Tell me about the Death Cap



Tell me about the Death Cap

Postby conky » Wed Jan 20, 2016 7:10 am

I just picked up a 2nd gen Model T and I'm paranoid about the death cap that a lot of the older amps had. This one has a 3 prong cord but I think it came stock. Has a ground switch too, but I haven't messed with it. I'll try to post gut shots soon.
conky

User avatar
IAMILF
IAMILF
 
Posts: 2165
Joined: Tue Nov 16, 2010 2:46 pm
Location: Georgia

Re: Tell me about the Death Cap

Postby fever606 » Wed Jan 20, 2016 9:19 am

In for second gen T knowledge...
fever606

User avatar
IAMILF
IAMILF
 
Posts: 2618
Joined: Sun Jul 25, 2010 11:03 pm
Location: district of columbia

Re: Tell me about the Death Cap

Postby braaandooon » Wed Jan 20, 2016 9:56 am

Death cap in my old Ampeg J12 went bad recently. Symptoms displayed were ghost notes and the occasional tripping of breaker in my home, probably due to the faulty cap leaking AC to the amp chassis. Ended up removing cap and adding a proper cord and now good as new. Was always under the impression that amps that came stock with 3 prong cords didn't utilize a death cap but I could be wrong.
Biggest Muff --> http://imgur.com/Tif0mdU

Image
braaandooon

User avatar
experienced
experienced
 
Posts: 549
Joined: Wed Feb 12, 2014 10:46 pm
Location: Injiana

Re: Tell me about the Death Cap

Postby potatofarmer » Wed Jan 20, 2016 12:03 pm

It's a cap from one side of the mains power to the chassis ground to filter out noise. Usually there'll be a switch so you can select which is getting filtered (live or neutral) - or more accurately so you can compensate for reversed wiring at the venue.

If the cap starts shorting, AC power goes through the chassis. If you have a 3-prong plug and you're plugged into a properly-wired 3-prong outlet, the ground prong will probably look like a more attractive path to ground than through your guitar and body, so it'll probably trip the breaker before you die.

Still a good idea to remove them, as that's a whole lot of "if" and "probably" and most venues were wired by hacks.

If you've already got the 3-prong, it's just a matter of snipping out the cap. It may have been done already.

edit: found the schematic here, just because I've never looked at it: http://music-electronics-forum.com/t34524/#post321027
potatofarmer

User avatar
interested
interested
 
Posts: 46
Joined: Fri Feb 06, 2015 12:14 pm
Location: Pgh

Re: Tell me about the Death Cap

Postby ShaunNecro » Tue Jan 26, 2016 1:03 am

This can happen. This is bad. You can get safety caps now that don't do this if they blow.



Image
Wills Dissolve
http://facebook.com/willsdissolveband
https://willsdissolve.bandcamp.com
http://shaunnecro.tumblr.com/
NSFW: show
Iommic Pope wrote:Remember, she was dead when you got there......but you couldn't have been there-you were on a jumping castle at that point in time.

We just call it the "doom" room in the hope we might lure hipster girls there...into our rape vans....I mean vans of righteous wizarding.
ShaunNecro

User avatar
FAMOUS
FAMOUS
 
Posts: 1521
Joined: Sat Feb 16, 2013 8:21 pm
Location: Houston, Texas

Re: Tell me about the Death Cap

Postby chillerthanmost » Thu Jan 28, 2016 1:17 pm

First thing I do with ALL my amps is a three prong and remove that cap. It's as easy as clipping it off, or you can solder it off if you want a cleaner look. Very simple job that should be a must, although I've never experienced the negative side of why it should be done. My first gen model T came with a three prong and I don't remember if it had a death cap or not. I'm gonna open it up today to bias the new tubes I just put in, so I'll see if I took it out or not.
chillerthanmost

User avatar
Supporter
Supporter
 
Posts: 1134
Joined: Mon May 17, 2010 3:02 am
Location: Salinas, CA

Re: Tell me about the Death Cap

Postby ShaunNecro » Thu Jan 28, 2016 1:38 pm

The only reason why you should keep it in with a three prong cable is because you can never be sure that the ground is going to be hooked up at every single place you play at, and you sure as hell want that cap in there for those unlikely situations.
Wills Dissolve
http://facebook.com/willsdissolveband
https://willsdissolve.bandcamp.com
http://shaunnecro.tumblr.com/
NSFW: show
Iommic Pope wrote:Remember, she was dead when you got there......but you couldn't have been there-you were on a jumping castle at that point in time.

We just call it the "doom" room in the hope we might lure hipster girls there...into our rape vans....I mean vans of righteous wizarding.
ShaunNecro

User avatar
FAMOUS
FAMOUS
 
Posts: 1521
Joined: Sat Feb 16, 2013 8:21 pm
Location: Houston, Texas

Re: Tell me about the Death Cap

Postby crochambeau » Thu Feb 11, 2016 7:42 am

Yeah, just clip the cap out. The issue is that when they fail, they fail short.

If noise appears because of this (like periodic motor noise, dirty on the AC mains, etc) simply slap a safety cap ACROSS hot and neutral, I don't reference chassis at all where mains is concerned. Has to be a safety cap though, which fail open.

http://www.justradios.com/X1Y2capacitors.html

ShaunNecro wrote:The only reason why you should keep it in with a three prong cable is because you can never be sure that the ground is going to be hooked up at every single place you play at, and you sure as hell want that cap in there for those unlikely situations.


