[Milsurplus] [MRCA] Dayton 3885 Net

[WA5CAB at cs.com]

I have a copy of the 44 page instruction book for AN/MRC-35A.  Although it 
does not show what type switch is used, how it was marked, nor where it is 
mounted, it does show the schematic of the only modification, which is the 
NET-SEND switch.  The normal BC-348 has B+ run to pin 2 and some of the 
amplifier screen grids run to pin 6 of the SO-103.  The lead to pin 6 is 
disconnect and run to one of the switch terminals.  The other switch terminal is run 
to pin 2 (B+), and the switch common is connected to the wire removed from 
SO-103 Pin 6 (screen grids).  Otherwise, the BC-348 is connected to the 
T-47/ART-13 as for AN/ARC-8.  

The manual also does not say how the receiver is marked to indicate the 
modification.  FWIW, the BC-348's modified for use with AN/MRC-20 have a new 
nameplate.  The modification there is much more extensive, being the addition 
of a squelch and noise-limiter circuit to all use of the system as a VHF or 
UHF to HF repeater.

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480

In a message dated 05/29/2016 18:15:26 PM Central Daylight Time, 
kargo_cult at msn.com writes: 
> It may be, then, that the BC-348/ MRC-35A is the rarest of the BC-348
> variants. I certainly have not seen a BC-348 with a NET/ SEND switch
> installed.
> i wonder how the panel was lettered for this switch.
> I suppose the few that did get into private hands, the new owner thought,
> "Now who did this useless mod ? "
> -Hue 
> 
> 
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