MDB Ventures Industrial, Ham Radio Transmitter and Power Tubes

Save on NOS and Used Industrial, Ham Radio Transmitter and Power Tubes!

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Type: 1N1239 , 1N2637 , 3B28

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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, Nuvistor, subminiature, metal, power, transmitter tubes and many more. MDB Ventures Industrial, Ham Radio Transmitter and Power Tubes Quantity Available Tube Type Price Each Tube Brand Emission Strength Mutual Conductance Description Notes 1 1N2637 $30.00 unknown (usa) 140%/140% --- used (L) solid state 5R4 (ideal for Collins 516-FR) 2800V 1Amp 1 1N2637 $30.00 unknown 130% --- NOS (wb) solid state 866/3B28 1 1N2637 $30.00 unknown 130% --- NOS (wb) solid state 866/3B28 1 3B28 $7.50 RCA 120% --- NOS (OB) JAN - cat:401-359 1 3B28 $7.50 Tung-Sol 110% --- NOS (ob) box end flap missing - cat:401-388 1 3B28 $7.50 RCA 140% --- NOS (wb) JAN 1 3B28 $7.50 Chatham 120% --- NOS (OB) JAN 1 3B28 $7.50 Chatham 120% --- NOS (wb) JAN 1 3B28 $7.50 Chatham 130% --- NOS (wb) JAN 1 3B28 $7.50 Chatham 130% --- NOS (wb) JAN 1 3B28 $7.50 Chatham 115% --- NOS (OB) JAN 1 3B28 $7.50 United Electronics 120% --- NOS (wb) JAN 1 3B28 $7.50 Electronics Enterprises 120% --- NOS (wb) JAN 1 3B28 $7.50 Electronic Enterprises 120% --- NOS (OB) --- 1 3B28 $7.50 Electronic Enterprises 120% --- NOS (OB) JAN (cat:401-370) 1 3B28 $7.50 Cetron 120% --- NOS (OB) JAN 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, 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 Industrial, Ham Radio Transmitter and Power 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. Contact MDB Ventures sales@mdbventures.com Due to the highly volatile nature of the tube business, all Prices are subject to change without notice. Go back to the TOP Industrial, Ham Radio Transmitter and Power Vacuum Tube List Shipping and Handling Information MDB Ventures Home Don't forget to visit our Discount Bargain Packs and Bargain Bin for more savings! Email: MDB Ventures sales@mdbventures.com