[ARC5] Waking up Command Receivers

[Martyn Seay]

Regarding restuffing potted caps, if you have a small lathe it is easy to carefully cut (turn) off the mica top just below the swage, replace and rewire the caps thru the original holes/terminals and resolder around the cut. The “pot” is tinned brass and solders easily. This costs nothing extra over the new caps, looks almost original and takes about 1/2 hr per pot. 
I found all the aluminium ‘tags' were corroded to a powdery grey color, and got a collection of 80 year old beeswax from somewhere in the USA!
My BC-453 receiver has logged 24 of the 30 or so remaining NDB’s around NZ on an 80 meter dipole. We also have occasional 630 meter CW activity here as well (475KHz).
Martyn ZL3CK (New Zealand)

> On 6/07/2021, at 1:26 AM, William Cromwell <wrcromwell at gmail.com> wrote:
> 
> Hi,
> 
> I have used R-23 and BC-453 receivers with 24 volt lead-acid batteries on the tube heaters and a stack of dollar store 9 volt batteries for 90 volts B+. With a modest ~100 foot wire no more than 16 feet above ground I received NDB and experimental 600 meter and 630 meter amateur stations out to about 1500 miles. I have wondered what might come my way if I had space for a *real* antenna.
> 
> Similar performance with my RAK-7.Sometimes those old radios can pull out signals the pretty commercial gear miss.
> 
> 73,
> 
> Bill KU8H
> 
> bark less - wag more
> 
> On 7/5/21 8:48 AM, Mark K3MSB wrote:
>> Alternatively, you could just use a 28V dynamotor powered off of a 24 V supply  (or build a 28V linear supply as I did).  28V Supplies are pretty cheap on Amazon (just be sure to bypass the output lines as these are switching supplies).
>> 
>> In Feb 2020, using a stock BC-453B,  I logged 68 NDBs during a weekend listening sprint with the receiver connected to my 160M INV-L antenna.
>> 
>> 73 Mark K3MSB
>> 
>> 
>> 
>> On Sat, Jul 3, 2021 at 11:19 AM Al Klase <ark at ar88.net <mailto:ark at ar88.net>> wrote:
>> 
>>    Gang,
>> 
>>    We all have these things languishing in our collections.  Here's
>>    how to use one without building up a complete system.
>>    http://www.skywaves.ar88.net/homebrew/ARC-5_PS/ARC-5_PS.html
>>    <http://www.skywaves.ar88.net/homebrew/ARC-5_PS/ARC-5_PS.html>
>>    Let me know if you have comments or corrections.
>> 
>>    73,
>>    Al
>> 
>>    --     Al Klase - N3FRQ
>>    Jersey City, NJ
>>    http://www.skywaves.ar88.net  <http://www.skywaves.ar88.net>
>> 
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