Is This Normal?

[Beerdog80]

I pickup radio signals when using my wah

what wah are you using?

Crybabys are notorious for doing crap like that. you could shield the insides with copper tape or shielding paint.

 

[996ttcab]

I agree Beerdog. Sounds like his electrical source is acting as an antenna. I guess anything is possible hence the suggestion of a line conditioner.

In order of costs:

(1) remove all EMF sources far, far away. Other side of house if possible, jk.
(2) change plugs;
(3) move amp away from plug;
(4) instrument cable and speaker cable (i.e., buy better ones);
(5) Surge protector;
(6) Line conditioner;
(7) have someone check your power tubes, they start making noise when going.

 

[LPV]

GS, you got the 2204 right ? Take it in for a tune up somewhere and ask them to check that the power tubes are matched and bias. Was it modded ? If it has an added effects loop, unless you really need it, get it taken out.

Personally, unless you are sure they are brand new, swap the preamp tubes. Its cheap. Put in a couple hundred bucks getting it looked at you've got yourself a great head there.

 

[Beerdog80]

GS, you got the 2204 right ? Take it in for a tune up somewhere and ask them to check that the power tubes are matched and bias. Was it modded ? If it has an added effects loop, unless you really need it, get it taken out.

Personally, unless you are sure they are brand new, swap the preamp tubes. Its cheap. Put in a couple hundred bucks getting it looked at you've got yourself a great head there.

Good point... I actually forgot a very likely cause..

After time, capacitors-especially filter caps- stop working as they normally should. Have them changed out if you take it in for a tune up. It only takes a few minutes to change those out in that model. Very easy.

 

[toastboy]

2203 JMP?

No pedals nor guitar plugged into it.
Just MV at 10 and PAV dialed up.

I agree these JMPs are awesome. The tone is so undescribable
I must get a hot plate to get the sweet spot of it.
I'm still deciding between Weber or THD, what's PRO and CON between these 2.

I can't pass MV 1.5, it's TOO LOUD.

Yes mine is a JMP 2203 but I've taken 2 power tubes out to make it 50W.

IMO Weber mass is the most versatile and at least I haven't had any tone
reducing when using it. If you put it at max attenuation then it might get a
little muddy, but that's way too quiet for my purposes anyway.

 

[GibsonSlash]

Thanks for all inputs.

Here's what I did last night.
- I bought a brand new Planet Waves Speaker Cable. (Planet Waves cables are the most expensive sold here in L&M Canada, unfortunately they don't sell Monster Cable)
- I used Planet Waves Guitar Cable as well. (I don't think it's faulty, it's built like a tank, and pretty much new)
- I moved the amp into my bedroom and plugged alone into an outlet. There's no electronics surrounding the amp, just my bed and closet.

Here's what I found. (I used my GoldTop and Classic Antique to do this)
- The humming still there. But I guess I can live with it as yesterday I tested a JCM2000 head, it hummed the same way when I cranked the MV to 10. (With the guitar plugged in)
- Here's what irritated me, the Radio Frequencies still being picked up. But when I unplugged the guitar, the RF was gone. I thought it was my guitar that caused this, I changed to my Classic Antique, the RF was still there. So there's no chance my guitars were the cause of this.

I pretty much remember the RF thing didn't happen when I test the amp at the seller's house. It's quite. But at that time he was using his Marshall 4x12 cab.

Could it be my 2x12 cab that caused this?

P.S: Anyone has any good tech amp references in GTA area? Also what will be a rough estimated cost to get this done?

 

[GibsonSlash]

It is 3 plugs.
But I will test it tonight using another power cable.

AND...is your power supply grounded i.e. 3 Plugs?

 

[GibsonSlash]

No

Do you have flourescent lights on in the room???? Ive been told that will cause it.

Soon

Where's the ?

Not modded, all original.

Was it modded ? If it has an added effects loop, unless you really need it, get it taken out.

How much will I be looking for this?
Hopefully I can get references for this in my area.

After time, capacitors-especially filter caps- stop working as they normally should. Have them changed out if you take it in for a tune up.

 

[GibsonSlash]

I will try this later tonight as well.
Any recommendation what brand I should look for and what VA size etc.?

(6) Line conditioner;

 

[Guido]

what wah are you using?

