FS: Valvo E88CC pinched waist ...

[Rodeodave]

Hi,

I'd part with one or both of these pretties. The print is not so good anymore but you probably won't hear that. Both tubes have shiny gold pins. Unfortunately I can't test the tubes, because I neither have tube gear where they would fit nor do I have a tube tester (or access to one).

The tube with the date code 7L2delta7A has the nice D-shaped getter.
The other tube has the date code 7L2delta6I.

Look at the pictures for further info. If you want pictures of some detail simply ask.

I have paypal and a bank account in Austria (Europe). I'll ship worldwide (insured) and won't skimp out on the packaging.

I also have some CCa and 6201 for sale... (or trade for a tube tester )

I'm not quite sure what they're actually worth, given I can't test them, so make me a "reasonable" offer. Comments welcome.

[gaborbela]

Hello
What would be the price for 2 or 4 CCa Siemens tube ?
Please let me know .
It is hard to offer any amount because it is not tested .
Thank you
Greets
mathelaszlo2@yahoo.ca

[Rodeodave]

Thanks for your interest guys, but I decided to acquire a tube tester and check the tubes. Sorry for wasting your time (for now), I'll get back to you once I know more about them.

[woodyandchristy]

Hi, I would definitely be interested in the Valvo PW tubes. Let me know when you get them tested and we can discuss $. Happy listening, Woody

[Rodeodave]

Okay!

[skoros]

Originally Posted by Rodeodave

Hi,

I'd part with one or both of these pretties. The print is not so good anymore but you probably won't hear that. Both tubes have shiny gold pins. Unfortunately I can't test the tubes, because I neither have tube gear where they would fit nor do I have a tube tester (or access to one).

The tube with the date code 7L2delta7A has the nice D-shaped getter.
The other tube has the date code 7L2delta6I.

Look at the pictures for further info. If you want pictures of some detail simply ask.

I have paypal and a bank account in Austria (Europe). I'll ship worldwide (insured) and won't skimp out on the packaging.

I also have some CCa and 6201 for sale... (or trade for a tube tester )

I'm not quite sure what they're actually worth, given I can't test them, so make me a "reasonable" offer. Comments welcome.

[woodyandchristy]

Hi, I was wondering how you were comming with the tester concerning the Pinched Waist tubes ? Happy listening, Woody

[Rodeodave]

Hi, an Eico 666 is on it's way and as soon as I get it to work I'll check the tubes 'n report back.

[headrott]

I am still interested in the Siemens CCa tubes after you are done testing them. Thanks again.

Greg

[Rodeodave]

Hi,

I finally got the Eico 666 tube tester. I overhauled it and also calibrated it (which is quite easy with an Eico 666).
I tested the CCa tubes and they test very good (one was bad).
Here are the settings I used (from the Coletronics chart from 1978):

6,3 50 50 6662145111 2 2 6-7-(8) 6
6,3 50 50 4512166611 2 2 1-2-(3) 1

I modified the Eico 666 so that I can directly measure the plate current. So the first number of the tested values is the % of dynamic conductance and the second value is the AC current through the tube. The tube obviously only conducts at the positive half-cycle of the anode voltage, which means that there is a factor of about .6 to get the real current, but that's just scaling.

All tubes tested negative for leakage (>20M Ohm) and gas.
The gas test with the Eico 666 goes as follows: The tube is tested with 0V applied to the grid. While holding down the merit lever the grid is switched from 0V to NC. A gassy tube would show an increase of current, with a good tube the reading drops.

Now the tubes:

1) 116/45.4 - 120/47.8
2) 121/49.0 - 120/46.5
3) 112/43.0 - 115/45.4

Matching code, ring-getter