Good place to find IC IG02970 for Yamaha CR-840
- Thread starter ajiblock
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Which receiver are you asking about? Which model?
CR-840 specifically
Ok.. and which IC specifically? You need to provide a lot more detail if you want a helpful answer
Apologies, I'm new to this world.
The specific IC I need is IG02970. Let me know if there is other info that I can share to help!
Doing a Search here using the Search function provided a number of threads with (likely) helpful info. These are the ones that stood out to me:
Ongoing saga of the Yamaha CR-n40s
I think Merryander's original content is still legible The best DL I can manage isn't all that clear. Sorry if you've answered this too many times, but is there a higher resolution version available? I open that up to anybody else - do you have a clear copy of Merrylander's document that...
audiokarma.org
A question of compatibility between Yamaha pre-drivers
I have a CR840 with bad pre-drivers, IG02940, and possibly bad power amps, IG02970 and a CR640 with good pre-drivers, IG02950 and most likely good power amps, IG2980. Are these parts interchangeable? I got them both for free from CL from the same owner. He was quite a character and I really...
audiokarma.org
CR-840 in the house..with Bo's approval (and pictures) .
This had been up on CL for a while . I had offered the guy a fair bid but he blew me off . Then a week later I see the same listing with a higher price ! He had priced it high the first time . Then , after I had forgot about it , he calls me and said he would take my offer . So here it...
audiokarma.org
Yamaha CR-840 Advice
Hello. I have an old Yamaha receiver that I'd like to "tune up." Its pretty dusty inside but everything turns on and the audio is working out of the A and B channels. There is some scratchy/cutting in and out when using certain/most dials and I read that you can spray a cleaner (specific type to...
audiokarma.org
You can't get those exact modules, genuine and brand new anywhere. The ones from China are most certainly fakes...
They are rebranded Sanyo STK-0060II's. There are a lot of fake STK modules out there, so it's kinda a crapshoot. For the models without the -II there are discrete options that people have made kits of, but I'm not aware of anything like this for the -II's. I think I did see an updated version at some point that makes use of the extra connections that the STK-00x0-II's have, but never seen them for sale anywhere. edit: I found them, "delta9electronics" but they are much wider than the original modules in the CR-640 or CR-840 so won't fit the heatsinks.
I just went thru this for my CR-640 which uses some smaller modules, STK-0040II. I ended up buying them from a seller called "semitronus" from the auction site and they looked legit & tested very well. They might be clones too but they seem to be high quality. I made a vid on it where I stress tested them:
They do seem to have STK-0060II's in stock.
They are rebranded Sanyo STK-0060II's. There are a lot of fake STK modules out there, so it's kinda a crapshoot. For the models without the -II there are discrete options that people have made kits of, but I'm not aware of anything like this for the -II's. I think I did see an updated version at some point that makes use of the extra connections that the STK-00x0-II's have, but never seen them for sale anywhere. edit: I found them, "delta9electronics" but they are much wider than the original modules in the CR-640 or CR-840 so won't fit the heatsinks.
I just went thru this for my CR-640 which uses some smaller modules, STK-0040II. I ended up buying them from a seller called "semitronus" from the auction site and they looked legit & tested very well. They might be clones too but they seem to be high quality. I made a vid on it where I stress tested them:
They do seem to have STK-0060II's in stock.
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i have bought legit stks from that seller as well. as long as they were the oddball numbers, like mk 2s and xx39, they were legit.
i tried the xx50 and xx80 from him but the weight was so far off on each that i just boxed them back up and they gave me a refund.
This is amazing guidance. Thank you!
If you're looking for a legitimate STK-060 module, you may have luck with chrisautosound on eBay. They make replacement, work-a-like, installs-same-space modules for many of the STK modules. I've used the TA- series from them in my Kenwood higher end units. Looking at their current listings, they have a replacement module that works for STK-060.
I have no affiliation with this eBay seller. I am just a satisfied customer sharing my experience. No links were provided, so everything within current AK rules.
I have no affiliation with this eBay seller. I am just a satisfied customer sharing my experience. No links were provided, so everything within current AK rules.
Sadly he doesn't make any of those kits for the STK-00x0-II's. I vaguely recall that you may be able to use the regular ones in amps that came with -II's (the -II's make use of 4 extra pins that are not connected to anything in the original STK's - they just go to some extra capacitors on the PCB), so the kits might work but someone would have to reach out to him. I'd be surprised that he would leave out the -II on the product description page if it can be used to replace them, missing out on a whole market segment.
edit: I see on his eBay page it says it can replace "IG-0296", which appears to be a typo for IG-02960, since he has a picture of a burnt up IG-02960 in there. In that case, it sounds like it would work...(since its more capable than ig-02960 or ig-02970) cool!
edit2: his actual company website has a different description, where it says it works in ig-0297 - lol - so should be good to go. He needs to do a little website/auction listing cleanup.
they are slightly wider the the original yamaha/stk module, but I think they would clear based on looking up some pics of the cr840 heatsink online.
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Haha. I'm going to get one and will send a friendly note for him to update
Thank you for the guidnace!
audiotemp
Super Member
The 0060II differs from the 0060 by having an additional current gain stage (pre-drivers) to the driver + output only of the 0060 and uses a darlington rather than a single transistor for the bias servo. It also adds diodes that pass input directly to the output supply if the input voltage is higher than that. The 0060Ii has a somewhat higher current rating (8 A, vs 7 A for the 0060) and has a 10x lower distortion spec (0.01%, vs 0.1% for the 0060).
It might be an interesting conversation to actually chat with chrisautosound, explain what you're looking for, and get advice... and perhaps options... straight from the person doing all this work in and around the devices we're talking about.
