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I am experimenting with a new volume pot solution. When I restored my Au X1 in 2014/2015 the ALPS RK40 was OKish. I noted some wear on the tracks. I then cleaned it carefully (no deoxit) and it has been fine al those years. I always had a some balance issues with the RK40 so I just the power amp...

I have had this Yamaha B2 for some years and never had the time to look into the unit due to other things and projects. I am working on a Sansui AU111 and that will take some time to finish but in the meantime I would like to check if it is worthwile to start working on the Yamaha after the...

It has been a long time since I have been active here. My last thread about Sansui was for the restoration of an AU-X1. Now I think i start on a new challenge. Days are getting shorter and nights longer, so a new project is needed :) Some weeks ago i acquired a complete original AU 111, my first...

Some time ago i finished a torough restoration of a formidabele AU X1. Everything has been working perfectly for 2 years and it still does and it sounds great on all inputs except phono. I cannot find a solution for is the hum on the phono boards, especially on the MC input. On the MM input I...

Who has experience on the NEON to LED conversion for the strobe light on (especially) Sony turntables like a PS8750, PS6750, TTS8000 etc? To my opinion there are a few options: Integrating the LED circuit in the exsiting high voltage section of the NEON lamp Modify the existing high voltage...

I am looking at all the tantalum capacitors used in my Sony TAE-88 pre-amp, especially in the head amp and phono EQ amp: head amp 2 470uF/3.15V in parallel to a film cap: here they are in the amp, the blue caps with the yellow dip on the top: then there are these: All of these are in the...

I am wondering what the best way is to upgrade the wiring on my Sony PS-B80 tonearm? The current wiring is lit in cotton and i noticed some damages in the coating giving some hum sometimes. The turntable has been fully restored: - recapped - all through pcb connections desoldered and resoldered...

I am working on a TTS8000 which has very similar electronics to the PS8750 speed control. I am also now in the process of designing an alternative solution for the OKI MSM5576 oscillator that delivers the 240Hz, 480Hz and 960Hz signal. This is the same in both the TTS8000 and the PS8750! It...

dear AK members I am restoring a tts8000 motor (100v version). It has an issue with speed stability when using the Xtal lock activated. It kept the speed fairly good but once in a while the speed dropped significantly. I did some research here and on other websites and found that it is fairly...

Dear Fellow AK'ers after my adventure with restoring a Sansui AU-X1, i decided to start working on a PS-X800 which i have since a few years, but doesn't really work that well. I already did a few things: - recapped the power supply and checked all voltages according to the schematic - recapped...

I have two B1's at Clinic-Audio in France and have been waiting now for more than two years. Who else has experience with dealing with them?

After finishing my second TA-N7B i want to start on restoration works on my AU X1. The unit has been serviced by a so called specialist on vintage HIFI in Germany "Good Old Hifi" about two years ago, but i do not want you to show the work he did. After i received the unit back it did work for...

my next project is to work on a broken ta-n86b i have. The problem is in the power supply. I will look at the caps and the resistors first to try to find the cause. I was reading into all threads here and on other sites, but i started wondering about alternative power supplies for this unit...

I am looking at a defect TA-N7B. Before starting to work on it i first want to check the status of the V-fets. I have worked on these units before, but they where in full working order when i received them. I tried to find a procedure to check these devices. I found some on AK, mainly for...

How good are the kenwood l-09m? I already have one. About 2 years ago i bought a restored set via Ebay complete with a l-07c. It was send via an eBay logisitics center in the US and in the end i ended up with only one l-09m unit, i never received the other l-09m unit and the l-07c. I was...

Hello all, about 2 years ago i restored my first Sony TA-N7B, which has been running fine since then. At that time i already had a second one, and i bought almost all components to restore this on as well Now i have started on the second amp. I want to proceed on one channel first, to have...

Hi all, some time ago i acquired a NOS set of speakers, filters and attenuation pots for a pair of NS1000 speakers on EBAY. Complete in their factory boxes and completely sealed. All new and original. Next to this i have also acquired over time a complete set of used units, filters and...

Hi guys, who knows or has a sansui BA-303 Pre-amp? I can acquire one, but i cannot find a lot of information on it. It seems that it is a hybrid pre amp (tubes & transistors) combined with an active cross over. What is tube and what part is transistor in this unit and how good is it...

I could buy some NOS Fostex SLE20W. They look really new. As i understand they do not have surround for high excursion and low cone distortion. And i am wondering if someone has experience with these woofers maybe some detailed data on them. I am thinking of building a 2-way or 3-way system...

One of the last things i have to do is to replace the light bulb in the power switch of my restored Sony TA-N7B V-fet amp. Is a replacement or original still available or do i have to go a led. Does anybody know the voltage for the led? regards

I have a nice box standing next to me. An unpacked, Marantz PM-15 And i do not mean the latest Marantz S1, S2 or whatever version but the original one. 32Kg of copper. The delivery guy told me, please do not pack so many items in one box next time, way too heavy. Told him it was just one...

Hello Ak'ers. i am starting to refurbish my TA-N86B. I already dismantled the unit and cleaned it. The unit was playing fine before, i only noticed that i had to turn up the volume on the pre-amp before on of the channels would kick in. So i suspect the relays. What i want to do: -...

Hi AK, i have this idea. I was able to collect some ns-1000 speaker components including the filters. Well i have everything except the cabinets. I am wondering what to do. 1) Make a cabinet to original specs and use the passive filter or 2) Active setup with: Sony SE-P900...

Hello all, i used berquist kapton (sil-pad) for restoring my amp, in TO-3 and TO-220 shape. The TO-3 have an adhesive on one side, and i noticed that too late when buying them. I used them, but because of the adhesive i could not use grease on the pads at least on one side. The adhesive...