A9
Well I'm not certain about being real ? Their not burning or discoloured but let's say their hot enough to leave a burn mark on your skin , that worried me , I have some Takman 5w equivalent but much bigger physically, ive been trying to work out exactly what is right for these , so many opinions but surely there must be 1 correct answer ? The caps they need to bleed are 330uf x1 and 33uf x2 is there something better ?? But I don't want one of those big cement types ive seen thrown in , ive spent a lot of time and effort inside the app, but I'm also still learning
Well I'm not certain about being real ? Their not burning or discoloured but let's say their hot enough to leave a burn mark on your skin , that worried me , I have some Takman 5w equivalent but much bigger physically, ive been trying to work out exactly what is right for these , so many opinions but surely there must be 1 correct answer ? The caps they need to bleed are 330uf x1 and 33uf x2 is there something better ?? But I don't want one of those big cement types ive seen thrown in , ive spent a lot of time and effort inside the app, but I'm also still learning
A9
Thank you , as I said I'm still on a learning curve but I pay a lot of attention to this , I will see what other resistors I may have , I really question the quality of the ones I fitted , and so happens they were the ebay ones !! Everything else i get from hifi collective , should I increase to 3w ? Much thanks for the replys guys
Thank you , as I said I'm still on a learning curve but I pay a lot of attention to this , I will see what other resistors I may have , I really question the quality of the ones I fitted , and so happens they were the ebay ones !! Everything else i get from hifi collective , should I increase to 3w ? Much thanks for the replys guys
think were both confused now !! so the grey unbranded ones but i suspect fake in their values was supposed to be 200k 2w - the new pink Takmans are 330k 1w - and they are almost cool to touch , Takman rate their 1w resistors to run at something like 5-600w - physically they are big as 2-3w resistors - i know some people just dont worry about cheap stuff but i always buy good quality - as in the case of me risking buying the grey200k's from ebay - look where that ended up !! normally i use hifi collective because i trust their products - Takmans are about £1.00 each - ebay pack of 10 rubbish £1.50 -- NEVER AGAIN !!
Takmans
they are well worth the extra spend - all the other resistors in there are Amtrans - again superb quality and fair pricepoint ---
so my boyuu is still behaving well - very well in fact , at the technicians on Wednesday it had really good traces on the scope - sorry i cant tell you the technical stuff -- thats why i was there !! -- we found it was making about 9w running very cool and under voltages - about 2% distortion at absolute max full gain -- we helped this a little by changing the 500ohm resistance - so now rather than the pair of 1k (500ohm) we removed one on each channel - replaced with a 680r -- that has now given 404ohm resistance - i could see a big difference on the scope - really cleaned up the distortion -- no more can be got from this amp as simply the opt are rubbish !!! -- i might change them for better but now looking at building a pair of kt66-6l6gc pp monoblocks - hoping for about 30w+ -- so will probably leave the boyuu and put my money towards the new scratch build --- my boyuu is powering Klipsch R51-m spkrs -- about 92db sens -- so it does go pretty loud !! - above all its very well behaved -
they are well worth the extra spend - all the other resistors in there are Amtrans - again superb quality and fair pricepoint ---
so my boyuu is still behaving well - very well in fact , at the technicians on Wednesday it had really good traces on the scope - sorry i cant tell you the technical stuff -- thats why i was there !! -- we found it was making about 9w running very cool and under voltages - about 2% distortion at absolute max full gain -- we helped this a little by changing the 500ohm resistance - so now rather than the pair of 1k (500ohm) we removed one on each channel - replaced with a 680r -- that has now given 404ohm resistance - i could see a big difference on the scope - really cleaned up the distortion -- no more can be got from this amp as simply the opt are rubbish !!! -- i might change them for better but now looking at building a pair of kt66-6l6gc pp monoblocks - hoping for about 30w+ -- so will probably leave the boyuu and put my money towards the new scratch build --- my boyuu is powering Klipsch R51-m spkrs -- about 92db sens -- so it does go pretty loud !! - above all its very well behaved -
Spec is quite clear from the circuit diagram. Secondaries are:
5v @ 4A
6.3v @ 3.5A
6.3v @ 1A
315-0-315v [the choke is labelled 200mA, so that's a guide]
...and weighs 3.33Kg
Last edited:
