In the early days of indirectly heated cathodes, the mesh plate was supposed to help with the escape of heat. I have seen these mesh 6EJ7's before but I don't really know the reason for their construction.
Dennis AE6C On Fri, May 28, 2010 at 6:32 AM, Garey Barrell <[email protected]> wrote: > Steve - > > I don't know what if anything the mesh plates do for operation of the tube. > I'd say stay with the major brands such as Sylvania, RCA, GE, Mullard, etc. > The lesser brands MAY or MAY NOT have been built by one of the majors, but > it's difficult or impossible to tell. Also, some tubes of any brand seem to > be noisier than others in the 3rd Mixer position. I sometimes have to > select from two or three to find a quiet one. The good news is, once you > find a good one, it will last for many years. > > 73, Garey - K4OAH > Glen Allen, VA > > Drake 2-B, 4-B, C-Line& TR-4/C Service Supplement CDs > <www.k4oah.com> > > > steve white wrote: > >> I have a R4C and am going to replace the 6EJ7's in it. In looking at the >> pictures of these tubes it seems that most of them you can see the meshed >> plate (that's what I think it is) through the glass and others the plate >> looks just like normal. Does it matter which style or type of 6EJ7 I put >> into the R4C?? >> >> Steve NU0P >> >> >> >> > > _______________________________________________ > Drakelist mailing list > [email protected] > http://mailman.zerobeat.net/mailman/listinfo/drakelist >
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