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Don't see what you need? Contact us. We have many more tubes that are not yet listed. We also have new and good used tubes in most other numbers including preoctal, globe/balloon, octal, loctal, miniature, subminiature, metal, power, transmitter tubes and many more.

MDB Ventures Audio Tubes
Qty
Avail
Tube
Type
Price
Each
Tube
Brand
Emission
Strength
Mutual
Conduct

Desc

Notes
1 5W4GT $6.00 Tung-Sol 120% / 125% --- NOS (OB) US Army - sealed in box
1 5W4GT $6.00 National Union 120% / 120% --- NOS (OB) JAN
1 5W4 $5.00 Raytheon 130% / 130% --- NOS (OB) metal tube
1 5W4 $5.00 Hytron 120% / 120% --- NOS (OB) metal tube - torn box flap
1 5W4 $5.00 Hytron 125% / 125% --- NOS (OB) mettal tube
1 5W4 $5.00 Ken-Rad 120% / 120% --- NOS (OB) metal tube
1 5W4 $5.00 Sylvania 120% / 120% --- NOS (wb) metal tube - green lettering
1 5W4 $5.00 Sylvania 120% / 120% --- NOS (OB) sealed in box - metal tube
1 5W4 $5.00 Sylvania 130% / 130% --- NOS (OB) metal tube - green lettering
1 5W4GT $5.00 RCA 115% / 115% --- NOS (wb) silver lettering
1 5W4GT $5.00 RCA 115% / 115% --- NOS (wb) ---
1 5W4GT $5.00 RCA 110% / 110% --- NOS (OB) ---
1 5W4GT $5.00 Raytheon 120% / 120% --- NOS (OB) ---
1 5W4GT $5.00 Raytheon 120% / 125% --- NOS (OB) ---
1 5W4GT $5.00 Hytron 120% / 120% --- NOS (OB) worn box
1 5W4GT $5.00 GE 120% / 120% --- NOS (OB) white lettering
1 5W4GT $5.00 GE 120% / 120% --- NOS (OB) white lettering
1 5W4GT $5.00 National Union 110% / 110% --- NOS (OB) ---
1 5W4-GT $2.00 RCA 110% / 110% --- used (rb) ---
1 5W4-GT $2.00 Raytheon 100% / 110% --- used (rb) ---
1 5W4 $2.00 Raytheon 100% / 105% --- used (rb) metal tube
1 5W4 $2.00 RCA 100% / 100% --- used (rb) metal
1 5W4 $2.00 RCA Victor 100% / 100% --- used (L) metal
1 5W4 $2.00 RCA Victor 100% / 100% --- used (L) metal
1 5W4 $2.00 National Union 100% / 100% --- used (L) metal
1 5W4 $2.00 National Union 100% / 100% --- used (L) metal
1 5W4 $1.50 RCA 95% / 95% --- used (L) metal
1 5W4 $1.50 Raytheon 95% / 95% --- used (L) metal
1 5W4 $1.50 GE 95% / 95% --- used (L) metal
1 5W4 $1.50 RCA 100% / 90% --- used (rb) metal
1 5W4 $1.50 RCA 90% / 90% --- used (L) metal
1 5W4 $1.50 RCA 90% / 90% --- used (L) metal
1 5W4 $1.50 Tung-Sol 90% / 90% --- used (L) metal
1 5W4-GT $1.50 Ken-Rad 115% / 115% --- used (rb) JAN - loose base
1 5Y3GT $12.00 GE 110% / 110% --- NOS (OB) white lettering
1 5Y3GT $12.00 GE 130% / 130% --- NOS (wb) white lettering
1 5Y3GT $12.00 Sylvania 115% / 115% --- NOS (OB) yellow lettering
1 5Y3GT $12.00 Sylvania 115% / 115% --- NOS (wb) yellow lettering
1 5Y3GT $12.00 Sylvania 120% / 120% --- NOS (wb) red lettering
