Tube Amp Archive

Are all the front pots grounded through the front-face of the chassis? I saw some old post by Carmeron I've seem to neglect/not notice.... Still have the noise on both units, but are shipping off the original 88 to the Finnish tech when he gets back to me about payment options and shipment. Clone d...

jackson rr24
edwards pink sawtooth(esp)

for when i feel like playing W.A.S.P. lol
[img:541:960]http://i.imgur.com/fs1sWja.jpg[/img]

only repair my own stuff but maybe that will change....so ill post anyway. I was recently retired from the air force for medical reasons. with my free time i wanted to start a band but failed to find many others interested in the same music. so instead i started to really focus on making MY sound be...

i took my preamp over to my mother in laws house out in the middle of nowhere. difference in hum was like night and day. there was still some hum if i really(really!!) listened for it but nothing like i was getting in my house. so i guess only solutions would be a faraday cage room or a really nice ...

script is pretty much on my last post. mod what effects it has theory behind it soundclip comparison lesson on how to perform mod thats pretty much it.... and so far im planning on doing: bypass caps cathode resistors plate resistors b+ dropping resistors slope resistor tone stack caps coupling caps...

no need to be sorry. those are pretty much all things i wanted to fix after i had posted it. next video will be much better and i will have my wife video for me and help edit. this was kind of a trial run to weed out these kind of issues. does the general idea seem ok? intro to mod and theory behind...

https://www.youtube.com/user/gorhrut this is my first video. I am still a beginner. these lessons are intended to help introduce people to amp modification/repair. let me know if you guys think this is a good resource, in your opinion, and let me know how i can make this better. I am always open for...

yes.

Bypass the active preamp and get back to us. i dont have an extra pot and the one in there is attached to the active pre. i could pull that off but risk messing up the pre's pcb.... i do have the switch hooked up so i can bypass the gain boost. with that deactivated the hum is a lot quieter but so ...

billyz wrote:Oh crap its ACTIVE ! Could be your preamp.

yeah. passive pickup with active on board gain boost/treble cut.

just recently switched to lace pickups to try and combat the hum but it made no difference. ill take some pics. its possible i am missing something simple. [img:3264:1840]http://i.imgur.com/dXWHjwr.jpg[/img] shows shielded cavity and cover. this guitar does have an actual battery holder but i moved ...

was able to get ahold of another amp. same hum/buzz on that one too even on clean. tells me the preamp wasnt the cause of that problem.

im going to take the preamp to another location to verify. im thinking that my house is just in a bad location with TONS of emi.

so i tried grounding all three filter caps and rectifier to seperate location. didnt work. also tried redoing everything on bus ground system, that didnt do anything either. randomly tried pulling out preamp tubes to see if that did anything, quiet when i pull second preamp tube. dont know if thats ...

It could generate hum, but I've never experimented that it has too much hum to handle, and at least not with EMG mics. You could try to sheild everything better, but my guess is that this is an amp issue. I mean does other amps sound the same with the guitar? Are all grids sheilded? Are any V1,2 an...

so its looking like i should move the ground for the rectifier and (reservoir?) cap onto a different chassis ground point than the others(originals had it on same lug as the power chord ground). does this seem correct? i dont mind trying it out i just want to make sure this is what you are thinking ...