[ARC5] BC-453-B Power Supply

Tue Apr 4 22:47:03 EDT 2023

Do the “RECAP”  correctly, purchase Tom Frobase’s capacitor kit, believe it is kitparts or such.  Slick printed circuit boards that hold the capacitors and fit the existing holes from removing the beeswax filled leaky tubs.  Works well, and I do believe that is what Aircraft Radio would have done, had such been available.

R

From: arc5-bounces at mailman.qth.net <arc5-bounces at mailman.qth.net> On Behalf Of Dennis Monticelli
Sent: Tuesday, April 4, 2023 10:38 PM
To: hwhall at compuserve.com
Cc: arc5 at mailman.qth.net
Subject: Re: [ARC5] BC-453-B Power Supply

If you elect to not restuff the cap pots, it is easy to re-cap the set. Install a solder lug using the threaded stud that mounts the pot.  That's your ground.  Then it's typically three small caps (most are 0.05) from the lug directly to the stiff wires you cut from the cap pot terminals.

Yes, lower voltage than 250V works fairly well.  My experience is to keep it at least 60V for decent gain and sure starting of the BFO.  The lower in voltage you go the more you're going to want to short out one of the R's in the screen voltage divider to keep the gain from decreasing too much.

FYI.  My 453B pulls only10mA at 60V with new caps.  I've run it off a stack of 9V batteries and they last a long time.

Dennis AE6C

On Tue, Apr 4, 2023 at 6:57 PM <hwhall at compuserve.com <mailto:hwhall at compuserve.com> > wrote:

Those Command Set receivers had a B+ dynamotor that supplied 250v at 60 mA. Many people operate the sets on lower B+.  If these little round "flower pot" caps are the ones you're looking at, they aren't soldered shut.  The edges are bent over the mica insulators.  Most people either trash the old cap pots or carefully remove, cut them open, restuff & either glue or solder the cut edge.

Wayne 

WB4OGM

-----Original Message-----
From: Glenn Little WB4UIV <glennmaillist at bellsouth.net <mailto:glennmaillist at bellsouth.net> >
To: arc5 at mailman.qth.net <mailto:arc5 at mailman.qth.net> 
Sent: Tue, Apr 4, 2023 7:45 pm
Subject: [ARC5] BC-453-B Power Supply

I have a BC-453-B that has minimal hacks.
At a recent hamfest I found a ARN-30 solid state dynamotor replacement.
This power supply will properly mate with the receiver.
Should this supply power the receiver properly?
Some of the can capacitors along the side of the receiver are leaking.
It looks like these have a soldered on top.
Is it a lot of trouble to rebuild these capacitors?

Thanks
73
Glenn
WB4UIV

-- 
-----------------------------------------------------------------------
Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
Amateur Callsign:  WB4UIV            wb4uiv at arrl.net <mailto:wb4uiv at arrl.net>     AMSAT LM 2178
QTH:  Goose Creek, SC USA (EM92xx)  USSVI, FRA, NRA-LM    ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"

______________________________________________________________
ARC5 mailing list
Home: http://mailman.qth.net/mailman/listinfo/arc5
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:ARC5 at mailman.qth.net <mailto:ARC5 at mailman.qth.net> 

This list hosted by: http://www.qsl.net <http://www.qsl.net/> 
Please help support this email list: https://www.qsl.net/donate.html

______________________________________________________________
ARC5 mailing list
Home: http://mailman.qth.net/mailman/listinfo/arc5
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:ARC5 at mailman.qth.net <mailto:ARC5 at mailman.qth.net> 

This list hosted by: http://www.qsl.net
Please help support this email list: https://www.qsl.net/donate.html

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/arc5/attachments/20230404/0d9fe3b8/attachment-0001.html>