Tuesday, 19 March 2013

Cleaning some records

A lot of the records I buy are used and often from thrift stores like Value Village and the Salvation Army. Occasionally they come from yard sales or Craigslist. Often they are not very clean.

I really try to avoid badly scratched records, in fact I pretty much always avoid those. I can live with a few minor ones and will consider ones that are worse if it is a rare or unusual record and the price is right...like free.

Anyway, I can't stand damaged or dirty records and I have a few ways that I can deal with that. My day to day arsenal is below:

Record paraphenalia


From left to right in order of how frequently I use it:
  • Decca Carbon Fibre brush. I use this virtually every time I play a side, brushing it off each time. The one you see I have had for over 20 years and it still works well.
  • Magic Eraser. Say what? Yes Magic Eraser. It works well at removing accumulated lint etc. from the stylus. The piece you see here is inside a piece of titanium tubing I left over from my bike shop days. More on that later...
  • Discwasher brush with D4 fluid. I will use this on records that may be a bit dirtier in appearance but I don't think a bath is in order or I want to play it right away. 
  • Discwasher Stylus brush and SC-2 fluid. This is more effective in some ways than the Magic Eraser but is bit less convenient. The other side of the brush is a convex mirror for inspecting the stylus but I never use it.
These are essentially the daily use things. I have a couple of carbon fibre brushes and a few Discwasher or similar brushes, plus another style or 2. I pick them up whenever I see them in thrift stores cheap.

The records that I buy new rarely need more than these tools as I take good care of them. The cheap finds though often need a good bath. 

For this I have a SpinClean which works well when I have a large batch to do. It will work for 25 to 50 records on one fill, and can sit for several days or a week if I don't have that many to do at once, or much time. 

http://www.spincleanrecordwasher.com/

When I have just to a few to clean I have another technique. This involves a home brew mix of distilled water (90%), 99% isopropyl alcohol (10%) and a dish soap (a few drops). This goes in a spray bottle. I have another spray bottle with just distilled water in it for rinsing. 

I lay a towel out on the counter top or my smooth top stove, and lay the dirty record on that. The one below is not that bad. 

Record dirty

I give the record 5 or 6 squirts from the bottle, trying to avoid the label.


Record wet

Now I take a paint pad, the kind you use for edges and corners, and use it in a circular motion to scrub the record using light pressure. The thousands of short bristles work well to work into the groves. I do this for 30 seconds or more, then flip the record and do the other side.

Record brushing


After washing I rinse under the tap in the kitchen sink. I have a water filter built in and there is little added to Vancouver water anyway, so I feel this is usually just fine. After rinsing both sides, I let the water run off and place the record upright in the dish drainer to dry. I will sometimes give them a wipe with a soft cloth, usually microfibre, to hasten the process.


Record rinsing

Record drying

Sometimes the label gets a bit wet, but I have not had one damaged by this yet. I know some people will make elaborate clamps to protect the label, but so far I don't see the need.

There are also those that will use devices that cost hundreds of dollars to do much the same as I do, including motorized and suction devices to pull away the washing liquid. However I can't justify that expense and feel that my method works well enough and is far superior to doing nothing or some simple "spread the dirt around" brushes that I see.

This won't take a really abused & scratched record and make it new again, but it will help with dusty, mildewed and finger print covered vinyl. I can see and hear dramatic improvements in the records I clean with my simple methods that anyone can do for a very small outlay in money and time. Not counting the Spin Clean (which cost me about $70 on sale), the paint pad method described above should cost only about $10 to 20 for the fluid, brush, and the cloth to dry the records and be enough to do many records.  

Titanium Magic Eraser

Oh, yeah I was going to mention the Magic Eraser. This little thing is a minor abrasive based on melamine I think, that can be used for all kinds of things. How it is used to clean a stylus is simply by lowering the needle into a block of the white stuff a few times, preferably using the cuing lever. The lint and other accumulated crap is removed by the minute pressure of the tonearm tracking force.

