News: S.E.X. 3.0 now shipping
March 26, 2017, 01:12:32 am

Recent Posts

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1
S.E.X. Kit / Re: SEX C4S Question
« Last post by proud indian on Yesterday at 08:46:04 pm »
Checked the voltage, they are bang on. No problem there.

Shreekant
2
Crack / Re: Voltage Check Issue
« Last post by BLACKPIPE on Yesterday at 03:02:38 pm »
The LED to A3 appears to be missing.

I can't believe I missed that step. I was wondering why I had an extra led, I was thinking it was in case the other one was faulty. Oof.

Thank you both for catching my mistake!

All the voltage checks were within normal limits!
3
Quickie / Re: Built a Quickie Today
« Last post by Leland Hankins on Yesterday at 11:10:07 am »
Everyone needs to take a look at the work done by Thomas Mayer on Vinylsavor, especially how he isolates the tubes from the top plate.  Some of the most beautiful builds I have ever seen, I get a lot of ideas from him.  Used his isolation technique on my BeePre.

It just occurred to me that I had never mentioned that my custom Quickie never had a problem with microphonics but I did with the stock build, (using the same tubes).  The top plate on the custom version was 1/4" maple burl and the sides were 1 1/2" chechen wood, the legs are two inch ebony with Isonode anti-vibration feet. Because even with the stock BeePre there was microphonics, but almost none with my usual custom build, mass is the main difference here. Just an observation!   
4
Quickie / Re: Built a Quickie Today
« Last post by Jamier on Yesterday at 11:04:52 am »
 I made the O-rings. It's pretty easy. You inject 100% RTV Silicon into vinyl tubing that has a 1/8 inch internal diameter. I cut my tubing into 4 inch lengths before injecting the silicon, otherwise the back pressure gets pretty high. You let it sit for a week or so and then cut the vinyl tubing length wise with an Exacto or utility knife.Cut carefully, you want to just penetrate the vinyl but not the silicon.Hold the leading edge of the vinyl tubing with hemostats or needle nose pliers, this will keep your fingers out of the way(I, of course, learned the hard way).Usually, if you cut most of the way through, you can split the vinyl by spreading it with your fingernail.
Once you split the vinyl you peel the length of silicon out of the vinyl.DON'T throw away the cut vinyl tubing! You will need it to complete the O-ring.Cut the Silicon into lengths of 1 3/4 inch.Roll some paper up creating a tube with a 5/8 inch diameter.Take the cut vinyl tubing and cut some 5/16 inch pieces.Insert one end of your cured Silicon into the 5/16 cut vinyl. Add some fresh silicon in the other end followed by the opposite end of the cured Silicon. You'll see excess squish out.Now push the paper tube over the joined o-ring. This will keep the ends from slipping out of the splice while this whole thing cures.You will end up with an O-ring that is slightly smaller than the tube socket. I tried this with larger diameter O-rings, but when I mounted the socket and retainer, the socket was not evenly supported by the O-ring. I decided that the o-ring does need to stretch a little so that it fits tightly enough to not pinch out when the retainer is tightened. That's why I don't think that you want to cut the o-ring before you install it.You might be able to lift the socket of a completed Quickie enough to get the O-ring on,but you will have to stretch it more since the top of the socket has a larger diameter than the pin end.If there is enough interest in this, and with Doc's Blessing, I could post a step by step pictorial but I don't want to clog up the Forum with something that might turn out to be a big nothing. Remember, I haven't heard a Quickie in the stock configuration, so i can't say for sure that this improves anything.
5
Quickie / Re: Quickie Mod Advice
« Last post by BNAL on Yesterday at 10:04:00 am »
I would suggest upgrading the pot. I use the eBay 21 step DACT step attenuator.
6
Quickie / Re: Built a Quickie Today
« Last post by Jamier on Yesterday at 09:36:56 am »
        Leland is probably right.I think it would be more effective if the bolts were also isolated.I have not heard a Quickie with the tubes rigidly mounted to the chassis, so I think some of you would be better judges of this scheme than I. As far as the retainer ring is concerned, I did line the internal angle  with RTV silicon and allowed it to set before mounting the tubes. You can see where some of it squishes out in the close-up photo. I first tried the Quickie  in front of a Stereomour II. I was impressed with the overall tone and presence but, the SII is a fantastic sounding integrated amp. So, to really test what the Quickie brings to a lesser amp I put in front of some Class D monos that I have (IQ Audios). Wow! These don't sound like the same amps. Big improvement. However, the ringing gets more pronounced with these, so I put some pieces of Deflex under the feet of the base and that helped a lot. I also loosened the bolts on the tube retainers to get more spring from those Bronze lock washers and that also helped. It still rings, but you have to touch it pretty hard to make it ring. Before the Deflex and backing the bolts off, it would ring from a touch to the shelf  that I have it on.This approach does not cure the ringing, but I suspect it helps. It will probably turn out that a multiple tweak approach will be required to eliminate the ring (if that's even possible). I think all you need to do is adjust enough things to keep the ring from being audible while your in the listening position. I totally think it's worth the effort, this little pre- sounds phenomenal!



 Jamie
7
Quickie / Re: Built a Quickie Today
« Last post by aragorn723 on Yesterday at 09:29:18 am »
Why? I think you can cut the o-ring, so no need to desolder anything.

That would be too simple!  Wish I thought of that :)  Where do you buy the o rings, and what size are they?

Dave
8
Quickie / Re: Built a Quickie Today
« Last post by Leland Hankins on Yesterday at 08:18:09 am »
To make the o-ring effective don't you need to completely isolate the bolts with o-rings top and bottom, bolts should not touch the top plate.  Wire hole insulators plugs (can not remember the exact name) could also be used.
9
Quickie / Re: Built a Quickie Today
« Last post by Bonzo on Yesterday at 08:10:08 am »
The o-ring idea is definitely a cool one, though it would probably mean de-soldering all of the socket pins
Why? I think you can cut the o-ring, so no need to desolder anything.
10
Quickie / Re: Quickie Mod Advice
« Last post by aragorn723 on Yesterday at 07:14:18 am »
If you'd like to try black gates, check out the link below:

http://www.thlaudio.com/bgcapitme.htm
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