Wednesday, July 23, 2014

Stan White - Through The Miracle Of Multi-Flare

This is a very rare piece of audio history. Stan White made some interesting speakers. Some of his claims were over the top but so was his 4D Millennium speakers.



 HOLY COW!
Horns, horns, and more horns.... 
6 way system. 
I need to find a pair of these in good condition to hear...
 Did you read that.... 700lbs! 


Thank you Jon for sending me the link to this one.

Monday, July 21, 2014

RCA Twin Power

More RCA Twin Power Documentation.

Does anyone know during what years these were produced?

Sunday, July 20, 2014

Satchmo Preaches

From the church of Jazz. 



Friday, July 18, 2014

Thursday, July 17, 2014

1940's RCA TWIN POWER

 RCA Twin Power or the 3ft cube. I love big speakers but I still have to wonder why they designed and built a 3ft cube speaker. Love to hear this one.
 


Tuesday, July 15, 2014

Millenium 1200 Turntable

I just know Star Wars collectible fans are gasping at the horror but at least it wasn't new in the box. Chill out though because this is actually pretty cool. They get points for creative Technics 1200 modifications and also geek points for building onto a Millenium Falcon.


Monday, July 14, 2014

High Fidelity - Electro-Voice 12TRXB

I have one of these that I use for testing amps etc instead of blowing my good stuff. I dig the ad.


Sunday, July 13, 2014

Quad Iconic Ad Image In Color

This iconic Quad advertising image was used in many ways black and white as well as several versions of stylized garphics. I hadn't seen it in color before. I dig the MCM pad. They were not afraid to mix patterns.  That room makes my ears hurt.

Friday, July 11, 2014

Wednesday, July 9, 2014

BBC 301

The BBC heavily modified Garrard 301 decks. They took a beautiful simplistic turntable and do this to it....

More about them here.

Tuesday, July 8, 2014

A Horn Enclosure for Custom Installations - Audio 1953

 This would be a fun horn project. Audio magazine has several large built in horn projects and this is one of them from 1953.



Sunday, July 6, 2014

Racon Dynamic Units For Volume and Depth

Very cool Racon advert. I must admit that I do not know this horn. Would love to see it from another angle.

Friday, July 4, 2014

Be Careful Out There


Os Mutantes - Bat Macumba

Rural War Room - Lobster Brains

Devo - Are You Experienced

Worlds End Girlfirend - Eager Bereaver

Parliament Funkadelic - Mothership Connection 1976
45:42 oh yeah that is how you do it....

Retro Hi-Fi Girl Friday


Sunday, June 29, 2014

Slagle Autoformer Volume Control Modules And My First DIY

This is my first completed DIY project #I01 or I owe one. A while back I found a 1930's Phillips battery box and had refinished it for some project in the future. Ok I knew what I wanted it for as I was already a Slagle AVC fan. There are no power supplies or resistive parts which made it a good first project. Dave Slagle has cured me forever wanting or needing a traditional preamp. The AVC has been one of the biggest improvements I've made to my system.
I really dig the 80 years of attitude the box has picked up and glad it still shows. Problem is now I want to use this look again but I need bigger boxes for amp building.
 
This is the best shot I got of the  Slagle autoformer modules as I wanted to get them loaded ASAP.
These Autoformer modules operate in a slightly different manner than traditional linearly switched volume controls. Rather than using a single switch, two discrete switches are used to control the level. The switch on the left has 12 posiitons that are in 3.75dB increments. The switch on the right has 3 positions allowing +1.25dB, 0dB and -1.25dB modification of the overall level. By using this dual switch arrangement 1.25dB steps are possible. The total attenuation range goes from +1.25dB to -41.25 dB in 32 steps. The nature of the device skips the -3.75dB tap so the steps are +1.25, 0, -1.25, -2.5, -5, -6.25, -7.5...1.25db steps to -41.25 and off.

Q - Why use an autoformer volume control? I've been happy with a good quality potentiometer.
A - The simple answer is that most people find that the autoformer volume control sounds significantly better than even the best potentiometer or stepped attenuator. And it's not a subtle difference; most people report that the autoformer has such an open, effortless sound that they would not consider going back to a resistive device.
Exactly why they sound better is still under debate, but one theory is that it's because an autoformer doesn't attenuate by wasting energy. A fairly good analogy can be made to the transmission in a car. If you need to drive at a slow steady speed which method would you choose: (1) leave the transmission in high gear and apply the brakes to keep from going too fast, or (2) downshift into a lower gear that will allow the car to go the desired speed with minimum effort?
An autoformer is essentially an electronic gearbox that operates without wasting significant energy. Potentiometers and stepped attenuators adjust the signal level by literally turning the excess signal into heat. On the other hand, when an autoformer is adjusted for low volume level it actually makes things easier for the source, much like a low gear makes things easy for your car engine.
It becomes quickly apparent that the reflective load can be ignored in this case since it is many multiples of the inductance in parallel with it. Inductance gives you a impedance = 2*pi*Frequncy*L(inductance) or Z=2piFL. Its this simple formula that tells you what you need to know about the impedance presented ot the source.


Here you can see the acid burns from the old batteries that leaked  in the box. This was before and after wiring these up with magnet wire. I think the green wire sounds best ;-). Fortunately Dave's modules makes them very easy to install so even I couldn't screw it up.
 
Here are the left and right sides. 
 I tried many different new knobs on this box but they just didn't look right. After purchasing the wrong sized vintage knobs three times I finally got these and pulled the big selector from a Bud national radio I had. Lesson learned vintage box gets vintage knobs. 

There will be no labels. Perhaps that will keep party guests off my knobs.
Thank you Dave Slagle aka Intact Audio.

Saturday, June 28, 2014

TMBG - Don't Let's Start

This was my intro to They Might Be Giants back in the late 80's. TMBG was just what I needed at the time. I even called Dial-A-Song a few times. 

Friday, June 27, 2014

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.





Monday, June 23, 2014

Zeiss Ikon - Ikovox CD

Here is something we don't see very often a trio of Zeiss Ikon Sound. 
What didn't Zeiss build anyway? 
Quality is high and they look superb. 
Does anyone have additional information on these?


 









Open baffle still baffles me.....Didn't Olson set that straight?