FET vs Tube QRO

W8JITom at aol.com W8JITom at aol.com
Thu Apr 11 14:00:57 EDT 1996


Hi Mario,
This isn't a good forum for in depth theoretical explainations, but this
touches on an area that does matter, wasting money and time chasing problems
that don't exist. This will be my last post on this subject. 

Misrepresentations cause people to waste money and effort making their
station worse. 
Everyone wants their amps to work well and be clean and reliable. But some of
the data published over the past few years is misleading. Instead of useful
mods and tips that really help, people have been fed a line of self-serving
bunk. I'm speaking directly of the wild parasitic voo doo, and *not* your
comments.

In a message dated 96-04-11 08:12:48 EDT, you write:
>Equivalent RF circuit is represented by current generator (almost ideal in
>the case of tetrodes) with output resistance of few kiloOhms driving tank.

That model is absolutely incorrect. The equivalent representation of a tube
is a time varying resistance in series with diode, NOT a current source.

1.) The tube only conducts when the anode is positive with respect to the
cathode.

2.) The tube conducts, it does not "source" or supply anything. It is only a
time varying resistance controlled by the grid-cathode voltage.

If the incorrect model is used, conclusions reached using that model may also
not be correct.

>Apart from my old colege books, I checked Collins: SSB systems & circuits
and
>Motorola RF transistors: Principles and practical applications and couldn't
>find a support for your claim.

The 30:1 rating for the FET is for a non-resonant load, not an unloaded high
Q resonant tank. Operation through a broadband transformer and low Q low pass
filter is much different than operation into a Hi-Q resonant load like an
unloaded tank. The unloaded Q of a PA tank can approach or exceed 200, even
when the design loaded Q is only ten.
  
Design books aren't going to explain esoteric operation like incorrect
loading. It's tough enough to describe correct operating parameters.

All this aside, I have facilities to measure PA stages, and an actual SB-220.
With the amplifier in the SSB position on 7 MHz at 1100 watts output I
measured 2.4 kV peak on the tuning cap. When I mistuned the amp by fully
meshing the loading cap and adjusting the tuning cap for maximum voltage I
measured 3.7 kV peak. The supply voltage was ~ 3kV when mistuned. So the p-p
volage was 4.8 kV loaded and 7.4 kV unloaded. This direct and easily
repeatable measurement disagrees with the 2:1 "rule".

>P.S.  KL7HF remark on VHF oscilations should be given due consideration.

Let me ask a simple question. 

1.) You say the peak tank voltage can NEVER exceed the supply voltage, and so
arcs can not come from underloading the tank.  

2.) You now seem to support the "weird science" that an intermittent
parasitic can cause peak voltage that greatly exceeds the supply voltage and
thus create an arc.

If my explaination that mistuning causes arcs because of energy storage is
incorrect because of statement one, how can number two be true? 

It is also alleged that parasitics cause very high currents through the tube
that explodes parts, yet the SATURATED emission current of a 3-500Z with
unlimited positive grid bias is only 2.6 amperes!

73 Tom

>From sawyers" <sawyers at cacd.rockwell.com  Thu Apr 11 21:35:40 1996
From: sawyers" <sawyers at cacd.rockwell.com (sawyers)
Date: Thu, 11 Apr 96 14:35:40 cst
Subject: Re[2]: Quieting amplifiers
Message-ID: <9603118292.AA829251434 at ccmgw1.cacd.rockwell.com>

You Said:

Eimac recommends .5" for 1200 watts CCS dissipation with the 3CX1200, and 
the flow can be reduced for amateur duty. Remember CCS is 1200 watts 
without ANY interruption.

I am assuming the ".5" " is one half inch of water column. So a quicky 
homemade manometer from clear plastic tubing would work?

Steve


>From Johnny Ryden <jr at pts.se>  Thu Apr 11 20:42:16 1996
From: Johnny Ryden <jr at pts.se> (Johnny Ryden)
Date: Thu, 11 Apr 1996 20:42:16 +0100
Subject: Fieldhunter's list, HF & 50 MHz
Message-ID: <96Apr11.203927gmt+0100.26499 at firewall.pts.se>



Just in time for the coming GridLoc HF contest this weekend, here
is the latest version of the fields list.
One of the participants on 50 MHz wrote: 'After most HF DXers have
worked all the countries and all the islands, I'd expect them to
get interested in Grid squares'. So this time I'm enclosing the
50 MHz list as a sample on how the HF list may look like, in, shall
we say 6 months time from now!?


                * * * FIELDHUNTER'S LIST * * *

This is a list of radio amateur's efforts to chase and collect
fields (big squares) according to the Maidenhead Locator System.
A field is a block of 20 degrees (longitude) bu 10 degrees (latitude).
Rules and furher information follow after the list.

