Quickie mods

Not to be "Johnny Spellchecker" here..... Isnt it GRAMMAR?..... At first, I thought Paul was actually talking about a "real" Mr. Grammer, and again, ACTUALLY went scrolling for Mr. Grammer's post that Paul was correcting!  hahaha  Then, as I read it again, It hit me that he was referring to a grammatical error..... Yeah, yeah I know, I'm not very smart.... haha :)
 
Chris said:
Not to be "Johnny Spellchecker" here..... Isnt it GRAMMAR?.....
Click to expand...
I have corrected my post, with some embarrassment. Guess that will teach me to be less pedantic, or at least post more carefully after the second eggnog.  :^)

It isn't isnt, it's isn't. Isn't it?  Haha, sorry, couldn't pass it up. Good thing this is a forum of friends!
 
The thing is, I'm not shy about not being able to spell! I have been 'enabled' since a child, due to being a proficient mathematician. I would cheat on spelling tests and the teachers would just turn the other way! I dont let my son get away with that though..
 
4krow - Are you serious that dampening caps is beneficial, or was that post some humour outside of my range of comprehension?
 
I did damp my Vcaps and did not find any benefit. But having the  cap secured, rather than having it dangling on its leads did matter. So, if that amounts to damping then maybe be it makes sense.  On the Quickie, I have the caps (obbligato) placed against the frame and I have some silicon adhesive ( the kind you use in fish tanks, the stuff that remains soft)placed on the cap and the frame. I does not move and hopefully the soft adhesive helps.

I have used this silicon gel to line my subs as well, to avoid air gaps, and at the same time ensure that it does not harden and crack , due to vibration. I have tried to post some pics of my rooms, but it seems that the upload area is full. Maybe Doc will be in better shape on the 2nd !!!


shreekant :)
 
I damp (acoustically speaking) anything that has mass, hoping to make the mass combine with the structure of the chassis. Nothing really sounds different on it's own, so it takes combined effort make a small difference. Kinda like racing cars. Nothing on it's own stands out so much but tied together you might get another 1/4 second sliced off your race time.
 
Haha , Oh, I see Mr. Paul is a "tit for tat" kinda guy...  :)  And the word "isnt" is what I always do only because I am just too damn lazy.... I am not in the correcting business, but, I thought it funny that I went on the hunt for a 'real' Mr. Grammer.... And No sweat, eggnog is pretty dang delicious... However, after the holidays, we will expect perfection from you Mr. Paul... haha kidding... Enjoy your holidays embarrassment free, we all know you are a sharp cookie...
 
Hell... its pain to take out all the IC's and take a pic, cause than I have to let the cables settle in again, but if you do not get a reply ( which I am sure you will ) then I will do it.

shreekant :)
 
Thanks. I understand completely. The Parts Connexion product description of 'typical' balance pot wiring has introduced doubt (different than stock part), so do appreciate confirmation from anyone who's implemented a 2cp-601.
 
Brillo,

A balance control is much different from a volume pot.  Are you asking about a TDK volume or balance pot?  There is no balance pot on the stock Quickie.  You ask if the TDK is wired as the stock part.

If volume, look in Grainger's Corner (forum main page).  There is a FAQ thread that explains how to suss out what connector is which on an unknown volume pot.
 
Hi guys,

I am planning on upgrading my quickie 1.1 and will do the following

1.  Install PJCCS

Then after some time upgrade the caps and potentiometer.

I have a question and hope you can help me.  The caps in the stock Quickie are 2.2uf 250vdc.  I have noticed in this thread that people have upgraded to 2.2uf 630vdc.  Obviously this works but I am wondering if when going back to do the voltage checks this would affect the readings?  I am thinking yes but would like to know how to calculate what the new voltages should be.

Also would their be able big difference between a 400vdc cap and 600vdc cap?

I hope these questions are too much but would like a better understanding.

Thanks for your replies....Dave
 
I do not believe that new caps will change the voltage readings. The voltage specification just determine's how much max voltage the cap can take.

Best

Michael

 
You will pay more for a higher voltage rating. I tend to think its worth it. There appears to be some consensus that the higher voltage caps sound somewhat better. We all have to decide where to draw the line though. 
 
Your power supply is 36V.  The caps need not be any higher than that.  But to get good sounding caps you have to buy higher voltage ratings than you need.
 
Going back to the Clarity Cap MR that everyone uses... 2.2uf? And does the voltage matter? I can get the 400V much cheaper than the 630V ones. And the cap in the power supply can be any value, just anything over 36V? How many uf? Thanks
 
Hey Mortin - I agree to spend some $ on the coupling cap (2.2uf), dont need the super high voltage ones. That one makes the most difference, its also a reasonably small value to keep it 'affordable'.

The electrolytic (1000uf) is a bypass cap for the cathode resistor (Rk) that sets the bias. It eliminates negative feedback (cathode degeneration). Without that cap there would be negative feedback that would decrease gain. According to Paul you can go as low as about 47uf and not have any bass roll-off. I have a 56uf film cap in there. Most people like to get rid of the electrolytics if at all possible for a more restful sleep. Dont go crazy on that one IMO. Dont worry about the voltage rating as long as its 50V or over.

Enjoy -
here is a cathode bypass calculator to give you an idea of how that capacitor works.
http://ampbooks.com/home/amplifier-calculators/cathode-capacitor/
 
I think when you add lots of damping and some high quality coupling caps, having the film bypass caps bumps up the resolution just a little bit further.  It's not as noticeable as the couple caps but I think if you want it to sound its best and don't mind the extra expense then it's not a bad investment.  To be fair I lived with my original Quickie w/ PJCCS and stock electrolytics for a couple of years and loved it.  I just wanted to see how far the circuit could go with some refinements.  For the money it's still a ridiculous bargain.
 
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