You can use a small block of the Magic Eraser that you cut off the store-bought size, or do as I did and make a neat little holder for it such as in the above picture. The metal cylinder is a piece of titanium tube that I cut off the end of an old handlebar years ago. The tube is just sharp enough to make it's own cookie cutter stamp right through the Magic Eraser. Below is another block I made from part of a light fixture.

But you don't need to do anything special; I was just having fun with it!

Magic Eraser 3

  

Sunday, 3 March 2013

A $15 NAD Trifecta almost pans out.

I visited a thrift store that I don't get to often today. I have found a couple of things there in the past, but it is not close to me and it can be a bit odoriferous there and not so much fun to browse.

It's an SPCA store and the place has always smelled of cat pee. It's better now but being winter-ish weather they don't have the doors open. Apparently the long term old manager who did not care what the cats did inside is gone and they have cleaned it somewhat but it still can assault the senses at times. It may be an SPCA store but you still have to put the cats out when they need to go!

NAD stack


As soon as I walked in I thought I might be on to something though. Obviously recently arrivals as they were still in a box and not on the shelves were a couple of pieces of NAD gear. I have always had a soft spot for NAD so I dove in.

I found the 701 stereo receiver, a 6220 tape deck and the 5355e CD player, and ended up with all 3 for $5 each. I had to look around for a power cord for the CD player and a place to plug them in to test but eventually I managed to get some lights on all 3 units. 

The receiver appeared to work, but had what I knew to to be a very common problem with NAD and that was burnt out bulbs in the back light assembly for the LCD display. I have had several pieces where this is the case and have managed to fix them all. The good thing is that the thrift stores take the lack of display as a sign of not working at all. For most people that might be a big problem, but not for me, and the receiver was offered to me at $5.

The same price applied to the tape deck and the CD player. The tape deck worried me the most as the displayed LEDs for the meter were all lighting and I wasn't sure that it would be worth any investment to fix. However it turned out to be the easiest as all it took was a bit of tapping inside to find a bad connection and it worked fine. 

The CD player seems to have a bad laser assembly though. Most of the controls appear to work, but it does not recognize a disc in the tray. I might be able to find a TOPH 7810 somewhere though and install that...That is the reason for the "almost pans out" title of the post. I might have to spend some more money to make the CD player work, if I can do it at all. 

Anyway, the 701 looks good now that I have installed some blue LEDs in the backlight housing. It works great. i am recording some Santana for the tape deck in the car right now!

    

NAD set

Here are some pics of the process of fixing the 701 backlight display.

NAD 701

The original bulb is soldered in and has a supply voltage of about 12 volts DC. I have picked up some LEDs specifically for this purpose so I was ready to go. One LED is often going to provide too localized a display and potentially too focused. Some of the LEDs I bought are frosted to help prevent this.

NAD 701 bulb

NAD 701 LED

After removing the original bulb from the small PC board at the back of the display I wired 2 in series with a small resistor. I drilled a couple of new holes in the PCB to hold the LED leads, and used one of the terminals on the the PCB to connect one side of the circuit, and the other one with the resistor I made an off board junction with the supply voltage line but covered it in heat shrionk tubing.

NAD 701 LED 2

It ended up working quite well. I had damaged the tabs that held the small PCB in place but it had also been glued in and I did this as well. The colour is darker than the original and much more to the Indigo side of things but I think it looks good!

NAD LED display

NAD set

Sunday, 27 January 2013

A Smoking NAD Repair!


NAD 7020

The NAD 7020 I brought home to fix the other day was calling to me, so I started on it yesterday and finished it today. I almost finished it real good, but the smoke seems to have cleared.

I have always liked NAD equipment. The brand does have it's detractors with stories of cheap parts and poor quality control. I don't have much against them, as I have always liked the performance for the dollar being the cheapo that I am while still wanting good sound. I don't even mind the look which others put down. I have had more devices from NAD than just about all other brands, and kept them for longer on average. I do admit I've also had to fix more of them...

I used to have the NAD 3020 which was the integrated amplifier section of the 7020 receiver model. With that in mind I really wanted to play with this one from Clint.

Cosmetically this is in very good shape and has just a few minor scratches. It needed a good cleaning though. The usual dusting inside and cleaning of the switches and controls with contact cleaner I did yesterday. After plugging it it though I found another annoying issue.

