Showing posts with label triode. Show all posts
Showing posts with label triode. Show all posts

Monday, December 8, 2014

A HIGH-POWER OUTPUT TUBE - THE 250 - 1929

An early article about the 250 from the Westinghouse Lamp Company.  I wonder if Tesla was still working for Westinghouse in 1929?
  
Here are a couple examples of the mighty 50. The first is my fave as the construction is over the top compared to the others which I am sure are great tubes. But you have to admit they look sad by comparison. 






Monday, October 6, 2014

Tone Quality - General Amplifier Company - 1929

They do not get points for creative company names but I like the industrial look of their gear. They are building around the 250  and 245. I with they had a picture of the GA40 with four 250's and four 280's. Certainly overkill back in the day.


Wednesday, September 24, 2014

Designing And Constructing Direct-Coupled A.F. Amplifiers Part 2 - 1933

Here is part two of a 1933 article from Radio Craft on designing Direct Coupled amps.





Monday, September 8, 2014

Engineering Features Of The UX-245

A great article about one of our favorite triodes the 45.
 

Tuesday, December 1, 2009

Brook Electronics Since 1934

First in the High-Quality Audio Field Since 1934

Brook was among the first consumer Hi-Fi audio companies. Born out of the glory days of the triodes.

Model 22A Integrated



Here is a very detailed 22A schematic.


Model 7 Preamp



Documentation on the Brook models is rare. I have scavenged for what I have posted here and some I haven't but what isn't posted is mostly schematics. That is except the next post which will have an ultra rare PWK mod of the Brook 12A schematic specifically for the Klipschorns.