The columns show:
Position on list. Callsign. The own field. Number of fields worked.
Date (YYMMDD), for last update.

Standings as of 31 March 1996.

    1.8 MHz
  1 SM5BFJ     JO  104   951218
  2 SM6CTQ     JO   87   960213
  3 SM6CPY     JO   84   910202
  4 W1JR       FN   79   900520
  5 SM3CWE     JP   75   930331
  6 SM3CVM     JP   43   951228
  7 SM6OLL     JO   35   950212
  8 SM3BP      JP   33   910331
  9 SM3CFV     JP   25   941231
 10 TI4SU      EK   24   910818
    YU7EF      KN   24   870930
 12 SM7WT      JO   22   941231
 13 OK1DKS     JO   12   890327
    SM0HTO     JO   12   900129
    SM5INC     JO   12   951231
 16 G4FVK      IO   10   910609
    SM4ARQ     JO   10   951230
 18 IK0XBX     JN    8   950727
 19 SM6ZN      JO    7   920406
    SM7RDT     JO    7   940927
 21 SM0LH      JO    5   880121
    SM4RIK     JO    5   960101
 23 SK6AW      JO    4   890930
 24 LA8AK      JO    3   871119
    SK5WB      JO    3   951228
    SM4JXG     JO    3   911231
    SM7CQY     JO    3   951227
 28 SM7NZB     JO    2   931231


    3.5 MHz
  1 SM6CPY     JO  162   901217
  2 K2RR       FN  155   880505
  3 SM3CWE     JP  142   930331
  4 W1JR       FN  126   900520
  5 YU7EF      KN  120   870930
  6 SM7WT      JO  113   941231
  7 SM5CAK     JO  104   940731
  8 SM3CFV     JP   90   941231
  9 SM0HTO     JO   85   940817
 10 SM3CVM     JP   82   951228
 11 SM0CCE     JO   79   850122
 12 SK6AW      JO   69   890930
 13 SM4ARQ     JO   53   951230
 14 TI4SU      EK   48   890508
 15 SM5INC     JO   41   951231
 16 OK1DKS     JO   30   890327
 17 F6HKA      JN   28   880829
 18 SM3BP      JP   25   950615
 19 IK0XBX     JN   22   950727
 20 SM7CQY     JO   21   960331
 21 SM0LH      JO   19   930203
 22 SM6ZN      JO   18   920406
 23 G4FVK      IO   15   910609
 24 SM6PRX     JO   13   950815
    SM7RDT     JO   13   940927
 26 KC9RG      EN   11   890331
    SM0SKB     JO   11   950105
 28 SM6FXW     JO   10   911225
 29 SM4RLD     JO    9   950925
    SM7NZB     JO    9   931231
 31 LA8AK      JO    8   871119
    SM4RIK     JO    8   960101
 33 SK5WB      JO    7   951228
    SM4JXG     JO    7   911231
    SM5DUT     JO    7   910912


    7 MHz
  1 SM7WT      JO  169   941231
  2 SM3CWE     JP  163   930331
  3 W1JR       FN  146   900520
  4 SM5CAK     JO  142   940731
  5 SM0CCE     JO  138   850122
  6 SM3CVF     JP  124   941231
  7 SM3CVM     JP  122   951228
  8 SM0HTO     JO  121   940817
  9 SM4ARQ     JO   96   951230
 10 SM5INC     JO   94   951231
 11 SK6AW      JO   92   890930
 12 SM7PKK     JO   86   870322
 13 TI4SU      EK   76   890508
 14 YU7EF      KN   74   870930
 15 SM3BP      JP   49   950615
 16 SM7CQY     JO   45   960331
 17 F6HKA      JN   43   880829
 18 SM3PZG     JP   38   890806
 19 SM6ZN      JO   32   950404
 20 OK1DKS     JO   29   890327
 21 IK0XBX     JN   26   950727
    SM4RIK     JO   26   960101
 23 SM7RDT     JO   23   940927
 24 SM0LH      JO   19   890221
 25 SM6PRX     JO   18   950815
 26 G4FVK      IO   17   910609
 27 SM0SKB     JO   15   950105
 28 9V1RH      OJ   14   870610
    SM4RLD     JO   14   950925
 30 KC9RG      EN   13   890331
 31 SM4JXG     JO   11   911231
    SM7NZB     JO   11   931231
 33 SM5DUT     JO   10   910912
    SM6FXW     JO   10   900103
 35 SK5WB      JO    6   951228
 36 LA8AK      JO    5   871119


