[Boatanchors] [Heathkit] DX-35 meter

[Bob Macklin]

If you decide to use a good 1ma meter just use the same shunt values shown
in the DX-40 schematic.

Bob
K5MYJ
----- Original Message ----- 
From: "Sandy" <ebjr37 at charter.net>
To: "Bob Macklin" <macklinbob at msn.com>; <k4oah at mindspring.com>; "Heathkit
Reflector" <heathkit at mailman.qth.net>; <boatanchors at mailman.qth.net>
Sent: Wednesday, March 04, 2009 5:45 PM
Subject: Re: [Heathkit] DX-35 meter


> Better be prepared to shange the meter shunts as well!  The DX-40 meter
> WOULD be more "civilized"!  The AT-1 also had one of those "jumping" iron
> vane meters.  The Triplett and Simpson iron vane movements were at least
> damped.  The Surite meters were cheap crap!  They were only a dollar
though.
> Some models less than a dollar.
>
> 73,
>
> Sandy W5TVW
>
> ----- Original Message ----- 
> From: "Bob Macklin" <macklinbob at msn.com>
> To: <k4oah at mindspring.com>; "Heathkit Reflector"
<heathkit at mailman.qth.net>;
> <boatanchors at mailman.qth.net>
> Sent: Wednesday, March 04, 2009 5:37 PM
> Subject: Re: [Heathkit] DX-35 meter
>
>
> I screwed up and looked at the DX-40 meter.
>
> The DX-35 does show a 3ma/500 ohm meter. Part number is 407-33.
>
> If it were my unit I would change the meter circuit to the DX-40 version.
> It's a better meter.
>
> Bob
> K5MYJ
> ----- Original Message ----- 
> From: "Garey Barrell" <k4oah at mindspring.com>
> To: "Heathkit Reflector" <heathkit at mailman.qth.net>;
> <boatanchors at mailman.qth.net>
> Sent: Wednesday, March 04, 2009 3:32 PM
> Subject: Re: [Heathkit] DX-35 meter
>
>
> The DX-35 meter was a Shurite brand "moving vane" type of meter.  These
> were the bouncing betty style that took so long to settle after moving
> it made it almost impossible to accurately dip a final.  I suspect this
> had more than a little to do with the supposed failure-prone power
> transformer!  Typically these meters had relatively low internal
> resistances.
>
> The DX-40 had a D'Arsonval "moving coil" meter that was much more
> civilized!  :-)
>
> Techniques for measuring the internal resistance of meters is covered in
> just about any ARRL Handbook.  For a three mA movement, you could just
> measure it with a good quality DMM as these put VERY little current
> through whatever resistance is being measured, typically in the uA range.
>
> 73, Garey - K4OAH
> Glen Allen, VA
>
> Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs
> <www.k4oah.com>
>
>
>
> Tom Chesek wrote:
> > ...but the meter for the DX-40 is a part number 407-46. The original
> > question referenced part number 407-33 which is what the assembly manual
> > calls for.
> >
> > Tom K3TVC
> >
> > .
> > ----- Original Message ----- 
> > From: "Bob Macklin" <macklinbob at msn.com>
> > To: "Tom Chesek" <tchesek at epix.net>; "WØQFC" <erastber at tampabay.rr.com>;
> > "heathkit" <heathkit at mailman.qth.net>; <boatanchors at mailman.qth.net>
> > Sent: Wednesday, March 04, 2009 5:59 PM
> > Subject: Re: [Heathkit] DX-35 meter
> >
> >
> >
> >> The schematic shows a 1ma/100ohm meter on the DX-40.
> >>
> >> Bob Macklin
> >> K5MYJ
> >> Kent (Seattle), Wa,
> >> "Real Radios Glow in the Dark"
> >>
> >> ----- Original Message ----- 
> >> From: "Tom Chesek" <tchesek at epix.net>
> >> To: "WXQFC" <erastber at tampabay.rr.com>; "heathkit"
> >> <heathkit at mailman.qth.net>; <FLBOATANCHORS at yahoogroups.com>;
> >> <boatanchors at mailman.qth.net>
> >> Sent: Wednesday, March 04, 2009 2:33 PM
> >> Subject: Re: [Heathkit] DX-35 meter
> >>
> >>
> >> The 1984 Master Parts file lists it as a 3 milliamp DC meter. The
listing
> >> does not give a resistance value.
> >>
> >> Tom K3TVC
> >>
> >>
> >> ----- Original Message ----- 
> >> From: "WXQFC" <erastber at tampabay.rr.com>
> >> To: "heathkit" <heathkit at mailman.qth.net>;
> >> <FLBOATANCHORS at yahoogroups.com>;
> >> <boatanchors at mailman.qth.net>
> >> Sent: Wednesday, March 04, 2009 4:09 PM
> >> Subject: [Heathkit] DX-35 meter
> >>
> >>
> >> Does any one know the internal resistance of the DX-35 meter p/n
407-33?
> >>
> >> TIA
> >> Gene, WXQFC
> >>
> >
>
>
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