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| PX4 Marconi with Single Chrome plate |
| This is a PX4 Marconi single plate with no fins attached hence making it more attractive. This Marconi has been tested and is in excellent working order. The whole around the plate has chrome finished as we said and no dark spots appear on the plate. Tested with AVO CT 160 at 38 mA and 70% emission. Tube stated as new. Price £ 200 |
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| A lovely PX4 long carbon plate. Such a rare example! |
| This PX4 is one of the kind! Showing superb construction and with a plate built to last forever it has in fact all data in working order and all you need from it is here. We have selected the best types of PX4 and this one seems to match our criteria of an execllent tubes as MINT. Testing on the AVO CT160 was impeccable: 44 mA and 78% Price £ 200 |
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| A PX4 marconi with finned plate and chrome finish |
| Another lovely gem! This PX4 has been just tested and gave superb results of current 40 mA and emission of 69-70%. By the way the PX4 has direct equivalent of PP3/250 Mazda or Mullard AC044 as well as CV type 1168. Working at 4 volts heater and 250 Anode it is a very simple and spontaneous way of checking a tube and no hassle. Price £ 225 |
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| A D026 Mullard boxed and MINT! |
| This is really what you can expect from a valve of this kind. A boxed Mullard D026 with CV type equivalent 1178 or 440XP. The D026 was tested at 400 Volts Anode and 4 Volts filament (similar to a 300B) and the stunning results we obtained persuaded us all! This is a very highly demanded tube among all vintage audiophiles for this there is Price On Application |
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| Showing you another photo of D026 |
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Please enjoy another view of D026 Mullard
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| A MINT PX4 Marconi purple logo with original box |
| The first of two PX4 Marconi with old purple logo here! This is for real! One of the finest examples of Marconi PX4 with no spots on glass and coming as clean as a pin! As you can see the valve has been tested before we decided to put on the web and with such a 47mA current and proportional emission of 89% have similar for £ 180 |
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| A MINT PX4 Marconi Purple logo with box |
| Another PX4 Marconi similar to the one above. Both valves were and are a matching pair. This valve like the one above has been tested with great results making them a matching pair. Current was 45mA and emssion 85%. Sad to say there is the getter missing inside but this is not a problem. SORRY SOLD but have more. Please email us |
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| Oram PX4 with ribbed plate and original box |
| One of sporadic examples of a valve which still comes in original box and in MINT condition and working order. For this reason we thought to select the best PX4 for you to buy on-line and be safe about what you will get. This is one of those tubes testing @ 44 mA and 90%. Great at all levels and you can be sure about it! Price £ 250 |
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| Another great PX4 with chrome plate |
| We also have this other PX4 familiarly known as ST shape or Fat Coke Glass. This tube has been tested and works fine. This one sold but we have more in stock, all tested and perfectly matched. This type of PX4 is one of the earliest Marconi tube design and is much closer to the above ones. Tested and for sale NOW for £ 250 |
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| An Osram (golden logo) PX4 with colour box |
| We fell in love with it at first sight! What a beautiful valve this one is and the ribbed-plate construction talks loud and clear. We have not seen such a MINT tube for a long time and the test was 100% convincing being this a MINT valve. Tested with AVO CT160 we got current of 45 mA and emission of 89%. Price £ 245 |
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| Matched Pair of PX25 Osram |
| Both PX25 balloon or globe shape if you like are dated back early 1930's! Still we cannot believe how both tubes test identical that is why we thought to match them together. Both valves have been tested at 4 volts filament and 400 Volts Anode and 42-44 mA, emission 93%. MINT. Each £ 250. Pair £ 750. |
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| BOXED Osram NT40 and a Marconi PX25 |
| We just give you further tips about the PX25. Equivalent for this tube is CV1040 or P27/500. Both tubes come in original huge box which measure about 25cm tall, that is amazing. Both boxes are intact and also showing those days' price! These two PX25 test as strong as ever with current of 45 mA and emission of 95%. Price boxed £ 750 the pair |
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| A PX4 GEC here with original box |
| No many PX4 left.. as they sell - as we always say - like hot cakes. This is another we have digged out and tested according to our opionion one of the strongest PX4 you can see here. The ribbed plate and the all-round construction and quality are more than con-vincing. The testing on our metere was clear 43 mA and 87% emission. Something to grab for £220 |
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| A PX4 made by Marconi early 40s's ribbed plate boxed |
| Take a look at this and the other valve at the bottom of this page. Both of them are sligthly taller than any other PX4 and that was Marconi's design to produce such a tube. Coming (still) with its original red box this gem is still intact and in full working order. Test report: 45 mA and 89% emission. All filaments and round the glass show no spots! £ 220 |
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| Another Marconi PX4 valve with brown base & boxed |
| What a lovely valve this one and, as stated, we have a matched pair here. This one in particular has dark plate and make the all of its construction very desirable. There are no other valves you can match or even compare to the long tall shape of this one! Tested with care we reported the following: Current was 45 mA and emission was 90%. Price £ 240 |
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