Crybabys are notorious for doing crap like that. you could shield the insides with copper tape or shielding paint.

Exactly, a crybaby wah

It doesnt really bother me since I dont use it a lot and it does it when Im at 100% gain, and a 100% metal setup, which I almost never use

 

[LPV]

Google is your friend

http://www.jemsite.com/forums/f30/tube-amp-radio-interference-problem-68930.html

 

[996ttcab]

I will try this later tonight as well.
Any recommendation what brand I should look for and what VA size etc.?

I use Furman PM-Pro Series II in both of my rack units. This may be over kill and they are a little pricey, but check out the features as the ones with the true filters and a true line conditioner as opposed to surge protector are expensive.

Here is a whole page of them. You can read about the filters on the Pro models. I believe they have two on this link. Sucks having to drop more dough, but if the problem is annoying enough. What sucks is it still may not solve your problem 100 %, but then again it might.

I use line conditioners to get the most of my amps be it home stereo or guitar. The regulation of voltage keeps them in their sweet spot so to speak. Makes a little difference. If you get the pro line stuff, you will need a plug adapter which is cheap unless you have a dedicated 20 amp line.

http://accessories.musiciansfriend.com/power-essentials/power-conditioners

 

[GibsonSlash]

Which Weber Mass are you using?
I guess I should look for at least Weber Mass 100 watt or bigger.

IMO Weber mass is the most versatile and at least I haven't had any tone reducing when using it.

 

[GibsonSlash]

I just found an Amp Tech near Pape Ave & Danforth Ave.
When I explained about the RF thing, he said it can be fixed by eliminating high frequency (over 22,000 hz) on the..., dam I forget the term he said, and he will do the dummy load test, test the tubes, cleans the pots, etc.
All cost $40.

I'll probably meet him by this weekend.

 

[Beerdog80]

How much will I be looking for this?
Hopefully I can get references for this in my area.

Well, getting capacitors for that amp, depending on which brand you choose, should run 20-30 bucks or so plus whatever your tech charges for labor. Its not expensive at all.

----------------
Now playing: Allman Brothers Band - Good Clean Fun
via FoxyTunes

 

[LPV]

I just found an Amp Tech near Pape Ave & Danforth Ave.
When I explained about the RF thing, he said it can be fixed by eliminating high frequency (over 22,000 hz) on the..., dam I forget the term he said, and he will do the dummy load test, test the tubes, cleans the pots, etc.
All cost $40.

I'll probably meet him by this weekend.

I'll bet you will be amazed at what you have when he is done

Are you going to get the new logo ? They are 25 bucks I think.

and, umm... ?

 

[GibsonSlash]

I still haven't decided whether to take it or not.
I barely know the guy, just got his number from some canadianguitar forum, and called him.
I have to leave the head at least a week.

How easy to install the logo? and where can you get one locally?
http://www.mylespaul.com/forums/401397-post110.html

I'll bet you will be amazed at what you have when he is done

Are you going to get the new logo ? They are 25 bucks I think.

and, umm... ?

 

[LPV]

I still haven't decided whether to take it or not.
I barely know the guy, just got his number from some canadianguitar forum, and called him.
I have to leave the head at least a week.


How easy to install the logo? and where can you get one locally?
http://www.mylespaul.com/forums/401397-post110.html

'70s MARSHALL VINTAGE AMP CABINET 9" LOGO OLD STOCK - eBay (item 160297810490 end time Nov-16-08 14:43:43 PST)

Locally, any marshall dealer usually.

Pops in in seconds. I did it to my old amp.

 

[kernelofwisdom]

I just found an Amp Tech near Pape Ave & Danforth Ave.
When I explained about the RF thing, he said it can be fixed by eliminating high frequency (over 22,000 hz) on the..., dam I forget the term he said, and he will do the dummy load test, test the tubes, cleans the pots, etc.
All cost $40.

I'll probably meet him by this weekend.

that's a reasonable cost to check it out for sure. sucks to leave it of course, but what can you do. there's something gnarly going on for you to get that hum just off the MV.

 

[GibsonSlash]

I remember Chupy mentioned this:

Between my 79 and that 81 that you posted, (if not modded) none.
I've also added a bit of filtering. These things are notorious for picking up RF.

I wonder what kind of filtering did he add?