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 Post subject: Re: Vintage power supplies for battery operated radios
PostPosted: Jul Sun 03, 2016 8:34 am 
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Joined: Aug Fri 28, 2015 9:26 am
Posts: 813
Location: Fort Mohave Arizona 86426
Here is a photo of the Electro Model P Sam


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Electro Model P.jpg
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 Post subject: Re: Vintage power supplies for battery operated radios
PostPosted: Jul Sun 03, 2016 8:39 am 
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Joined: Aug Fri 28, 2015 9:26 am
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Location: Fort Mohave Arizona 86426
here is the inside


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Electro innards.jpg
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 Post subject: Re: Vintage power supplies for battery operated radios
PostPosted: Jul Fri 29, 2016 11:00 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 7595
Location: 13 Critchley Avenue, PO Box 36, Monteith Ont, P0K 1P0
Courtesy of bandersen on this forum, the following schematic, for the model "P" appears to be identical to the "Electro Model P".

http://www.nostalgiaair.org/pagesbymode ... 019582.pdf

cheers

John


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 Post subject: Re: Vintage power supplies for battery operated radios
PostPosted: Jul Sat 30, 2016 12:06 am 
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Joined: Aug Fri 28, 2015 9:26 am
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Location: Fort Mohave Arizona 86426
Thanks John


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 Post subject: Re: Vintage power supplies for battery operated radios
PostPosted: Jul Sat 30, 2016 2:52 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 4464
Location: Charleston, W.Va.
Hi John,
Thanks very much for posting that link to to what appears to be the Electro Model "P" schematic. Although I have an original operating manual for the Electro Model "P", which includes hookup instructions and diagrams and a parts list (with prices!), it does not include a schematic. I have searched hard and long for this schematic for several years. And lo and behold, it is right there in Riders! :D I have an original set of Riders myself, but never would have thought to search under Spiegel. 8)

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 Post subject: Re: Vintage power supplies for battery operated radios
PostPosted: Jul Sat 30, 2016 3:21 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 7595
Location: 13 Critchley Avenue, PO Box 36, Monteith Ont, P0K 1P0
Thanks guys, but it was BANDERSON who found it for us. Credit where due.

cheers

John


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 Post subject: Re: Vintage power supplies for battery operated radios
PostPosted: Jul Sat 30, 2016 8:35 am 
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Joined: Aug Fri 28, 2015 9:26 am
Posts: 813
Location: Fort Mohave Arizona 86426
Thanks Banderson


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 Post subject: Re: Vintage power supplies for battery operated radios
PostPosted: Aug Mon 01, 2016 8:21 pm 
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Joined: May Sat 30, 2015 11:49 pm
Posts: 613
Location: Keystone Heights, FL, USA
Maybe these will fit the category. First up, Philco Socket Power AB-460.

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File comment: Philco Socket Power, 4 volts "A" and various "B" voltages.
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File comment: Philco insides.
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File comment: Full wave electrolytic rectifiers (jumped with diodes)
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Increase knob adjusts Det. and 90V voltages. Charges the 4 volt battery when switched OFF; Switches 4 volt battery to A posts when turned ON.
Copper oxide rectifier in 4 volt charge circuit; funny, works fine with a 6 volt battery, too.
Snap-in resistor sets voltage for detector circuit.
Looks like something from Dr. Frankenstein's lab. What fun.

ACME Super BC Type 25 B and C power supply.

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DSC01656.JPG
DSC01656.JPG [ 138.82 KiB | Viewed 822 times ]

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File comment: Type BH tube and wiring connections.
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File comment: Original Ratheon BH tube fired up; purple haze.
DSC01654.JPG
DSC01654.JPG [ 85.8 KiB | Viewed 822 times ]


Both of these work but I don't leave them on too long. (Condenser cops---I know, I know---).


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 Post subject: Re: Vintage power supplies for battery operated radios
PostPosted: Feb Fri 15, 2019 1:27 am 
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Joined: Dec Mon 02, 2013 7:00 pm
Posts: 193
Location: Calgary, AB
I recently "acquired" an Electro Model 'FH' Battery Eliminator from I believe the mid 1930's. Would anyone have a Schematic for one of these 'earlier' Battery Eliminators? It is quite a bit LARGER than the later model 'P' & 'S' eliminators. Unfortunately there is NO schematic included inside this particular unit. Thank you in advance for any provided assistance!!!

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 Post subject: Re: Vintage power supplies for battery operated radios
PostPosted: Feb Mon 18, 2019 7:13 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 3423
Location: Olympia WA USA
I would think that quite a suitable supply could be made by using the transformer out of an old tube tester (Dick Smith Electronics used to sell them new here in the States), a few voltage regulator IC's and some zener diodes.

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WB7ELC
"The average family has 2.5 children. Where is the other .5 child?"


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 Post subject: Re: Vintage power supplies for battery operated radios
PostPosted: Feb Mon 18, 2019 1:22 pm 
Member

Joined: Jan Thu 01, 1970 1:00 am
Posts: 7595
Location: 13 Critchley Avenue, PO Box 36, Monteith Ont, P0K 1P0
FrankB wrote:
I would think that quite a suitable supply could be made by using the transformer out of an old tube tester (Dick Smith Electronics used to sell them new here in the States), a few voltage regulator IC's and some zener diodes.


That probably would work, but this thread is about orignal power supplies, and it's goal is to try to accumulate information on original power supplies in one thread.

Please don't hijack the thread with homebrew stuff? There's a forum for that.

cheers


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 Post subject: Re: Vintage power supplies for battery operated radios
PostPosted: Feb Wed 20, 2019 12:44 am 
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Joined: Dec Mon 02, 2013 7:00 pm
Posts: 193
Location: Calgary, AB
Thank you John for pointing out the purpose of this thread! I had a look at "Riders - Spiegel" & although the newer Model Electro Eliminators are included, I located nothing on the Model 'FH' unit. If you come across anything, please advise. Once again, thank you!

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Want DeForest Crosley Advertising ~ 1935!
Marconi; Stromberg Carlson
CKTA 1570 AM "Drive"


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 Post subject: Re: Vintage power supplies for battery operated radios
PostPosted: Feb Wed 20, 2019 7:02 pm 
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Joined: Jul Sun 12, 2015 9:47 pm
Posts: 110
Location: 94502
I have a Grebe socket power unit, which was apparently a factory accessory for the Synchrophase 7 to turn it into an AC7. It's pretty straightforward and good-looking, but according to the Riders schematic for the AC7, it provides filament voltages of 1.5v (for 5 26 tubes), 2.5v (for a 27 tube), and 5.0v (for a 71A tube) as straight AC. Only high voltage is rectified and filtered.

So my question is, is this thing worth checking out and fixing up (as needed), to power other battery sets? In other words, can I use AC filament voltage on 01As in three-dialers?


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