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QRZ! Ham Radio 7
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1994-11-26
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4KB
Date: Mon, 16 Aug 93 13:21:54 EDT
From: jps@Kodak.COM (John Spoonhower)
Message-Id: <9308161721.AA05613@apt07.kodak.com>
To: QRP@Think.COM
Subject: review of Tejas-II backpacker
I picked this up from packet over the weekend.....thought some of you
might be interested.
John, KC2DU
MSG#68 08/14/93 13:08:43 FROM K7YHA TO QRP
SUBJECT: Tejas Backpacker II-Review
The following are my observations and comments regarding the
Tejas RF Technologies new Backpacker-II QRP transceiver. My
review rig was a factory assembled 30 meter transceiver that
Bill Hickox, K5BDZ, sent me. The new rig differes slightly from
it's predecessor the BP-I. The demensions are slightly larger
(by 1/2 inch in width and depth) and a Mini-Circuit Labs TUF-1
mixer was used in place of the SBL-1. Bill re-worked the
intermediate stages to redistribute gain to avoid feedback
problems encountered by some builders of the BP-I. An LM380N-8
audio IC replaced the original LM386 in the BP-I to provide much
more AF gain. Tejas offers the BP-II in kit for only for 40, 30,
20, 17 and 15 meters. The new manual is MUCH better than the
manual that came with my BP-I. This is not a beginner's kit, so
beware! The kit conforms to the guidlines setforth by the QRP
ARCI on homebrew gear. The less experienced builder should have
no major problems IF HE/SHE PAYS ATTENTION TO DETAILS AND TAKES
TIME TO READ AND RE-READ THE INSTRUCTIONS CAREFULLY. The bigger
cabinet offers more room for options and accessories like keyers,
SWR/P circuitry, etc. The cabinet is the same nice looking
anodized aluminum with crisp black silkscreened lettering. Front
panel layout is well thought out and not cluttered. The design
of the rig is sound and duplicatable results are obtained between
radio indicating that Bill did his homework on the R&D end. The
rig worked well and, when compared to my Argosy-II could hear
everything that the Ten-Tec rig could hear. The BP-II is a direct
conversion RX and, once proper Zero Beating techniques are learned,
proves to be a breeze to tune. The BP-II suffered no AM breakthrough
(and with WBAX only 1/4 mile away from me, AM breakthrough is a
problem at K7YHA). The design is "bullet proof" and plays well. The
dual stage CW filter provides 180 Hz and 110 Hz bandpass,
respectively. Wide open the receiver passband is about 2.7 kHz wide.
I could detect no difference in RX performance between the BP-I and
BP-II. The TX put out 1.9 watts into my calibrated dummy load and
provided some good DX on 30 meters using the Carolina Windom. TX
waveform was clean with no tendency to click or chirp. QSK was as
good as the Argosy. No thumps or pops were heard at 20+ These
single band rigs are a great idea for the traveling QRPer. My review
rig drew only 23 mA on RX and about 300 mA on TX. A single 4.5 Amp
Hr gell cell can run this rig for an entire weekend of DXing with no
problems. This little radio comes as a complete kit with everything
except the battery, antenna and key provided. It's nice styling an
size make it a very good choice for the active QRPer.
Price is $159.95 plus shipping from Tejas RF Technology,
P.O. Box 720331, Houston, TX 77272-0331
(713) 879-9300 or FAX (713) 879-9494.
======================================================================
Date: Mon, 16 Aug 1993 13:29:32 -0500 (CDT)
From: "Jeff M. Gold" <JMG@tntech.edu>
Subject: Texas II
To: qrp@Think.COM
Well,
the review sounded great.. after building and testing many a
QRP.. you better bet your bottom dollar I WOULD NOT spen
$160 for a DC receiver. There are a bunch of good Superhets
available for that price.
Wonder if Chuck ever got his version I going. As far as a
remember it was the only kit I can recall him saying didn't
work.
BEWARE DC receiver. I had a great time with mine.. it is a
big challenge compared to a Superhet to use.
72
Jeff