1 5Y3GT $12.00 Sylvania 120% / 120% --- NOS (wb) green lettering
1 5Y3GT $12.00 RCA 120% / 120% --- NOS (wb) silver lettering
1 5Y3GT $12.00 RCA 130% / 130% --- NOS (wb) silver lettering
1 5Y3GT* $12.00 RCA 110% / 110% --- NOS (OB) silver lettering - US Army
1 5Y3GT / VT-197A $9.00 Sylvania 110% / 110% --- used (L) JAN - white lettering
1 5Y3GT / VT-197A $9.00 Sylvania 110% / 120% --- used (L) JAN - white lettering
1 5Y3GT / VT-197A $9.00 Sylvania 115% / 110% --- used (L) JAN - white lettering
1 5Y3GT $6.00 RCA 115% / 110% --- used (rb) silver lettering - brown base
1 5Y3GT $6.00 GE 120% / 120% --- used (rb) red lettering
1 5Y3GT $6.00 GE 120% / 120% --- used (rb) red lettering
1 5Y3GT $6.00 GE 110% / 110% --- used (rb) white lettering
1 5Y3GT $6.00 GE 110% / 110% --- used (rb) red lettering - JAN
1 5Y3GT $6.00 Sylvania 110% / 110% --- used (rb) green lettering
1 5Y3GT $6.00 Magnavox 120% / 120% --- used (L) ---
1 5Y3GT $6.00 GE 120% / 120% --- used (L) white lettering
1 5Y3GT $6.00 GE 120% / 120% --- used (L) white lettering
1 5Y3GT $6.00 GE 120% / 120% --- used (L) white lettering
1 5Y3GT $6.00 GE 120% / 120% --- used (L) red lettering
1 5Y3GT $6.00 GE 110% / 110% --- used (L) white lettering
1 5Y3GT $6.00 GE 110% / 110% --- used (L) white lettering
1 5Y3GT $6.00 GE 110% / 110% --- used (L) white lettering
1 5Y3GT $6.00 GE 110% / 110% --- used (L) white lettering
1 5Y3GT $6.00 GE 110% / 110% --- used (L) white lettering
1 5Y3GT $6.00 GE 110% / 120% --- used (L) white lettering
1 5Y3GT $6.00 GE 120% / 110% --- used (L) white lettering
1 5Y3GT $6.00 GE 110% / 120% --- used (L) white lettering
1 5Y3GT $6.00 GE 115% / 110% --- used (L) white lettering
1 5Y3GT $6.00 GE 130% / 130% --- used (L) white lettering
1 5Y3GT $6.00 GE 130% / 130% --- used (L) white lettering
1 5Y3GT $6.00 GE 130% / 130% --- used (L) white lettering
1 5Y3GT $6.00 GE 125% / 130% --- used (L) white lettering
1 5Y3GT $6.00 Sylvania 115% / 115% --- used (L) yellow lettering
1 5Y3GT $6.00 Sylvania 120% / 120% --- used (L) yellow lettering
1 5Y3GT $6.00 Sylvania 115% / 115% --- used (L) yellow lettering
1 5Y3GT $6.00 Sylvania 110% / 110% --- used (L) yellow lettering
1 5Y3GT $6.00 Sylvania 120% / 120% --- used (L) yellow lettering
1 5Y3GT $6.00 Sylvania 110% / 120% --- used (L) yellow lettering
1 5Y3GT $6.00 Sylvania 120% / 120% --- used (L) green lettering
1 5Y3GT $6.00 Sylvania 120% / 110% --- used (L) green lettering
1 5Y3GT $6.00 Sylvania 115% / 120% --- used (L) green lettering
1 5Y3GT $6.00 Sylvania 120% / 110% --- used (L) green lettering
1 5Y3GT $6.00 Sylvania 120% / 120% --- used (L) green lettering
1 5Y3GT $6.00 Sylvania 110% / 115% --- used (L) green lettering
