Got my CA-2010 back from Brad last week after did a good restoration/fixup job: fully re-capped, new relays, fuse-resistors, critical diodes, and trim pots. I've been using it happily since then. It's awesome to have a reliable working amp again.
Now, I am not new to Yamaha, the CA series, or the issues these have, but over the years I read many threads on AK about the 2010 and 1010 and a common thing seems to be heat. "they get hot" ...
So here I propose that you measure the temperature of your working CA-2010, CA-1010, CA-1000 or CA-800 (or any other Yamaha integrated with a "Class A" setting, maybe I missed some?). Maybe we can define what "hot" is and isn't, for each of the models. (I found an old thread that spec'd 138F for the 2010 in Class A.)
Here's the results with my 2010.
Unit is on top of a shelf, top fully open.
Room temp was about 75F.
Measured with the probe placed into and touching the top grill.
Normal Mode: 110 F I can easily keep my hand on the grill.
Class A: 130 F I can hold my hand on the grill but it feels hot to the touch.
I used a digital kitchen thermometer probe that displays 4 digits - now how accurate these are is anyone's guess, but it's a start. Measuring at the heat sink would require taking the case off, which would let the amp run cooler, so I figure this is a good (safe) common way to do this.
I'll do my CA-1010 (100% stock and original) in a few days and report back, and maybe add a picture.
Now, I am not new to Yamaha, the CA series, or the issues these have, but over the years I read many threads on AK about the 2010 and 1010 and a common thing seems to be heat. "they get hot" ...
So here I propose that you measure the temperature of your working CA-2010, CA-1010, CA-1000 or CA-800 (or any other Yamaha integrated with a "Class A" setting, maybe I missed some?). Maybe we can define what "hot" is and isn't, for each of the models. (I found an old thread that spec'd 138F for the 2010 in Class A.)
Here's the results with my 2010.
Unit is on top of a shelf, top fully open.
Room temp was about 75F.
Measured with the probe placed into and touching the top grill.
Normal Mode: 110 F I can easily keep my hand on the grill.
Class A: 130 F I can hold my hand on the grill but it feels hot to the touch.
I used a digital kitchen thermometer probe that displays 4 digits - now how accurate these are is anyone's guess, but it's a start. Measuring at the heat sink would require taking the case off, which would let the amp run cooler, so I figure this is a good (safe) common way to do this.
I'll do my CA-1010 (100% stock and original) in a few days and report back, and maybe add a picture.
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