After a few google searches, it appears that these CV133 tubes I have are
Marconi Osram tubes...I did search a few years back with no luck finding
identically labelled tubes with no luck at that time.
73...Jordan VE6ZT
----- Original Message -----
From: "Jordan Arndt" <[email protected]>
To: "Jacques Fortin" <[email protected]>
Cc: <[email protected]>
Sent: Monday, July 01, 2024 5:57 AM
Subject: Re: [R-390] R-390A 6C4 Mixers
Hi Jacques...
I'm not sure if these are Mullard tubes or not...There are no manufacturer
identified on the tube or the box. Here are 2 pictures I just took. As you
can see, there is a pin protector/straightener included, but it is not the
same as the ones used by Mullard.
Apparently, the plate structure has been altered to provide better
cooling.
FWIW, the plates are black and 17mm long...
73...Jordan VE6ZT
----- Original Message -----
From: "Jacques Fortin" <[email protected]>
To: "'Jordan Arndt'" <[email protected]>
Cc: <[email protected]>
Sent: Sunday, June 30, 2024 9:04 PM
Subject: RE: [R-390] R-390A 6C4 Mixers
HI Jordan,
I hesitated to mention the Mullards M8080 / CV4058 because I never tried
any
in my R-390As.
But these box-shaped anode 6C4 / 6100 equivalents are the best-sounding
version of the 6C4 that are used in many hi-end tube preamplifiers.
A CV133 can be any variant of the 6C4 because they can came from any
manufacturer, but not the M8080.
What about the ones you have ??
73, Jacques, VE2JFE in Montreal
--------------------------------------------------------------------------------
______________________________________________________________
R-390 mailing list
Home: http://mailman.qth.net/mailman/listinfo/r-390
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
______________________________________________________________
R-390 mailing list
Home: http://mailman.qth.net/mailman/listinfo/r-390
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
