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Slovenská pošta
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Dear customer / Vážený zákazník,

Update / Aktualizácia 23.08.2020

From today we are starting to deliver our goods to the customers in New Zealand again! / Dnešným dňom začíname opäť dodávať náš tovar našim zákazníkom na Novom Zélande.

We are shipping to almost all of the countries we used to ship to. We still do not ship items to Australia ( waiting for updates from the Slovak post ). In case of any further questions, do not hesitate to contact us anytime:

Zasielame balíky takmer do všetkých krajín, do ktorých sme zvykli zasielať. Stále nezasielame balíky do Austrálie ( čakáme na novinky od Slovenskej pošty ). V prípade akýchkoľvek ďalších otázok nás neváhajte kedykoľvek kontaktovať:

Best regards / S pozdravom RETROSTORE.EU
double diode - pentode UBL21 - (NIB)

UBL21 is a double diode - output pentode. The sensibility of the pentode system is very high. It is suitable for usage in different types of amplifiers. Indirectly heated cathode is common for both of the systems. UBL 21 was also a part of many smaller radio receivers from Tesla factory ( 305U, 306U, 307U a 308U Talisman, T254, Rytmus, 504U-II Pionier, 401U Accord, 402U, 405U Standard a others). New old stock tubes, new in box. Tubes are packed in vintage Tesla boxes. Tested on BM215A. 
(we reserve the right to change the description and specifications without prior notice)