After hearing all these reasonable opinions, I'm going to use the chassis and also, if I can, the potentiometers to put on a simple Chinese kit that I already have and had wanted to mount for some time. Mount the transformers away from the chassis to have more space. Therefore nothing to do with...
I just wanted to know the brand and model of the chassis that I have shown.
If someone could give me that simple information, I would be very grateful
Many thanks to you and Frank Dernie, also Worth Davis, for multiple answers here
Thank you
It's probably a foolishness for you, but I really enjoy this type of restoration. I have material and transformers in the warehouse, coming from other projects. Thanks for showing your concern.
I wanted to know any detail, to get at least the valves it was containing, or if possible the brand / model or even the schemathics ...
in order to to use as much as possible all parts that are already mounted in the chassis for building / rebuilding a small amp project. It is not for...
Hello, I got this chasis, and I'd like to know more details about brand, model, tubes, or whatever it is possible to know. At the moment I suspect it was from a british amplifier, and probably wearing 4 valves. Is there any one who knows about it?
Thanks a lot
I got a working STK0039, with a reasonable price, from this german seller (EBay):
https://www.ebay.es/itm/Hybrid-IC-STK0039-Power-Audio-Amp/232572603623?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
Between pin 8 and 9 and opposite, the measurement is 2,2 ohm; the measurement between these pins in the good STK is about 10K ohm in both directions (not stable measurement). So I assume the right STK0039 is dead. I understand there are a lot of fake STK in the market and it is very difficult to...
Hi, finally I found the 2SC-2999 in a reasonable price, so I'm waiting to get it from UK.
After listening one couple of songs, the right channel went wrong again, and now returned back the 36,3V DC output. I was checking all fuses and most of the caps. When happened this problem R230 was burning...
Dear friends, I have just replaced the pre-driver transistor (2sc2705) for a 2sc3619, and ended all the DC current from the left side speaker connectors. After to test the old 2705 I saw there was some fault on it. Now the left side is also working!!!
At the moment (and temporarily) I'm using...
Hi, after replacing the fuse resistor R238, the right channel nicely started to work! and right channel speaker connectors are liking DC: 0,0V
At this point it seems half of the problem was fixed.
The output from the left side is liking now DC: -17,6V (there was a change in the polarity)
I have...
Hi,
First of all I wanted to tell you that this amplifier was found abandoned and I don't know about its history or the old owner treatments. It was not working, but VU-meter lamps were lighting. I was checking a lot of things in order to know what was going wrong. First of all there is a DC...
Hi, is there anyone that could send me the schematics (or service manual) for a Technics-SU2500 amplifier? I'm repairing one of these vintage amplifiers, and I didn't succeed to find the manual or schematic anywhere. Thanks in advance!