For noise issues? I can't think of a single instance this has bitten me (though I have indeed been hit with mains a time or three), but I'll give you the benefit of the doubt. If for whatever reason you need a cap referencing the chassis, snip the OE piece of shit out and plant an X1Y2 in its place.
crochambeau

User avatar
FAMOUS
FAMOUS
 
Posts: 1425
Joined: Mon Jul 20, 2015 12:49 pm
Location: Cascadia

Re: Tell me about the Death Cap

Postby D.o.S. » Fri Mar 11, 2016 3:43 pm

Death Cap for Cutie?
NSFW: show
for easy reference:
Image

good deals are here.
escapecraft is here.
Well there's a creep in the cellar that I'm gonna let in
There's a hole in his brain where his mind should have been

Will Carruthers wrote: “Just play one note,” Sonic had advised us as we travelled down to the M1. “Keep it simple. One note. No fancy stuff.” By “fancy stuff” he meant two notes.

Chankgeez wrote:There's no "i" in ILF.
D.o.S.

User avatar
IAMILFFAMOUS
IAMILFFAMOUS
 
Posts: 27923
Joined: Sun Jul 03, 2011 8:47 am
Location: Ewe-Kay

Re: Tell me about the Death Cap

Postby CyaNitrate » Sat Mar 12, 2016 1:34 pm

ShaunNecro wrote:The only reason why you should keep it in with a three prong cable is because you can never be sure that the ground is going to be hooked up at every single place you play at, and you sure as hell want that cap in there for those unlikely situations.


You can be sure actually. When I first got into vintage Fender amps, one of the first things I bought was an outlet tester. You can get them at just about any hardware store for pretty cheap, and a huge peace of mind. Just plug it into an outlet and it will tell you if it's wired properly, and it's small enough, like golf ball sized, to keep in a gigbag, case, or the bottom of your amp.

Death cap needs to go. You can keep it in storage if all original parts are important to you, but it's called a death cap for a reason.
jwar wrote:BRO! There is only one order! Bass>fuzz>fuzz>fuzz>fuzz>overdriven amp. :)

goroth wrote:Come up here and fuzz party. Yes. Fuzz party. It is a legit verb.
CyaNitrate

User avatar
experienced
experienced
 
Posts: 875
Joined: Wed Jun 26, 2013 11:24 pm
Location: The Desert

Re: Tell me about the Death Cap

Postby ShaunNecro » Sat Mar 12, 2016 5:00 pm

CyaNitrate wrote:
ShaunNecro wrote:The only reason why you should keep it in with a three prong cable is because you can never be sure that the ground is going to be hooked up at every single place you play at, and you sure as hell want that cap in there for those unlikely situations.


You can be sure actually. When I first got into vintage Fender amps, one of the first things I bought was an outlet tester. You can get them at just about any hardware store for pretty cheap, and a huge peace of mind. Just plug it into an outlet and it will tell you if it's wired properly, and it's small enough, like golf ball sized, to keep in a gigbag, case, or the bottom of your amp.

Death cap needs to go. You can keep it in storage if all original parts are important to you, but it's called a death cap for a reason.


Allow me to rephrase; aside from personally being there with an outlet tester, you cannot be sure that every venue has the ground connection. And hell no should you keep the original caps in there, that's why I suggested replacing them with a safety cap. Some things should be kept original, some things like a three prong cable and the death cap should be replaced with the safer modern alternative.
Wills Dissolve
http://facebook.com/willsdissolveband
https://willsdissolve.bandcamp.com
http://shaunnecro.tumblr.com/
NSFW: show
Iommic Pope wrote:Remember, she was dead when you got there......but you couldn't have been there-you were on a jumping castle at that point in time.

We just call it the "doom" room in the hope we might lure hipster girls there...into our rape vans....I mean vans of righteous wizarding.
ShaunNecro

User avatar
FAMOUS
FAMOUS
 
Posts: 1521
Joined: Sat Feb 16, 2013 8:21 pm
Location: Houston, Texas

Re: Tell me about the Death Cap

Postby potatofarmer » Sun Mar 13, 2016 4:11 pm

There's also the "Reverse Bootleg Ground" which a 3-light outlet tester won't detect, but a non-contact voltage tester will: http://ecmweb.com/contractor/failures-o ... ng-exposed
potatofarmer

User avatar
interested
interested
 
Posts: 46
Joined: Fri Feb 06, 2015 12:14 pm
Location: Pgh

Re: Tell me about the Death Cap

Postby kbit » Thu Mar 17, 2016 1:03 pm

D.o.S. wrote:Death Cap for Cutie?


:lol: :thumb:
D.o.S. wrote:I'm fucking stupid and no one should operate under any other premise.
kbit

User avatar
IAMILFFAMOUS
IAMILFFAMOUS
 
Posts: 11414
Joined: Sun Dec 12, 2010 1:16 pm
Location: Philadelphia

Re: Tell me about the Death Cap

Postby gnomethrone » Thu Mar 17, 2016 1:17 pm

Image
lost in music wrote:Drop out of life with cone in hand. Follow the scoops to-ah the ice cream man.


good dealings here:
NSFW: show
Ancient Astronaught, fuzzlord!, onyxrhino, lordgalvar, JoeTheStache, kbit, BoatRich, oscillateur, grindonomicon, doommeow, fever606, Bearstripes, Casavettes, Faldoe, jellyfishfuzz, morange, Teej212, MEC, ianmarks, JWAR, Raj007
gnomethrone

User avatar
FAMOUS
FAMOUS
 
Posts: 1582
Joined: Tue Jun 17, 2014 1:39 am


Return to ilovedoom.org



Who is online

Users browsing this forum: No registered users and 5 guests


Sponsored Ad. (Please no inflated/repetitive clicking. Thanks!)

Advertisements help support ILF


ilovefuzz.com is not responsible for user-submitted content. Users participate at their own discretion and risk.