Introduce myself and vintage vacuum tube collection

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Dear All,

Introduce myself in this wonderful group after many years of reading I would like to show my vintage vacuum tubes collection

with the aim to show some hidden gems , rarities out of the same “club” of already posted and showed many time so far.

Hope to add value to the discussion, learn , share knowledge , experience in positive mood , feel free to build together

Marco

 

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Let’s start

Full wave power rectifier type 5Z3 Marconi Made in Italy with black carbon plate (rugged plates) , upper getter squared , black base

heater is 5 Volt & 3 Ampere

base is 4 pin (2 fat) UX base American
I found also an adapter to use it in place of 5U4G / U52 with very good results

Below pictures of tube itself with carton box , adapter (available online adapter at affordable price) and test results over my tube tester Funke W19S , this tube is very strong & balanced systems

hope you like it

 

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More pictures of 5Z3 Marconi black plates , details , different views of this tube also
With adapter if you may need to use it in place of 5U4G / U52 seat

this tube is in mint conditions , never used before and

 

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More pictures of 5Z3 Marconi black plates , details , different views of this tube also
With adapter if you may need to use it in place of 5U4G / U52 seat

this tube is in mint conditions , never used before and I keep in my collection more pieces

 

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Another Vintage Mint NOS Full wave rectifier , made by Fivre in Italy type 5Z3 , with hanging Filament, smooth plates, grey , , squared getter located at bottom , black base . Selected for Air Force , markings are A.M. with his original carton box

 

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This is a 5U4G made by Marconi Italy with double squared getter upper , very nice tube in mint conditions

 

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This is a WE56 Telefunken made in Italy (Telefunken Milan , with EOC label on glass) this is a full wave power rectifier tube with large mesh plates , hanging filament M shape , close in specs with the sought after G2504 / RGN2504, it draws a little less current than g2504 but for the rest is very close in specs, 4 volt heater. This tube WE56 has P8A base socket (eg same base of an AD1 Telefunken, not the pinout of course) but with an adapter (showed in pictures) you can use it in place of 5U4 / U52 , a video of the glow will follow with a separate post

 

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WE56 Telefunken mesh plate glowing , enjoy

 

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Tube type PT14 M Philips NOS NIB , made by Philips in Italy , special design telephone serie , so called also “postal tube” not commercial valve , made to last long also in difficult conditions, extended lifetime ~ 10.000 hours. This type PT14 M is equivalent of Ca Siemens (postal tube) most known . This is a direct heater triode DHT for last stage audio. Already well tested and employed into Lampizator DAC (with adapters of course) , enjoy

 

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Few more pictures and details of test data over my tube tester Funke W19s, tested strong tubes full performances

 

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Few more pictures of PT14 M stock
In a following post all technical data sheet if you may need them. Those tubes were not commercial ones so it can be difficult to get their proper values / technical data sheet , even if this tube is the equivalent type of the most well know Ca Siemens postal tube

 

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Technical data sheet of postal tubes made in Italy , for your cross reference , hard to find technical data sheets informations from old books
I will post the other tube types available here in my collection

 

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Technical data sheet postal tubes

 

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Technical data sheet postal tubes

 

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Technical data sheet postal tubes

 

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Technical data sheet postal tubes

 

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Technical data sheet postal tubes

 

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tube type PT8 Philips Italy , NOS NIB , direct heater triode close to 101F Western Electric ~ 4019A STC postal tubes mono plate , silver plate & hanging filament , O getter bottom , metal base . Long life tubes (technical data sheets visible in my previous post ) enjoy

 

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tube type PT9 Philips Italy , NOS NIB , direct heater triode close to ~ 4020A STC postal tubes mono plate , silver plate & hanging filament , O getter bottom , metal base . Heater voltage is 2 volt , looks identical to PT8 but heater voltage is half Long life tubes (technical data sheets visible in my previous post ) enjoy

 

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This is my pair of RGN2504 Telefunken Germany , big globe balloon , smooth plates (large plates) , hanging filament , super strong emission , full life , enjoy