1 5Y3GT $6.00 RCA 110% / 110% --- used (L) silver lettering
1 5Y3GT $6.00 RCA 110% / 110% --- used (L) silver lettering
1 5Y3GT $6.00 RCA 110% / 110% --- used (L) silver lettering
1 5Y3GT $6.00 RCA 120% / 110% --- used (L) silver lettering
1 5Y3GT $6.00 RCA 110% / 120% --- used (L) silver lettering
1 5Y3GT $6.00 RCA 110% / 110% --- used (L) silver lettering
1 5Y3GT $6.00 RCA 110% / 110% --- used (L) red lettering
1 5Y3GT $6.00 RCA 120% / 115% --- used (L) red lettering
1 5Y3GT $6.00 RCA 115% / 120% --- used (L) red lettering
1 5Y3GT $6.00 RCA 125% / 125% --- used (L) red lettering
1 5Y3GT $6.00 Philco 120% / 130% --- used (L) ---
1 5Y3GT $6.00 GM / Delco 110% / 110% --- used (L) ---
1 5Y3GT $5.00 GE 105% / 115% --- used (L) white lettering
1 5Y3GT $5.00 GE 100% / 100% --- used (L) white lettering
1 5Y3GT $5.00 GE 100% / 100% --- used (L) white lettering
1 5Y3GT $5.00 GE 105% / 105% --- used (L) white lettering
1 5Y3GT $5.00 GE 105% / 105% --- used (L) white lettering
1 5Y3GT $5.00 GE 110% / 100% --- used (L) white lettering
1 5Y3GT $5.00 GE 100% / 105% --- used (L) white lettering
1 5Y3GT $5.00 GE 100% / 110% --- used (L) white lettering
1 5Y3GT $5.00 GE 105% / 110% --- used (L) white lettering
1 5Y3GT $5.00 RCA 100% / 100% --- used (L) silver lettering
1 5Y3GT $5.00 Sylvania 120% / 105% --- used (L) green lettering
1 5Y3GT $5.00 Sylvania 100% / 100% --- used (L) green lettering
1 5Y3GT $5.00 Sylvania 100% / 110% --- used (L) yellow lettering
1 5Y3GT $2.50 GE 90% / 100% --- used (L) white lettering
1 5Y3GT $2.50 Sylvania 90% / 95% --- used (L) yellow lettering
1 5Y3GT $2.50 RCA 90% / 90% --- used (L) silver lettering
1 5Y3GT $2.50 RCA 90% / 90% --- used (L) silver lettering
1 5Y3GT $2.50 RCA 95% / 95% --- used (L) silver lettering
1 5Y3GT $2.50 RCA 95% / 95% --- used (L) silver lettering
1 5Y3GT $2.50 RCA 95% / 90% --- used (L) silver lettering
1 5Y3GT $2.50 RCA 100% / 90% --- used (L) silver lettering
1 5Y3GT / VT-197A $4.00 Sylvania 120% / 110% --- used (L) JAN - white lettering - loose base
1 5Y3GT $3.00 Sylvania 120% / 120% --- used (L) green lettering - loose base
1 5Y3GT $3.00 Sylvania 120% / 120% --- used (L) green lettering - loose base
1 5Y3GT $3.00 GE 120% / 120% --- used (L) white lettering - broken locator pin
1 5Y3GT $3.00 GE 120% / 115% --- used (L) white lettering - broken locator pin
1 5Y3GT $3.00 RCA 120% / 120% --- used (L) red lettering - broken locator pin
1 5Y3GT $3.00 RCA 120% / 120% --- used (L) red lettering - loose base
1 5Y3GT $3.00 RCA 130% / 120% --- used (L) red lettering - loose base
1 5Y3GT $3.00 RCA 130% / 130% --- used (L) silver lettering - loose base
1 5Y3GT $3.00 RCA 110% / 120% --- used (L) silver lettering - loose base
