The Amp Garage

i did just this after posting



noooooooob alert!!!!

thanks guys

engineers are sooo smaht!!

Howard Dumble built the same thing into the amp itself and provided it with a footswitch labelled "PAB" (Pre Amp Boost). Tell your buddies its your Dumble mod. Cheers, Ian this has me thinking though.... got a schemo? cause ill build it! i aint afraid!! and turn it up! STORTION!!! :twisted: :twisted:

EP Booster http://s21.photobucket.com/user/reverweb/media/EPBc.jpg.html What FET types are recommended for Q1? maybe try a J201 if you have one handy. also an MPF102 will probably work... might sound shitty though. i like using 2SK117 fets in stomp boxes. i forgot to mention (probably unnecessarily...

There is also the AMZ MOSFET booster, which also uses BS170. See: http://www.muzique.com/schem/mosfet.htm Forum member Sliberty built me one of these not too long ago. It is currently the pedal i use most along with a Geek triple B. As a clean boost it is excellent. oh sweet! thats the one! i built...

what would it take to sub a mosfet in there?

Q1 in the EP booster is drawn as a JFET. I see the J201 are getting hard to find these days (at least from the mainstream suppliers). I've been using the J113 with good success, and it's a tiny bit quieter than the J 201. You may need to adjust the value of the 6K8 resistor in the drain. Ideally, y...

oh yeah, i asked my trusted professor at school today and here is what he said he told me that if the booster stage increases the average DC current this, along with the bias voltage will cause the tube to saturate and red plate if there isnt sufficient limiting circuitry, damaging the tube. he als...

wow... really??? i offended you with a non-sequiter? engineers are obviously not stupid. see the way i spelled it that time? ... I don't want to beat this dead horse, but I read what you wrote...nothing more and nothing less. If there was a joke in your original post you hid it well. I missed the m...

EP Booster http://s21.photobucket.com/user/reverweb/media/EPBc.jpg.html What FET types are recommended for Q1? maybe try a J201 if you have one handy. also an MPF102 will probably work... might sound shitty though. i like using 2SK117 fets in stomp boxes. these are silicon n-channel low noise audio...

oh yeah, i asked my trusted professor at school today and here is what he said he told me that if the booster stage increases the average DC current this, along with the bias voltage will cause the tube to saturate and red plate if there isnt sufficient limiting circuitry, damaging the tube. he also...

As far as I know you're good man. I got the joke. Can't speak for anyone else, but I can say that I didn't take any offense with this thread or your enthusiasm for the mysterious world of tube theory. thanks bro... i was kinda in a bad mood there... one thing to do though, CRANK DAT SHIT!! :twisted:

ppssshh engineers are stoopid, scuse me while i crank this shit Yes, there are some of them on this board. And they are probably thinking you are stoopid for asking whether the SHO will damage your tubes and ignorant for offending a group of people with your head planted firmly in your ass. :P But ...

xtian wrote:Anyway, you'll drive the tube into cutoff LONG before damage, right?

yeah! right! i thought this was the idea!

you guys are my new friends

SUPER HARD ON!!

not WELL WITHIN THE OPERATING PARAMETERS!!!

thanks for the responses guys

ppssshh engineers are stoopid, scuse me while i crank this shit

so it doesnt matter what the input Vpp is? apparently the SHO will boost to something like 7.something peak to peak. this wont harm the tube? i have an engineer friend that keeps warning me about too much gain going into the amp, but i thought thats where the TONE comes from. why is it called the su...