yamaha a-1
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Yamaha A-1 transistor 2SC1913 & 2SA913 replacement
Hello, this is my first post so I will do a quick introduction. I'm relatively new to the audiophile community. I got into this whole world when my co-worker convinced me to buy his KEF 105.2 II speakers and now here I am. My main set up is KEF 105 + CA-2010 + SL-5100 TT & Wiim streamer. My... -
Yamaha A-1 high voltages
Hello, AK’ers I hope some Yamaha A-1 experts here can help me troubleshoot a weird voltage issue with my receiver. I attempted a recap/servicing on my A-1, which went well until the Electrolytics board, which was supposed to be the last one. I studied everything related to the subject on AK... -
Yamaha A-1 Transistor Replacements
Hello good people of Audiokarma! Since this is my 1st original post here, here's a couple of words about myself. I am from Canada and just like most, if not all of you I enjoy good music, good sound and some DIY-ing during my non-existent spare time. I've been a quiet observer of Audiokarma for... -
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Switches- best lubricant - home made.
Push pull switches. When servicing can anyone advise on best lubricant for these switches in vintage amps. Ideally, a homemade recipe as I just need to disassemble and regrease one switch. Can petroleum jelly be used? Thanks in advance.- Hifibythekg
- Thread
- amplifer grease lubrication switch yamaha yamaha a-1
- Replies: 5
- Forum: Solid State
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Transistor 2SC673A substitute / replacement
Hello, Please could someone recommend a replacement for: 2SC673A. It's in an A-1 Yamaha amplifier at locationTR214 on the Power Supply Circuit Board. Actually, a replacement for TR215, 2SD526, would be super helpful too.- Hifibythekg
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- 2sc673a 2sd526 transistor substitute yamaha a-1
- Replies: 5
- Forum: Solid State
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Yamaha A-1 speaker cut out
My nearly perfectly restored Yamaha A-1 still randomly cuts out! Power stays on and no fuse blown or magic smoke and amp runs relatively cool. All caps have been replaced. Brand new Omron speaker relay replaced. Offset, idling, all very stable and correct from the service manual. Most of the...- Hifibythekg
- Thread
- a-1 cutout speaker relay yamaha yamaha a-1
- Replies: 56
- Forum: Yamaha
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Yamaha A-1 volume knob repair disc
Hello all. The Yamaha A-1 has an aesthetically beautiful stereo volume knob. But, the flat disc section that controls the …. channel has worn lose in the centre. What’s the best cure? Blob of glue? Some substance to ‘pack’ the interior so that it’s a tighter fit? (Both of the above seem like...- Hifibythekg
- Thread
- a-1 volume volume knob yamaha yamaha a-1
- Replies: 15
- Forum: Yamaha
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Replacement output transistors for 2SA747 and 2SC116 - Yamaha A-1
Need to replace a pair of OT’s on a Yamaha A-1. Have a couple of recommendations but can anyone say which transistor pair is best suited OR has worked well in this particular amp (or both, of course!) Would like to place an order today if possible, so all replies much appreciated. Existing...- Hifibythekg
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- 2sa747 2sc1116 a-1 output devices output drivers to 3 transistor replacement transistor substitute yamaha a-1
- Replies: 3
- Forum: Solid State
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3D printing replacement hinge for Yamaha A1
Can anyone recommend a low cost 3D printing service that doesn’t have a prohibitively high minimum order price structure? Am UK based. Have the scan file and just want to create two plastic hinge sections on a Yamaha A-1, they’re only about 1cm square by 4mm.- Hifibythekg
- Thread
- 3d printing hinge yamaha yamaha a-1
- Replies: 3
- Forum: Solid State
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Resistors. How to determine voltage and other spec.
Need to replace some resistors on aYamaha A-1 amp. The Service Manual simply says they’re “Carbon 330ohms” but when ordering additional specs are offered such as: -power rating? -resistance tolerance? -voltage rating? Can anyone advise what I should be seeking for each of the above. (And how...- Hifibythekg
- Thread
- a-1 resistor yamaha yamaha a-1
- Replies: 10
- Forum: Solid State
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Yamaha A1 restoration 2021
Hi all. First question. Want to discharge those two big caps before I touch anything... Please can anyone tell me exactly how best I should perform this procedure? Apparently it was switched on in the last couple of days.- Hifibythekg
- Thread
- amplifer capacitor yamaha yamaha a-1
- Replies: 463
- Forum: Yamaha
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Yamaha A-1 using ‘pre-out.’
Hi, helpful fellow AKers have pointed out that the signal from the pre-out on the well-regarded ‘Yamaha a-1 integrated amp’ (note, not the DSP-A1) has to navigate the power section before arriving at the RCA sockets. This routing suggests that the pre-out’s signal quality will be comprised...- Hifibythekg
- Thread
- pre amp pre amplifier vintage. pre out yamaha yamaha a-1
- Replies: 6
- Forum: Yamaha
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Capacitor & Resistor Schedules used by Yamaha
Has anyone created a translation list of the symbols used by Yamaha? There are many components that are called for that appear to be a "Mystery of the Universe" Sorry to say I have discovered many more along this line.- Yamaha5000
- Thread
- cap identify capacitor resistor question resistors yamaha yamaha a-1 yamaha c-2 yamaha ca-1010
- Replies: 57
- Forum: Yamaha
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Yamaha A1 integrated amp (phono issue)
Hello, I just purchased a Yamaha A1 integrated amp. While the line stages sound great I'm noticing some problems in the phono stage. 1. The gain levels to achieve slightly loud sound output means I am turning the knob past 12 o'clock each time. (High output MM cart used). I have efficient...- MadcapLaughs
- Thread
- amp repair help help needed integrated amp phono vintage amp yamaha yamaha a-1
- Replies: 76
- Forum: Yamaha