[R-390] A better rectifier for the R390 and the R390A

[Jim Whartenby]

Is there any consensus on which tubes in the R-390/URR fail the most?  I would think that tubes dissipated the most heat would be the least reliable.  So I would expect that the 26Z5 and the 6082 would be high on the list of tubes that often fail.  Comments?

Jim
Logic: Method used to arrive at the wrong conclusion, with confidence.  Murphy 

    On Wednesday, October 23, 2024 at 03:53:07 PM CDT, Jacques Fortin <jacques.f at videotron.ca> wrote:   

 Hi Perrier,
I did not find it myself: see the attached .pdf.
It works very well: my R-390 and one of my R-390A uses the 12BW4s.
You have to re-wire the sockets (and I even displaced the sockets below the mounting plate to provide more clearance as the 12BW4s are taller than the 26Z5s).
See the pictures: this is my "spare" PSU unit with the 12BW4s on board.

73, Jacques, VE2JFE in Montreal

-----Message d'origine-----
De : r-390-bounces at mailman.qth.net <r-390-bounces at mailman.qth.net> De la part de Perry Sandeen via R-390 Envoyé : 23 octobre 2024 15:56 À : r-390 at mailman <r-390 at mailman.qth.net> Objet : [R-390] A better rectifier for the R390 and the R390A



 Jacques Fortin wrote:
To replace the 26Z5 in the R-390 or R-390A, I prefer the 12BW4 solution.
At $3 each a unbeatable deal!
Great find  Jacques
Perrier




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