Middle Class Receivers at War Time (1938-45)


In the low field intensity area, regenerative straight set was not useful.
At such area, 4 or 5 tubes TRF set with RF amplifier was used.
The prevailed standardized TRF set was 4tubes that’s line up was 58-57-47B-12F.
Speaker was magnetic or small electro-dynamic type.
Other standardized TRF set was 5 tubes set with 2 stages triode amplifier.
This type equipped magnetic speaker.

We will introduce the Japanese middle class TRF Receiver at war time.
Lower class receiver is introduced at Low Cost Receiver at War Time

NOTICE:
Gothic is latest updates.
When not mentioned specially, all prices are original retail price.
Japanese terms or company names that is untranslatable are shown in Italics..


TRF (with Single RF amp.) Receiver

First-Class Products(*)

Caravan Model MD-8   4 tubes Dynamic speaker      Haraguchi Radio Co., Ltd.         1940? Official price JPY 73.70 

Nanaola Model N-14    4 tubes Dynamic speaker     Nanao Radio Co.,Ltd.            1940  JPY 100.00

National Nan-shin No.45  4 tubes                 Matsuahita Radio MFG. Co., Ltd.    1938? 
National Model R5-M    5 tubes                 Matsuahita Radio MFG. Co., Ltd.     1939? Official price JPY 51.00 
National Model R4-D    4 tubes Dynamic speaker      Matsuahita Radio MFG. Co., Ltd.     1940   Official price JPY 73.70 
National Model 5M-1    5 tubes                 Matsuahita Radio MFG. Co., Ltd.     1939 
National Model 5D-1    5 tubes Dynamic speaker      Matsuahita Radio MFG. Co., Ltd.     1940 

Aria Model J-55       5 tubes                 Mitaka Denki K.K.              1940?

Sharp Hyoujyun No.20   4 tubes                  Hayakawa Metal Works           1940? 
Sharp Model D-40      4 tubes                 Hayakawa Electric Industry Co., Ltd.   1942? Official price JPY 99.40

Columbia Model 41A-6  Semi-Transformer less 4 tubes    Nippon CHikuonki Shokai K.K.      1941 
Columbia Model CR-123  4 tubes                  Nippon CHikuonki Shokai K.K.      1943   Official price JPY 99.70 

Second-Class Products(*)

Lemond Radio Model unknown   4 tubes            Nobui & Co., Ltd.              1940?


TRF (with 2 stage RF amp.) Receiver

5 tubes Receiver with Wooden Chassis       Mfr. unknown      1943?  


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TRF (with Single RF amp.) Receiver (First-Class Products)


Caravan Model MD-8 4 tubes Dynamic speaker Haraguchi Radio Co., Ltd. Official price JPY 73.70

  

  The sticker of standardized set by Japan Radio Industry Guild

TUBES: 58-57-47B-12F  6.5" Electro-Dynamic speaker

4 tubes TRF with dynamic speaker set manufactured by Haraguchi Radio that is medium standing factory in Japan.
This is standardized set by Ministry of Commerce and Industry.
The sticker of standardized set by Radio Industry Guild placed on the rear cover.

This set keeps good condition. However, utput transformer was replaced.

(Collection No.11675)

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Nanaola Model N-14 4 tubes Dynamic speaker Nanao Radio Co.,Ltd. 1940 JPY 100.00

   

TUBES: 58-57-47B-12F  6.5" Electro-Dynamic speaker (FLOWERVOX D-65)

 Nanaola’s TRF receiver (1-V-1) with dynamic speaker.
This was high grade receiver at that time in Japan.

(Collection No.11341)

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National Nan-Shin No.45 4 tubes Matsuahita Radio MFG. Co., Ltd. 1938?

  

 

TUBES: 58-57-47B-12F Magnetic Speaker (paper frame)

 Matsushita’s low cost TRF receiver.
The name “Nan-Shin” mean extend into south area.
This was the policy of Japanese government.

Dial pointer is missing.

(Collection No.11223)

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National Model R5-M 5 tubes Matsuahita Radio MFG. Co., Ltd. 1939? Official price JPY 51.00

  

TUBES: 58-57-56-12A-12F Magnetic Speaker

Matsushita's 5 tube TRF (1-V-2) set. 2 triode used for AF amplifier.
The price of triode tube 56 and 12A was lower than pentode tube 47B.
This 5 tube set was low cost TRF receiver.
This is standardized set by Ministry of Commerce and Industry.

Cabinet is fear condition.

