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 Feeding the TS 850
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dg7lan
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 Fri Oct 28 2005, 10:39AM
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posts 65
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Let me share my experience with you:
When I was starting playing audio, I didnīt see any reason for feeding the 850 from the DSP. It was Mike, WZ5Q, who told me that the internal amp of the 850 rolls of the lows etc. So I decided to give it a try.
Since Jensen transformers are not available in Germany (at least I didnīt find it anywhere) I decided to order a Neutrik NTL4. When it arrived, I wanted to do a sweep befor modding my DSP so I connected it to my PC and tried to sweep with the well known program. I was really confused when there was no output at the xformer.. After some measurements I found out that the xformer must be broken 
So what to do now? I was really excited to get the direct feed running now and couldnīt wait any longer. So I drilled in the XLR connector. I made the connection with a couple capacitor. When I turned the device back on, I was really surprised. The sound changed dramatically. Without EQing there was ways too much bass in the boomy area. As soon as lowered the bass I was really delighted: There was much more clarity in the high area. The output from the monitor came in so smooth, no crisping, what I used to have when feeding from the back of the 850. I sure sstill have to play with the couple cīs value an do measurements. Right now I think of leaving the DSP without xformer since it works well for me. Didnīt check all the bands but while testing on 10m, everything was clean as usual.
When I finished my experience, I will post what I have done here.
All you people out there with the DSP but WITHOUT direct feed: mod it or you wonīt sound good! 
... if in doubt, increase bandwidth ...
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dg7lan
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Sun Oct 30 2005, 09:01AM
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posts 65
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OMG, I reply to my own thread. In short, I hooked everything up again and must say: It still sounds great. Have RFI on 80m but thats got different reasons.
... if in doubt, increase bandwidth ...
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WZ5Q
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Mon Oct 31 2005, 12:36PM
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Registered Member #6
Joined: Wed Mar 30 2005, 03:52PM
posts 24
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Terriffic Andy!!!
I knew you'de be impressed. 
Now you can here your own resonance in the lows.....
Goto have that Voodooooo Resonance!!!!!
Mike
WZ5Q
from Deep Down in the Dark Dismall Swamps of the Calcaseau
http://www.wz5q.net
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dg7lan
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Mon Oct 31 2005, 04:10PM
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posts 65
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Thanx so much Mike for pointing me there 
Hopefully my Starquad will arive tomorrow. Gotta build a bunch of patchcables now
... if in doubt, increase bandwidth ...
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dg7lan
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Wed Nov 09 2005, 02:56PM
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posts 65
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I got a new Neutrik NTL4 transformer now and it seems to work well.. My RFI on 80m is gone now, so it helped to fight against that. The sound is great. Seems like the Neutrik doesnīt roll off too much lows. It fits fine anywhere in the DSP100. I prefered to move it away from the powersupply.. Donīt know why, just like it better. I will do a description how I soldered things together if anyone wants to do it the same way. It will be found in the article-section later on. Also sweeps will follow but I donīt have a flat receiver at hand actually.
Take care,
Andy
[ 1_dsc_1658_.jpg ]
... if in doubt, increase bandwidth ...
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nicky
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Sat May 20 2006, 11:33PM
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Registered Member #29
Joined: Sun Apr 09 2006, 07:34PM
posts 5
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Hi Andy hope you'r ok,i have been looking for transformers and i cant find a Neutrik NTL4 there is a NTL1 ,i have been to Neutrik's web site http://www.neutrik.com/start.asp?country=uk&guest=welcome and can only find an NTM4 Studio transformer Mic: 1:4 , is this the one you have? the name may have changed .Nicky "English"
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nicky
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Fri May 26 2006, 08:10PM
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Registered Member #29
Joined: Sun Apr 09 2006, 07:34PM
posts 5
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Hi all I just got an e-mail from silicon solutions stream http://www.siliconsolutionstream.it/ they say that they can supply a jenson JT-10KB-D audio transformer ,the post and packing is a bit expensive EUR 25 and it will take 3-4 weeks so i may have to think a bit more, ok boys see ya later Nicky "English"
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