mod

Hi, I was thinking about replacing my original power ic which was faulty with the TDA7294 but dont know where on the board to solder wires to i was looking for pinout of the original SVI3105 power ic. if anyone would know please reply.

I took an unfinished, 25-yr-old design from a stalled business and scaled it down for the Minimus 7. It took me 2 weeks, from sitting down to get serious, to completion. I Zilched the crossovers: And came up with my own setup: And it fits well in the enclosures: The right and left...

HEY EVERYONE!!! Its me again, SO this is another ludicrous mod of mine but this headphone sounds 10x better that how it was originally!!!!! I did the mandatory earpad mod, removable one sided cable mod, and recentley tody I cut vents in the back and added wire mesh to make them open-backs, the...

Hey guys. I have been rearranging my components a lot lately for cosmetic reasons and had to unplug my timer various times. I got a pioneer DT-400 for a nice bargain and the little thing has been part of my hifi system ever since. I love the machine, but having to reset the clock every time...

Picked these up today at a thrift store, (well my dad did after scouting em out for me lol, I love that man so much) and upon doing some research on them when I got them home, I couldn't find any that have a woofer similar to mine. Anyone ever seen one like this or know the pros/cons of the...

I upgraded from my AX-596 to a P2250 this weekend (using an HTR-5960 as a pre on both). So far, the P2250 is a big upgrade. Testing on my Polk Monitor 12 will continue tonight =) So. - Any mods I should know about? I dd a cursory search and google, but nothing jumped out at me besides the...

Hey AK. I want to share this project as this might inspire others to either restore or make the fully rebuild. It should be mentioned that the Aragon 4004 in this thread is built by request, soo..... -some parts cannot be selected otherwise, as this is a request by the customer. The most...

OK>>>> pretend I said TRIAC.... ugh... sorry I've done a fair amount of work on this, and did the complete MKII upgrade and attempted to set the bias and voltage, but the supply voltage came on at about 60v and then started to decline... I pushed the main voltage reostadt just a little and the...

I've built 2 of these so far. The IPS screen is so much better than the original TFT. It really makes the 20 year old system fun again. The only original part is the GBA motherboard, so you have to find a working donor (they used to be cheap but not any more.) The screen, ribbon cable/...

First post on here! I'm sure many of you will cringe at the fact of adding bluetooth to a vintage receiver However I've been wanting to do it for quiet some time now, I just recapped the entire receiver and had a lot of fun doing it. Everything is running right and voltages are in spec (or...

Hey guys, I've got a pair of Polk Monitor 10 (or is it 10a? All I know it has the Peerless tweeters) I know that it's past time to change out at least the electrolytic caps in the crossover, but I need to find the schematic. I understand that some improvements can be made, changing electrolytic...

Welcome everyone, I have the Sony TA-F530ES West Germany version. Its very good solid amp and i like it. But i have heard that West Germany version has a few changes compared to other versions that makes it sound worse. I heard that it comes to one capacitor and resistor in preamp. I dont...

Hey everyone! Hope you are doing great, got a set of 4270 amp modules with original pair of 50V /15000uF caps (marking great). As this is all I've got I would like to know if someone could give me a hand figuring out what should be done to get it working on 2x70W (don't want to use it as...

Hey AK I'm planning af full rebuild on my Acurus P10. One thing I've learned from my earlier amp project https://audiokarma.org/forums/index.php?threads/acurus-a250-and-starground.815860/ is that I'll prepare better this time:)... Meaning I wouldn't have to wait for new parts constantly, but...

A while back I started a thread about restoring my uncommon 1960’s era Rek-O-Kut Rondine 2 belt drive turntable. Well, I fell off the map and the original thread kind of spiraled out of control, so if at first you don’t succeed, try try again. There she is. A little dirty but was neatly tucked...

I just bought an AR-XA. Looks to be from 1972. Amost all original. I'm planning to do some tweaks, and am planning an upgrade path. The first I had hoped to do was the mass loaded pulley from Vinyl Nirvana. I see its only for Hurst motors. Mine is a Haydon. Am I out of luck? The...

So I've got an old mid century Curtis Mathes console stereo that I scored on craigslist. I was originally going to just clean it up and use it as is but now I'm curious as to whether I could retrofit it with some vintage solid state gear I have laying around. I'd like to mount a Pioneer SA 9500...

Following very good experience with NS555 mod described in another thread by ecommers I decided to improve sound in my NS333. Yamaha used cheap parts in crossovers which apparently deteriorated with time. I just substitute one capacitor and one coil per speaker. Parts used (got mine from HiFi...

I'm posting this in D&S because I am asking about mods discussed in a CL ad, but figured people would comment on the asking price in the ad: https://losangeles.craigslist.org/sgv/ele/d/sony-cdp-x33es-hi-end-mod/6754922369.html If this can live in the Digital forum instead of D&S please let me...

Howdy. I'm a circuit novice trying to dig into this piece of equipment and get the most out of it. There are no schematics available, so I've been relying on bits and pieces of advice floating around the internet. The three things that I've found to be important are tube rolling, upgrading...

At my cabin I have a Panasonic SA-PMX9 micro stereo system that is a few years old. These systems were fairly good and fairly well reviewed at the time they came out (https://www.whathifi.com/panasonic/sc-pmx9db/review). I was never all that satisfied with the speakers though. They were a bit...

Hey Ak I'm restoring my Acurus A250 and at the same time making some mods, this includes new starground curciut. I'm splitting input and feedbackground (now they share same ground at input), but what about D3/D6...??? I parallel a 4,7uf/470nf cap over these for lower noise, but should I also...

I've not been quiet about saying my honest feelings about the AU-999 in the past. My earlier Sansui experiences were along the lines of AU-666, AU-555A, AU-505, AU-222. I was already in love but when I got my hands on an AU-777 and AU-777A I really fell deeply. I knew I had to have the TOTL from...

Is there anyone in the So Cal area that can mod the Yaqin MS-23B?

Finally got a laid back Saturday so decided to ditch the tweeters on my Polk R40's that just never sounded that great in the three years I have had them. I was thinking of using the CTS phenolic ring tweeter but remembered I had a pair of Samsung speakers in the garage. The Samsung cone tweeters...