The Amp Garage

OK so my new OT came today and I installed it and hooked up my NEW LIGHT BULB LIMITER (ha ha), PLUGGED IN THE SPEAKER CAB and fired it up. seems OK with just rectifier - bulb flashes a bit then dims almost off, stays the same dim light coming off standby add new power tubes - same as above though th...

Not sure exactly what you are looking for but I print full color on a few different substrates - see this thread

http://ampgarage.com/forum/viewtopic.ph ... highlight=

Firestorm wrote:Wow, you did all kinds of terrible things!

Yes and my penance is to shame myself in public, and never do it again....

As I said, having a lot of my recent builds just fire up with no issues I started to get cocky and lazy.. should know better

it's a classic tone 2, 4 and 8 ohm

It has 1/4" jacks - I did not have a shorting jack, but even if I did, I had the cable plugged into the amp, but not the cabinet so it would have still run open Another dumb question.. I assume that if I fried the OT and it has a short now, that I would not be able to come off standy and idle (with ...

Ummmm.. when taking a fresh look at it today I noticed that my cable from the amp speaker jack was not plugged into the cabinet = no load when I was powering up. How brilliant was that? I have 2 attenuators on top of my cab an cables dangling from each and did not pay close enough attention to what ...

Long post, sorry After many successful builds the past year I got a bit cocky and impatient with my new 5f6a build. Variac was at work and I never did build a light bulb limiter, so being impatient and such a great builder now (ha ha) I fired it up anyway.. what could go wrong.. its a simple build, ...

I have a Vox AC30 amp that has a scratchy master volume pot. Figured it would be easy enough to clean (or replace the pot if cleaning does not fix it) However when I started disassembling it to get at the pot it appears I need to remove the pcb from the panel with all the pots attached to get access...

I would love to see this thread form out into a sticky that goes into serious detail on how one would chase down hum and other issues. There are already some great posts.. Something like the steps VacuumVoodoo's comment above and or Martins comments but perhaps fleshed out a little more for a someon...

I think the question should really be how much do you need to drop the volume? I have a few different vvr's installed in a few builds, mostly Marshally stuff since that is my bag. I prefer to scale the whole amp though others will have varying opinions. I think it greatly depends on the type of amp ...

Thanks for the additional comments I would not know where to begin in order to calculate the L and C values - I'm no EE, ha ha I tried to read up about it but what I found is beyond my paygrade.. Anyone care to chime in with an explanation or calculation a layman might understand. If I understand wh...

No though that would make sense to try. I suppose I should in any event just to compare noise levels to the switching supply and existing elevated AC. I suppose I need a decent sized lantern battery to generate enough current - Frys should have something like that However, I am really also curious a...

Hey John Thanks for commenting! perhaps you can elaborate on your grounding remark.. anything in particular that you suggest I do or watch out for? I am still pretty green so the layman's explanation is appreciated if you have a minute.. Any speculation as to why a linear supply might sound better? ...

OK so I found some data about cold and operating resistance for 12ax7's. I did not measure myself (not sure how - maybe someone can elighten me? across pins 4/5?) "the cold resistance of a 12AX7 is about 13.2Ω compared to 84Ω when warmed up. At startup the inrush current into the filament ...

thanks for the replies and insight.. precisely why I posted since I was a little uncertain. How about using an inrush current limiter? The math is a bit over my head but I think a pretty small inexpensive part would work ? Maybe someone can comment I suppose I could also just power a few of the tube...