Valvo E 88 CC vs. ECC88

[Ajes01]

Hi.

I'm building a Gyraf Oultec tube Q.

Circuit is designed for a ECC88 tube.

I have com a across a Valvo E88CC tube, but not sure if this will work.

I have read that the difference is in the amp current for filament. both have a voltage of 6.3V

Some datasheets for E88CC states the current for filament is 300 mA wheres others says 365 mA.

Current for ECC88 is 365 mA.

- Best A

 

[waltube]

Same tube, same working point
If you have a dc regulator with LM317 you can fix it at nominal voltage without any problem for both id.

Walter

 

[jcalvarez]

There will be no issue if the filament power supply was designed for the ECC88 and is a voltage source of 6.3V +/- the usual 5%. The fact that the E88CC needs less current is not going to be an issue.

PS. Walter beat me to it 🙂

 

[waltube]

PS. Walter beat me to it 🙂

Pardon! 🙂

 

[Kay Pirinha]

In all known to me datasheets the E88CC heater current is 0.3 A, while the ECC88 draws 0.365 A.

Best regards!

 

[petertub]

JJ E88CC draws 0.365
E88CC JJ

Differences ECC88 vs E88CC is that E88CC allows a little more plate voltage. No problems using E88CC whenever a ECC88 is used.

 

[tubes4all]

Not forget that the e88cc is a SQ tube (special quality) and have a much longer life expectance.

 

[Kay Pirinha]

JJ E88CC draws 0.365
E88CC JJ

Differences ECC88 vs E88CC is that E88CC allows a little more plate voltage. No problems using E88CC whenever a ECC88 is used.

This tells me that JJ's E88CC is NOT a real E88CC, but a relabelled ECC88 instead. Which is no surprise when you look at their ECC803S, which has not too much in common with Telefunken's original. Their ECC83S is much closer to Telefunken, though.

Best regards!

 

[waltube]

Around 88, I am not so worry.
I test them on field and I use the good ones as 6H23 russian; also PCC88

🙂

Walter

 

[gyraf]

E88CC (and it's mil cousin 6922) are perfect for the GPultec amplifier. No modification needed..

(and I agree, the JJ version is a joke)

/Jakob E.

 

[Kay Pirinha]

Anyway, in my experience it doesen't matter too much which of these tubes are plugged into the socket, as far as they're not faulty. Even old, pulled PCC88's usually work with just 6.3 V at their heaters. And I agree upon the properties of - still relatively cheap - Russian 6P23-EV's.

Best regards!

 

[waltube]

I use normally Pcc88
And works fine
Are all Nos sometimes not expensive
I have around 50 Tungsram

 

[petertub]

E88CC (and it's mil cousin 6922) are perfect for the GPultec amplifier. No modification needed..

(and I agree, the JJ version is a joke)

/Jakob E.

The JJ E88CC works is it should and follows specifications. The only cheap with this is the price.

 

[Zung]

Not forget that the e88cc is a SQ tube (special quality) and have a much longer life expectance.

Correct.
According to the last known convention from Western Europe:

1. 1st letter: heater voltage: E=6.3V
2. 2nd & 3rd letter: number of electrode: C=triode, L=pentode
3. Following numbers: socket and model designation
4. For Special Quality, usually 10K hours: reverse 2 & 3 above, thus E88CC

After the Euro guys stopped making tubes, anyone is free to put any label on anything.