[ARC5] Fwd: Re: [MRCA] SCR-274-N receiver bandwidth spec

[AKLDGUY .]

> However, I would like to know if the input side of the dynamotors (mainly
> for the receivers) are Shunt or Compound wound (ie, do they have shunt or
> shunt & series fields).

The receiver dynamotors have the two fields connected in series across the
28V input terminals. Back around 1978 I disassembled one and considered
rewiring the fields in parallel to permit better operation at 12-14V. I
never got around to doing it, so can't report whether 12-14V operation was
improved or not. It would have been a very simple mod because the
interconnecting wire was readily accessible.

73 de Neil ZL1ANM


On Thu, Mar 27, 2014 at 5:23 AM, J. Forster <jfor at quikus.com> wrote:

> Not for me, as I've little interest in retuning the sets.
>
> However, I would like to know if the input side of the dynamotors (mainly
> for the receivers) are Shunt or Compound wound (ie, do they have shunt or
> shunt & series fields).
>
> The dynamotor is actually more complez than I thought originally. It has
> been pointed out to me that the armature and field are not independant, as
> assumed in most analyses. Rather, they are oupled by their mutual
> inductance.
>
> -John
>
> ============
>
>
> > On 26 Mar 2014 at 7:52, J. Forster wrote:
> >
> >> The winding data might be in the manuals somewhere?
> >
> > Yes. That winding data IS in at least one of the manuals, the Navy one. I
> > can
> > dig it out if anyone seriously needs it.
> >
> > Ken W7EKB
> >
> >
>
>
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