Hello all, here we have a single Marconi B309 double triode valve with the tall Halo getter configuration. British made and excellent quality. Etch code R1 ? quite hard to read. It passed all its tests and the gm is 6.4/7.1 mA/V Items will be very well packed for delivery. Thanks for looking. Past Times Radio

Marconi Radiotron 12SC7 = VT268, 1634, CV540 Double triode,.

The following item is up for SALE - 1 - Marconi 1G6GT/G Quad set Double Triode Vintage Vacuum Tubes LOT # 70 24pcs total

Hello all, here we have a single Marconi B309 double triode valve with the tall Halo getter configuration. British made and excellent quality. Etch code R1 ? quite hard to read. It passed all its tests and the gm is 6.4/7.1 mA/V Items will be very well packed for delivery. Thanks for looking. Past Times Radio

Hello all, here we have a single Marconi B309 double triode valve with the tall Halo getter configuration. British made and excellent quality. Etch code R1 ? quite hard to read. It passed all its tests and the gm is 6.4/7.1 mA/V Items will be very well packed for delivery. Thanks for looking. Past Times Radio

Marconi Vacuum Tube Valve. W149. Double diode triode. Loctal B8G base. Will be carefully protected and packed for delivery.

The following item is up for SALE - 1 - Marconi 1G6GT/G Quad set Double Triode Vintage Vacuum Tubes LOT # 70 24pcs total

Marconi Vacuum Tube Valve. W149. Double diode triode. Loctal B8G base. Will be carefully protected and packed for delivery.

1 Marconi DA30 triode tube Made in the U.K. and of vintage production. Excellent, NOS-testing tube. Strong Gm and Ip; meets new-spec. Free from gas or shorts. Listened in circuit- quiet with no noise or microphonics. Clean glass & pins. Hanging filaments. Bottom, cup-getters. Tight base w/ no cracks. Excellent gettering. No large chunks inside. Tested at real operating voltages on an Amplitrex AT1000 at two operating points. Tube operated 10 min ea. before tests to ensure stability. AT1000 test results: At 300v anode, -75v bias- Gm- 4250 µmohs, Ip= 81.6 mA. Spec from Marconi- 45 mA. At 500v anode, -150v bias- Gm- 3190 µmohs, Ip= 59.0 mA. Spec from Marconi- 30 mA. In conclusion- This tests as an excellent, NOS tube. An excellent addition to anyones collection. Money back guarantee you will not be disappointed. All items are 100% guaranteed to arrive as represented for 30 days upon arrival. We offer a full refund if you are not satisfied. Weve been selling vintage electronics since 1999 with perfect ebay feedback and many happy, satisfied customers. All items professionally packed to arrive safely with no extra handling costs. Our mission is to offer quality-tested tubes to make you happy with your purchase. Terms & Conditions: Payment must be received within 3 days of sale date. Items described to the best of my ability. Shipped by U.S. Priority Mail. If you have questions, please contact me BEFORE purchasing. Thank you!

MARCHED PAIR (2) 8417 SAME DATE CODE DOUBLE TOP DISC GETTER. MADE BY SYLVANIA GREY PLATE DOUBLE DISC TOP GETTER SAME DATE FULLY TESTED NOS All tubes are fully tested for leakage, shorts, gas, life, and mutual conductance. Then they are matched according to brand, properties within the date of production, and mutual conductance. Matches are based on mutual conductance. I use two different, calibrated Hickok 539CS and/or, a Weston model 981 type 3. If they pass the testing, they will be sold with test data for that tube. If the tubes arent matched within 6%, I will acknowledge that in the description. I also offer a money back guarantee. Buyer pays return shipping for local pickups, I advise you to bring the electronics that the tubes are going in, within reason. Guitar amps, small radios, etc. I will allow you to test them on site, but you will be responsible for any product damaged by a faulty electronic. Im an honest seller and I stand by my product. Feel free to message me with questions. GlassBatman81

MARC PATHFINDER DOUBLE CONVERSION RADIO NR-52F1. In decent clean condition seems to work on allbands the top switches sometimes pop off when you change band and only a couple and only occasionally they arnt broken bfo switch at first warblesbut kind of works tho its not very good good sound from it and very clean Im near an airport so it does pick up air traffic and the fm boost seems to work OK when first plugged in a very slight hum can be heard but not when the radio is on

Marconi Vacuum Tube Valve. W149. Double diode triode. Loctal B8G base. Will be carefully protected and packed for delivery.

Normal 0 false false false RU X-NONE X-NONE MicrosoftInternetExplorer4 British made Marconi Osram BL63 double triode. Double heater power compared to 6SN7, otherwise electrically compatible. Sounds absolutely fantastic. See my other listings for more quality vintage. Tracked shipping worldwide.

The following item is up for SALE - 1 - Marconi 1G6GT/G Quad set Double Triode Vintage Vacuum Tubes LOT # 70 24pcs total

Marconi Vacuum Tube Valve. W149. Double diode triode. Loctal B8G base. Will be carefully protected and packed for delivery.