How much better do they sound over stock, Mark?
Printable View
How much better do they sound over stock, Mark?
Better, I couldn't give you percentages :) The thing is the standard output transistors have pretty low current gain & imho this loads the driver (which happens to be part of the voltage gain stage a little too much.
So I modified the amps to accept MJ11016 NPN darlingtons as output transistors, which have a current gain of about 1000 in the audio band. There appears to be less crossover distortion as a result. As the driver was more lightly loaded I decreased the value of the resistor that provides the class A power & again there was an improvement.
Think I'll have to change the op amps to something decent as they frankly deserve it. Only need six of them after all :D
OPA627s are good!
I'll use OPAs, but i think the 134? Might be wrong on that score...
Just secured my third 405 :) We now have (assuming all is well with this one) six channels of amplification :yay:
That's it, no more power amps needed... I have twenty (yes - 20) channels worth of power amps :eek:
Or if you like, four amps per channel with a 5.1 setup :cool: Active everywhere here I come...
Bingo i won it, they are actually very thin on the ground & look unappealing to a lot but they are actually good sounding Turntables, keeps within the era i'm obsessed with aswell :eyebrows: I'll fit either a Colton 'MC101' or Neat Corporation 'G30' tonearm with Goldring 'G800' cart.. providing it survives the post.
Leak 'Truespeed' £56.00
Well done André,Quote:
Originally Posted by F307
I always liked the look of the old Leak 'Truespeed' - very early '70s. :)
Do you intend using it, or will it simply be an objet d'art? I ask, because I'm sure one could do better than either the Colton MC101 or Neat G30 arm.
Regards
Hi BarryQuote:
Originally Posted by Barry
It's to be used everyday..Re the arm, must be early 70's.. :eyebrows: i want the two mentioned but would go for a late Hadcock 'Unipose ' if one came along.. I used to own both those arms & prefered the sound over the arm that a lot chose back then :)
:cool:
Nice deck Andre - I had my eye on that too!Quote:
Originally Posted by F307
If you want to keep it original, they were mostly used with Connoisseur SAU2 arms back in the day.
Ah yes! - I was trying to think of the arm identity. Too lazy to dig out my copy of 1971 Hi Fi Yearbook!Quote:
Originally Posted by Beobloke
I assume the Truespeed is a 'floating' belt-drive design.
Are unipivot arms happy on these decks? I seem to rememember there was a fashion for fitting Hadcock unipivot arms onto the Linn LP12, so I guess they can work well together.
Thats correct the one i had many moons ago had the Connoisseur..I'm gonna give that Ariston arm a try first see what it sounds like..Quote:
Originally Posted by Beobloke
Aye they are.. They have transit bolts so were all ok for nay damage in transit..Quote:
Originally Posted by Barry