[Milsurplus] ER65

Fri May 17 19:38:48 EDT 2013

So Al, what does that dissertation on batteries have to do with anything?  As I said, 65 VDC is its power source, i.e., the whole thing runs on 65 VDC including the two 12-volt heaters in the two ECH21 tubes in series with the huge power resistor you can see in the chassis view.  I can't believe anyone is going to run this emergency receiver 24-7 off a carbon-zinc dry cell battery.  I would truly like to hear from someone who actually knows where this thing was used.
Mike, W6MAB
  ----- Original Message ----- 
  From: Al Klase 
  To: milsurplus at mailman.qth.net 
  Sent: Friday, May 17, 2013 4:25 PM
  Subject: Re: [Milsurplus] ER65


  Hi Mike,

  Radio B-batteries were generally made up of groups of 15 carbon-zinc 
  cells (3 x 5), 1.5 volts per cell.  So the "standard" voltages were 22 
  1/2, 45, 67 1/2, 90, and 135.

  Al

  On 5/17/2013 7:03 PM, Michael A. Bittner wrote:
  > I picked up this little Swedish ER65 regenerative receiver at a local swap meet.
  > https://www.dropbox.com/home/ER65
  > It is meant for monitoring the old 500 kHz emergency frequency and is well described in the RADIO MUSEUM web site.
  > -
  > My question is: What is magic about 65 Volts DC for its power source?
  > Was this a standard power source on some ships or shore stations, or did it require an external power supply?
  > -
  > Mike, W6MAB
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  -- 
  Al Klase - N3FRQ
  Jersey City, NJ
  http://www.skywaves.ar88.net/

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