Description: Custom made cables available (240 sold so far). --IMPORTANT-- this listing is ONLY for a cable with 3 feet of RG-58 and male BNC. If you'd like this cable with different choices, see ebay item 285308037628.This cable is to connect an R-390x to an antenna. For the twinax antenna cable for the SP-600, do an ebay search for 'SP600 twinax'.-- SAVE $2 -- Request a used but excellent twinax connector instead of a new one.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. If you are using a long or medium length of coax to feed these receivers, you should use the balanced antenna connection (low impedance), and not the 'unbalanced' connection (which is for a high impedance short antenna connection). 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 the pin that goes into the right hand contact on the R390A (looking at the rear of the receiver). On the R390 and R391, it would be the top pin. The other pin connects to the coax shield and also to the connector body to provide chassis ground. The 125 ohm balanced antenna connection on these receivers is designed to work with impedances of 50 to 200 ohms without much of a mismatch. The loss is extremely small, so using a balun to overcome the imbalance would introduce more loss than without a balun. The least insertion loss available today in this type of balun would be about .5 db on the low frequency side, and up to 2.5 db on the high side. The maximum loss without a balun due to a mismatch on an R390A is about .3 db. Impedance matching in this range on a receiver is not very important.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. When you purchase this, you will receive what is pictured. I only use 'clamp style' connectors. 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 purchase more than one cable at one time or previously, all the connectors may look different, but will function correctly.The shipping price listed is for the continental 48 US States only, outside will be more.
Price: 22 USD
Location: San Jose, California
End Time: 2024-10-20T16:46:26.000Z
Shipping Cost: 4.75 USD
Product Images
Item Specifics
All returns accepted: ReturnsNotAccepted
Brand: Unbranded
Type: Coaxial RG58
Connection Split/Duplication: n/a
Connector B: BNC Male
Connector A: Amphenol Twin-Ax Plug 82-5589-RFX
Cable Length: 3ft.
Features: n/a
MPN: n/a
Output Voltage: n/a
