Mullard CV2492 gold pin cryo tubes . Somebody talk to me who has rolled a set of these into the preamp. I presently have a set of Tungsram E88CC/6922 and did not see a substantial change from stock tubes. What cha got there...? |
Sbayne, interesting especially considering the didgital metered display which may be a source of rfi interacting with the transformers.
On the inside rear panel, do you think the speaker output wiring proximity to the preamp tubes might cause any interactions?
Also stock power cord or? Mine did not come with the factory ac cord so I am needing to find something synergistic that moves the performance in the right direction. |
Work in progress....My speakers don't really allow me to turn up the volume much past the 9 o'clock position with out involving the neighbors and I also noticed the lack of heat produced and decided to try something to see if it improved the performance. In the past my MC275 tube amp sounded ok at lower levels but really started performing at the higher volume levels. Anyway I have a sony cd with an adjustable output so I simply dropped the input signal and cranked up the DK to the between the 11 & 1 o'clock positiion to see if hopefully it works a little better. I think I may be on to something.....
Does anyone have any info on what the pots on the preamp board relate to? I remember reading something about the adjustablity of the input...
The meter is not as entertaining but I am thinking at this point that it sounds better..... |
Sbayne,
I went to the Zcables website and was reading the Black Lightning info and noticed that they "do not advise the 12AWG for amps producing over 200 watts non didgital" I emailed and received a reply from Mark Hampton stating that high current amps may benefit from a larger AWG. "The more complicated answer it that sometimes amount of current is the most important thing for power amps, and sometimes quality of current is."
Do you or anyone else know what the DK provided ac cable AWG was? Anything unique about it? Also other owners...what power cable are you using with this amp to benefit its performance?
|
Sbayne, I was thinking also about the "integrated" issue with both the preamp and the power amp being fed at the same time from the same hose, er... cable.
Hey in relation to the modified VS1MKII I wonder if the Parts Connexion could modify it to separate it up to provide for an external preamp power supply and as long as we're dreaming, how about a separate amp only input! Somebody stop me!! |
I do most of my serious listening with vinyl and did a phase test with the Shure test recording TTR-110 through the phono and input A and the phase was reversed. I flipped my speaker cables red to black, black to red,to correct this. FYI- I use Silver Sonic Q-10 speaker cable presently connected to full range dipole speakers (Hunt Janni Tombstones-DIY). I am looking for my test CD to check the input I use for CD play (mostly background music as my setup is in my living room...... |
Sundance1,
I also am interested in what the Parts Connexion upgrade path could do for my unit and would love to hear about the options, process & timeframes, and of course, the results during and after break in.... I would highly encourage you to post your thoughts and progress for us other owners interested in what is possible. Thanks in advance and best of luck in your quest! It would be great to be able to bump up to higher level of performance keeping in mind the "Fun per dollar ratio" we all love about this model.
Best regards,
Jon |
Jimtyrro,
I read that the input level is ajustable from the preamp pots but that is all I know at this time. It was in relation to dropping the gain to allow for a "hot" phono preamp input voltage. If you find out anything, please post and I will do the same. I noted the same thing on an earlier post on this thread.
Jon |
If you are not in a big hurry, apparently exemplaraudio.com will modify (commissioned project) these to add their "active" tube control circuit design as seen in some other tube preamps as well as other design issues (capacitor / power supply mismatching) and upgrades to parts. They are known for mods to the Denon 2900 & others to kick them up into a higher performance category. They also offer build services on the Bottlehead Valve Kits. Also rumored to be the design source for some of the DK signature version improvements.... |
I found a matched pair of RCA 7308 tubes and am thoroughly enjoying them. I would like to explore getting the Four Camille Cascode Constant Current Sources (C4S) to replace the stock plate load resistors ala Bottlehead topography and possibly replacing some of the stock caps with VH audio V-caps or better. Too bad DK does not presently offer past product upgrade support from Exemplar.... |
OK Lrsky, that's two shots
As a manufactor's rep, if you would like to contribute to, as the description of this thread states:
"tuning, customizing, hot rodding, tweaking, what ever.. as an OWNER of DK Design VS-1 MK2 to bring out the best in this amp."
Please do. That is the concept of this thread.
It does not say if you are the owner of the company that no longer sells this product... It would be wise to be proactive & supportive to these ends rather than reactive to the very owners already financially committed to this model.
Redd Foxx Atlantic SD18157 LP You Gotta Wash Your Ass
"It is better to wash your ass than to try to cover it"
mmm.... |
I received this email through audiogon recently,
"Jomoinc, My name is Tom Bery, National Sales Manager for The LSA Group. We will be offering an upgrade for the MKII amp to bring it up to the "Signature" status, as much as is possible. We are still working out the details and price. If you are interested I will provide details as they are available. Please contact me directly at tom.berry@thelsagroup.com, or 888-671-8607, if you are interested. Thanks."
Any one else taken the modification plunge? DIY or Vendor? |
