Crack Pot (yes in so many ways.....)

Alonzo · 2377

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Offline Alonzo

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on: September 07, 2013, 08:12:22 PM
So the pot on my crack (Alps Blue) is scratchy and the levels aren't even.  Guess I got a knock off or something.  Tonight I flipped the Crack over to spray the pot and just decided to remove it completely.  I use my Quickie for the volume control anyway so it should be a "no brainer".
How many people have removed there attenuator?
Also I'd like to check my logic with everyone, I've lost my manual somewhere.  So I'm going to replace the Alps with 2 62K Tantulums on the red and white wires from the RCA's then to A2 and A7 and then connect the open black wires together to ground the headphone jack. 
Am I missing anything?  Is 62K too low since the pot is 100K?
I think while I'm in here I should upgrade some caps.  The amp is complete but never finished...

Alonzo
Gameroom:>Mainline to HD820, SR45 to Pipette
>BeePree Kaiju & SII to Altec 19 knockoffs
Office:>BH Stat amp to Koss 95x, T20 SET to JBL 4309s
Den:> MorePlay 845 SET to Altec Valencia's

Offline Paul Birkeland

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Reply #1 on: September 07, 2013, 09:06:51 PM
Connect the two red wires together that would have attached to the pot. 
Connect the two white wires together that would have attached to the pot.
Connect all the black wires together that would have attached to the pot.

Place your resistors from center lug to shell on each of the RCA jacks. (62K is adequate)

-PB

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Alonzo

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Reply #2 on: September 08, 2013, 07:24:27 AM
Thanks Paul!!

Alonzo
Gameroom:>Mainline to HD820, SR45 to Pipette
>BeePree Kaiju & SII to Altec 19 knockoffs
Office:>BH Stat amp to Koss 95x, T20 SET to JBL 4309s
Den:> MorePlay 845 SET to Altec Valencia's

Offline Brunk

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Reply #3 on: September 24, 2013, 05:17:17 PM
Quote from: Caucasian Blackplate on September 07, 2013, 09:06:51 PM
Connect the two red wires together that would have attached to the pot. 
Connect the two white wires together that would have attached to the pot.
Connect all the black wires together that would have attached to the pot.

Place your resistors from center lug to shell on each of the RCA jacks. (62K is adequate)

-PB

Hi, I am wanting to not use the pot at all, because i have a preamp. I am able to solder the resistors on the center lug of the RCA jacks, but I cannot for the life of me solder it to the the shell. The "shell" is the threaded part correct? I don't know if it's the gold plating or the lead-free solder im using, it just wont stick. I even tried using stranded copper wire attached to the resistor in hopes of that working to no avail. Please advise!


Offline jimiclow

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Reply #4 on: September 24, 2013, 05:38:23 PM
I think PB meant the "ground" lugs.

Bottlehead Stereomour with V-cap, Mundorf, Alps
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Offline Brunk

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Reply #5 on: September 24, 2013, 06:10:21 PM
Quote from: jimiclow on September 24, 2013, 05:38:23 PM
I think PB meant the "ground" lugs.
That's what i was thinking too, but had to verify it. Thank you!


Offline Grainger49

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Reply #6 on: September 25, 2013, 12:55:28 AM
Just a suggestion.  When soldering to the already used ground lugs on the RCA jacks, first remove enough solder to see the hole in the lug.  Put the resistor lead through the hole, crimp, then solder.  Otherwise you are using solder to "chewing gum" the resistor lead to the lug.  Or, you could wrap the resistor lead around the bare wire that is already soldered to the lug, crimp, then solder.

Admittedly, the chewing gum thing is what we must do with most of the power switches, but it is a bad practice and unreliable.


Offline Paul Birkeland

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Reply #7 on: September 25, 2013, 07:49:58 AM
Quote from: Grainger49 on September 25, 2013, 12:55:28 AM
Just a suggestion.  When soldering to the already used ground lugs on the RCA jacks, first remove enough solder to see the hole in the lug. 

Eh, there's 1/2" of bare wire between the lugs, that should be easier to use.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Grainger49

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Reply #8 on: September 25, 2013, 09:21:59 AM
Paul,

That is the last sentence in the first paragraph.  Crimping onto the existing bare wire was my second suggestion.


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