DIY mains, oh dear :(

Richard, I wouldn't say that is true in 100% of cases 2 I know of, use a torrodial Transformer, and the Frame type is generaly regarded as inferior but are useful for small appications and size constraints, MAYBE a cost thing too with large torridal's, I has always replaced Frame mount types with torridals, when moddifying CDP's/DAC's Pre's (providing size isn't an issue), also maybe the way it radiates the magnetic flux lines
Torrodials are more efficent, frame trannys are of a lammimate multi core construction, and have a tendency to resonate (50HZ) with aging, where as torriodials don't being single core. hope that helps WM

 

hi wm , this is a quote from a website i read when i started to look into mains isolation .
and hence my perceptions .

i may be using the wrong name , when i say frame , but i had E-I transformer in mind when i asked the question .
another example is a guy on hifi choice who tried a 2kva torroidal and wasn,t very happy with the results .

ps , anyone who wants a link for the website, i,ll PM them as i,m not sure how i stand using his material .

 

The valve guys always use Frame type transformers as they say they are the best

Robbo

 

Having tried the RS units and other's in 2 seperate appilcations, I'm more than happy with the units I use Richard (may be something to do with there construction and they way the work) however it may not be the same for every one else. they need to try them for themselves
Also in an awful lot of cases of electrial isolation in instrmentations and circuits requiring 'vitrualy zip' mains interference, torriodial transformers are used due to the very nature, yes they couple better to ac than E-I core however E-I with pass through mains interference as well, though the torrodial being more sensitive will let interference through easier UNLESS it's dual wound opposite windings to cancel the interference out
Guess which one I use

 

cheers wm , i couldn,t find a smilie that shows "over my head"
but it looks like a case of whichever floats your boat as in most things in hifi .

 

Interesting discussion guys.

So what type of transformers do the Trichord and Lynwood units respectively use?

Tempted to get a Lynwood Mega to try on my power amp. Although I have promised myself no more boxes this year, should be saving up for my trip away in December.

 

tried the diy filter again after leaveing it turned on for a few hours, still not good. Think ill knock that one on the head

as an aside, would you expect speaker sound to get worse before better on the run in, dont know if its just me but they seem very thin today and somewhat confused when it get busy

 

Yes, when you run in speakers the sound seems to go on and off for quite a while. That is normal. It took WM's Shearwaters a good 200 hours of thrashing before they really came together, and boy was it worth the wait:MILD:

Th other possibility is that your mains is crappier than usual today!

Cheers, Robbo

 

Or WM to Kermit (note the SPEED of execution by WM and Kermy's struggle to maintain pace with the lighting brain transmissions of the speaker)



nah, still don't get it.....

 

Thanks for the re-assurance Robbo (you is the MAIN's man :slayer: )

 

i like the second one , especially the twitching eye

 

penance , you still ain,t given it enough time .
plug it in a socket miles away from your kit and just leave it for a couple of weeks , then give it a whirl .
you haven,t got anything to lose .

 

Ok, how about this, by having 2 sets of windings in the transformer, ie, in opposite directions, you cancel out the majority of the shit (common mode mains grunge), you will still some form of HF filtering to remove the high bandwidth crap as well.
How does it sound, ask anyone how's visit Rock 'n' Roll HQ
The shearwater's needed 200 hours to wake up and another 300 to come on song, but it was worth the wait. WM

 

okies

ill leave it under me desk as a footrest for a bit

 

Not really, just found out things over the years from my experimentation (usually failed) and listening to other peoples systems.

 

after a couple of weeks , plug it in by your hifi before you go to bed and then try it the next evening .

 

you lot must think im real impatient, not ready to wait for it all to settle


i want it now:JPS:

 

:cookie: you got the lid of that lynwood yet .
i,m asuming the trichord uses toroidal

 

Hi Robbo

Depends which set of compromises you're after. I can't remember it all off the top of my head now.

Cheers

 

may get some hands on deck soonish to check under the bonnet.

i'm sure its toroidal btw