1 5Y3GT $3.00 RCA 115% / 115% --- used (L) silver lettering - loose base
1 5Y3GT $3.00 RCA 115% / 115% --- used (L) silver lettering - loose base
1 5Y3GT $3.00 RCA 110% / 110% --- used (L) silver lettering - loose base
1 5Y3GT $3.00 Motorola 110% / 120% --- used (L) loose base
1 5Y3GT $2.00 RCA 120% / 120% --- used (L) silver lettering - loose base - broken locator pin
1 5Y3GT $2.00 RCA 100% / 95% --- used (L) loose base
1 5Y3GT $2.00 RCA 90% / 90% --- used (L) JAN - loose base
1 5Y3GT $2.00 RCA 95% / 95% --- used (L) loose base
1 5Y3GT $2.00 RCA 90% / 90% --- used (L) broken locator pin
1 5Y3GT $2.00 Sylvania 90% / 100% --- used (L) yellow lettering - cracked base
1 5Y4GT $8.00 RCA 120% / 120% --- NOS (OB) red lettering
1 5Y4GT $8.00 Tung-Sol 120% / 120% --- NOS (OB) ---
1 5Y4GT $7.50 Raytheon 120% / 120% --- NOS (OB) ---
1 5Y4GT $7.50 Raytheon 120% / 120% --- NOS (OB) torn box flap
1 5Y4GT $7.50 Raytheon 110% / 110% --- NOS (OB) torn box flap
1 5Y4GT $7.50 Westinghouse 120% / 120% --- NOS (OB) ---
1 5Y4GT $7.50 Westinghouse 120% / 120% --- NOS (OB) ---
1 5Y4GT $7.00 Westinghouse 120% / 120% --- NOS (OB) water damaged box
1 5Y4GT $4.00 Westinghouse 120% / 120% --- used (rb) ---
1 5Y4GT $4.00 Raytheon 115% / 120% --- used (rb) ---
1 5Y4GT $4.00 Raytheon 110% / 100% --- used (OB) ---
1 5Y4GT $4.00 GE 120% / 120% --- used (rb) ---
1 5Y4GT $4.00 Tung-Sol 120% / 120% --- used (rb) ---
1 5Z4 / VT-74 $7.50 Ken-Rad 110% / 110% NOS (OB) metal - JAN
1 5Z4 / VT-74 $7.50 Ken-Rad 110% / 110% NOS (OB) metal - JAN
1 5Z4 / VT-74 $7.50 Ken-Rad 110% / 110% NOS (OB) metal - JAN
1 5Z4 / VT-74 $7.50 Ken-Rad 110% / 110% NOS (OB) metal - JAN
1 5Z4 / VT-74 $7.50 Ken-Rad 110% / 110% NOS (OB) metal - JAN
1 5Z4 / VT-74 $7.50 Ken-Rad 110% / 110% NOS (OB) metal - JAN
1 5Z4 $6.00 RCA 110% / 110% NOS (OB) metal - silver lettering
1 5Z4 $6.00 RCA 110% / 110% NOS (OB) metal - silver lettering
1 5Z4 $6.00 RCA 110% / 110% NOS (OB) metal - silver lettering
1 5Z4 $6.00 RCA 110% / 110% NOS (OB) metal - silver lettering
1 5Z4 $6.00 RCA 110% / 110% NOS (OB) metal - JAN - silver lettering - damaged box
1 5Z4 $5.00 GE 110% / 110% NOS (OB) metal - sealed in box
1 5Z4 $5.00 GE 110% / 110% NOS (OB) metal - sealed in box
1 5Z4 $5.00 GE 110% / 110% NOS (OB) metal - white lettering
1 5Z4 $5.00 GE 110% / 110% NOS (wb) metal - white lettering
1 5Z4 $5.00 Sylvania 110% / 110% NOS (OB) metal - green letterig
1 5Z4 / VT-74 $3.00 Ken-Rad 110% / 110% used (rb) metal - JAN
1 5Z4 / VT-74 $3.00 Ken-Rad 120% / 115% used (ob) metal - JAN
1 5Z4 $2.00 RCA 110% / 110% used (rb) metal - silver lettering
1 5Z4 $2.00 RCA 110% / 110% used (rb) metal - JAN - silver lettering
