[ARC5] [armyradios] BC-221 Coupling

[Mike Everette]

I meant to send this to the entire list.

73

Mike 
W4DSE



> From: Mike Everette <radiocompass at yahoo.com>
> Subject: Re: [ARC5] [armyradios] BC-221 Coupling
> To: wrcromwell at gmail.com
> Date: Wednesday, November 14, 2012, 9:36 PM
> If anyone has the male chassis power
> connector for an LM, I'd love to have one... I have an LM-4
> with a 1939 contract date (this may have been the first
> version deployed to the fleet) that somebody took the
> connector from and haywired a power cord directly into the
> unit.  I'd like to restore it.
> 
> This is of course the same connector found on the ARB front
> panel, or the Command Set adapter boxes which have a
> connector to plug in an ARR-1 homing device (or DU-1
> loop?).
> 
> Parts donors....?
> 
> The visual difference between the LM-4 and later models is
> that the main dial's center has a slight "conical" shape to
> it, vs flat on the subsequent versions.
> 
> 73
> 
> Mike
> W4DSE
> 
> --- On Wed, 11/14/12, Bill Cromwell <wrcromwell at gmail.com>
> wrote:
> 
> > From: Bill Cromwell <wrcromwell at gmail.com>
> > Subject: Re: [ARC5] [armyradios] BC-221 Coupling
> > To: "Jay Coward" <jcoward5452 at aol.com>
> > Cc: ARC5 at mailman.QTH.net,
> armyradios at yahoogroups.com,
> Milsurplus at mailman.QTH.net
> > Date: Wednesday, November 14, 2012, 9:00 PM
> > On Wed, 2012-11-14 at 20:21 -0500,
> > Jay Coward wrote:
> > > 
> > >  But then if you have one that has no cal book
> > and  you can "cal" it
> > >  against another with a cal book for the
> > frequencies  of interest then
> > >  maybe you might find that as a useful
> > experimenting  platform.    I've
> > >  always thought the LM could make a really hot
> > regen  rx with the
> > >  proper mods. When the 80 and 40 bands are long
> > and quiet  I've hooked
> > >  the long wire to the LM and had very good clear
> > copy,  although low
> > >  audio.  Jay 
> > 
> > Hi Jay,
> > 
> > A missing cal book is no reason to chop a LM or 221. A
> new
> > cal book can
> > be made fairly easily with the help of a spread sheet
> and a
> > couple of
> > cups of coffee. A new cal book could be made before
> that. In
> > fact the
> > originals were made with a personal computer to help.
> If
> > they could do
> > it in the 1930s it can probably still be done.
> > 
> > There are some fellows who built regens and direct
> > conversion receivers
> > based on an old LM or 221. The way you described using
> yours
> > was about
> > the same as a DC receiver but not optimized for that.
> > 
> > My heterodyne frequency meters shall remain on duty as
> > heterodyne
> > frequency meters until my heirs deal with them some
> day. I
> > have looked
> > for LMs and 221s that are "beyond repair" to use for
> parts
> > in other
> > projects. I haven't found any that can't be repaired.
> > Anybody? That's a
> > challenge. Send your "beyond repair" LM or 221 here
> for
> > 'burial'.
> > 
> > 73,
> > 
> > Bill  KU8H
> > 
> >
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