-
8/14/2019 Balum BN-4000B
1/5
308 Industrial ParkStarkville, MS 39759USA Ph : (662) 323-9538
FAX: (662)
Model BN-4000B
High Power Balun forBeams with Type SO-239
INSTRUCTION MANUALGeneral Descri tion ConstructionThe BN-4000 is
a current-type balun whoseprimary function is to provide the proper
cur-rent paths between unbalanced coaxial cableand a balanced
antenna feedpoint. The BN4000uses ferrite beads over a short length
of coaxcable to choke-off the flow of RF on the outsideof the coax
shield.
The BN-4000 uses type 77 ferrite beads on alength of RG-303
Teflon dielectric cable. The200 C rating of both the beads and the
cablealong with a very high thermally conductivepotting compound
contribute to the conserva-tively rated continuous duty cycle power
ratingof 2000 watts.
Mountin on Boom or Mast
Refer to Fi ures 1 and 2.Place U-bolt around mast or boom -
diameter1 3/8" to 2 3/8".
Place balun against mast or boom and insert theU-bolt through
the holes on the sides of thebalun.
-
8/14/2019 Balum BN-4000B
2/5
Figure 1Typical Balun Installation
Figure 2Alternate Balun Installation
Tighten all hardware securely. Connect the Connect the coax to
the receptacle on the balun.leads to the driven element. (See
Note)
-
8/14/2019 Balum BN-4000B
3/5
NOTE: Fasten the balun as close as possible tothe driven
element. Leads from the twoterminal outputs to the driven element
shouldnot exceed either 7" or existing lengths of thecoax leads.
Longer lengths will lower theresonant frequency of the antenna
system.Make sure these two wires do not touch thedriven element
bracket.If you are replacing an existing balun, youmay notice a
slight shift of the resonantfrequency. This may be offset by using
longeror shorter pigtail wires.
NOTE: Always connect the balun directly tothe driven element. In
some antennas the betamatch is connected to the driven element
withtwo insulated wires. These wires from the betamatch and the
wires from the balun shouldboth be connected to the driven element.
Whenusing this balun with the Hy-Gain TH7DX orTH5/MK2 antennas,
disre ard this note.
Figure 3
NOTE: An Ohmmeter check of the balun at alloints will show a DC
o en. This is normal.
-
8/14/2019 Balum BN-4000B
4/5
Weather roofinThe coaxial connection may beweatherproofed with
hand-moldable plasticCoax-Seal. This substance should be
appliedliberally to the connection and pushed intotight areas for
complete sealing.
Customer ServiceAll requests, inquires, warranty claims, or
for
orderin re lacement arts,
Hy-Gain308 Industrial Park Road Starkville,Mississippi 39759 USA
Phone:662-323-9538FAX: 662-323-6551
PARTS LISTPart No. Descri tion
879915 Balun Assembl
.................................................................
1879914 Parts Pack,
243S................................................................
1
540087 U-bolt, #10-24 x 2 1/2" x 2 3/4"
..................................... 1871508 Pigtail wire,
7"...................................................................
2554071 Nut, hex,
#10-24................................................................
4562961 Lockwasher, internal, 1/4"
............................................... 4500156 Bolt, hex
head, 1/4"-20 x 3/8" .........................................
2
850050
Coax-SealO........................................................................1
CAUTION:
Although the BN-4000 is conservativelyrated at 2000 watts
average power, donot exceed the maximum power ratingfor your
transmission line. For example,
RG-8 and RG-213/u coax is rated at2000 watts at 30 MHz and 3700
watts at10 MHz
CAUTION:
This substance permanently seals thecoaxial connection and is
very difficultto remove from the connector.
-
8/14/2019 Balum BN-4000B
5/5
Hy-Gain Warrants to the original owner of this product, if
manufactured by Hy-Gainand purchased from an authorized dealer or
directly from Hy-Gain to be free fromdefects in material and
workmanship for a period of 12 months for rotator products and24
months for antenna products from date of purchase provided the
following terms of this warrant 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 thevalidity 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
shallhave the discretion to deny warranty without dated
proof-of-purchase. Any evidenceof alteration, erasure, or forgery
shall be cause to void any and all warranty termsimmediately.
2. Hy-Gain agrees to repair or replace at Hy-Gains option
without charge to theoriginal owner any defective product under
warranty, provided the product isreturned postage prepaid to
Hy-Gain with a personal check, cashiers check, ormoney order for
$8.00 covering postage and handling.
3. Under no circumstances is Hy-Gain liable for consequential
damages toperson or property by the use of any Hy-Gain
products.
4. Out-of-warranty Service: Hy-Gain will repair any
out-of-warranty productprovided the unit is shipped prepaid. All
repaired units will be shipped COD tothe owner. Repair charges will
be added to the COD fee unless otherarran ements 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 ormanufacture without incurring any obligation to install
such changes upon any of the products previously manufactured.
7. All Hy-Gain roducts to be serviced in-warrant or
out-of-warrant should be
addressed to hy-gain, 308 Industrial Park Road,Mississippi
39759, USA and must be accompanied by a letter describingthe
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 whichvary from state to state.
LIMITED WARRANTY
