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ECL85

Information - Help 
ID = 18599
       
Country:
Europe
Brand: Common type Europe tube/semicond.
Tube type:  Triode-Pentode   Power/Output 
Identical to ECL85 = 6Ф5П = 6GV8
Similar Tubes
Normally replaceable-slightly different:
  6TP11
Heater different:
  10GV8 ; 18GV8 ; 9GV8 ; LCL85 ; PCL85

Base Noval, 9 pin miniature (USA pico-9) B9A
Filament Vf 6.3 Volts / If 0.9 Ampere / Indirect / Specified voltage AC/DC
Tube prices 10 Tube prices (visible for members only)

ecl85.gif
ECL85: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †

no96_1.png ECL85: RTT 1964 (Franzis) 10. Auflage
Martin Renz

More ...

Just Qvigstad
ecl85_techdat01.png
ECL85: RCA Tube Manual
Peter Hoddow

More ...
Usage in Models 1= 1960?? ; 2= 1961 ; 1= 1962 ; 1= 1963? ; 9= 1963 ; 1= 1964? ; 11= 1964 ; 8= 1965?? ; 1= 1965? ; 9= 1965 ; 7= 1966?? ; 2= 1966? ; 3= 1966 ; 7= 1967?? ; 1= 1967? ; 4= 1967 ; 1= 1968?? ; 2= 1968? ; 8= 1968 ; 1= 1969?? ; 5= 1969 ; 2= 1970

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):87

Collection of

 
ecl_85.jpg

ECL85
 

Forum contributions about this tube
ECL85
Threads: 1 | Posts: 8
Hits: 3120     Replies: 7
ECL85 = ECL 805 ?
Matthieu Testa
09.Jul.20
  1

Hi,

 

Can anyone explain me if there's a difference between ECL805 and ECL85 ? They look so similar and internal values also. Am I right or wrong ?

Andreas Steinmetz
09.Jul.20
  2

ECL805:
Pamax= 8W (10,5W with fixed grid bias)

ECL85:
Pamax= 7W (9W with fixed grid bias)

PCL85/PCL805 have the same limits.

In some later documents the PCL85 is listetd with the same limits as PCL805. I am in doubt that that is really correct. But perhaps the later 85 types have got the construction elements of the 805 types, too.

The 805 types are redesigned 85 types, because the 85 types often failed, and because a stronger version became necessary with the start of colour tv in europe.

Matthieu Testa
10.Jul.20
  3

Hi,

many thanks for your answer. What would happen if I replace ecl85 with/by ecl805 ? Can it damage the device ?

Andreas Steinmetz
10.Jul.20
  4

If you replace an 85 type by an 805 type, then there will happen nothing. Due to both types have identical characteristics (except of Pamax), it will work properly. But you should be careful when replacing an 805 type by an 85 type: In most cases it will work, too, but the 85 type could fail earlier than usual.

Achim Dassow
11.Jul.20
  5

Dear Matthieu,

due to reliability Problems the PCL85 (Pa= 7W [1]) became the successor PCL805 (Pa= 8W [2]) where nothing else had been changed except the pentode power rating.
For the same reason the pentode part had been put into a single envelope, which was named PL805 then (with "E"-Heater also produced as EL805).
The following article from "Funkschau", 1967 Heft 1 page 16 is showing this.

[1] Siemens Röhren, Halbleiter, Bauelemente, Taschenbuch 1966/67

[2] Valvo Taschenbuch 72

Matthieu Testa
05.Apr.21
  6

Found the answer... ECL802 (9W) is quite similar to ECL805... and in no case similar to ECL82

Maarten Bakker
01.Mar.22
  7

The listing of later PCL85 with the same characteristics as the PCL805 is likely correct. The rumor is that the characteristics were improved before the new type number was introduced, but it is also plausible that the number PCL85 was used on some percentage of the later tubes to be able to sell them without having to explain that the PCL805 really is backwards compatible.

I once noted down some of the overlapping Philips factory codes, I think somewhere around VXC or VXD (which means the valve design was already revised more than a dozen times). Unfortunately, I didn't enter the notes in my later database so for confirmation I'll have to find some valves again.

I never saw enough ECL85/ECL805 to confirm any overlap there, though. Also, I don't know anything about valves from other manufacturers that didn't print revision codes on the valves.

Torbjörn Forsman
01.Mar.22
  8

Apparently, the triode is somehow improved in the ECL805/PCL805 too.

In the early 60's, the swedish manufacturer Luxor had lots of vertical sync problems in their tv's with PCL85 in the vertical deflection. They published several service informations about the problem, blaming it on the triode getting secondary emission from the control grid and drawing grid current when the valve became too hot. Among the suggested remedies were using specially selected PCL85 valves, connecting a 22 kohm resistor in series with the triode control grid (it was used in a blocking oscillator), and not the least, connecting an extra dropping resistor in the heater chain if the least overvoltage on the electrical mains was suspected. When the PCL805 appeared on the market, it seems to have solved all those problems.

 
ECL85
End of forum contributions about this tube

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