Vacuum Tube Radio Ver.2

Die Röhrenbezeichnungen bei diesem japanischen Radio-Baukasten führen zu Irritationen. Die 3 verwendeten Röhren 1K2, 1A2, 2P3  sind zwar von der Bezeichnung her angelegt doch gibt es eine Doppelung.

Die Röhren 1K2 = 1T4= DF91  und 2P3 = 3A4 = DL93 sind im RM angelegt und die Verknüpfungen stimmen.

Bei der 1A2 = 1R5 = DK91 ist als 1A2 ein amerikanischer Eisen-Wasserstoff-Widerstand angelegt. Es müsste also eine Umbenennung (Zusatz anhängen) einer der beiden Röhren erfolgen.

Ich bitte  die Röhrenadministratoren um eine Meinung dazu.

Wolfgang Eckardt

ich habe diese japanische 1A2 als 1A2_1R5 angelegt, so kann man auch sogleich ihren Äquivalenz- Typ erkennen.

M. f. G. J. R.

Gerade lese ich den Beitrag unseres Japanischen Sammlerfreundes, de uns hier mitteilte, dass das Modell die Röhren 1K2 (1T4 oder DF91) 1B2 (1S5 oder DAF91) und 2P2 (3S4 oder DL92) führen würde. Wir geben auf dem Modell 1K2 1A2_1R5 und 2P3 und das widerspiegelt den Schaltplan.

Wolfang Eckardt hat mit Recht darauf hingewiesen, dass man natürlich auch ähnliche Röhren verwenden kann - z.B. günstige Röhren aus China und darum der Vorschlag von unserem Mitglied aus Japan differiert.

Nur etwas war zu ändern: Vacuum Tube statt Vakuum Tube ...

Dear gentleman

I am an old radio boy living in Tokyo. Please call me Taizo.

In Japanese, “Gakken” is the language which omitted the meaning of “study research”.
Gakken is the company who sells books, magazine, the assembly kit, etc. various
for boys and girls for education
The head office is located in the town near-by in which I live.

This radio is the goods conceived in order to use the primitive radio-tubes(battery-operated)      in large quantities and was hit by chance in China
which is sold as one of the science kit series for not only boys and girls, for "grown-up”.

The vacuum tubes currently used are 1K2 (1T4/DF91), 1 B-2 (1S5/DAF91), and 2P2 (3S4/DL92).

About the loud-speaker, the volume is increased with the plastic horn (D150mm)
from mini size (D22mm) speaker.

The cases are made with all plastics.

Price is about 10000 Japanese Yen.

This radio is an object for the study of a principle, and does not become practical use.
Probably, it will be good for decoration of the room.

Many thanks!      Taizo

Attachments

• cover page (107 KB)
• schematic (147 KB)

Dear Taizo

We are very glad to see the first post from Japan!
Three members yet are listed from Japan - but none did anything yet for RMorg - but you.
This is most common also for other countries - never mind.

I know that Japan has a very long tradition for radios - what is commonly not known here in Europe - and I think also in the USA it is not known generally. Japan has been recognised as a "copier" at the beginning of transistor radios but Japan has made major inventions (like the special variable condenser) for such objects.

Therefore it would be grat if you could persuade your radio friends in your country to play an active role here in RMorg. Every day more than 100 000 pages are opened worldwide from RMorg. Therefore your work will really be seen.

If you run into problems for putting in new models or loading up pictures etc. please click the blue info buttons and if that does not help you please write by using the contact form for help. The contact form can be found on each page in the bottom link "Contact".

Because this is a very special piece I hope the admins don't mind if you put this up as a new model (for 1999 because this is "the last year" we accept at present). I think the schematic is also a nice example how to use the tubes DF91, DAF91 and DL92 in a straight forward, simple way for experiments.

I have just introduced "your" tubes as 1K2 1B-2 AND 2P2. Please write them the same way including capital letters. Thank you. You are welcome.

Cordially,
Ernest 

Change on 10 Nov 2007:
Contact form entered instead of link (SPAM ...)

http://www.youtube.com/watch?v=fmVC6HqEWYY