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In the Forum: Off Air Audio
In the Thread: Sansui TU-X1 Broadcast monitor.
Post Subject: Some special magic aura….Posted by Romy the Cat on: 12/17/2019
The quoted subject of this post describes the sound of this beast very well. Some commentary about your post.  
If you do have good stations in your region worth listening then you can do better than simple 167cm straight one. Better antenna, preferably polarized will get you better selectivity. You can try in room little directional antenna, they cost nothing and will help you to model the selectivity setting and you will be able to see if the station you care might be benefited. Belter selectivity would help you to deal with audible distortions in stereo mode. Also, try to get the signal/directions map in your location. There are some sites out there that can do it for you and it will help you to understand where the offending signals are coming from. 
 
If the antenna attenuator works for you then use it. Get better step attenuator, you can find them at eBay for virtually nothing. It is not the quality of attenuator that matters but an ability to get fixed and predictable amount attenuation that Radio Shake attenuators do not offered. You would know that a given station for a given weather condition and given time of the year would (leafs) need let say 5 clicks of attenuation. 
 
The grounding schematic is a complicated subject and it is hard to say anything over internet. You need to find in your very specific inhalation you own very specific grounding accommodation. 
 
Yes, some decorative bulbs do emit RF and it is well known problem. 
 
Regarding mode modes. Be very careful with it as we do not particularly know who this unit sound so humane. I did some modifications, like changing very shitty electrolytic coupling cap between the stages but then I undid the changes as I felt the sound got less interesting. It became more hi-fi but less compassionate. So, keep it as is. 
 
The biggest problem with this unit in my view is a presents of the station that worth to listening. 10 years ago I was in direct contact with broadcast engineers of my local station that did live BSO broadcast.  We all were trying to make sound better within the limit of cause as there are many obstacles that made it I hard to do or even impossible to be truly good. Frequently after the broadcast they asked me to share with them the recorded files and they would like to hear what sound the customers were getting.  Nowadays the culture of the station change very dramatically, my engineers are not there anymore and the sound I am getting from air is very despicable. So, the digital stream at 192Kbps I find to be more preferable and BSO does offer these broadcasts.  My local stations has some other interesting live broadcasts and sometime I can get them in 320Kbps. It is not that I am huge fun of digital streams but the FM in Boston is so despicable nowadays that I have no motivation to be bothered. Also, other station that had not live but very good programing is gone now (the main host got terminally sick and the programing went down). 
 
So, am not patrolling the Boston FM landscape anymore. Still, sometimes I do turn my tuner and listening news and I very much love the sound of this machine. Sometimes I am thinking to sell my tuner  as there is no use foe it anymore but something in me makes me do not do it….

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