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Topics - dan6896

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Amplifier Discussion / Noisy Cricket problems!

« on: February 02, 2011, 12:01:20 AM »

Ok, so i built a noisy cricket following the schematic on beavisaudio.com,turned it on and plugged my guitar in it sounded pretty good. but when i turned the volume up and started playing it made this horrible fuzzy sound, same with the gain pot.

when i turned the boost switch on it sounded absolutely terrible

. its really hard to describe the sound that it makes. Whenever i play a note it makes the same fuzzy farting sound but it is dead quiet when nothing is being played. I have checked the schematic to my layout and it is all connected fine. i have tried many different speakers and it all sounds the same

any ideas on how to fix this.

in advance thanks for the help,

Tubes and Hybrids / hybrid mini 12au7 practice amp?

« on: January 23, 2011, 02:55:23 AM »

One day i was looking around the internet for little practice amps with tube preamps. I saw the ruby tubey (but that has too many parts) and i also saw the tube cricket but i could not find a schematic. then i remembered seeing something about a tube boost that runs on 9v called the valve caster.(in case you dont know you can find that here: http://www.diystompboxes.com/smfforum/index.php?topic=63479.0

anyway that gave me an idea for a little practice amp like a ruby or noisy cricket. replace the fet input thing (not sure of the propper name) with a valve caster circuit running into the input of an lm386 power amp. Ill post a schem later

my question to you is do you thing this will work.

in advance thanks for the help.

Amplifier Discussion / Marshall Plexi / Fender Bassman Fet preamps?

« on: December 31, 2010, 09:41:09 PM »

hi, i am looking for a fet preamp version of a Marshall Plexi or Fender Bassman, like the ones of runoffgroove.com. i have had look around the interweb and done many google searches but nothing great has come up. So if anyone knows of any could you post a link to the schematic.

Thanks.

Amplifier Discussion / Help with a TDA2050 power amp to go with ROG eighteen preamp

« on: December 24, 2010, 02:39:10 AM »

Hi,
i am designing and hoping to build a simple guitar amp head using the Runoffgroove Eighteen circuit. you can find that here: http://www.runoffgroove.com/eighteen.html

I cant find any power amps using the TDA2050 or TDA2030 for guitar. I just need a simple power amp design that would suit guitar, something around 18-40watts is good. This amp would be using a standard Marshall 1960 4x12 cab.

Also do you have to use a +/- power supply or can you just double the voltage and only use a + power supply?

i have some electronics knowledge but i know nothing about power amps.

Thanks.