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The general opinion is that the 2SC458 can become noisy over time. I've read that mentioned with Akai and Sony decks, I believe. One replacement to consider is the 2SC2240, but there may be others just as worthwhile. Good luck with the mod...!

Hello, No, I'm afraid that's one deck I've not had the chance to work with. I've helped some friends with their RT-707 and RT-909 units. From a quick Google search the RTU-11 and electronics looks like a wonderful machine. Cheers, Ken

No problem, good question!

Hello, There has only been one problem, so far. I was working on an A77 and there was a buzzing sound coming from the input amplifier board, which is the one closest to the AC on/off assembly. It drove me nuts for several days. If I touched the cap it would buzz, if I put in an unmodified board...

Hello, No I'm not. As a newbee I'm learning my way around the site.

I'm glad the information was helpful. There is a mail order company called MicroMart and they have all kinds of tools for craftsmen. One is a combination dual alligator holder and magnifying glass. The deck is a fairly early version of the Revox PR99, which is the final incarnation of the A77...

Hello Larry, One approach to consider is to use a wood toothpick to support the cartridge clip while you solder the wires. If you have one of those alligator clip type holders use it to hold the toothpick with the clip on its end. There are some of those holders that have two alligators, one can...

Thanks for the warm welcome!

Hello Everybody! Great site! Having a selection of cassette tapes is awesome, I had no idea they were available. I've done just about everything there is in the audio business. Had an audio shop near Wash, D.C., repaired speakers, sold plenty of good audio. Look forward to participating in...