both my Valvecaster and Subcaster are just too bassy. Would a simple input/output cap change take care of that?

Yes
I changed the cap between the first and second stage to a smaller value. Check back a bunch of pages it was discused there.
I did it from the start, so I don't have any way of comparing it to the original value of cap.

Edit:
heres the page.
http://www.diystompboxes.com/smfforum/index.php?topic=63479.1100

[shimster]

I finally recorded a little clip of my latest pedal, the twin valve circuit that I've been working on for the past 3 weeks.  I'm playing a gibson sg special through a cornford harlequin amp.  Let me start by saying I'm super picky about my guitar sounds, and I'm disappointed in the sound of this recording.  I think the close micing technique and low amp volume takes away from the brilliance of this pedal.  I'm saying that now having just come back from a jam session with some friends.  I had this pedal plugged into a mesa boogie dual rectifier and it sounded really sweet.  With this circuit I think I went too far into the "brown sound" territory for my taste.  Future pedals will likely be based on a cleaner tube circuit with a jfet boost to achieve overdrive.  Well, enough talk, here's the sample:
http://homepage.mac.com/dshimmyo/musicForBlog/blinky01Test.mp3

[biggy boy]

Sounds good Dan. I like it.
Nice guitar playing too.

[tranceracer]

WOW! Sounds great! You really nailed down that Punchy, Crunchy distortion!  Sounds like a very versatile tone. 

If it sound good thru that Harlequin I can imagine how it sounds thru your Mesa!   

Great licks too!