ecl11 - ecl86 replacement

emosms · 4th August 2011, 03:39 PM

Is it possible to replace the ECL11 tube (tetrode)
ECL 11, Tube ECL11; Röhre ECL 11 (ECL11)
with ECL86 (pentode)
ECL 86, Tube ECL86; Röhre ECL 86 (ECL86)
ecl86 is pointed as a successor of ecl11
Here is the schematics>
View image: condor 965wk schema
- I don't know what to do with the supressor grid, which is connected to catode inside the tube

the_manta · 4th August 2011, 04:13 PM

Hi !
Yes you can do that. Those adaptors were quite popular (in germany for sure) and they were available in shops. Look here, that's what you need: Inter ECL11 E / ECL 11 E Radio-Röhre, ECL86 + Adapter | eBay

Since the 965WK is a Superhet, the ECL11 is only used for low frequency amplification and can be substituted with the ECL86. You will even get more gain due to higher µ of the triode section. You don't have to worry about the supressor grid in the ECL86. It is connected to the cathode internally, that's where it should be connected.

There is a fabulous homepage where you can read more about using replacing old tubes (for radio use, nothing useful for audiophools here): Umsockeln_von_Roehren

Have fun with your radio, it's lovely one.

radiostar · 4th August 2011, 08:59 PM

Thanks for the link!!!

4th August 2011, 03:39 PM	#1
emosms diyAudio Member Join Date: Sep 2010	ecl11 - ecl86 replacement Is it possible to replace the ECL11 tube (tetrode) ECL 11, Tube ECL11; Röhre ECL 11 (ECL11) with ECL86 (pentode) ECL 86, Tube ECL86; Röhre ECL 86 (ECL86) ecl86 is pointed as a successor of ecl11 Here is the schematics> View image: condor 965wk schema - I don't know what to do with the supressor grid, which is connected to catode inside the tube

4th August 2011, 08:59 PM	#3
radiostar diyAudio Member Join Date: Apr 2009	Thanks for the link!!! __________________ tubes.rs facebook.com/tubes.rs

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4th August 2011, 04:13 PM	#2
the_manta diyAudio Member Join Date: Nov 2006 Location: Munich, Bavaria	Hi ! Yes you can do that. Those adaptors were quite popular (in germany for sure) and they were available in shops. Look here, that's what you need: Inter ECL11 E / ECL 11 E Radio-Röhre, ECL86 + Adapter \| eBay Since the 965WK is a Superhet, the ECL11 is only used for low frequency amplification and can be substituted with the ECL86. You will even get more gain due to higher µ of the triode section. You don't have to worry about the supressor grid in the ECL86. It is connected to the cathode internally, that's where it should be connected. There is a fabulous homepage where you can read more about using replacing old tubes (for radio use, nothing useful for audiophools here): Umsockeln_von_Roehren Have fun with your radio, it's lovely one.