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Hi! I'm new member (Read 6338 times)
mike_gagne
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Re: Hi! I'm new member
Reply #15 - 02/19/11 at 07:53:32
 
ZYGI, mahalo for the shout out. The new hale is not pau yet-still finishing but am able to appear more often.
Azazello, I am impressed with your body of work! I hope you are making a living at it.

I will post pics soon.
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azazello
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Re: Hi! I'm new member
Reply #16 - 02/19/11 at 15:17:47
 
Thanks! I have a lot of tube ideas!
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Hi-End is back proportional to the number of composite parts!
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azazello
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Re: Hi! I'm new member
Reply #17 - 03/04/11 at 21:09:48
 
My "pocket" SE with audiophile tubes 6Ф3П /ECL82/ with strong bass and clear sound.
https://picasaweb.google.com/azazello52/Amplifiers#5580315473544989442
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azazello
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Re: Hi! I'm new member
Reply #18 - 03/10/11 at 17:51:26
 
https://picasaweb.google.com/azazello52/Amplifiers#5582500460015416338
My listening room. Hornes with Fostex FE 206E
Fro left to right on the shelf:
SE 6Ф3П, SE 2A3 RCA, OTL 6AS7, EL11 Telefunken, PP 6П3С - variant Leibowitz.
On the floor: PP 6005 - variant Leibowitz, SE 300B JJ, SE 6С4С, SE EL11 Tungsram.
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« Last Edit: 03/10/11 at 17:52:27 by azazello »  

Hi-End is back proportional to the number of composite parts!
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azazello
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Re: Hi! I'm new member
Reply #19 - 04/01/11 at 17:48:01
 
I changed electr. chock to iron, because I founded that el. chock doesn't avoid big moment energy cross to the amplifier.
It was second try and I decided never use el. chock!
I increased every plate current to 90 ma /more current - big sound!/, and I changed interstage caps to russian ФТ-3 - 0,47 uF /I tried Auricap, Dayton, K73-16/ and result is very, very fascinate and amazing! ФТ-3 is my favorite, I used it in my SE 2A3 RCA!
Uplate = 352 v, fixed bias -65v. For prestage 6E5P - U plate = 190 v, Iplate = 25 ma, Rplate = 7 kohm, R cathode = 100 ohms. U cathode = 2,5 v.. Cathode shunt ELNA Cerafine - 1000 uF /only 8 passive elements per channel!/.

https://picasaweb.google.com/azazello52/Amplifiers#5556534514050970514
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azazello
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Re: Hi! I'm new member
Reply #20 - 04/11/11 at 18:33:40
 
https://picasaweb.google.com/azazello52/Amplifiers#5594368832947255474
Mi finished project SE exotic tubes 4P1L & PCC88 Siemens,.....U plate-cathode PCC88 = 130v, Ia = 5,4 ma, Cathode shunt "Panasonic" with very clear sounding. Interstage caps K40-Y9 or ФТ-3, I will listening some days and will decide. Output tranies -
big excellence Hammonds 125FSE. Uplate-cathode 4P1L = 152 v, Ia=50 ma, fixed bias - 6,5 v.
Output power is only 1.5 Watts  per channel /triode mode/, but sounding is like 2A3.
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« Last Edit: 04/11/11 at 18:39:27 by azazello »  

Hi-End is back proportional to the number of composite parts!
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azazello
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Re: Hi! I'm new member
Reply #21 - 04/21/11 at 13:22:57
 
Yesterday I decided to throw away interstage caps that I tried /ФТ-3, K40-Y9, Auricap, Mallory..../
and I put interstage transformer Hammond 124B, small, but very suitable for small currents /5-6 ma/ and for tubes with low Ra /PCC88, 6N1P, 6N23P, E80CC...../ Transformer's  primary Ra = 10 kohm.
I used one section of secondary coil. The sound is  a level high and better, very clear, detail, with strong bass. I was very surprised!!
I'd like advise You try it! /Don't forget connect 10-15 kohm, the same, like Ra, short to one section of secondary coil, or 20-25 kohm, if You use full secondary coil to doubling the signal for driving output tube, if it needs, and don't see it's parameter 150-15000 Hz,  I heard very good last string of acoustic bass, and I measured linearity between 35-18000 Hz!/.
BTW....I didn't find EDCORS's interstage transformers in their prod. list...
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azazello
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Re: Hi! I'm new member
Reply #22 - 04/22/11 at 12:12:13
 
I tried different shunt resistors for half of secondary coil:
1. If use 15-20 kohm linearity of LF starts from 70-60 Hz.
2. If use 12-13 kohm _____________________ 50-60 Hz.
3. If use 10 kohm _____________________ 35-40 Hz.
Linearity of HF is more 18-20 kHz.
Now I use 10 kohm and sound is unbelievable bright and clear!
Now they cost in http://www.tubesandmore.com/ -Hammond interstage tr. 36 $, but I founded in the same price list, IMO, maybe the same /P-T 156/ for 17 $!
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azazello
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Re: Hi! I'm new member
Reply #23 - 09/14/11 at 18:24:35
 
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