Recent content by Alex SE

May a God bless you and give you a long healthy life. As it looks at the moment, retirement is not gonna be before (if) I reach 70 (21 to go). EU is pushing limit further and further. In a mean time, I will try to enjoy recording tapes and learn myself about electronics as much as I can. After...

Really, really fast. Boss marked that I'm not so happy atwork as I use to be and asked if he can help me somehow. The answer was: quit me! I want my life back.

... and I would be more than happy if I could get 90 minute Maxell XLII for a 5$ a piece :( Would buy 100 for that price directly. People are paying theese days even 2.5€ for a basic TDK D / Maxell UR from 90's and 10€ and more for Maxell XLII90.

Looking at those plots I would rather call it AD-F880SF (SF = Sci-Fi) Besides how good FR and rec are I just dont get it how did you get almost 100% equal channels. Nomatter what and how I do on my deck (you know which one) there is no way I can make L & R be so equal as on your plots. Did a...

I apologize for missing feedback. Too many things to take care of this days. Planning to do this and that over the weekend and when the weekend comes there is always something else or I just feel myself tired for doing anything Anyway, a deck got almost all caps replaced and a transistor in...

Have them now and complete set off caps for my deck. Unfortunately, my dear mother passed away and I have to travel ASAP. Everything else is not important now and have to wait until rainy days are gone... Of course I'be back and will share results here... Again, thank you all guys. You're great!

Thanx Gepetto and Alex and of course Vince who have spent so many hours and nerves to solve my problems. Just came from work and making order list (caps, resistors, trimpots, transistors...). Its gonna take some time but I cant wait to get my decks finally fully serviced, modified and adjusted...

You're welcome :) Hope there is someone who can help.

Looking for a ZVP3306a but it's out of stock at both Mouser and DigiKey, and I don't trust the others. Can buy it here in Sweden but I believe it's original from China, so NO. Anyway, I need a substitute for it but not sure which attributes is important to follow. Looking at DigiKey, there are...

... and a problem is finally found! It is MAX4066 that obviously cant handle voltage on IC9 position. Here is comparing MN4066 vs MAX4066. Observe that MN was there by the factory and MAX is coming from Mouser, so no fake chip.

Hope you guys don't mind I'm sharing a video instead of a picture :) https://www.facebook.com/reel/950251042891864?mibextid=kcDB8O

Well, the problem is located and is kind a weird. Alex A.N.T. advised me to trace a signal and see where exactly chat cut-off occurs. Using oscilloscope and 20Hz and 1kHz signals I should find a problem... and I did it, but using DMM since that I don't have oscilloscope. Feeding 1.5V to input of...

If this helps...

There are two separate inputs, regular and "CD direct" that is bypassing Dolby IC. Same loss with both inputs. A friend told me that there can be some HF filter but I haven't playing with such a mods. Replaced some opamps, added caps between the rails and replaced some switching ICs. Really...

What can be a reason of low frequency loss thru a deck? I was thought that there is some compatibility issue between a deck and sound card (Creative) but the results are exactly the same even with a new card (Scarlett). The worst thing is that I'm getting the same results with two decks of the...