Globe Scout Deluxe

[Robert Groh]

Gary Barrell just send me a series of emails and I totally buy his explanation - the wire most probably is nichrome or some other high resistance wire.  There is only about 1-1/2 turn of the 'special' wire on the 22 ohm resistor (which is obviously being used as a 'coil form' for the current shunt).  So thumbs up to Gary.

Bob, WA2CY




________________________________
From: Garey Barrell <k4oah at mindspring.com>
To: Robert Groh <rgroh at SWBELL.NET>
Sent: Friday, January 23, 2009 3:17:11 PM
Subject: Re: Globe Scout Deluxe

I don't have the "Deluxe" schematic, but the Globe Scout specifies a 56 ohm 1/2W resistor with "special resistance wire" wound on it, (R9).  A resistance of 0.3 ohms would be a VERY small gauge wire.  You would need about 8.7" of #36 copper wire for 0.3 ohms.

73, Garey - K4OAH
Glen Allen, VA

Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs
<www.k4oah.com>



Robert Groh wrote:
> I don't think that is the case here - It doesn't look like a piece of nichrome wire but I think it is just a short length of very small gauge wire. I've done that in the past (or at least looked at the idea of doing it) but the temperature coefficient is pretty poor. I might wander down to the basement later and see if I can get a decent resistance reading.  Interesting at any rate.
> 
> Bob
> 
> ------------------------------------------------------------------------
> *From:* Garey Barrell <k4oah at mindspring.com>
> *To:* Robert Groh <rgroh at SWBELL.NET>
> *Sent:* Friday, January 23, 2009 1:53:36 PM
> *Subject:* Re: Globe Scout Deluxe
> 
> I don't know about the Scout Deluxe, but I wonder if perhaps the Plate shunt wasn't just a piece of nichrome wire between two terminals?  I know Johnson did that.  Then someone came along and replaced that piece of wire with a piece of  _copper_  wire.  It "has" happened!!
> 
> 73, Garey - K4OAH
> Glen Allen, VA
> 
> Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs
> <www.k4oah.com <http://www.k4oah.com>>
> 
> 
> 
> Robert Groh wrote:
> > Just so happens I have my Scout 680A on the work bench being re-habbed.  My schematic shows the pertinent resistors as R7 (470 ohms, 10W) and R6 (0.3 ohms on my schematic). R7 runs from pin 6 of the 6146 (cathode) to a terminal strip (2 terminal).  R7 is a 'big' square 10W resistor so easy to spot and runs more or less parallel to the front panel. Then from the terminal,, there is a wire (which probably runs off to the plate/grid current switch) and a 1W (Red-red-black or 22 ohms if I remember my color code right) carbon resistor with a tinsy piece of wire sprial wound around it (the wire must be the 0.3 ohm part).  This combo runs (more or less) toward a terminal strip along the rear.  Should be easy to find.  I can take a picture with the digital camera and send it on if you need.
> >
> > 73
> > Bob, WA2CKY
> >
> >
> >
> >
> > ________________________________
> > From: Alan W. Fremmer <AWFremmer at AOL.COM <mailto:AWFremmer at AOL.COM>>
> > To: BOATANCHORS at LISTS.TEMPE.GOV <mailto:BOATANCHORS at LISTS.TEMPE.GOV>
> > Sent: Friday, January 23, 2009 12:16:36 PM
> > Subject: [BOATANCHORS-TEMPE] Globe Scout Deluxe
> >
> > Fellow Restorers/Collectors,
> >
> > I could use some help with the above mentioned transmitter.  I've  actually restored it to the point where it's putting out good power on CW and  AM.  The audio sounds good and everything seems to be working well except  for one thing.  The meter doesn't read plate current.  It reads grid  current all right.  It won't read plate current even when the meter leads  are connected to an external meter.  There is a meter shunt, R-15, 0.24  ohms which I can find on the schematic but don't know what I'm looking for  under the chassis.  I suspect that may be where the problem lies.  If  anyone can point me in the right direction it would be most appreciated.
> >
> > Thanks in advance for all your help, past and present.
> >
> > 73, Alan - KB2HEI
> >  

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