NAD power switch 2

When turned on, even after another spray of contact cleaner in the switch area, the lights and also the sound to a degree sputtered and flickered. I've seen this before and decided to see if I could deal with it. It usually comes from electrical arcing in the switch and I saw it most seriously in a Pioneer SA-450 receiver, and I still have not fully addressed it there. The culprit in the Pioneer and as it turned out in the NAD was an ALPS brand switch.

It's a different model this time and appeared to be easier to access so I decided to go for it.

NAD power switch

Disassembly had to come after removing around 20 screws to get the cabinet and face plate out of the way, plus a number of wires to de-solder. The parts inside the switch of course decided to sproing out before I got a good look at how they went together. Figuring out how they went back together was trail and error...and trial and error...and so on, for about an hour until I had it right.

Anyway, age, dirt corrosion and so on lead to the arcing which blackens the switch contacts with soot or something similar. Taking things apart and scraping & sanding is just about the only way to address it. A simple spray cleaner does not do the job when it gets like this.

NAD switch parts

When I first saw it the round pad on the lower piece was as black or worse than the part above it that it had to make electrical contact with in order to turn on the receiver. There is another set inside the switch as well. Scraping with a screwdriver blade and sanding with emery paper cleaned things up quite well. This was the easy part. Now I had to put it back together.

NAD power switch 3

NAD power switch 4

Eventually I managed to figure it all out, had it reassembled and soldered together and had no flickering when I powered it on. So I reassembled the case, with the 20 screws of different lengths.

That's when the next problem arose. I had tested it before and the receiver had worked with headphones, tuning in AM & FM radio stations. Connecting a turntable and speakers came next... and so did the smoke!

It made sound, but a little curl came up from the cabinet in the tuner area. Powering it off and examining it, it looked like the smoke had come from a point on the main circuit board near one of the screws on the bottom panel. I am pretty sure I simply used a longer screw in that hole than it should have had and it must have contacted the foil side of the printed circuit board.

I moved some screws around, making sure the shortest ones were in those areas. I am only talking about a difference of 3 or 4 mm at most, but it was critical.

Anyway, no more smoke and it works great! No sparking, flickering, or scratchy sounds...just music!  

NAD 7020 2

Thursday, 24 January 2013

A Quick Kenwood Repair

I did a trip with my friend Clint out to Pure Sound today. We took in a Sansui amp, a Dynaco SCA-80Q and a Harman Kardon 630. I had had a look at the H/K and the Dynaco and they were both items that I did not want to take on trying to repair. The fellow there is a real audio technician; I'm just a hack.

Later I went back to Clint's shop and dropped off a Kenwood KD990 turntable which was one of my faster turntable repair turnarounds. Thankfully it was simple as the circuitry in this would have been tricky to work with. In fact it was not much worse than the best case scenario of a blow fuse, but it did not have fuses.

Kenwood KD990

It turned out to be (probably) just dirty contacts or sticky switches. It would not power on at first, and after opening it up and checking to see if it was getting power to the circuit board at the brown/red/black wires near the top, I simply detached the 2 circuit boards that the microswitches attach to and cleaned them with contact cleaner. I also pulled the black ribbon cables out of their sockets and cleaned those contacts.

Kenwood KD990 2

Back together it went and it worked!

It's a very nice and high quality turntable, weighing about 14 kilos. Unfortunately this one is a bit beat up which is quite the shame. The piano gloss black finish is not my favourite as it easily shows marks and this has more than a few of those. It also is missing a dustcover, and had an ugly Sansui headshell with an even uglier Stanton DJ cartridge on it.

Kenwwod KD990 3

When I took it back to Space Lab, I moved the cartridge to a better looking shell that was at least closer to the original model (not shown). I do like the tonearm with it's machined look. The antiskate is an interesting variation on the weight on a fishing line concept.

Kenwwod KD990 4

Anyway I did not get to to play with this one too much. It worked and sounded fine on the single record I played on it, but then it went back to the shop to go on display. And I am on to the next project, a NAD 7020!

NAD 7020

Sunday, 6 January 2013

Oh No! It's a new media format!

