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Re: Try a type 80 globe rectifier in your super zen

Reply #99 - 06/04/19 at 20:00:52

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Recently my tube rolling took an interesting turn with unexpected results which has given me a new perspective. Both my Sophia tubes gave out one after a year and half and one after minutes at best. So I had to find something in my inventory as an interim solution. Of the type 80’s that I had, one type was left, AWV Type 80 (ST Bottle). Never really gave this tube a good try.

I popped this in my UFO25 and after a few hours things started to come alive so much so that I picked up a couple more made in the 40’s. For the price, a fraction of the Sophia, I felt that this was a really good backup. At the same time another tube caught my eye, AWV 5AS4G. I have been using The AWV 5AS4GB in my CSP3 and that, up till now, has become my go-to tube for the CSP3. So, at the price, I picked up a couple of those and boy oh boy am I glad I did.

With the AWV 5AS4G the tonality, transients and decay are shockingly good and yet to be equaled. The speed of the system is that of an electrostatic speaker based system. Not only do the speakers disappear, the whole system seems to vanish and what's left is this expansive sound stage filled with beautifully layered and completely captivating music. When listening to violin passages I am left with a lump in my throat, I kid you not.

As I thought about what was happening I realized that this tube, the AWV 5AS4G, was doing something that none of the others were able to do or at least had done. It was connecting all of the components and tubes into one harmonious unit bringing out the best of each. Recently I settled on a Raytheon A WM Getter in my ZR-2, I could really hear what it was contributing without drawing attention to itself. So too with the Type 80 in my UFO25, and all the other tubes and components. I look at this tube as I would view the role of a Conductor in an orchestra.

That is my new perspective of what a tube can do. So if I’m right, then I should be able to replace a tube and still end up with similarly engaging results even if the character of the presentation changes somewhat, somehow. That's what I did next.

Earlier, I tried a National /Matsushita 7DJ8 and really didn’t care for the results, so much so that I put it in my sell pile. Took it out of the sell pile and put it in the driver position of my CSP3 to see what would happen. The perspective of the presentation changed but, I really, really liked it. In the end I took the National 7DJ8’s out of the sell pile because I could easily put one of these in for an evening of a different perspective of engaging music. We don’t eat the same meal every night no matter how much we may like it.

In the end I’m back to the Type 80 in my UFO25 that cost less than a quarter of the Sophia and I doubt that I’ll buy another tube that is that much money. As Busterfree said... better spent on music.

Offered is a super nice early globe type RCA UX-280 Full-Wave Rectifier Tube. The tube is clean and in good condition. It tests good on the Jackson dynamic tester with strong readings on both diodes. The tube has black smooth plates and a big side foil getter with excellent silver flashing. The tube has hot-stamped base graphics. Used in many radios and amps with moderate to robust power supplies. Pick up the tube for your own gear. Mouse over the photo images to zoom in. NO RESERVE!! Thanks for looking.

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