Yaqin mc10L

[chrish]

0.03 seconds is 33 Hz, so yes, I would think it 'sloppy'.

[planet10]

Originally Posted by rntlee

Well, I found another article that compared the bass note decay time between various DF values. The difference in decay between DF>2000 and DF=1 is about 0.03 seconds. 3/100's of a second! I don't think that is even audible...at least not by me. So this has gotten me more interested in removing the GNF from the triode mode on my amp. I think I'll investigate adding a switch to turn off GNF for triode mode.

That example applies to speakers that have a system mechanical Q of 3 )on a quick scan). Those are out the window if you have speakers with a different mechanical Q. If for instance you have speakers with a mechanical Q of 0.5->0.7 or so (rare in today's world) the optimum damping is zero.

Amps & speakers have to be thot of as a system!

dave

[davidpaul]

Hi, Davepaul again after a few months break--- I'm not sure I'm doing this right, but--- I asked about a "hum/earth like" problem I was having [pages 12/13] and Jpeg kindly replied so I thought it only curtious to update. I tried the amp (MC 10 L) one last time befor starting swapping tubes round and the problem has never reoccured again, even after many hours of use!! Strange but true. New question -- has any one fitted the Screen Grid Stoppers/Current Limiters as suggested by Les Carpenter in his/her article " A Look at the Yaqin MC 10L" ?It has been suggested to me that these are a good safety idea.

[evansluytman]

Quick newbie question on the tube amps: I have a Yaqin 10L - my first, but I am not sure about the speakers connection. I have four 8-ohm speakers and is wondering if I can connect a speaker to each terminal?

[Barbieboy]

Hi Tweakers,

I have replaced the stock EL34 valves with SVETLANA 6CA7 with nice improvement especially with the soundstaging.

Next to go are the four (V1-4) 6NIs. Any recommendations please as I am a bit lost what to choose

Thanks

[Hi-Q]

I firmly believe the choice of 6N1 is very much down to personal taste. I have tried Svetlana 6N1P, they were an improvement but not a patch on the first quad set I bought. These were date stamped 1982 and instead of 6N1P, they were marked in Russian characters as 6H1N-EB with an additional OTK1 marking. These are the sweetest so far to my ears but I think everyone who has tried swapping out the originals will agree that you will certainly hear a difference.

BTW From feedback I have been receiving, it may not be long before I re-wire the heaters and fit 12AT7's :-)

[Barbieboy]

Thanks for the info

Also look forward to hearing about your rewiring,

Thanks

[jkorten]

@Hi-Q - not sure the 12AT7 would work as the mu is different from the 6922/6N1P type of tube. Wouldn't you change the DC operating point of the amplifer stage and splitter? I bet some other resistors would have to change. Anybody out there looked at the 12AT7 version of the Yaqin MC10?