Hello Roger,
Hi Roger I bought one of the first 432-16LBX from Mike Stahl in about 1975 when
living in the SF Bay Area and operating as W6BXO. It was one of the first
commercial yagis for 432 with measurable high gain before the later NBS, K1FO
etc. computer designed configurations. I was very pleased with based on its
rugged large diameter elements and good match based on the Oliver Swan 3
driven element design. It performed well for me through 1991 when replaced with
a CC Boomer fo that band. I have the original assembly instructions but they do
not give any performance specs that you wanted. It is as you noted 16 elements
on a 12' boom.
I am currently using the Directive Systems DSE FO 432-15RS which is performing
very well and based on its proven design likely has some more gain that the
432-16BLX Whether enough more to really notice is always the difficult
question to answer.
I am also using a Antennas-Amplifiers 1,296 MHz 4' boom yagi which is
performing better that a previous loop yage. The design and craftsmanship is
impressive. believe both this and the Directive System antennas are more for
your money than the current M2 antennas which have become quite pricey.
Hope this helps,
Merle W7YOZ
----- Original Message -----
From: "Roger(WA1NVC) Coulson" <wa1nvc@gmail.com>
To: "vhfcontesting" <vhfcontesting@contesting.com>
Sent: Tuesday, September 14, 2021 11:27:14 AM
Subject: [VHFcontesting] KLM 432 Antenna Details wanted
Folks:
Does anyone have information on this old 432 beam I have been using for
years?
It is a KLM 432-16LBX ??? or something like that.
I can't find the specs or find any literature on it.instt
KLM 432-16LBX???
16 elements (3 driven)
??.? dBd gain
120" (10' 0") approximate boom
20 degree??? beamwidth
NLA
There are 16 elements but three of them make up the driven element so it
is the equivalent of a 14 element beam.
I remember the bandwidth was 432-436 MHz or similar unlike their log
periodic antennas with a bandwidth of 420-450 MHz.
The element spacing is wide and there is a KLM sleeve balun for the
three driven elements.
Does anyone have the details/comments on the KLM?
I was thinking of replacing it with an M2 440-18X or Antennas-Amplifiers
PA432-14-3B.
M2 Antennas
440-18x
18 elements
14.3 dBd gain
135"(11' 3") boom
27 degree beamwidth
$260
Comments on the M2?
Antennas-Amplifiers
PA432-14-3B
14 elements
14.0 dBd gain
114" (9' 6") boom
30 degree beamwidth
$125e (~$207 delivered)
Comments on the Antennas-Amplifiers?
Maybe compare to DSE FO432-15RS?
Directive Systems
DSEFO432-15RS
15 elements
13.5 dBd gain
96"(8' 0") boom
30 degree beamwidth
$229 + shipping
Roger
WA1NVC
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