yamaha a-1

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.

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.

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...

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...

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...

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.

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...

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.

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...

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.

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...