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6M-E5

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ID = 25858
       
Country:
Worldwide
Brand:
Tube type:  INDICATOR, in general   Indication 
Identical to 6M-E5 = 6E5-M

Base Miniatur-7-Pin-Base B7G, USA 1940
Filament Vf 6.3 Volts / If 0.15 Ampere / Indirect / Specified voltage AND current AC/DC
Description Miniature, made by Toyo, Matsushita 1956-58, also by Daystrom. 
Information source

6me5_typical.gif
6M-E5: Heathkit GR-21 radio
Joe Sousa

6me5.png 6M-E5: Datenblatt
Wolfgang Bauer

More ...

Just Qvigstad
6m_e5_national_tube_book_1962_p1_data_pin.png
6M-E5: National Tube Book 1962
Adrian Riesen

Usage in Models 1= 1960?? ; 1= 1960? ; 3= 1962?? ; 2= 1962? ; 2= 1964

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):9

Collection of

 
6me5_edited.jpg

6M-E5
 

Forum contributions about this tube
6M-E5
Threads: 1 | Posts: 4
Hits: 3060     Replies: 3
6M-E5 vs. 6ME5
Joe Sousa
02.Aug.09
  1

Dear Radiophiles,

Is there any significance to the dash in the middle of a tube name? I happen to own two examples of the 6M-E5 eye tube. One is labeled 6M-E5, and the other 6ME5. The 6M-E5 came with my GR-21 Heathkig FM radio. The 6ME5 came with a Realistic Radio Shack open real recorder. This recorder is mission a small back cover that may have had a model number.

.

A related question is what is the meaning of "LOCKED OFF TUBE (CODE 9)" for the 6ME5?

Regards,

-Joe

 

Torbjörn Forsman
02.Aug.09
  2

Typically, japanese tubes that do not have an exact american counterpart, have type designations with a dash. For example, 6R-HH2 (a double triode for television tuners, similar but not identical to the american 6BQ7) or 12G-B3 (a television horizontal output tube, a variant of the PL36 / 25E5 with different heater data).

However, american type designations should never be written with a dash.

May I guess that the 6ME5 might be stamped/branded by a equipment manufacturer that maybe not was so stringent or simply not had a dash in the stamping character set.

Roy Johnson
02.Aug.09
  3

Hello Joe,

The simple answer is that there is almost always no difference. Often it is found that tubes are marked in slightly different ways.

For example we see SP4B written S.P.4B.   Sometimes a "/" is added in some names.    The early tubes tended to have the punctuation marks which were later dropped.

In a similar way we see 6ME5 and 6M-E5 on the tubes and also in the literature. Manufacturers even were not consistent in the naming of the same tube - the price list. box and tube can all be different.

To avoid confusion, and more importantly to make sure that all information goes to ONE place we "lock off" some tube names to force all data to the page with the selected name. 

For example,  we locked off PEN4V in favour of Pen4V  (and all PENxx types).   Both ways are seen, but all data should fall onto the one page!

Best regards,

Roy

Joe Sousa
03.Aug.09
  4

Hello Roy and Torbjörn,

Thanks for the clarification, in particular, for the code 9 designation. If memory serves me, "code 9" is also what hospitals in the USA speak over the PA system when some dies suddenly.

There is probably a vast universe of electronic legacy from Japan that has not be explored at RM. I know they made some very interesting and unusual tuning eyes, aside from this minuaturized version of a classic octal round eye. There were some Japanese square target types with the same end view as classic octal eye tube.

Regards,

-Joe

 
6M-E5
End of forum contributions about this tube

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