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Alternative application of SR HFT

Last night I had friends over listening to music and checking out the new SR Atmosphere mini. I had extra HFT's laying around and we were trying different placements and one that really stood out was an HFT placed on top of the 5Y3GT rectifier tubes in my PrimaLune prologue 8 CD player and on the 5AR4 rectifier in my EICO 2050 integrated amp. Just sitting on top of the tubes made quite a difference for the better with improved clarity and expanded soundstage.

I'm thinking a high temp adhesive to securely attach the HFT's to the tube would improve things even further but I'm hesitant to go that far and it's quite impressive with them just sitting on top as is. I'm going to try them on the KT88's in my MC275 next to see how that application works out.


If you use a tube component in your system I would highly recommend you give the HFT's a try and see what you think.

Cheers 

 
nmmusicman
andynotadam's avatar
andynotadam
169 posts
 
Interesting. I have other fish to fry right now, but I have had truly excellent results with the HFTs in my room and on my speakers among a number of other SR products. I will keep it in mind, as I have contemplated introducing damping to my EL-34s in the past....
agriculturist
177 posts
 
Someone (perhaps from SR, I think) did say to me at one point to try ECTs on the amp chassis near the base of tubes, but not on the base itself. They did not say anything about putting them on tubes themselves. I believe that HFTs are not non-conductive, while ECTs are non-conductive. So some care is probably appropriate.  I find that tube dampers such as Herbie's HAL-O III dampers do a very good job with tube vibrations and resonance.  I use 2 or even 3 of those per tube. I tried ECTs near the tubes, but have found them more effective around digital circuits.  Also quite good on cables and electronic circuits.
davidpritchard's avatar
davidpritchard
866 posts
 
nmmusicman:
Great discovery. I will try this today on my SET amp and OTL headphone amp. Loctite (Home Depot) makes a high temperature glue (GO2 GEL) that I used to attach 9 HFT's on the front windshield of the Honda MiniVan.

 I now have a realistic soundstage in front of me while driving. It is quite rewarding to be driving "towards" a piano playing Mozart on the way to work. The improved soundstage allows me to enjoy a lot of quiet acoustic music that in the past did not sound good in a car environment.

I do use Synergistic Research ECT's (Electronic Circuit Transducers) on my amp chassis. Good places to try are:
Near the driver tubes
Near the signal tubes
Near the on-off switch
Near the volume control

I did not have improvement with ECT:
Near the output tubes
Near the Transformers

David Pritchard

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