[ARC5] Antenna coupler used with APN-9?

[WA5CAB at cs.com]

I once had several NOSB CU-92/APN but sold the last one in 2012.  
Unfortunately, I never opened up the can of any of them.  SIG 5 says that the coupler 
is as previously stated used with AN/APN-4 and AN/APN-9.  And describes the 
circuit as coil assembly 60-240 uH with 110 mmf capacitor in series.

The paper packaged with one that I had was AN 16-35CU92-2 which I did scan 
and clean up before I sold the last unit.  However, this is the Operating 
Instructions and includes no schematic.  Tuning instructions say to attach 
antenna lead from antenna or from T/R relay, AUX RCVR to BC-348 and coax to 
Loran receiver.  If there is no BC-348 (or other) receiver, AUX RCVR post must 
be grounded.  Couple modulated signal generator with one turn of insulated 
wire around antenna lead.  Remove hole plug from top of box and and with 
LORAN receiver set to Channel 2, adjust tuning screw in CU-92 for maximum 
display height on CRT.  Then peak up Channel 2 antenna trimmer capacitor in LORAN 
receiver.  Return plug to hole in top of CU-92 and then readjust antenna 
trimmer capacitors for remaining channels in LORAN receiver.

Unfortunately, the AN does not include a schematic or I would send it to 
whomever wanted it.  Hard copy of AN available for $3.50 plus postage.  If 
there was ever a -3, I don't have it.

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

In a message dated 12/29/2016 15:53:16 PM Central Standard Time, 
aaf-radio-1 at aafradio.org writes: 
> 
> It's a CU-92/APN, Mike.  I have a couple of NIB that have the schematic 
> sheet inside, but I couldn't find them in a quick sweep of the shack.  The 
> boxes make nice housings for a transition from 50 ohm distribution to a push 
> post device in the shack.
> 
> 73,
> Mike  KC4TOS
> 
> On 12/29/2016 4:23 PM, Mike Everette via ARC5 wrote:
> 
> >> Does anyone know the number of the little antenna coupler box used with 
>> the APN-9 LORAN receiver?  I think its purpose was to connect the APN-9 
>> to the same antenna as used by the liaison receiver (BC-348, ARR-15 or 
>> ARR-41 perhaps).  It has an SO-239 receptacle and push posts for the antenna 
>> (and one of the receivers).
>>  
>> 
>> What is the circuit of this unit?  Does it match the wire antenna to 50 
>> ohms somehow for the LORAN set?
>>  
>> 
>> I have one of these with the nomenclature removed, so even though I know 
>> what it is, it's still a whatzit... wanted to maybe use it to connect a 
>> BC-348 to an antenna using a 50-ohm electronic TR switch, either with the 
>> coupler as-is or modified as necessary.  Anyone have an e-mailable diagram 
>> and perhaps the specs for the coupler?
>> 
>> 
>> 
> 
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