[Milsurplus] ARB Antenna capacitor

[J. Forster]

In looking at the print, there are two antenna terminals that are
connected together via a parallel RC. The receiver input is single ended.
So, it appears that the external C parallels the internal RC network.

I'd look at the theory section of the manual, which I son't have to hand,
but I'm guessing it has to do with the aircraft antenna being Hi-Z and the
added cap improves the reception when driven from a 50 Ohm ham antenna.
Just a guess.

I do not another thing. On the loop input, one side goes to ground, rather
than the loop input being balanced as I'd expect. This partially negateds
the purpose of a loop- good Common Mode Rejection. This puzzles me.

FWIW,

-John

===================
> http://www.ebay.com/itm/WW-II-NAVY-AIRCRAFT-RADIO-RECEIVER-TYPE-CRV-46151-HAM-RADIO/251398161407?_trksid=p2045573.m2102&_trkparms=aid%3D555012%26algo%3DPW.MBE%26ao%3D1%26asc%3D298%26meid%3D3260273197038747044%26pid%3D100034%26prg%3D1079%26rk%3D5%26rkt%3D8%26sd%3D141043077207%26
>
>
> or by item title:  WW II NAVY AIRCRAFT RADIO RECEIVER TYPE CRV-46151 HAM
> RADIO
>
> or by item number  251398161407
>
> Which is fair condition ARB with local tuning crank, with spinner post
> broken off.
> But what interests me is the large mica cap attached where the antenna
> connector
> should be.
> In  the past I have seen one out here on the opposite coast with exactly
> the same
> type capacitor in the same position. So was this in place merely to
> replace a broken-off
> antenna connector, or is there some more arcane purpose to it?
> -Hue Miller
>
>
>
>
>
>
>
>
>
>
>
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>