2359glenn | studio
Dec 31, 2017 at 7:50 AM Post #17,566 of 39,986
It's time for another rectifier pic. :)



RFT (Rundfunk-und Fernmelde-Technik) manufactured this AZ12 in Röhrenwerk Mühlhausen, a state-owned factory in East Germany in 1952, during the Cold War. After the WWII, RFT took possession of a number of vacuum tube manufacturing facilities previously operated by Telefunken, Loewe Radio and others. This tube was manufactured with old Loewe Radio assembly line equipment installed in an old Lorenz factory building located at Mühlhausen. And thus, the construction strongly resembles a Loewe Radio AZ12 and the sound is also very similar.

Great info Ken.
This looks to be an AZ12 mesh plate, very nice.
 
Dec 31, 2017 at 8:09 AM Post #17,569 of 39,986
Happy New Year Everyone

Matt, drink a jingle juice for me !
 
Dec 31, 2017 at 8:43 AM Post #17,570 of 39,986
Great info Ken.
This looks to be an AZ12 mesh plate, very nice.

Yes, it is a mesh plate. And again, while it is not identical to the older Loewe Radio AZ12, manufactured about 10 years earlier on the same assembly line, it is very similar.

RFT on the left and Loewe Radio on the right.
2017-04-29 17.12.36.jpg
 
Dec 31, 2017 at 11:37 AM Post #17,572 of 39,986
Happy New Year!!!
 
Dec 31, 2017 at 1:15 PM Post #17,574 of 39,986
Of the ones that i have tried so far.
United Electric 596
GEC U18/20
Philco 80 Globe
Loewe Radio AZ12
Telefunken AZ12
GE 3DG4

The above are my favorites so far, everything else i have tried are a notch or two below any of these tubes.
The differences seem subtle, but are there the more you listen.

This amp has never lost its magnificent warmness, no matter what the rectifier tube.

Thanks! Looking forward to a GEL3N in 2018.
Have a couple of those, will look for some of the others.
 
Dec 31, 2017 at 6:14 PM Post #17,576 of 39,986
Happy new year from Dubai (just got back from LA.)
 
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Dec 31, 2017 at 6:54 PM Post #17,578 of 39,986
Happy New Year Everyone

Matt, drink a jingle juice for me !

I'm sure it wasn't jingle juice. That's so last Christmas. Jungle juice though is different. You will feel your head enlarged, so larger soundstage. Pin drop clarity, so you hear everything.

Anyway I did drink one for you.
 
Dec 31, 2017 at 9:25 PM Post #17,580 of 39,986
Thanks! Looking forward to a GEL3N in 2018.

I'm very keen too even though I think the below setup is a match made in heaven. I can see a GEL3N in my tunnel vision for 2018. It will be a good complement to the OTL amp.

Fact 1:- Glenn OTL amp is 10kgs
Fact 2:- Sylvania 6sn7w metal base lives up to it reputation. X-ray laser clarity (think sweet not shrill), wide soundstage and great slam.
Fact 3:- I love Yggdrasil.
Fact 4:- I love HD800 - now. Eikon is even more enjoyable on this setup.
Fact 5:- Wish you were here. :gs1000smile:

20180101_111825.jpg
 

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