(Collection No.11250)

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National Model R4-D 4 tubes Dynamic speaker Matsuahita Radio MFG. Co., Ltd. 1940年 Official price JPY 73.70

  

TUBES: 58-57-47B-12F  5" Electro-Dynamic Speaker (National D-50)

 Matsushita's 4 tube TRF (1-V-1) set.
This is standardized set by Ministry of Commerce and Industry.
The size of cabinet and parts were similar to low grade regenerative set.

This set keeps original condition except missing knob.

(Collection No.11289)

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National Model 5M-1 5 tubes Matsuahita Radio MFG. Co., Ltd. 1939

  

TUBES: 58-57-26B-12A-12F , Magnetic Speaker

 Matsushita's 5 tube TRF (1-V-2) set. 2 triode used for AF amplifier.
The price of triode tube 26B and 12A was lower than pentode tube 47B.
This 5 tube set was low cost TRF receiver.
The right hand knob is antenna selector indicated "selectivity-standard-sensitivity.

(Collection No.11798)

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National Model 5D-1 5 tubes Dynamic speaker Matsuahita Radio MFG. Co., Ltd. 1940

  

  

TUBES: 58-57-56-12A-12F , 6.5" Electro Dynamic Speaker (National D-65)

Matsushita’s TRF receiver (1-V-2).
This was high grade receiver at that time in Japan.

This set found with original carton box.
However this is not dead stock.
It may be stored replaced old set with original box.

Appeared:MJ Magazine 02/1940

(Collection No.11363)

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Aria Model J-55 5 tubes Mitaka Denki K.K. 1940?

  

 

TUBES: 58-57-26B-12A-12F Magnetic Speaker

 Mitaka Electric's 5 tube TRF (1-V-2) set. 2 triode used for AF amplifier.
The price of triode tube 26B and 12A was lower than pentode tube 47B.
This 5 tube set was low cost TRF receiver.

(Collection No.11532)

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Sharp Hyoujyun No.20   Hayakawa Metal Works 1940?

  

TUBES: 58-57-47B-12F Magnetic Speaker

 Hayakawa’s typical TRF 4 tube receiver.

Speaker is missing. Cabinet is fear condition.
2 knobs from left is un-original.

(Collection No.11369)

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SHarp Model D-40型 4 tubes Hayakawa Electric Industry Co., Ltd. 1942? Official price JPY 99.40

  

TUBES: 58-57-47B-12F Electro-dynamic Speaker

 Hayakawa’s high gradel TRF 4 tube receiver.

Speaker is un-original. Cabinet is fear condition.

(Collection No.11480)

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Columbia Model 41A-6 Semi-transformer less 4 tubes Nippon CHikuonki Shokai K.K. 1941

    

TUBES: 12YR1-12YV1-12ZP1-24ZK2  5" Electro-Dynamic Speaker 

4 tube TRF set using the tubes for transformer-less set.
This set had small auto-transformer to increase B voltage.
Rectifier tube 24Z-K2 contained 2 unit of diode to used as multiplying rectifier
At this set, both units used as rectifier and field exciter.
Slide rule dial didn’t have reduction ratio. Direct coupling slide rule dial was not useful.

Knob is missed. We fixed replica of Columbia radio set for same era model.

(Collection No.11403)

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Columbia Model CR-123 4 tubes  Nippon CHikuonki Shokai K.K. 1943 Official price JPY 99.70

  

 

TUBES: 58-57-47B-12F Electro-dynamic Speaker

 Medium grade TRF receiver at war time. This was successor of model CR-122 (1940).
Slide rule dial didn’t have reduction ratio. Direct coupling slide rule dial was not useful.
The name plate was changed from aluminum into paper.

Speaker and knob (except center) is un-original.

(Collection No.11437)

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TRF (with Single RF amp.) Receiver (Second-Class Products)


Lemond Radio Model unknown 4 tubes Nobui & Co., Ltd. 1940?

  

  The sticker of standardized set by Japan Radio Industry Guild

TUBES: 58-57-47B-12F Magnetic Speaker (paper frame)

 4 tubes TRF receiver manufactured by small factory.
This set may be lowest TRF receiver at that time.
Old fashioned spider coil still used as antenna coil.

(Collection No.11309)

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TRF (with 2 stage RF amp.) Receiver


5 tubes Receiver with Wooden Chassis  Mfr. : unknown 1943?

  

TUBES: 58-57-57-3YP1-12F Magnetic Speaker (paper frame, Model Orion 78 Approved No.21179)

5 tubes TRF with 2 stage RF amp.
This set used wooden chassis to reduce the consumption of important metal resource.
Power transformer was poor quality. Many parts reused from old radio set.
I don’t found the evidence of manufacturer or date of manufacture.
It may be manufactured by amateur or small radio shop.

Knob is misssing

(Collection No.11298)

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