This auction is for a rare balloon audio tube type PX4 made by the MO-V Osram. Military version, good looking tube.This Osram PX4 comes with. chrome plate! This PX4 is in working order and has two filaments glowing out of four, please check pictures.However it has been tested at 65mA with mA/V of 3.6 grid -37, still a good tube. Immediate payment required for this item! This is due to time-wasters who refuse to pay. If payment is not received within 24 hours I will sell it to second highest bidder without any further warning! Thanks Happy biddingI ship worldwide.UK GBP 8; Europe GBP 16; Asia: Hong Kong Taiwan China South Korea Japan GBP 20 USA GBP 20

This auction is for a rare balloon audio tube type PX4 in such a lovely condition and made by Osram.This is the early type of a balloon tube , good looking tube.This PX4 made by Osram has been tested at 60mA with mA/V of 3 at grid -48 still a good tube Immediate payment required for this item! This is due to time-wasters who refuse to pay. If payment is not received within 24 hours I will sell it to second highest bidder without any further warning! Thanks Happy biddingI ship worldwide.UK GBP 8; Europe GBP 16; Asia: Hong Kong Taiwan China South Korea Japan GBP 20 USA GBP 20

One Mullard AC044 (PX4) valve; tested Used valve, but fully tested. Testresults:Va 150V Vg1 -25V Ia 1mA Vg1 -20V Ia 7mA Vg1 -15V Ia 29mA Vg1 -10V Ia 60mA Va 200V Vg1 -35V Ia 0.35mA Vg1 -30V Ia 5mA Vg1 -25V Ia 19mA Vg1 -20V Ia 44mA Vg1 -15V Ia 78mA Va 250V Vg1 -45V Ia 0.8mA Vg1 -40V Ia 4mA Vg1 -35V Ia 17mA Vg1 -30V Ia 40mA Vg1 -25V Ia 75mA Va 300V Vg1 -50V Ia 2mA Vg1 -45V Ia 10mA Vg1 -40V Ia 31mA Vg1 -35V Ia 10mA No garantees. Check out my other listing for a PX4 valve. Will be well packed for safe travel. Shippingquote of £18 is for the UK incl. trackingcode.Other countries please ask for a quote before bidding and wait with payment untill the correct invoice has been send.

One Mullard AC044 (PX4) valve; tested Used valve, but fully tested. Testresults:Va 150V Vg1 -25V Ia 1mA Vg1 -20V Ia 7mA Vg1 -15V Ia 29mA Vg1 -10V Ia 60mA Va 200V Vg1 -35V Ia 0.35mA Vg1 -30V Ia 5mA Vg1 -25V Ia 19mA Vg1 -20V Ia 44mA Vg1 -15V Ia 78mA Va 250V Vg1 -45V Ia 0.8mA Vg1 -40V Ia 4mA Vg1 -35V Ia 17mA Vg1 -30V Ia 40mA Vg1 -25V Ia 75mA Va 300V Vg1 -50V Ia 2mA Vg1 -45V Ia 10mA Vg1 -40V Ia 31mA Vg1 -35V Ia 10mA No garantees. Check out my other listing for a PX4 valve. Will be well packed for safe travel. Shippingquote of £18 is for the UK incl. trackingcode.Other countries please ask for a quote before bidding and wait with payment untill the correct invoice has been send.

Here we have a rare paior of Mullard AC044 early type with red paint.They both have same design and have both ribbed carbon plate. Equibvalwnt pf PX4 and PP3/2450This auction is for a rare balloon audio tube type NT40 PX25 made by the MO-V Osram. Military version, good looking tube.Both AC044 Mullard red have been tested at 50mA grid -34 5mA/V and 50mA grid - 32 with mA/V 2 ....good tubesHappy biddingI ship worldwide.UK GBP 8; Europe GBP 16; Asia: Hong Kong Taiwan China South Korea Japan GBP 20 USA GBP 20

This auction is for a rare balloon audio tube type PX4 made by the MO-V Osram. Military version, good looking tube.This Osram PX4 comes with. chrome plate! This PX4 is in working order and has two filaments glowing out of four, please check pictures.However it has been tested at 65mA with mA/V of 3.6 grid -37, still a good tube Happy biddingI ship worldwide.UK GBP 8; Europe GBP 16; Asia: Hong Kong Taiwan China South Korea Japan GBP 20 USA GBP 20

This auction is for a rare balloon audio tube type PX4 in such a lovely condition and made by Osram.This is the early type of a balloon tube , good looking tube.This PX4 made by Osram has been tested at 60mA with mA/V of 3 at grid -48 still a good tube Happy biddingI ship worldwide.UK GBP 8; Europe GBP 16; Asia: Hong Kong Taiwan China South Korea Japan GBP 20 USA GBP 20

One Mullard AC044 (PX4) valve; tested Used valve, but fully tested. Testresults:Va 150V Vg1 -25V Ia 1mA Vg1 -20V Ia 7mA Vg1 -15V Ia 29mA Vg1 -10V Ia 60mA Va 200V Vg1 -35V Ia 0.35mA Vg1 -30V Ia 5mA Vg1 -25V Ia 19mA Vg1 -20V Ia 44mA Vg1 -15V Ia 78mA Va 250V Vg1 -45V Ia 0.8mA Vg1 -40V Ia 4mA Vg1 -35V Ia 17mA Vg1 -30V Ia 40mA Vg1 -25V Ia 75mA Va 300V Vg1 -50V Ia 2mA Vg1 -45V Ia 10mA Vg1 -40V Ia 31mA Vg1 -35V Ia 10mA No garantees. Check out my other listing for a PX4 valve. Will be well packed for safe travel. Shippingquote of £18 is for the UK incl. trackingcode.Other countries please ask for a quote before bidding and wait with payment untill the correct invoice has been send.