Vintage AmplifierCollectors archive

Opta Loewe REN 904 Tubes, New Old Stock

First posted September 2013

Archived listing from the original vintage-amplifier.com. Prices, seller details and purchase links have been removed; this page is a reference record, and nothing here is for sale. About this archive.

Opta Lowe, REN904/WE27 Tubes
Opta Lowe, REN904/WE27 Tubes
From the original site

Quartet of NOS (New Old Stock) OPTA LOWE REN904 vintage electron tubes made in Germany. These quartet of OPTA LOWE REN904 are NEW and supplied with original box.

Added in 2026

About this model

Loewe was a Berlin radio maker founded in 1923 by the brothers Siegmund and David Loewe, and "Opta" appears in the names of many of its products. The REN 904 is an early German receiving-tube type from the first generation of mains-powered radios; the title also gives WE27, a designation we could not confirm. This listing offered a quartet of new old stock tubes in their original boxes, made in Germany.

Tubes like these interest builders of single-ended preamplifiers and collectors of early German radio rather than owners of 1950s hi-fi. Loewe moved its headquarters to Kronach in Bavaria in 1948.

Other European tubes in the archive include Philips Miniwatt types; all of them are listed on the tubes and testers page.

At a glance
MakerLoewe (Opta), Germany
TypeREN 904 receiving tube (listing)
QuantityFour, new old stock, boxed (listing)

Questions collectors ask

Who made Opta tubes?

Loewe, the German radio company founded in Berlin in 1923 by Siegmund and David Loewe, used the Opta name on many products.

What does NOS mean?

New old stock: a tube made decades ago and never used. It still needs testing before use.

Sources: Wikipedia: Loewe (electronics).

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