My new amp Yamaha CA-2000

A legendary amp from the 70s.

My new amp, Yamaha CA-2000. Have not tried the speaker out yet (the speakers are on their way here). The seller said the VU meter and broken capacitors were replaced. Unfortunately, one of the legs was broken during shipping (not enough wrapping!). That should be an easy fix though.

The colors do not match...

Also not sure if it is ok to stack my tape deck on the top of the amp.

This amp has some great features for taping. I can play back from a particular source while recording from any source (except the tape deck itself). I can also record from deck 1 to 2 or the other way around. The record out select switch is passive, so the amp does not have to be on for the recording. The VU meter can be set to either speaker out or record out.

Updates: Replacing the VU meter lamps on my Yamaha CA-2000

Update: there is crosstalk between the inputs channels. I checked the resistance between two inputs, which was about 1megaohms. Resistance between L and R channels is about 2 megaohms. The resistance between phono input and other channels is out of range and indeed I do not hear any sound bleed in this channels.

Comments

Aiwa XK-009 overhaul

I won the yahoo auction for the legendary Aiwa XK-009 at about 45000 yen. It is considered to be the very best aiwa cassette deck from aiwa. Although it was working, as expected, there were some issues. The biggest problem was that it suffered from unusually high w&f, which was very audible. The previous owner installed the belt in a wrong way - the belt was wrapped around a screw. The belt was left with some rails-like groves. This deck is very sensitive to the belt. So I ordered a new set of belts from fixyouraudio. It was not the best belt for this machine (the best ones are from a website called something communication). I always ordered belts from fixyouraudio. I always had good results from them and expected no difference this time. The aiwa xk-009 was quite a pain to take apart. I took apart most of it except for the fast-forward/backward mechanism, which does not affect the performance. I removed the old oil and applied new oil (crc lubricant). The all belts were repla...

Sony wm D6 repair: muting module, speed control module, belt replacement, and recap

Just score a Sony wm-D6 in a good condition. The seller sold it as junk and untested. Maybe the seller (or whoever the previous owner is) actually tried and it did not work. I pulled the trigger anyway because the price (43000 yen) was not bad even for a non-working one. When it arrived earlier today, I tried it out and I was surprised that it actually played. Of course, there are some small issues, which I found and fixed later on. Muting Module The first problem I noticed was that the sound was crackling and a bit distorted. Later on it became intermittent (on and off). That happened even when it was in record monitor mode. I thought it was due to issues at the play-record switch, but no, cleaning the switch did not help. A quick search on tapeheads forum pointed me to the muting module. And indeed, removing the muting module made it play beautifully again (w&f about 0.05%rms). Time to buy a new muting module from scribbler_92 on ebay. Update (12/15/2022): the mute module from eb...

Sony wm-DDII PB level pots test

I made a test tape with 315Hz tone at 0dB with my Nakamichi CR-5. According to the sony service manual for DDII, I am supposed to adjust the pots so that the output voltage at test points is 32mV (my previous value was about 36mW), so I did that. However, it actually sounded worse after the adjustment. The middle was muffle and turning off the dolby made things much better. That reminded me of my D3 which was the opposite with big middle. The level pots in my D3 had been set to quite high to match the meter of device (to 0dB) (This might not be correct as different manufacturers could have different meter standards). I speculated that maybe reducing the pot level caused the dull mid (Dolby error). So I increased the output to max on left (55mV) and indeed, the mid was back. Turning the dolby on and off gave relatively small change compared to before. So what is going on? According to the forum post ( https://www.tapeheads.net/threads/p-4-l300-flux-density.8179/ ), the sony referen...

cliz305

Search This Blog