[Milsurplus] Marine use of airborne radios

[George Babits]

Yes, that is correct.  Land Rover didn't go to negative ground until 1967. 
Fords until the mid-1950s were also positive ground.

73,
George
W7HDL


----- Original Message ----- 
From: "AKLDGUY ." <neilb0627 at gmail.com>
To: "Tom Brent" <navyradiocom at gmail.com>; "milsurplus" 
<milsurplus at mailman.qth.net>
Sent: Sunday, November 26, 2017 4:41 PM
Subject: Re: [Milsurplus] Marine use of airborne radios


> Not sure whether this is relevant, but I think all British cars up to at
> least
> the 1960s had positive ground systems. The ones I owned certainly did.
>
> Neil ZL1ANM
>
> On 27/11/2017 11:23 AM, "Tom Brent" <navyradiocom at gmail.com> wrote:
>
> I too found the "positive ground" notation curious but it is clearly 
> stated
> in the Bendix manual and for them to build a model of the MN-26
> specifically for marine positive ground use indicates there were at least 
> a
> few such systems around.
>
> To expand on Mike's list, I am aware of 11 models of the MN-26 and 
> wouldn't
> be surprised if there were more:
>
> MN-26*A*, MN-26*C, *MN-26*CA*: 150-325  325-695  695-1500KHz
>
> MN-26*J*, MN26*K*, MN-26*W*, MN-26*X*:  200-410  410-850  850-1750KHz
>
> MN-26*L*, MN-26*LB*: 200-410  550-1200KHz   2.9-6.0MHz
>
> MN-26*M*: 200-410  410-850KHz  3.4-7.0MHz
>
> MN-26*Y*: 150-325  325-695KHz  3.4-7.0MHz
>
> To overcome the shortcomings of manual manual direction finding Bendix 
> came
> out with the MN-31 loop control (1942?). It was a separate box that, when
> coupled with a "standard" MN-26 receiver and a different loop antenna
> (MN-36), azimuth indicator (MN-37) and control box (MN-28) would turn the
> system into an automatic DF.
>
> TB
> ._._.
>
>
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