Instruction Manual: Model BN-86

Model BN-86
308 Industrial Park Road

3-30 MHz 1500W 50-ohm
Starkville, MS 39759 USA
Current Balun
Ph: (662) 323-9538 FAX: (662) 323-6551
INSTRUCTION MANUAL
General Description CAUTION
This balun is a ferrite, balanced to unbalanced, an-
tenna matching device. With a transformation ratio DO NOT use this balun with any type of
of 1:1, the balun will couple into any 50 ohm antenna tuner or match box when the VSWR
balanced system such as dipoles, multiband (before matching) is greater than 3:1. If the
doublets and beam antennas. VSWR is below 3:1, a match box can be used
as long as the power levels are kept below the
This balun is supplied with stainless steel hardware limits shown in the Specifications. When
except for eyebolts. these power and VSWR limits are exceeded,
the extremely high standing wave voltage
For higher power and higher VSWR, use the Hy- present at the feedpoint causes the breakdown
Gain BN-4000 current-type balun rated at 2000 voltage of the balun to be exceeded.
watts ave., 4000 watts PEP
Mounting on Boom or Mast

Place balun against mast or boom and insert the U-
Refer to Figures 1 and 2.
bolt through the holes on the sides of the balun.
Place U-bolt around mast or boom - diameter 1

3/8" to 2 3/8". Cycolac is a registered trademark of Borg-Warner
Figure 1
Typical Balun Installation
Figure 2
Alternate Balun Installation
Tighten all hardware securely. Connect the leads Connect the coax to the receptacle on the balun.
to the driven element. (See Note)
NOTE: Fasten the balun as close as possible to
the driven element. Leads from the two Mounting on a Doublet System
terminal outputs to the driven element should
Refer to Figures 3 and 4.
not exceed either 7" or existing lengths of the
coax leads. Longer lengths will lower the Insert two eyebolts in brass fittings at top of
resonant frequency of the antenna system. balun.
Make sure these two wires do not touch the
driven element bracket. Hook doublet wires to eyebolts (the balun
NOTE: Always connect the balun directly to replaces the insulator completely).
the driven element. In some antennas the beta Connect coax to receptacle on balun.
match is connected to the driven element with
two insulated wires. These wires from the beta
match and the wires from the balun should both
be connected to the driven element. When
using this balun with the Hy-Gain TH7DX or
TH5/MK2 antennas, disregard this note.
Figure 3
Dipole, Doublet or inverted "V" Antenna Arrangement
Figure 4
Typical Doublet Antenna Arrangement
Weatherproofing Customer Service

The coaxial connection may be weatherproofed If you are unable to resolve your problem or if you
with hand-moldable plastic Coax-Seal®. This need to order replacement parts, you should contact
substance should be applied liberally to the con- the Hy-Gain Customer Service Department.
nection and pushed into tight areas for complete
sealing. All requests, inquires, warranty claims, or
for ordering replacement parts, contact:
CAUTION
Hv-Gain
This substance permanently seals the coaxial 308 Industrial Park Road Starkville,
connection and is very difficult to remove Mississippi 39759 USA Phone:
from the connector. 662-323-9538
FAX: 662-323-6551
PARTS LIST
Part No. Description Qty
873424 Balun Assembly ....................................................................................................1
872079 Parts Pack, 242S ....................................................................................................1
540087 U-bolt, #10-24 x 2 1/2" x 2 3/4" stainless steel ..................................................1
540066 Eyebolt, 1/4" x 1 1/2" ...............................................................'.............................2
554099 Nut, hex, 1/4"-20 ...................................................................................................4
554071 Nut, hex, #10-24 ...................................................................................................2
562961 Lockwasher, internal, 1/4" ...................................................................................5
500156 Bolt, hex head, 1/4"-20 x 3/8" ..............................................................................2
850050 Coax-Seal® ...........................................................................................................1
Coax-Seal® is a registered trademark of Universal Electronics, Inc.
LIMITED WARRANTY
Hy-Gain Warrants to the original owner of this product, if manufactured by Hy-Gain

and purchased from an authorized dealer or directly from Hy-Gain to be free from
defects in material and workmanship for a period of 12 months for rotator products and
24 months for antenna products from date of purchase provided the following terms of
this warranty are satisfied.
1. The purchaser must retain the dated proof-of-purchase (bill of sale, canceled check,
credit card or money order receipt, etc.) describing the product to establish the
validity of the warranty claim and submit the original or machine reproduction of
such proof of-purchase to Hy-Gain at the time of warranty service. Hy-Gain shall
have the discretion to deny warranty without dated proof-of-purchase. Any evidence
of alteration, erasure, or forgery shall be cause to void any and all warranty terms
immediately.
2. Hy-Gain agrees to repair or replace at Hy-Gain’s option without charge to the

original owner any defective product under warranty, provided the product is
returned postage prepaid to Hy-Gain with a personal check, cashiers check, or
money order for $8.00 covering postage and handling.
3. Under no circumstances is Hy-Gain liable for consequential damages to

person or property by the use of any Hy-Gain products.
4. Out-of-warranty Service: Hy-Gain will repair any out-of-warranty product

provided the unit is shipped prepaid. All repaired units will be shipped COD to
the owner. Repair charges will be added to the COD fee unless other
arrangements are made.
5. This warranty is given in lieu of any other warranty expressed or implied.
6. Hy-Gain reserves the right to make changes or improvements in design or

manufacture without incurring any obligation to install such changes upon any of
the products previously manufactured.
7. All Hy-Gain products to be serviced in-warranty or out-of-warranty should be

addressed to hy-gain,
308 Industrial Park Road,
Mississippi 39759, USA and must be accompanied by a letter describing
the problem in detail along with a copy of your dated proof-of-purchase.
8. This warranty gives you specific rights, and you may also have other rights which
vary from state to state.

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Model BN-86

308 Industrial Park Road

Mounting on Boom or Mast

Place U-bolt around mast or boom - diameter 1

Weatherproofing Customer Service

Hy-Gain Warrants to the original owner of this product, if manufactured by Hy-Gain

2. Hy-Gain agrees to repair or replace at Hy-Gain’s option without charge to the

3. Under no circumstances is Hy-Gain liable for consequential damages to

4. Out-of-warranty Service: Hy-Gain will repair any out-of-warranty product

6. Hy-Gain reserves the right to make changes or improvements in design or

7. All Hy-Gain products to be serviced in-warranty or out-of-warranty should be

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