Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
tube amp current mirror
Inv. side catode: ~2.2V
Non-inv. side catode: ~2.3V
Grids: 0V
I don't have proper equipment to test tubes and amp with sinewave, only basic instruments.
differential pair tubes sbalanced
Yes, this schematic is just an example. Real circuit has tubes instead transistors in differential pair and 470R resistor in emitors of transistors in current mirror, it's not directly connected with +V. Resistors and PCB are OK, I check that carefully.
1. I...
current mirror transistors
Yes, transistors are individual, as in many other amplifiers, 2xBC6xx.
I change it both at once, and this work well before the first problem (non-grounded amp plugged in the TV out), but after changing all transistors this problem remain.
current mirror transistor
Hi!
I have some problems with amplifier that I made, burn out, then repair :)
Here is it
**broken link removed**
This is not part of original schematic, but can explain situation. Left transistor is in saturation, emitor-base voltage is about 0.65-0.7V, but...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
