Tube Shield
Tube Shield
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 RARE TO FIND BRAND NEW NEVER USED TYPE 57 57AS RAYTHEON TUBE METAL SHIELD NIB  US $9.99
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 Harmon Kardon Vacuum Tube Integrated Amplifier Receiver for rebuild or parts US $99.00
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![Western Electric 2C51 396A Dual Triode 12] Tested on Curve Tracer](http://www.bakmytunes.com/images/e/230791932679_0.jpg) Western Electric 2C51 396A Dual Triode 12] Tested on Curve Tracer US $4.95
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 Set of 13 McIntosh tube shields US $20.00
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 7 Pieces Genuine CINCH 7 pin mini bakelite tube socket shield collar NOS US $20.00
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 5 Pieces CINCH style 7 pin mini micalex tube socket shield collar NOS US $15.00
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 5 Pieces CINCH 7 pin mini micalex tube socket shield collar TS102P01 NOS US $17.50
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 5 Pieces EBY 9 pin mini micalex tube socket saddle shield collar TSE9T101 NOS US $16.00
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 5 Pieces Cinch style 9 pin mini micalex tube socket with shield collar NOS US $15.00
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 5 Pieces CINCH 9 pin mini micalex tube socket shield collar TS103P01 NOS US $17.50
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 PREAMP TUBE SHIELD HOLDER COVER 12AX7 12AT7 12AU7 US $1.00
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 Lot of 3 Tube Amp Covers Shields for small tubes Lot 105 US $5.50
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 MULLARD 12AX7 TUBE LONG PLATE D GETTER TEST VERY GOOD D91 US $100.00 |
 Mullard ECC81 12AT7 ANOS US $25.00
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 2 MULLARD 12AU7 TUBES LONG PLATE D GETTER TEST VERY GOOD D92 US $22.00 |
 4PCS SIEMENS E88CC 6922 TUBES VALVE GRAY SHIELD US $149.99
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 PHILCO PREDICTA VINTAGE TELEVISION US $199.00
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 2x M Pair TESLA E88CC 6922 CCa Gold Pn NOS NIB 1977 Vintage lk Siemens US $45.99
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 Pair Sylvania 6V6GT Tubes Test NOS Black Plates RF Shield Chrome Dome US $59.99
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 Shure Transformers Pair mic preamp moving coil MC step up transformer SUT DIY US $40.00
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 2x Mullard 5654 Matched Pair Little Dot Amp 6J1 6AK5W US $36.00
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 Professional Audio Grade RCA shielding cap for Tube Amp US $5.99
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 New Aluminum Vacuum tube shield for preamp tubes valve US $1.75
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 NEW Reissue Mullard 12AX7 ECC83 pre amp tubes $1600 each Buy it Now US $16.00
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 7 pin ceramic TUBE SOCKETS 40mm Lot of 30 NEW US $26.00
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 Pair 2 RCA 6L6GC Black Plate Test Excellent US $35.00
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 MU METAL MAGNETIC STATIC GUITAR MIC PHONO LP MRI SHIELD PARAMAGNETIC HUM REMOVER US $18.99
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 RCA Electron Tubes 407A BRAND NEW IN ORIGINAL BOXES US $100.00
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 9 pin TUBE SOCKETS 40mm Lot of 8 NOS US $12.95
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 Aiwa Excelia XK 009 3 Heads DBX Stabilizer CD Direct Side Panels Very High End US $650.00
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 9 pin TUBE SOCKETS 60mm Lot of 8 NEW US $11.00
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 9 pin miniature B9A J Slot tube shields Lot of 5 12ax7 sheilds Preamp shields US $19.75
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 Lot of 3 Tube Amp Covers Shields for small tubes CINCH SOS 6 Lot 104 US $5.50
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 Reissue Mullard 12AX7 ECC83 balanced tubes $1900 ea US $19.00
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 5 Vintage Fitted Tube Shields 12ax7 Fisher Scott US $10.99
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 6Aluminum 9 Pin Tube Shield Cover for Fender AMP9GW US $9.99
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 100mA mA meter for BIAS 300B 2A3 6L6 EL34 6550 Tube Amp US $17.50
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 2 MULLARD SHIELD 50C5 HL92 NOS Vacuum Tubes AUDIO HAM RADIO AMPLIFIER US $19.99
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 7 pin ceramic TUBE SOCKETS 40mm Lot of 8 NEW US $9.95
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 Vintage 12AX7 Stereo Tube Shield w Spring 25 Available US $4.99
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 Aluminum 9 Pin J Slot Tube Shield For 12AX7 12AT7 Etc US $1.99
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 ELCO TUBE SHIELDS 12BH7 TALL TUBE TS103U03 Lot of 5 J SLOT US $12.99
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 Huge Vintage Radio Audio Tube Lot 400 2 RCA Cases GE Sylvania Tung Sol NICE US $219.95
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 9 pin TUBE SOCKETS 40mm Qty 8 NEW US $12.95
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 9 pin Tube Ceramic SOCKET with Shields Springs 70mm Lot of 8 NEW US $12.99
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 RCA 1850A Television Camera Tube Vacuum Tube US $299.00