    10 MHz
  1 SM7WT      JO   90   941231
  2 W1JR       FN   82   900520
  3 SM3CFV     JP   79   941231
  4 SM3CWE     JP   74   930331
  5 SM5FUG     JO   67   941031
  6 SM3CVM     JP   66   951228
  7 SM4ARQ     JO   58   951230
  8 SM5INC     JO   52   951231
  9 9M2FP      OJ   49   880531
 10 VS6BI      OL   47   900618
 11 SM3BP      JP   44   950615
 12 SM7BDB     JO   43   910331
 13 SM6ZN      JO   36   920508
 14 SM0HTO     JO   33   940817
 15 SM4RIK     JO   18   960101
 16 SM0LH      JO   17   930203
    SM5ACQ     JO   17   870625
 18 SM5DUT     JO   16   941212
    SM6MSG     JO   16   871016
 20 SM7CQY     JO   15   960331
 21 SM4JXG     JO   11   911231
 22 SM6FXW     JO    9   910916
 23 KC9RG      EN    8   890331
 24 SM0SKB     JO    6   950105
 25 SM5PAX     JO    4   850930
 26 F6HKA      JN    3   880829
    SM5CAK     JO    3   870206
    SM7NZB     JO    3   931231
 29 SK6AW      JO    2   890930
 30 SK5WB      JO    1   951228


    14 MHz
  1 SM3CWE     JP  239   930331
  2 SM7WT      JO  221   941231
  3 SM0HTO     JO  212   940817
  4 W1JR       FN  206   900520
  5 SM3CFV     JP  204   941231
  6 SM6LIF     JO  195   900511
  7 SM4ARQ     JO  194   951230
    SM5CAK     JO  194   940731
  9 SM0CCE     JO  186   850122
 10 SM3CVM     JP  172   951228
 11 SK6AW      JO  167   890930
 12 SM5INC     JO  148   951231
 13 W6DU       CM  147   860526
 14 SM5ACQ     JO  122   850930
 15 OK1DKS     JO  120   900831
 16 SM4RIK     JO  114   960101
 17 SM5DUT     JO  110   941212
    TI4SU      EK  110   890508
 19 SM0LH      JO  107   930203
 20 SM7CQY     JO  104   960331
 21 SM3PZG     JP   95   890806
 22 SM6PRX     JO   92   950815
 23 F6HKA      JN   85   880829
 24 YU7EF      KN   80   870930
 25 SM5FBL     JO   78   900530
 26 SM3BP      JP   71   950615
 27 SM6ZN      JO   60   950404
 28 KC9RG      EN   48   890331
 29 G4FVK      IO   45   910609
 30 IK0XBX     JN   42   950727
    SM4JXG     JO   42   911231
 32 SM6FXW     JO   31   911123
 33 SM0SKB     JO   23   950105
 34 SK5WB      JO   20   951228
 35 SM7NZB     JO   18   931231


    18 MHz
  1 SM4ARQ     JO  126   951230
  2 SM7WT      JO  123   941231
  3 SM5INC     JO  118   951231
  4 SM3CFV     JO  116   941231
  5 W1JR       FN   95   900520
  6 SM7BDB     JO   80   910331
  7 SM6ZN      JO   69   950404
  8 VS6BI      OL   62   900618
  9 SM3CVM     JP   59   951228
 10 SM7RDT     JO   55   940927
 11 SM3CWE     JP   46   930331
 12 SM3BP      JP   39   950615
 13 SM4RIK     JO   34   960101
 14 SM7CQY     JO   31   960331
 15 SM0LH      JO   28   911231
 16 SM0SKB     JO   20   950105
    SM6FXW     JO   20   910914
 18 SM4JXG     JO   16   911231
 19 SM5ACQ     JO   12   870331
 20 SM5DUT     JO   11   941212
 21 OK1DKS     JO   10   900831
 22 SM0HTO     JO    8   900129
 23 SM5PAX     JO    3   850930
 24 KC9RG      EN    2   890331
 25 9V1RH      OJ    1   870610
    F6HKA      JN    1   880829


    21 MHz
  1 SM7WT      JO  172   941231
  2 SM3CWE     JP  166   930331
  3 SM3CFV     JP  161   941231
  4 SM6LIF     JO  157   900511
  5 SM0CCE     JO  153   850122
    SM5CAK     JO  153   940731
    W1JR       FN  153   900520
  8 SM3CVM     JP  140   951228
  9 SM5INC     JO  139   951231
 10 SM0HTO     JO  132   940817
 11 SK6AW      JO  130   890930
    SM4ARQ     JO  130   951230
 13 SM5DUT     JO  124   931219
 14 SM4RIK     JO   98   960101
 15 F6HKA      JN   95   850930
    SM5ACQ     JO   95   850930
 17 OK1DKS     JO   92   900831
 18 SM7CQY     JO   90   960331
 19 SM6PRX     JO   89   950815
 20 SM6ZN      JO   69   950404
 21 TI4SU      EK   67   890508
 22 YU7EF      KN   65   870930
 23 SM7RDT     JO   64   940927
 24 SM3PZG     JP   59   890806
 25 SM0LH      JO   51   911231
 26 SM3BP      JP   48   950615
 27 IK0XBX     JN   47   950727
 28 SM4JXG     JO   41   911231
 29 G4FVK      IO   40   910609
 30 KC9RG      EN   38   890331
 31 SM0SKB     JO   37   950105
    SM6FXW     JO   37   910707
 33 SM4RLD     JO   31   950925
 34 SK5WB      JO   19   951228
 35 SM7NZB     JO   12   931231


