R390A R390 R391 Bal Antenna Ratio Alignment Adapter, TwinAx, Cable & BNC/choice.

Description

This is NOT to connect an antenna to the R-390x.  This is ONLY used to align the balanced input ratio of the R-390x antenna input circuit.  Custom made cable available
(4 sold so far)
.  Send me an e-mail first, if you'd like something other than the one pictured and described below.
For the cable to connect an antenna coax to the R-390x balanced twinax connector, see
eBay item:
274411082718.
The connector cable shown is specifically made for the R390A, R391, and R390 Balanced Twin-Ax antenna jack connector with 2 female contacts on the receiver.  I have constructed this cable to use the Twin-Ax connector using an amphenol Twin-Ax Plug, 82-5589-RFX or an AIM 27-9080 (they are the same as UG-421), by connecting the coax center conductor to two 62 ohm resistors and the other end of the resistors to each pin of the connector.  This is what is specified in the Tech Manuals for the 'Antenna Balance Ratio Test' and adjustment.
The adjustment procedure is in TM-11-856A dated 1/20/1956 on page 172 paragraph 164 step h.
I will connect a 'clamp style' male BNC connector on the other end of the 'clamp style' Twin-Ax Plug using 35" of high quality RG-58/U with copper wire core and copper braided shield.  If you purchase this without sending me a customizing e-mail first, this is what you will receive.  I only use 'clamp style'  connectors, unless requested otherwise. Since the connector is not 'crimped' and the shield not soldered, they are easily changed or reused.  They do however cost a little more (which is included).  If you would like a custom cable, your choices would normally be, but are not limited to:
1. No connector on the other end - save
2. A different length of coax - {{detail_product_description}}.50 per foot
3. A different connector on the other end: UHF male PL-259 (add ),
UHF female SO-239 (add ),
Type N male (add ), BNC female (add {{detail_product_description}}),
RCA
male (all metal, add ),
other (ask).
If you order a custom cable, I will need to send you information for the difference in the charges.  So, after I respond to your e-mail request with that information, you will receive an 'e-bay offer' from me, showing the adjusted price.  If it is correct, accept the offer and pay for it.
The shipping price listed is for the continental 48 US States only, outside will be more.