Tube Amp Archive

i have a'99 rivera knucklehead 55 head. i noticed what sounded like a microphonic tube the other day. not too bad but just annoying enough to bug me. i tapped around and found it to be the phase inverter position and a nos tungsram 12ax7 so i swapped it out for another tube. still microphonic though...

after a couple of updates, this is is where i am.
[img737]http://i10.photobucket.com/albums/a131/ ... 0ef1d3.jpg[/img]

the c20 and c30 are great little grab and go amps. i depeavey'd the input and tone stack circuitry on my c20 and it is a monster.

weber bbq drama? what did i miss?

scavenging and working on a few elinchrom 3000w/s flash control packs and here are a couple of gut shots. [img:1024:682]http://i10.photobucket.com/albums/a131/teefus/_AZ_1584_zps6f1f59b3.jpg[/img] [img:951:1024]http://i10.photobucket.com/albums/a131/teefus/_AZ_1587_zpsa5c354cc.jpg[/img] it's hard to...

thanks, this is the version that uses ldrs for switching.

when going from standby to "on", channel 2 (the cleaner channel) would not work. all of the appropriate lights would work on the control panel. sometimes there was a slight wind noise in the background. footswitching to channel 1 (lead) would work and sometimes footswitching back to channel 2 would ...

i'm a huge buck dharma fan. thanks for posting.

don't use goof-off indoors either. pretty strong fumes.

thanks for everyone's help. this one has the standard incandescent pilot light.

the circuit calls for a 3a. currently my friend has a 2a in there. i haven't told him yet.

is 2.5a enough? like this one?
http://search.digikey.com/us/en/product ... -ND/483970

12 poles on the outside, 3 poles on the inside. front of switch is labeled "made in the usa" 3612 8 and 467. thanks.

front pic
[img768]http://i10.photobucket.com/albums/a131/ ... 0881-2.jpg[/img]

back pic
[img:897:1024]http://i10.photobucket.com/albums/a131/ ... 0882-2.jpg[/img]

this is a very early one, june 1960. the power switch is a rotary 4 position type. off-standby-on+on-.
i'll post a pic later. thanks.