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DJ7ST > QRP 19.07.02 20:34l 119 Lines 5765 Bytes #999 (0) @ EU
BID : GZGPXMDB0ABZ
Read: DB0FHN GUEST
Subj: Results 3rd QRP-MINIMAL ART-SESSION
Path: DB0FHN<DB0ZWI<DB0HOT<DB0ERF<DB0ABZ
Sent: 020718/2103z @:DB0ABZ.#NDS.DEU.EU [Salzgitter JO52FD] DP6.00 $:GZGPXMDB0A
From: DJ7ST @ DB0ABZ.#NDS.DEU.EU (Hartmut)
To: QRP @ EU
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wThe QRP-CONTEST-Community (qrpcc) 23-June-2002
c/o Dr. Hartmut Weber, DJ7ST
Schlesierweg 13,
D-38228 SALZGITTER
Germany
Dear QRP-friends,
the QRP-CONTEST-COMMUNITY presents the
Results of 3rd QRP - MINIMAL ART - SESSION (9-May-02)
=====================================================
CALL PTS COMP QSO EQUIPMENT
CLASS A TX+RX or TRX < 100 components
------- -----------------------------
1 DL7FZ 153,36 A58 30 QSK-TRCVR, IF 12 MHz (3 xtal), 4W, own design
2 DL1ARH 91,80 A92 25 HB TRCVR: SH (DG-MOSFETS); PA BD228; 2W
3 HB9XY 79,79 A99 22 "The 99er": VXO-BU-DR-PA (2SC2166); DC-RX
4 DL1JGA 66,30 A97 17 VFO-PA, 800mW; DC-RX
5 OZ9KC 49,92 A96 12 VFO-BU-DR-PA; DC-RX (own design); 1,4 W
6 DL6KWN 26,45 A85 8 VFO-BU-DR-PA, 4.5W; DC-RX (RF-ampl.,select. AF)
7 DL8LRZ 15,48 A28 3 VXO-PA; DC-RX (Pixie-design)
CLASS B TX < 50 components
------- ------------------
1 DJ9IE 169,28 B8 29 CO-solo (BSY51)(Amateur Radio Techn., p.214)
2 DJ1ZB 164,04 B14 27 VRO-PA; 4w at 15V
3 DL2BXC 161,50 B15 26 VXO-PA (BF245-KT910A); 2,5W
4 DM3XI 142,68 B18 24 VRO-PA (2N2222); 250mW
5 OK1DXK 114,80 B19 19 VXO-PA (BF245-BSY34) (OK QRP INFO 43/44, p10)
6 DJ2GL 113,16 B18 18 ECO-SOLO (RS289); DASD Standard 1937
7 I1BAY 104,00 B20 20 ECO-PA (6C4-EL84), built 1948 (his first!)
8 OK1DLY 96,00 B20 18 VFO-PA (6K3, USSR-type); 1.1W
9 DL9QM 93,80 B30 19 VFO-PA (6SG7-6AR6); 9W input
10 DL8GN 93,48 B18 15 VXO 'ugly style'(from 'QRP-Power', p3-50)
11 DK0VLP 93,28 B12 14 "Piccolino" npn-version (BD106)(SPRAT 42, p.7)
12 DL1AZK 90,20 B18 16 CO-PA (2N2222-2N2219); 3W input
13 DL9GWA 89,04 B16 14 CO-PA; 2W/24V
14 OE8GBK 72,00 B25 15 VXO-PA (PCL 805; SM5GNN des.); 10W in at /200V
15 DJ6FO 68,44 B41 16 The Oner VFO + The JBS Transmitter (GM3OXX); 2W
16 DK0SZ 68,32 B44 16 TX80/1 (Hari); PA 2N2219, 900mW
17 YU7SF 67,24 B18 11 ECO-solo (1 tube)
18 DL7GW 54,90 B39 12 VFO-DR-PA (KP303-SF137-2xSF129C); 1W
19 ON4ADR 51,00 B49 14 VFO+AMPL. (Pract.Wireless Jan/Feb 1990)
20 LZ1IQ 38,48 B48 10 VXO/MXR-DR-DR-PA (KT904A)(circuit via FM WWW)
21 DK9KR 38,00 B24 7 VXO-PA (2N2222A); 0,9W input
22 DJ7ST 31,20 B22 5 VXO-PA (EF13-EF14); 400mW
23 DL3BCU 28,80 B28 5 VXO-BU-PA (BD137); 1W
24 PA3AFF 27,88 B18 5 CO-PA (BUZ 21): 3W (Design: PA0FSB)
25 DL9ZBN 26,25 B22 5 'OXO', ugly style (GM3OXX)
26 DJ1YFK 12,64 B21 2 Pixie (SM7UCZ), TX only: XO-PA (2N2222)
27 M0AVN 10,88 B32 2 VXO-BU/AMP-EmFoll-PA (VN10KM)
CH DL2AWA CH B48 14 ????????????????????
- - - - - - - - - - -
The Manager's Voice (tks to Eddi, DK3UZ, for translation)
-------------------
"A QRPer never gives up!" (HB9XY) wasn't only a brave but in the end also
a profitable motto as far as our 3rd QRP-MAS was concerned. It would have to
be the QRP-minimalists and their (often) only milliwatts, who initially had
to cope with year's first serious QRN. Lots of initiative got "hashed" down,
some quit in frustration. Those who persevered finally enjoyed a pleasant
remaining Session when the QRN waned after about 2100utc. In such a QRN-
emergency a small PA built from a few components may come in useful after
all. 5w could wrest a few more QSOs from the din than just 0.5w. And a "B22"
tx would earn only 8% less bonus points than a "B18".
The winners' name is Uli. In both categories.
Uli's, DL7FZ, QSK transceiver is an example of knowledgeable and artful
engineering, including cunning circuity, which become obvious only after
repeated analysis. Only this and the combination with downright solid
and qualified mechanics resulted in the "A58" minmal art and "fat" bonus
points.
In category B though, success was based on simple technology (CO solo, B8)
and the antenna's literally house-high superiority. Uli, DJ9IE managed to
build upon his advantage gained from a QTH on his town's outskirts by
utilising several acres of antenna farm. Combining personal energy together
with knowledge and a liking for experiments (all of them also QRP virtues),
Uli erected loops and long dipoles between high wooden poles, the former
of which, when fed with 500mW, are about as load as 500W pumped into a
"miracle whip".
There were several complaints concerning crystal control's rigour.
The cure only costs one or two additional components:
A variable capacitor of about 200pF in series with a 3.5Mhz crystal yields
another telegraphy channel. A series inductance -often about 90uH- even opens
a window of several kHz (see e.g. QRP-Report 2/99, pp.14).
LZ1IQ's variant appears to be especially brilliant: Two inexpensive
crystals (~18 & 14.5MHz) oscillate in parallel, resulting in a frequency
difference of ~3.5MHz, with the advantage of an easier "pulling" higher
frequency crystals. Ceramic resonators (VRO) will yield even more VFO,
but here a stabilised power supply becomes neccessary, otherwise the
varying load from keying the PA could also vary the frequency. Wasn't
even "grandmaster" DJ1ZB slightly veiled in a trace of chirp? (see
equipment above)
So, let's have at it. Because all ideas put into action and improvements
will soon have an opportunity to show off:
In the 14th ORIGINAL-QRP-CONTEST (now with "Handmade" categories)
on 6/7th July
Until then 73/2 es bcnu
"Hal", Hartmut, DJ7ST
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