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In Reply to: RE: Heath monoblocks complete, sounding very good (picture) posted by PeterI on June 27, 2012 at 13:02:22
Replace the octal rectifier socket and add those .1 630v bypass caps on the SDS board too.
Follow Ups:
Socket already done. Funny that Mr Stokes doesn't mention the .1 bypass capacitors in his instructions. I figured maybe he backed off supporting their purpose.
I can always add them; maybe for comparison's sake.
Peter
The .1 caps have no effect except on older filter caps where it can lower the effective esr that the cap sees...If you have good low esr eletrolytics like panasonics or nichicons,.1uf bypass caps are pretty much useless.
Where bypassing really became popular was in the 70s and 80s on the big solid state amps with 20,000uf and up computer grate electrolytics because of their high esr..People then starting putting them on older tube amps..A 2uf oil or film and foil can make a difference across an electrolytic..I use 5uf ploys in the citation 2 decoupling capacitance.
When problems become increasingly difficult,we can always rely on our collective knowledge and seek relief.
Edits: 06/29/12
yes, thanks for info. I've never really done the ~.1uf bypass caps on PS electrolytics. But companies like ARC put them in on their best tube preamps such as SP-3, in 2 stages. And I think they know a thing or two.
I can always get 630V-rated Solen caps in 2-5uf values. There may be room for their big diameters.
Pete
they can have a bright tinny sound. If they are used, bypassed with 10th value polypro works well and then I think they can do well. Just my opinion after working with the Solen in all types of gear. I advised them to Mike of Quicksilver years ago and he bought a bunch only to tell me they were terrible. I had told him they needed to be bypassed and then do a good job but for some reason he didn't want to do the bypass so he never heard what they can do. For an all in one cap though, there are others but it depends on available area of course.
The Elaborate DAC=Johnny's Balloon Meshplate 27 Balanced Preamp=Balanced Six Pacs=Newform Research 645
iRiver H140/MB Balanced dac/amp/Ultrasone Ed. 9/JH13 Pro IEM's
see images at: www.pbase.com/jamato8
John
You are right in that there are better caps than solens but for bypass and filtering,the larger solens are decent..I will not use them in the audio path but I use them in speaker crossovers where no DC is present and there the larger values sound ok also,,Martin Logan uses one big solen in their 130k dollar Statement speakers in the bass crossover..
When problems become increasingly difficult,we can always rely on our collective knowledge and seek relief.
Edits: 06/30/12
I understand what you are saying. From my work with them, once bypassed, they step up quite a bit and smooth out but in my experience, only if bypassed, which is inexpensive to do.
The Elaborate DAC=Johnny's Balloon Meshplate 27 Balanced Preamp=Balanced Six Pacs=Newform Research 645
iRiver H140/MB Balanced dac/amp/Ultrasone Ed. 9/JH13 Pro IEM's
see images at: www.pbase.com/jamato8
nt
with the polypropylene (the orange ones) in .1 and and I would sometimes also use .01, they sound pretty good. You also don't have too much invested.
The Elaborate DAC=Johnny's Balloon Meshplate 27 Balanced Preamp=Balanced Six Pacs=Newform Research 645
iRiver H140/MB Balanced dac/amp/Ultrasone Ed. 9/JH13 Pro IEM's
see images at: www.pbase.com/jamato8
It could be he sent the .1uF 630v bypass details in an email.
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