Showing posts with label Radio News. Show all posts
Showing posts with label Radio News. Show all posts

Monday, January 19, 2015

How to Build A Universal Audio Amplifier And Power Supply - Radio News 1930

Another great Radio News article this one on building a universal power supply.




Wednesday, January 14, 2015

CBias Resistors Their Placement and Value Radio News 1930

Great lesson from 1930 on selection and importance of bias resistors.


Sunday, December 21, 2014

A New Era In Push-Pull Amplification - 1927

A very early 171 Push Pull tube amp article from 1927. Funny since Audion's started in the teens. 




Tuesday, December 16, 2014

Transformer-Coupled Amplifiers - Radio News 1926

Very early article on transformer coupled amplifers. Homework from 1926.



Wednesday, June 25, 2014

Power Amplification And The 245 Tube - Radio News 1929

I've been doing my homework researching the old triodes when I found this old article. It is just two pages but I also noticed the magazine was packed with info on the 245 and some on the 250. I included a few ads from the magazine as well.



I really like the simple utilitarian look of this amp. 225 245 and 280 tubes.





Tuesday, January 3, 2012

Modern Sound Projection - Radio Craft Feb 1930

I picked up a stack of 1930's radio magazines not long ago. Most of it is of course radio related but there are some good tube ads and theater articles. Here is an oldie on theater sound projection.






This post originated at retro vintage modern hi-fi http://itishifi.blogspot.com

Monday, October 3, 2011

Radio Of Unusual Size

Either that radio is really big or those girls are really small.

This post originated at retro vintage modern hi-fi http://itishifi.blogspot.com

Thursday, May 27, 2010

Radio News August 1926 Vacuum Tubes And Their Uses

Great very early article about tubes for the layman.