Roger Gorke
Well-Known Member
And you all didn't even know you did!
I've been pining for a CA-800, CA-1000, CA-1010 or similar since I first restored my CR-600, then CR-800. I took the plunge (and gamble) and got one off that auction site from Japan at 100v. The ad said it was untested and only turned on, meaning the red light went on. I have read through most, if not all, of the CA-1000 restoration threads and figured I could fix it, especially at the price I got it. I knew, at a minimum, I could run it off my variac and potentially switch taps if it had the right power transformer.
It arrived on two days ago. I opened it up and did a visual to see if anything look burnt or really messed up inside. Fortunately, it looked really good, dirty but good. I blew it out with some compressed air and squirted the pots really good with Deoxit. Then I slowly brought the power up with the variac...then I heard the 'click' and thought, well that's good news!
Then I went through and checked all the voltages and they were all very close. For example, the primary differential was 15.5 v. After setting all the voltages dead nuts on, I plugged my iPhone into the aux and out came great sounding music!!!
After successfully testing the phono inputs, I decided to install some better speaker binding posts for the A speakers. I was then getting this horrible farting low end noise when I turned the amp up past 2. Evidently, I didn’t have the back panel secured properly and something was shorting. Once I got it straight, that noise went away….until…I started getting a hum from phono 1.
Every other input phono 2, aux 1 and 2, etc was dead quiet, just phono 1. I figured that since phono 1 goes through the MC board, it must be those caps. I replaced the six electrolytic caps (I only had 220uf 50v, so that’s a bit over kill…). Hum still there. So I pulled out the function board and the rear input board and sprayed dexoit in the function switches and in the phono 1 selector switch and worked them back and forth really good. Success!!!
Both of those potential sources of hum came from years old threads and posts from merrylander and avionic.
Plans moving forward include leaving it as is for a bit to see if anything else needs fixing.
I plan on switching the PT tap to run it on 117v.
I may consider a full recap at some point in the near future.
I've been pining for a CA-800, CA-1000, CA-1010 or similar since I first restored my CR-600, then CR-800. I took the plunge (and gamble) and got one off that auction site from Japan at 100v. The ad said it was untested and only turned on, meaning the red light went on. I have read through most, if not all, of the CA-1000 restoration threads and figured I could fix it, especially at the price I got it. I knew, at a minimum, I could run it off my variac and potentially switch taps if it had the right power transformer.
It arrived on two days ago. I opened it up and did a visual to see if anything look burnt or really messed up inside. Fortunately, it looked really good, dirty but good. I blew it out with some compressed air and squirted the pots really good with Deoxit. Then I slowly brought the power up with the variac...then I heard the 'click' and thought, well that's good news!
Then I went through and checked all the voltages and they were all very close. For example, the primary differential was 15.5 v. After setting all the voltages dead nuts on, I plugged my iPhone into the aux and out came great sounding music!!!
After successfully testing the phono inputs, I decided to install some better speaker binding posts for the A speakers. I was then getting this horrible farting low end noise when I turned the amp up past 2. Evidently, I didn’t have the back panel secured properly and something was shorting. Once I got it straight, that noise went away….until…I started getting a hum from phono 1.
Every other input phono 2, aux 1 and 2, etc was dead quiet, just phono 1. I figured that since phono 1 goes through the MC board, it must be those caps. I replaced the six electrolytic caps (I only had 220uf 50v, so that’s a bit over kill…). Hum still there. So I pulled out the function board and the rear input board and sprayed dexoit in the function switches and in the phono 1 selector switch and worked them back and forth really good. Success!!!
Both of those potential sources of hum came from years old threads and posts from merrylander and avionic.
Plans moving forward include leaving it as is for a bit to see if anything else needs fixing.
I plan on switching the PT tap to run it on 117v.
I may consider a full recap at some point in the near future.
