Wednesday, June 29, 2016

WWII Tube Electronics Training Film

I love these old training films I'm still pretty green so these are very helpful.
This WWII training film familiarizes radio operators with Vacuum Tubes. As the film explains, these are the devices used in radios that control electric current between electrodes in an evacuated container. Vacuum tubes mostly rely on thermionic emission of electrons from a hot filament or a cathode heated by the filament. The grid and filament forming the tube are explained, as are some basic circuits, and a couple of electronics packages are shown.

Monday, June 27, 2016

Sonotone Speaker Advert

I've never heard or seen a Sonotone component but the pics show them to be of good quality. 
Does anyone make grill clothe like this anymore?

Sunday, June 26, 2016

Cholita Sound

Here is some mad flavor for your ears. Not sure what it is but I like it.

From the Byron Werner Dept Of Internet Research

Friday, June 24, 2016

Wednesday, June 22, 2016

How Good Is An Audio Transformer ?

Another good Audio Magazine article from the 50's.

Monday, June 20, 2016

High Fidelity Electro Voice Advert 1954

I dig the custom DIY furniture.

Friday, June 17, 2016

Retro Hi-Fi Girl Friday

Thanks PM Summer for this extremely retro HiFi Girl.

Wednesday, June 15, 2016

TRANSISTOR Hi-Fi When and Why - 1961

We are crossing over to the dark side with an article about transistors from 1961.

Monday, June 13, 2016

Arnold Magnetic Materials

All the supplies you needed for rolling your own transformers. Where do transformer rollers buy this stuff these days?

Friday, June 10, 2016

Retro Hi-Fi Girl Friday

I guess you get a 45 with every bra?

Thursday, June 9, 2016

Ampex 600

The Ampex 600 RTR. I love watching the wheels go round and round.

Wednesday, June 8, 2016

At Home With AUDIO 1954

Cool old article about cutting your own vinyl.
Hot Stylus in a Hi-Fi Groove

Saturday, June 4, 2016

Local Score David Bogen Model DB20DF MONO

I picked this Bogen mono integrated for $60.
 I haven't cleaned it yet but here it is all crusty.
 It has an interesting damping factor knob.
 There is one Amperex 12AT7 but it is abit harry.
Appears to be 6L6 push pull and the tubes are black plate.
Has a nifty ruble filter and advice. I've only seen one person hot swap tubes that was Dave Slagle. 
 Some of the caps are nice and bubbly.

 Any advice or feedback on this amp appreciated. I actually have need of a stable mono amp.

Friday, June 3, 2016

Thursday, June 2, 2016

On a Chassis Built for Two - 1959

A 1959 survey of nine stereo power amplifiers.

I would pick the LEAK.