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 Vintage Lot of 300 NOS Vacuum Radio TV Tubes GE RCA Tung Sol CASE US $9.95
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 9 Pin J Slot Tube Socket With Shield For Guitar Amps Fits 12AX7 Etc BARGAIN US $1.99
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 W Aluminium Tube Shield Cover Case Western Electric Amplifier 262B 310A 348A 6J7 US $49.99
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 2 SYLVANIA 6CG7 6FQ7 Tubes Valves USED US $19.99
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 2 RCA 6CG7 6FQ7 Tubes Valves USED US $19.99
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 2 TUNG SOL 6CG7 6FQ7 Tubes Valves USED US $19.99
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 2 RCA 6CG7 6FQ7 Tubes Valves Black Plates USED US $24.99
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 AMPEREX ECC88 BUGLE BOY NOS MATCHED PAIR 6DJ8 6922 RARE MONZA ITALY GA4 NATIONAL US $21.50
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 4 x Mullard Mitcham BVA EF92 6CQ6 tubes “Horseshoe” getter US $20.00
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 Buffer 6N3 Tube Preamp AMP Matisse Kit transformer WL US $45.99
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 WORLDS BEST DIAMOND TELEFUNKEN PCC88 for 6DJ8 ECC88 6922 MATCHED PAIR TOP mA US $298.80
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 excpair Valvo CCa tubes mint NOS NIB own boxes 2 pairs available 6922 E88CC US $369.00
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 NEW Black 9 pin preamp tube socket with shield base US $1.95
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 10pcs NOS VINTAGE 9 PIN TEFLON SHIELD TYPE TUBE SOCKETS US $29.95
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 9 pin Micalex tube socket with shield base 3 4 hole US $3.25
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 6CG7 lot of 8 tubes w shield gm US $4.50
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 MOVING COIL CARTRIDGE STEPUP PHONO TRANSFORMER FOR TUBE PREAMP US $149.99
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 2 Vintage Tube Shields for Tube Amps 12AX7 US $5.99
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 Copper 9 Pin J Slot Tube Shield For 12AX7 12AT7 Etc US $1.69
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 1 9 Pin Tube Shield Cover 12AX7 12AU7 6CU7 ECC829GR w US $2.45
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 Buffer 6N3 Tube Preamp AMP Matisse Kit with transformer US $53.99
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 Tonearm Cable Wire Ultimate Wholesale Length US $149.95
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 x30 9 pin TUBE SOCKETS 60mm NOS US $28.00
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 1 16 50 FT RF SHIELD TUBULAR COPPER WIRE BRAID STRAP TUBE AMP RECEIVER GUITAR US $18.99
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Mild Steel Tubes and Purging
Mild steel welds can be quite difficult to get right if you are not used to this kind of work. It can be one of the most difficult jobs to do when working with mild steel tubes. Hats off, if you can do it well, but it takes a real man to be able to do this job. You will need to wait for the mild steel tube to cool after interval passes, while making sure that you keep the tip extremely hot and shielded with argon. You also have to make sure that you snip the tip of the welding rod if it ever gets crapped up so as to keep your tungsten sharp as it should be.
Purging steel is a very tough thing to do. Mild steel tubes and all the other types of stainless steel products need to be purged with argon gas to prevent them from sugaring or granulation, which is the effect of severe oxidation.
Mild steel welds cannot be complete without an argon purge on the inside surface of common mild steel tube. And this process is done by wrapping aluminum duct tape around the ends of the mild steel tubes while argon gas is left to be trapped inside it.
To be able to determine whether the tube has been purged enough, you need to use an oxygen analyzer; and to make sure that you do a good purge, here are some tips that you can follow:
1. Check that there is no water left inside in mild steel tube. Even a single drop of water will cause damage on the purging process. This is due to the components of water which are hydrogen and oxygen. Wait until all the water will evaporate.
2. You can poke a small hole at the topmost part of the tube to allow the argon gas to flow continuously inside it. Argon should freely flow inside the tube to let all the air out of the tube, as argon is denser than air. Argon will also remove air out of the tube because it has the ability to displace it.
3. Use a diffuser and place it at both ends of your argon hose to ensure a higher flow rate of the gas. A homemade diffuser can be easily fabricated with using stainless steel wool, perforated stainless steel sheet and small piece of sheet metal.
If you are sure that a good purge was done, you can proceed with tacking. You can do this by getting the tape off to let the tack cool down, after which you should re tape it. The tacking should be done 180 degrees apart.
There are more tips that you can follow when welding stainless steel pipe.
1. Instead of using a 3/32 inch rod, you should use a 1/8 inch wire to do better welding.
2. Re-welding can be done on impenetrable areas.
3. Prefer to use stainless steel wire brushes and files which are for stainless steel alone.
4. To avoid overheating, use enough amperage.
About the Author
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