radiomuseum.org

DK96

Information - Aide 
ID = 450
       
Pays:
Europe
Fabricant: Common type Europe tube/semicond.
Type:  Pentagrid-Converter (Heptode)   Pentagrid (old)   Commande 
Identique à DK96 = X25 = 1C3 = 1AB6
Similaires
Remplaçants avec petites différences :
  1H35
Autre qualité (reste identique) :
  3288
Autre culot / chauffage :
  1А2П
Première série Aug.1953 Tube leaflet collection E.Erb Analysis by original leaflets [P8, Kat 441]
Première source
Jan.1954 : Funkschau 1954 Heft 1
Prédécesseurs DK192   DK92  

Culot Miniatur-7-Pin-Base B7G, USA 1940
Utilisé par Radio/TV-reception etc.
Chauffage Vf 1.4 Volt / If 0.025 Ampère / Direct / Battery =
Prix 7 Prix (visible pour membres seulement)
Tube Tester Data Avo CT160

dk96.png
DK96: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †

dk96.png DK96: Telefunken Röhrenhandbuch
Wolfgang Bauer

Plus d'infos ...

Just Qvigstad
dk96_data1_1.png
DK96: Funkschau Röhrendokumente
Anonyme 10 Collectionneur

Plus d'infos ...
Utilisé dans modèles 4= 1953?? ; 1= 1953? ; 9= 1953 ; 6= 1954?? ; 6= 1954? ; 48= 1954 ; 7= 1955?? ; 16= 1955? ; 71= 1955 ; 5= 1956?? ; 16= 1956? ; 116= 1956 ; 6= 1957?? ; 27= 1957? ; 96= 1957 ; 8= 1958?? ; 11= 1958? ; 78= 1958 ; 7= 1959? ; 27= 1959 ; 2= 1960?? ; 1= 1960? ; 3= 1960 ; 1= 1961? ; 4= 1961 ; 5= 9999

Modèles de Radiomuseum.org avec ce composant :581


Collection de

 
dk96_miniwatt.jpg

DK96
 

Contributions forum pour ce composant
DK96
Discussions: 1 | Publications: 4
Vus: 6478     Répondre: 3
DK96 (DK96) vs 1j24b vs 1j37b
Michael Watterson
27.Sep.11
  1

I wish to make LW/MW/SW and VHF superhet like the late 1950s German models which used DF97 in VHF models and typically DK96, DF96, DAF96 and DL96 on AM only sets but with the sub-miniature Russian Rod Pentodes.

Obviously:

DL96  -> 1j29b

DAF96 -> 1j24b + 1N60 (or can G1 be used as an "Anode" of a diode and G3 as control grid, pseudo triode + diode using one 1j24b?)

DF96 - > 1j24b

But a 1j30b isn't really at all like Heptode DK96. 2 x 1j24b is less filament current and one can be oscillator and the other mixer?)

Is a Triode connected 1j24b comparable to DF97 triode connected as it is in the VHF front end of Grundig  Concertboy 58?

I'm not going to go out an buy a Grundig Concertboy 59 though, recently one sold over 800€ on Ebay!

Any thoughts?

 

 

 

Michael Watterson
05.Oct.11
  2

It seems you can replace a DK91 and a range of other B7G 1.5V Petagrid converter/Heptodes with DK96, in fact I found an article on changing a radio from D*91 series to D*96 series to save LT power.

But in the Rod Pentode Family no direct replacement for the DK96. Of course the Russians, Czech-Slovaks and East Germans made direct or similar valves to DK91 and DK96 types.

Testing the 1j24b as a Mixer / Oscillator I found that obviously increasing the HT increased the L.O. signal, but in fact the mixer products slightly reduced. The best ratio of modulation signal to L.O. signal was at the 12V to 18V range. G3 modulation with audio worked well. I need to try RF now.

The other probably better solution is ring diode mixer and tube L.O. However that's better at HF to UHF and easier at 30Mhz to 1000MHz than 100kHz to 2MHz due to transformer size and design. Two transformers with one winding on each centre tapped needed.

The 1j37b seems to be used on its own as mixer driven by a 1j29b as an oscillator. That is about 115mA  vs 11mA to 14mA for a single 1j24b. DK96 is 25mA, DK91 is 50mA and some similar models are 30mA.

1j29b is about 2 x 27ma, 54mA total on its two filaments and the 1j37b is nearer 60mA on its single filament.

 

 

 

 

Michael Watterson
01.Nov.11
  3

Using a single Rod Pentode with normal Screen voltage but abnormally high DC series resistance to force low DC Anode voltage works quite well as a replacement of a Pentagrid Mixer/Oscillator of DK96 type.

See 1j24b plugged into a DK96 socket.

The g4 pin of DK95 is not connected. g1 and g2 of the Rod Pentode form the oscillator as on the DK96 and g3 of the rod Pentode is RF and AGC/AVC in. In "plug-in" to a DK91 (1R5?) or DK96 socket a series  resistor bypassed with capacitor between socket/plug  and rod pentode anode forces the Anode voltage below 7V. The output impedance though is low. 

If used in a series heater chain a parallel resistor on the Rod Pentode Filament may be needed depending on which Rod Pentode replaces the DK96.

 

Michael Watterson
01.Nov.11
  4

Plug adaptor

Wiring a 1j24b onto a B7G plug to using in a Radio designed for DK96 with no modifications at all.

Two views of 1j24b on DIY B7G plug

The plug was made of magarine tub lid, 0.9mm wire and glue gun. Commercially made "NOS" B7G plugs are widely available though.

Total cost of replacement under $2 / €1.50 including postage.

The replacement is a bit less sensitive but gives acceptable performance. No noticeable shift in tuning. No realignment needed.

Filament consumption about 12mA to 13mA at 1.5V LT
HT consumption about 800uA  at 94V HT

 
DK96
Fin des contributions forum pour ce composant

[rmxtube-fr, noindex]
  

Mentions légales Plus d'informations