1 5Z4 $2.00 RCA 110% / 110% used (OB) metal - silver lettering
1 5Z4 $2.00 RCA 110% / 110% used (OB) metal - silver lettering
1 5Z4 $2.00 RCA 110% / 110% used (OB) metal - silver lettering
1 5Z4 $2.00 RCA 110% / 110% used (rb) metal - silver lettering
1 5Z4 $2.00 National Union 110% / 110% used (rb) metal
1 5Z4 $2.00 Raytheon 110% / 110% used (OB) metal
1 5Z4 $2.00 Raytheon 110% / 110% used (rb) metal
1 5Z4 $2.00 GE 110% / 110% used (wb) metal (cat: 402-293)
1 5Z4 $2.00 Raytheon 110% / 110% used (L) metal
1 5Z4 $2.00 Raytheon 110% / 110% used (L) metal
1 5Z4 $2.00 Raytheon 110% / 110% used (L) metal
1 5Z4 $2.00 Raytheon 105% / 105% used (L) metal
1 5Z4 $2.00 Tung-Sol 105% / 110% used (L) metal
1 5Z4 $2.00 Wards Super Airline 110% / 110% used (L) metal
1 5Z4 $2.00 RCA 100% / 110% used (L) metal
1 5Z4 $2.00 RCA 105% / 105% used (L) metal
1 5Z4 $2.00 RCA 110% / 110% used (L) metal
1 5Z4 $2.00 RCA 110% / 110% used (L) metal
1 5Z4 $2.00 RCA 110% / 105% used (L) metal
1 5Z4 $2.00 RCA 120% / 120% used (L) metal
1 5Z4 $2.00 RCA 110% / 105% used (L) metal - JAN
1 5Z4 $2.00 RCA 100% / 100% used (L) metal
1 5Z4 $2.00 RCA 110% / 110% used (L) metal - JAN
1 5Z4 / VT-74 $2.00 RCA 110% / 110% used (L) metal - JAN
1 5Z4 / VT-74 $1.00 RCA 100% / 100% used (L) metal - minor rust on tube
1 5Z4 $1.00 RCA Victor 90% / 90% used (rb) metal
1 5Z4 / VT-74 $1.00 RCA 95% / 100% used (rb) metal - JAN
1 5Z4 / VT-74 $1.00 Ken-Rad 120% / 110% used (rb) metal - minor rust on tube

Notes:
(OB) = original box, (rb) = relabeled/replacement box, (wb) = white box, (L) = loose (no box), (pl) = paper label on tube (original or third party)
(H) = tested on Hickok 539A
(ST)=ST Style, (GT)=GT Style, (TT)=Tall Tubular, (M7)=7pin miniature, M9=9pin miniature, (SM)=subminiature, JAN = Military
Emission Strength = Percentage of emission measured on Eico 666 tube tester
(Emission Strength = 100% baseline reference, >80%:good, >60%:fair >40%=diode good).
Gm = Mutual conductance measured on Hickok 533 tube tester; Except (H)=tested on Hickok 539A
(Gm = measured/baseline, measured1:measured2/baseline, measured1:measured2/baseline1:baseline2).


How To Order:

Purchasing our audio tubes is easy.
Just send us an email indicating the tubes (including quantities) you want.
We will let you know the total price including shipping and handling.

Shipping and Handling Information

Contact MDB Ventures
sales@mdbventures.com
or
sales@fourwater.com

Due to the highly volatile nature of the tube business, all Prices are subject to change without notice.


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Contact MDB Ventures
sales@mdbventures.com
or
sales@fourwater.com