#1
ive had my jcm800 100w head and 1960a cab for about 2 years now. it still has the same tubes it came with when i first got it. well heres the thing, every time i turn off my amp, it makes a weird sound, like a laser gun from star wars. its never done that when i first got the amp, but its been doin it for about the last 2 or 3 months. the sound still sounds good and all, but its just that one weird sound it makes when i turn it off that has me worried. does anybody now why it makes the sound? is it time for new tubes? thanks for the help.
#2
Awesome, I'd be using it in songs, like turning it on and off randomly. And yeah, it's probably time for new valves anyway. Two years? come on now.
These go to eleven...
#3
new valves bro. do it ASAP
Gibson Les Paul Studio
Squier Classic Vibe Tele
Fulltone Clyde Wah
Fulltone OCD
Fulltone Deja Vibe
Fuzz Factory
Carbon Copy

Boutique Marshall-Style 50watt amp head
Orange 2x12
#4
yea get some new tubes. they are really old and should be changed anyway
[IMG]http://img398.imageshack.us/img398/9148/dawhip005jf4.jpg[/IMG]

Quote by SuperSamuraiGuy
Thanks for answering all my question ssguitar



JCM900 FOR SELL!
#7
i got the amp head about 2 years ago, so it was prolly manerfactured a year before that. so im saying 3 years. its a jcm800 2203
#8
If it's not a reissue, then it was probably manufactured WAY before that. Early 80's maybe..
These go to eleven...
#10
yeah its a reissue. im not as lucky as zack wylde to get the authentic ones that were made in the 80s
#11
Jeez guys, 2 years is not that old for tubes. My 2205 still has tubes from 15 years ago.

Does this one have a reverb tank, it might be that.
Peavey 5150
Mesa Mark IV
Mesa Single Rectifier (Series 1)
Fender Custom Shop Tonemaster
Roland Microcube

-Whitebox OS 1x12
-Port City OS 1x12

Digidesign Eleven RackAxe Fx Ultra
#12
yeah thats what i was thinking reincaster. i dont want to spend money on tubes that arent that old and still have there tone to it. when i notice there tone and clarity is going away, then im going to invest in tubes. i just wanted to know why is there that weird noise when i turn off the amp, and if it was because the tubes, then i would get new tubes. but if its not, i just want to know whats making that noise.
#13
I've got a Valvestate 8080, same problem... gain/chanel volume can make a diference.... when my gain is at 9/10, it will get that weird sound, not when i'm on 8 or below
-------------------------------------------------
- Fender Strat (1988, Japan)
- Epiphone Les Paul (2008, Korea,)
- Epiphone Sheraton (1988, Korea)
- Morgan WG20GEN (2003, Norway)
and some stuff non-used stuff for sale/trade in the Netherlands
#14
Does it sound sort of like electronic zipping noise? My AOR30 head does that as I turn it off. I think it's the caps releasing the last bit of electricity as the amp is tuned off. Does it still do it if you leave the amp on standby for a bit before you turn it off?
Gear:
Gibson SG '61 RI
Fender MIJ 62RI Tele
PRS Singlecut SE
Epiphone Sheraton II
Ibanez AEG10NT
Orange Rocker 30
Blackstar HT5C
#15
Quote by jrm42099
well heres the thing, every time i turn off my amp, it makes a weird sound, like a laser gun from star wars.

that is too cool.

but if ur getting crap tone with that, u need to get rid of it...
Call me "Shot".

ShotRod Guitar Works

Custom Hand-wired Amplifiers and Effect Pedals.

Est. 2007


Source to everything I say about Guitars, Pedals, and Amplifiers: I make them.


UG's Best DIY PedalBoard
#17
i doubt it's the valves, or anything too harmful for that matter. if it gets progressively worse, however, it may be a problem. but 2 years for tubes isn't that long, many of the tube amps my friends have are vintage and have never had a tube change.
Gibson SG Standard + 18volt EMG-81 & 85
Mesa/Boogie Mark IV + Recto 2x12
Keeley Modded BD-2
Vox V847a
Quote by one vision
Bureaucrats gonna crat.

Recognised by the Official EG/GG&A Who To Listen To List 2008