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Old 9th December 2010, 03:21 PM   #61
diyAudio Member
 
Join Date: Jan 2005
Location: a littlee town in western denmark
I can see that none off you have noise and hum--
i cant use mine 45tj witout mine irontube----way too much hum--
i have also some noise--must play musik to forget it---i use the --6db output--
is this what you call tube noise ?
i can hear the noise on 6 meter distance---
what about you--?
Bjarne
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Old 9th December 2010, 05:21 PM   #62
Previously: Kuei Yang Wang
 
Join Date: Nov 2002
Hi,

Quote:
Originally Posted by catastrofe View Post
Is it possible to use a Sophia 274 in place of the 5U4?
In principle - yes.

The Tram II does use more than 10uF input capacitance though and it draws around 70mA current.

Ciao T
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Old 9th December 2010, 05:29 PM   #63
diyAudio Member
 
Join Date: Oct 2008
Quote:
Originally Posted by ThorstenL View Post
Hi,



In principle - yes.

The Tram II does use more than 10uF input capacitance though and it draws around 70mA current.

Ciao T
Sounds like sticking with a 5U4 is the way to go. . .
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Old 10th December 2010, 09:15 AM   #64
Previously: Kuei Yang Wang
 
Join Date: Nov 2002
Hi,

Quote:
Originally Posted by beardman View Post
i use the --6db output
There is no "-6dB" Output on the Tram, only +6dB (the others are -3dB and -12dB).

If you use the +6dB Output you need to have very low gain amplifiers (for example common solid state power amplifiers with 26dB Gain) and low efficiency speakers.

The moving light dot on the volume control for slightly elevated (somewhat loud, but not extreme) should be at least at around 11 - 1 O'Clock but can be as high as 2 - 3 O'Clock.

In this case you have the right output for your overall system gain.

If your volume control setting is much lower than this for normal listening you are likely to have noise problems, so try using a lower output.

The lower outputs attenuate noise and signal equally, however you normally have plenty of volume control range in reserve to simply turn the signal back up, and the noise remains lowered.

Ciao T
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Old 10th December 2010, 12:41 PM   #65
diyAudio Member
 
Join Date: Jan 2005
Location: a littlee town in western denmark
Thanks Thorstenl
my fault---i use the --3db
can hear much lower noise with the --12db but it is not loud ennough--
so i think everything is alright---
the hum is still a mystery----can not use the pre without my iron tube for shield, and a wire to the input ground---(no hum then )
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Old 10th December 2010, 03:35 PM   #66
Previously: Kuei Yang Wang
 
Join Date: Nov 2002
Hi,

Quote:
Originally Posted by beardman View Post
the hum is still a mystery----can not use the pre without my iron tube for shield, and a wire to the input ground---(no hum then )
Certain Signal Tubes are better than others at pulling hum signals out of the air, some rectifiers are better putting it into the Air. Ironically the quietest Tubes seem to be Shugang 2A3B (Single Anode version).

Ciao T
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Old 14th December 2010, 11:07 AM   #67
Mihan is offline Mihan  New Zealand
diyAudio Member
 
Join Date: Aug 2008
I would be interested to know what power amps people are using with the Tram 2.
I note that Clive Meakins is using a pair of single ended LD 91's.

Would this linestage be overkill or indeed suitable with EL34/KT88 etc push pull power amps?

Are people mainly using analog or digital sources into the Tram?
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Old 14th December 2010, 11:50 AM   #68
diyAudio Member
 
Join Date: May 2003
Location: UK
Hi,

I tried Tram into what you might call a traditional solidstate system, the quality of the Tram shone through, I have no doubt that a tube PP would be a great match.

I use PC audio into a DAC as well as analogue. Again Tram delivers.
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Old 14th December 2010, 11:55 AM   #69
Desmo is offline Desmo  Denmark
diyAudio Member
 
Join Date: Jan 2007
Location: Aarhus
I have not recieved my Tram 2 yet (it's on it's way from HK), but I will use it in a system with both digital and analog front end, and with a Plinius SA-REF amp...
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Old 15th December 2010, 07:41 AM   #70
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Join Date: Jan 2005
Location: a littlee town in western denmark
I use my tram 2 with only digital--amp is a Gryphon Encore
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