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Old 8th October 2012, 04:36 PM   #2121
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Location: London
Here are some shootouts I found online:

1 RGN2504 Telefunken mesh My favorite, best articulation, detailing and life.
2 RGNx004 Telefunken mesh 2004 and 4004, almost identical in sound, v. clear + clean.
3 AZ1 Telefunken mesh Really nice rectifier, clean, musical, liveliness.
4 UX-280 RCA/Cunningham Very musical, sweet, detailed in mids, highs pretty good.
5 83 RCA Very detailed high-mids/highs, good response.
6 80 (ST) RCA A bit more mellowed than the 80 globe, not as precise/accurate.
7 UX-281 RCA/Cunningham A bit like the 80, somewhat warmer, more force in lows.
8 866A RCA In big amps only. Very clear, sometimes a bit noisy.
9 5Y3GT RCA Very neutral, good for preamps etc, clean, a bit dry.
10 5U4G RCA Sound is dull, not as detailed, warm. The 300B of rectifiers.
GZ34/37 etc These types all sound very grainy and closed in, just not my cup of tea.

1. AZ-1 Vintage by "Valvo" ("brass" pins, ST shape balloon)), manufactured before WWII. Sounds so relaxing. Apsolutely the best. Like TFK AZ-1, but with soft highs. Speakers disappear "far away behind the back wall". Wonderful violins, mandolins and female vocals.
2. AZ-1 "Telefunken" balloon - beautiful. Excellent 3D, very flat, extra-speed bass. But with ng highs inferior to Valvo
3. EZ-80 "Miniwatt", D-getter best of EZ-80/81 types. Sounds clean, flat and forward.
4. GZ-34 "Siemens" Mazda-Belgium sounds very good, but too much brightnessssssssss,

1. AZ1 mesh
2. WE274B
3. 83 - tuneful and open. I would suggest staying away from the 83 tube. Mercury is not our friend

1. 5Y3 my personnel fav. Airy and deep bass. Fast, transparent. Bass is deep. Far better than GZ34. I run this tube a lot, hard and over spec. Go for brown base types. Or a british type where they are more transparent and lower base. Ken rad are really good and wet bass.
2. 80- Ancestor of the 5y3 , rolled of highs but super mids. I use type 80 with a 5y3 mix in my set up to balance things
3. 5R4. Super highs, fast,airy but thin sounding and light on body. Go for non-potato masher.

Last edited by andyjevans; 8th October 2012 at 04:42 PM.
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Old 8th October 2012, 04:49 PM   #2122
Magz is offline Magz  United States
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I wonder how the new Emission Labs 80 mesh plate sounds? NOT cheap, though at $240.00!

Anyone try it?
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Old 8th October 2012, 05:00 PM   #2123
palmas is offline palmas  Portugal
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Use maily 3B28, 866A, 83 and EZ81.
All sound good to me...
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Old 8th October 2012, 05:43 PM   #2124
euro21 is online now euro21  Hungary
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Quote:
Originally Posted by merlin el mago View Post
How much voltage draws the AZ1 or in other words: how many VAC have to be the mains tx?
Hi Felipe.

This is my #26 preamp raw HT supply.

242V RMS AC in, AZ1 mesh, CLCLC and two SSHV2 (2*20mA).
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File Type: jpg HT raw supply.jpg (30.7 KB, 437 views)
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Old 8th October 2012, 08:26 PM   #2125
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Quote:
Originally Posted by euro21 View Post
Hi Felipe.

This is my #26 preamp raw HT supply.

242V RMS AC in, AZ1 mesh, CLCLC and two SSHV2 (2*20mA).
Hello euro21,

Thanks to share your PSU schematic, I fixed my issue: I used 6VAC tx for AZ1 heaters with 1R in series to lower to 4VAC, I measured 4,90VAC in AZ1 heaters instead 4VAC so I added 1R more in series to have 2R and now I have 4VAC at the AZ1 heaters

Cheers
Felipe
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Old 8th October 2012, 08:44 PM   #2126
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Quote:
Originally Posted by euro21 View Post
Hi Felipe.

This is my #26 preamp raw HT supply.

242V RMS AC in, AZ1 mesh, CLCLC and two SSHV2 (2*20mA).
If you ground C3 instead of C1 it will sound better. And as the result SS rectifier will "sound" less different from vacuum rectifier.
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Old 8th October 2012, 08:47 PM   #2127
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Join Date: Sep 2009
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Quote:
Originally Posted by andyjevans View Post
Here are some shootouts I found online:

1 RGN2504 Telefunken mesh My favorite, best articulation, detailing and life.
2 RGNx004 Telefunken mesh 2004 and 4004, almost identical in sound, v. clear + clean.
3 AZ1 Telefunken mesh Really nice rectifier, clean, musical, liveliness.
4 UX-280 RCA/Cunningham Very musical, sweet, detailed in mids, highs pretty good.
5 83 RCA Very detailed high-mids/highs, good response.
6 80 (ST) RCA A bit more mellowed than the 80 globe, not as precise/accurate.
7 UX-281 RCA/Cunningham A bit like the 80, somewhat warmer, more force in lows.
8 866A RCA In big amps only. Very clear, sometimes a bit noisy.
9 5Y3GT RCA Very neutral, good for preamps etc, clean, a bit dry.
10 5U4G RCA Sound is dull, not as detailed, warm. The 300B of rectifiers.
GZ34/37 etc These types all sound very grainy and closed in, just not my cup of tea.

1. AZ-1 Vintage by "Valvo" ("brass" pins, ST shape balloon)), manufactured before WWII. Sounds so relaxing. Apsolutely the best. Like TFK AZ-1, but with soft highs. Speakers disappear "far away behind the back wall". Wonderful violins, mandolins and female vocals.
2. AZ-1 "Telefunken" balloon - beautiful. Excellent 3D, very flat, extra-speed bass. But with ng highs inferior to Valvo
3. EZ-80 "Miniwatt", D-getter best of EZ-80/81 types. Sounds clean, flat and forward.
4. GZ-34 "Siemens" Mazda-Belgium sounds very good, but too much brightnessssssssss,

1. AZ1 mesh
2. WE274B
3. 83 - tuneful and open. I would suggest staying away from the 83 tube. Mercury is not our friend

1. 5Y3 my personnel fav. Airy and deep bass. Fast, transparent. Bass is deep. Far better than GZ34. I run this tube a lot, hard and over spec. Go for brown base types. Or a british type where they are more transparent and lower base. Ken rad are really good and wet bass.
2. 80- Ancestor of the 5y3 , rolled of highs but super mids. I use type 80 with a 5y3 mix in my set up to balance things
3. 5R4. Super highs, fast,airy but thin sounding and light on body. Go for non-potato masher.
Andy thank you to share with us

Cheers
Felipe
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Old 8th October 2012, 08:48 PM   #2128
euro21 is online now euro21  Hungary
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My measurements (7.25V AC -1R-heater-2R).

Telefunken AZ1 mesh:
1.) 1.13A 3.84V
2.) 1.08A 3.99V
3.) 1.13A 3.86V

Tungsram AZ1:
1.) 1.00A 4.20V
2.) 1.08A 4.00V
3.) 1.12A 3.93V
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Old 8th October 2012, 08:50 PM   #2129
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Mine Siemens AZ1 just 4V.
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Old 9th October 2012, 06:43 AM   #2130
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I'm building my #26 amps power supply around the Telefunken "big mesh" RGN 1064. Doing a true dual mono, so one for each channel. I think the RGN 1064 is basically an AZ1 with a different pin base.

JD
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