Sony Tapes

No it is not a new digital thing to take over from CD, Blu Ray MP3 or whatever. It's actually a very old format... Reel to Reel tapes. It's just new to me.

Even that is not quite true. I have used RtoR a lot but that was back in the 1970's either at home with cheezy portables or at CHSR radio at university where I used some very good gear and was pretty good recording and editing on it. I might have to relearn some of those skills.

I answered a Free ad on Craigslist and was not the first in line but the other guy could not make it in from Surrey right away and the owner called me back. The Akai 1730D-SS tape deck and the Akai AA-6100 amplifier that he gave me with it are still in the car (so no pics yet) but I got manuals, about 30 tapes, a tape head demagnetizer plus some Dual turntable parts and brochures too. Even the Puma sports bag was almost worth the trip.

Akai 1730D-SS

I don't know where I am going to put this but it should be fun to play with! At least it came with an instant music collection so I don't have to search that out right away.

Akai AA-6100

...I couldn't resist. I went down to the car and brought them up for a quick test before bed. I have Janis Joplin (backed with The Stones - Get Yer YaYa's Out) on the phones right now. It looks like the tapes were all recorded at 3 3/4ips and 2 sided. They are also about 40 years old, and the amp & tape deck have not been cleaned in any way so far so the fidelity and noise level is not the best, but they work!

Akai tape deck

Akai amp


Wednesday, 19 December 2012

I took a U-Turn the other day


Or rather I will take, or maybe get, a U-Turn sometime next year.

U-Turn Audio is a start-up venture by 3 young guys (geeks? nerds? hipsters?) with big dreams. Dreams of building a turntable they can bring to the masses at an affordable price but with great performance for the dollar.



They have been working on the project for over a year now and hope to have the turntable hit the market by the middle of 2013.  A few days ago they launched a Kickstarter campaign where essentially you pledge to support the product launch. Various dollar commitments will get you things from stickers to t-shirts to custom painted versions of their turntable.

I signed up. $150 is not a lot of money really and I am even thinking of upgrading to the next level of $250 so that I can get the acrylic platter and that green colour. I don't know about that colour but maybe I should go for it. It would be different from the other 10 or 15 turntables I have at least! It's not like I need another one, but if I eventually do get it (Kickstarter campaigns are not guaranteed) it should be worth it, from what I have read about the design so far.

The design of this turntable is very simple, and something similar to what I would like to try to build myself some day. I don't plan to mass market any ideas but would like to try my hand at it. Now where is my CNC machine?






  

Monday, 26 November 2012

Trying to get organized...

Yes I have to clean up and get some organization. My dining room has been a disaster lately and we won't even talk about the living room.

Some storage drawers will help with the various components: one for fasteners and fittings like RCA jacks and speaker binding posts, another for resisters, capacitors, coils and another for belts, lamps, LEDs and wire. That's a start...

Selling some of the extraneous turntables and receivers is part of the plan and having a better spot to display them for photos and auditioning will help. The new record cabinet helped as it gives me a good spot to highlight pieces. I turned an empty console stereo cabinet into a storage unit for 300 or more records in a few hours. It holds about 1/4 of my record collection but the rest of them are at least in some other form of shelving. These ones were just in piles until the other day.

Before:

Cabinet

After:

Record cabinet

After getting this corner of my small place cleaned up I was able to quickly set up and swap in and out several pieces of gear for photos. One sold right away and others had interest. Another I just took the pictures for and did not advertise as I don't know if I can sell it...yet!

First, the Akai AP-004x turntable which is a very attractive turntable and a Sanyo DCX-1970k receiver.

Akai AP-004x 3

The Akai deserves another picture:

Akai AP-004x 4

This cute little Sansui R-5 receiver sold practically immediately after I Craigslisted it:

Sansui R-5.1 jpg

The Technics SL-D2 was up next:

Technics SL-D2 4

And one of the receivers I am not sure I want to sell, but took the pictures anyway, is the Mitsubishi DA-R10.

Mitsubishi DA-R10

I know I should get rid of it...pay some bills, reduce, unclutter...but darn! I like it...

Mitsubishi DA-R10 3