Mullet
1000+ Head-Fier
- Joined
- Jan 18, 2005
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More like... fun fUn FuN...
If it is still sticky, then you have not cleaned off all of the flux.
Break out the alcohol...
Rinse and repeat, rinse and repeat, ....
Most stores only carry 91% isopropyl alcohol. I have never seen anything stronger than 97%. Where did you find 99%?
You can leave it stand on the board for a short period to allow the solution to work. The key is to get the flux residual disolved into the liquid so that it can be poured off or wiped off/absorbed with a cloth or paper towel. If you used liquid flux in addition to the flux in the solder, it can take a fair amount of work to dissolve all of the residual.
As Kim pointed out, be sure to clean the toothbrush as well. The bristles can hold a fair amount of gunk. I actually use a couple of them during the process. Rotate them to keep them clean and effective.
Congrats mrhk13! It's one hell of a little amp. I just finished a another pimped CTH build. Yep, it's the same one I've been seeking troubleshooting help with on the last couple of pages. I picked up a Belleson 24V super reg and some Hovland caps for this build, and I made the error of building it first time with these parts. Right channel fine, no left. I start poking around months ago trying to figure out the problem, and in the process I shorted out a bunch of BJT's. Being stubborn, I spend a couple of months studying the circuit and tracking down the offending transistors (Q4*). I put in stock reg and caps, fired it up - right channel no left. I checked ICL, and I wasn't getting the output I should so I changed ICL. Right channel, no left. Frustrated, I pressed down on ICL and my left channel switched in!!! Hmmm. Powered down, flipped the board and re, re, re checked my joints. Damn. One pin of ICL I DIDN'T SOLDER! Can't tell you how many times I looked at that. Soldered, fired it up, all is well. I then proceed to swap in my new reg and caps one at a time. The circuit took them just fine.
So here's what I want to leave you with. If you're using a non-standard case and have the room, you MUST swap out the 24V reg with a Belleson. The sonic improvement is huge. With the Belleson and the caps, this little amp has push aside my Lyr with my HE-500's. Very, very, very good.