Pre-amp Tube Covers / Shields

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odgeuk
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Pre-amp Tube Covers / Shields

Post by odgeuk » Sun Feb 13, 2011 12:47 pm

Where do you get these from at a good price? Are they Peavey specific? Or a generic item?

Need four for a JSX

Classic30inCincy
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Re: Pre-amp Tube Covers / Shields

Post by Classic30inCincy » Sun Feb 13, 2011 2:34 pm

If amp came without covers.....

Doubt there are any available.

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odgeuk
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Re: Pre-amp Tube Covers / Shields

Post by odgeuk » Sun Feb 13, 2011 3:00 pm

No no, it did. They are missing on mine. Bought used.

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Re: Pre-amp Tube Covers / Shields

Post by tommer » Sun Feb 13, 2011 3:03 pm

tube covers require a tube socket that is actually made
to use a tube cover.

the socket has two little vertical ears on it usually
-or- it can have a sort of 'Bayonet' mounting just
above the tube socket that the Bayonet mounting tube
shield would get mated to.

Can you use a tube cover (obviously for shielding
purposes) with any tube socket ? SURE !
BUT !!!
You will need a wire soldered to the tube
shield that goes to GROUND on the chassis...
and a very short wire i might add
.
NOTE: Without the wire soldered to the tube shield
going to chassis ground... you would simply
have a covered tube... that would do NOTHING
for you electrically
. It would NOT shield.
That would be stupid. :mrgreen:
BLUES BLUES & MORE BLUES... 8)
I was brought up so po, we couldn't afford the O and R in poor...

tommer
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Re: Pre-amp Tube Covers / Shields

Post by tommer » Sun Feb 13, 2011 3:06 pm

odgeuk wrote:No no, it did. They are missing on mine. Bought used.
in a pinch, you could use aluminum foil...
however you must make a good connection
from the foil to Earth or Chassis Ground with
that Al foil somehow... but it would work.
Leave the top of the tube clear to vent a
little heat.
:mrgreen:
BLUES BLUES & MORE BLUES... 8)
I was brought up so po, we couldn't afford the O and R in poor...

Classic30inCincy
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Re: Pre-amp Tube Covers / Shields

Post by Classic30inCincy » Sun Feb 13, 2011 3:07 pm

I USA we buy parts from Peavey USA.

Check with Peavey UK :!: :idea:

PAF Classic Series Tube Kit.......Created By Classic30inCincy
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odgeuk
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Re: Pre-amp Tube Covers / Shields

Post by odgeuk » Sun Feb 13, 2011 3:15 pm

I'm expecting it to be a standard Peavey replacement part which screws in:

Image

Just wondered if I HAD to get it from Peavey Dealer, or if the shield is pretty standard fitment to lots of brands amps.

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Re: Pre-amp Tube Covers / Shields

Post by Tedzomplin » Sun Feb 13, 2011 3:36 pm

From that pic,looks like you'll need the bottom part of the tube sheild as well.Those are board mounted tube sockets.Looks like the VK same set-up.So Pv should have the 2 parts.The base part of the shield should screw onto the chasis,and the sheild will bayonet mount onto the base.Not the same type/height as for old style chasis mounted tube sockets.

tommer
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Re: Pre-amp Tube Covers / Shields

Post by tommer » Sun Feb 13, 2011 3:57 pm

obviously i am wasting my time here...

here we go with tube sockets again....

once didn't work, what makes you thing twice will ?
:lol:
BLUES BLUES & MORE BLUES... 8)
I was brought up so po, we couldn't afford the O and R in poor...

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Re: Pre-amp Tube Covers / Shields

Post by Tedzomplin » Sun Feb 13, 2011 4:39 pm

Ok,then Tommer...you could go somewhere else to waste your time ? :lol:
What didi u mean by that,gentle Sir ? :o

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Re: Pre-amp Tube Covers / Shields

Post by scootercaster » Sun Feb 13, 2011 4:56 pm

If your preamp tube sockets looked like this :

Image

Then the tube shield would actually "shield" in an electronic sense.

If they look like this:

Image

Then they are mounted to the PC board itself.

It IS still possible for the tube shields to "shield" to ground if the hole in the chassis is meant to hold the tube shield in place and lets the tube shield connect to ground.

Some amps need them to keep tubes solidly in their sockets and quiet microphonics.
More often, they work better without them at all.

If you need to know about your particular amp, call Peavey parts for an answer.
Therefore, all progress depends on the unreasonable man.
-George Bernard Shaw

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scootercaster
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Re: Pre-amp Tube Covers / Shields

Post by scootercaster » Sun Feb 13, 2011 4:59 pm

Upon closer inspection of your pic, it doesn't look like your amp ever had them at all.

I say, "Play Away!". 8)
Therefore, all progress depends on the unreasonable man.
-George Bernard Shaw

tommer
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Re: Pre-amp Tube Covers / Shields

Post by tommer » Sun Feb 13, 2011 5:54 pm

Tedzomplin wrote:Ok,then Tommer...you could go somewhere else to waste your time ? :lol:
What didi u mean by that,gentle Sir ? :o
Scootercaster hit the nail on the head
by using Pictures.
Pictures speak a thousand words.
Next time I use Pictures...

...gone for now then... Break Time gentle Sir
8)

ps - Sometimes the schematic diagrams show dotted lines
around a tube
... meaning: SHIELDED.
BLUES BLUES & MORE BLUES... 8)
I was brought up so po, we couldn't afford the O and R in poor...

odgeuk
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Re: Pre-amp Tube Covers / Shields

Post by odgeuk » Mon Feb 14, 2011 1:30 am

Interesting. I have two friends with JSX's from the same year and they have the covers. I will look at them next time I can. Wonder why mine doesn't have them.

2010
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Re: Pre-amp Tube Covers / Shields

Post by 2010 » Mon Feb 14, 2011 8:22 am

Previous owner took them off for one of three reason's.
#1 to look different.
#2 to do a mod to the powerboard.
#3 they tried to change tubes and thought that you take those off to do it.
+1 Cincy I usa to order parts or play

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