What did I do wrong this time [resolved]

mkane · 3685

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Offline mkane

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on: May 27, 2015, 02:57:09 PM
  I purchased some 2.2 Clarity caps to replace the .22's I had mounted up. Now only one side play's. 1&6 voltages are fine but 2 & 7 are negligible. I also slobbered solder all over the out put jack on the side that doesn't play. Could I have shorted this out? thx. Ahhh, what fun.
« Last Edit: May 29, 2015, 04:30:08 PM by Caucasian Blackplate »


Offline aragorn723

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Reply #1 on: May 27, 2015, 04:20:28 PM
how about cleaning up the jack?  As far as I know, if the center conductor and ground aren't making electrical contact it should be ok, but it couldnt hurt to start with that.  You might want to check your solder joints in general too, I had a similar issue with a non working channel after changing the coupling caps to K75-10s.  After a couple of rounds of troubleshooting with the bottlehead folks, it wound up being a questionable solder joint on one of the tube sockets.  Do you have a solder remover?

Dave


Offline galyons

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Reply #2 on: May 27, 2015, 04:22:39 PM
Use your DMM to test for continuity from signal pin to ground on the suspect output jack.  If there is continuity, yes, the jack is shorted.  If there is not continuity, you will have to look elsewhere on that side of the circuit. The Q is a pretty simple circuit.  Get out the magnifying glass and look for solder bridges in the circuitry of the dead channel.  Let us know the results!

Cheers,
Geary

VPI TNT IV/JMW 3D 12+Benz LP-S>  Eros + Auralic Aries + ANK Dac 4.1 >Eros TH+ Otari MX5050 IIIB2 > BeePre >Paramount 300B 7N7 > EV Sentry IV-A

Thorens TD124/Ortofon RMG-212/SPU >Seduction > Smash^Up> Paramour 45 MQ >K12's

Offline mkane

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Reply #3 on: May 27, 2015, 04:51:50 PM
   2 fabulous reply's and when the wine wears off I'give it a shot. Probably in the am as I have a bit more left in the bottle.


Offline mkane

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Reply #4 on: May 28, 2015, 04:32:20 AM
  Big long buzz on the multi meter when testing suspect out put jack. I'll remove this and see if it can be salvaged. More to come.


Offline aragorn723

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Reply #5 on: May 28, 2015, 04:37:49 AM
worst case, you can replace the jack.  They're pretty cheap.

Dave


Offline mkane

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Reply #6 on: May 28, 2015, 05:34:11 AM
  Got that fixed but not showing any voltage on terminals 2 & 7


Offline aragorn723

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Reply #7 on: May 28, 2015, 05:12:55 PM
How many volts do you get if you put the voltmeter across the 2 inside batteries?  (you will have to flip the preamp over to the side with the batteries on it for this-measure between the positive terminal of one battery and the negative of the other-it should be ~38v if the batteries are fresh).  Is this a Quickie 1.1 without the pjccs?  Maybe check continuity from the battery supply to terminals 2 and 7 too, sounds like the either the batteries are weak or the voltage isn't making it to the terminals.  (when the batteries die I usually notice b/c the volume has to be turned up a lot more-just happened to me yesterday...  ) 

Dave


Offline mkane

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Reply #8 on: May 29, 2015, 04:57:32 AM
  Only showing 18.4v @ the battery's. This has the pjcc. Thank's for the help. When measuring for continuity between 2 & 7 I get a buzz.


Offline aragorn723

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Reply #9 on: May 29, 2015, 08:51:49 AM
nevermind, this shouldn't apply since the pjccs is installed.  In a Quickie with the pjccs, the 38v goes from the batteries to the pjccs board (IA and IB).  Do you have any voltage there?  The other measurements you'll want to check are A6/B6, and A5/B5. 

Dave


Offline mkane

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Reply #10 on: May 29, 2015, 10:44:52 AM
  Voltages check fine. 2&7 wont's have any volts as you pointed out, my bad. This thing should work both sides???


Offline mkane

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Reply #11 on: May 29, 2015, 10:49:20 AM
  And it does. Thank's for all the help. How many hours will these 2.2's take to come up to full song? I owe you a beer.


Offline mkane

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Reply #12 on: May 29, 2015, 01:25:45 PM


Offline aragorn723

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Reply #13 on: May 29, 2015, 04:49:31 PM
Glad you're up and running!  I'm not sure what the burn-in on those caps are, but you could probably search the forum as these are pretty popular.  Cheers!

dave


Offline mkane

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Reply #14 on: June 18, 2015, 10:41:49 AM
   Real close to 100 hrs. on the big ol' Blue 2.2's and were really singing now. Amazed at how long battery's last. Definite improvement over the .22's I had installed before.'


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