[ARC5] Is guess this for an RU?

[jcoward5452 at aol.com]

I believe the RU/GF sets were widely used in the F4F Wildcat.
Jay






-----Original Message-----
From: Mike Morrow <kk5f at earthlink.net>
To: arc5 <arc5 at mailman.qth.net>
Sent: Fri, Jun 3, 2011 6:41 pm
Subject: Re: [ARC5] Is guess this for an RU?


Wayne wrote:
>Reference item 230628177737
The auction dose not tell you what frequencies are covered by this dual
oil set, but:
ange Q is 530 to 830 kHz, and
ange F is 2040 to 3000 kHz.
Why the odd band 530 to 830 kHz?  That was to enable the receiver to
witch from the MF/HF communications mode to the ZB/YE homing system mode
ithout swapping coils.  The output of the ZB homing adapter was in that
ange of broadcast band frequencies.
The RU-18 was a liaison receiver that always had a radio operator nearby,
ne who wouldn't be normally interested in ZB/YE homing activities.  But
he same coil set was part of the RU-16/GF-11 and RU-17/GF-12 command sets,
here the receiver was remote tuned and normally not accessible to the pilot
or coil swaps.  A dual-band coil set like that shown in the auction, remotely
witched through a spline, allowed the RU-16/17 to provide communications
nd homing service.  Of course, there were likely very few RU-16/GF-11
ircraft installations, and not all that many RU-17/GF-12 installations
ither.
> Interesting to note that the coil cans look so much like the ones in a 274-N.
I guess we all see different things.  I see almost no similarities between
U coil sets and those used by ARA, SCR-274-N, and AN/ARC-5 receivers.
Mike / KK5F
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