    24 MHz
  1 SM4ARQ     JO  101   951230
  2 SM7WT      JO  100   941231
  3 SM5INC     JO   97   951231
  4 W1JR       FN   88   900520
  5 SM3CFV     JP   85   941231
  6 SM7BDB     JO   79   910331
  7 SM6ZN      JO   60   950404
  8 SM3CVM     JP   51   951228
  9 SM4RIK     JO   48   960101
 10 SM7RDT     JO   44   940927
 11 SM0LH      JO   32   890221
    SM3CWE     JP   32   930331
 13 SM7AST/CT1 IM   30   880323
 14 SM5KUX     JO   28   941112
 15 VS6BI      OL   27   900618
 16 SM3BP      JP   26   950615
 17 SM0SKB     JO   21   950105
 18 SM7CQY     JO   14   960331
 19 KC9RG      EN   12   890331
    SM6FXW     JO   12   911229
 21 SM4JXG     JO   11   911231
 22 SM0HTO     JO   10   900129
 23 OK1DKS     JO    9   900831
    SM5DUT     JO    9   941212
 25 SM5ACQ     JO    5   870508
 26 F6HKA      JN    2   880829
 27 9V1RH      OJ    1   870610
 28 SK5WB      JO    1   951228


    28 MHz
  1 SM0HTO     JO  187   940817
  2 DF2NJ      JO  178   921128
  3 SM6LIF     JO  168   900511
    SM7WT      JO  168   941231
  5 W1JR       FN  151   900520
  6 SM3CWE     JP  148   930331
  7 SM5INC     JO  135   951231
  8 SM4ARQ     JO  134   951230
  9 SM3CFV     JP  133   941231
 10 SM7LXV     JO  127   850630
 11 SM0CCE     JO  126   850122
 12 SM5CAK     JO  116   940731
 13 SK6AW      JO  115   890930
 14 SM5DUT     JO  114   931219
 15 SM4HEJ     JO  107   960212
 16 SM3CVM     JP  101   951228
 17 SM0HJV     JO   93   860917
 18 SM6PRX     JO   82   950815
 19 SM4RIK     JO   80   960101
    TI4SU      EK   80   910814
 21 F6HKA      JN   76   880829
 22 SM6MVL     JO   73   920331
 23 SM0SKB     JO   63   950105
    SM6ZN      JO   63   911124
 25 SM3PZG     JP   60   890806
 26 SM7CQY     JO   59   960331
 27 OK1DKS     JO   56   900831
    SM7RDT     JO   56   940927
 29 SM5ACQ     JO   53   850930
 30 SM0LH      JO   46   890910
 31 SM6FXW     JO   43   901028
 32 IK0XBX     JN   35   950727
    YU7EF      KN   35   870930
 34 G4FVK      IO   33   910609
 35 SM7NZB     JO   29   931231
 36 KC9RG      EN   24   890331
 37 SK5WB      JO   21   951228
    SM5JXA     JO   21   861101
 39 SM3BP      JP   19   950615
    SM4RLD     JO   19   950925
 41 SM4JXG     JO   12   911231


    50 MHz
  1 JA1VOK     QM  112   930930
  2 JA6TEW     PM   88   920430
    NI6E/KH6   BK   88   920514
  4 WA6BYA     CM   86   951110
  5 PY5CC      GG   82   950314
  6 GJ4ICD     IN   74   950630
    W5OZI      EM   74   940510
  8 K9LCR      EN   71   960112
    SV1DH      KM   71   940830
    WA1OUB     FN   71   960112
 11 W4DR       FM   70   960224
 12 K1TOL      FN   69   950301
    N0LL       EM   69   940806
 14 SM7FJE     JO   68   950522
    TI2NA      EJ   68   950301
 16 K0US       EN   67   940501
    ON4KST     JO   67   950723
    VK3OT      QF   67   931131
 19 G3WOS      IO   66   951221
 20 SM7AED     JO   65   950731
 21 SM7BAE     JO   64   950723
 22 G4IGO      IO   62   950224
 23 G4UPS      IO   61   950109
    KH6HH      BL   61   950507
    PA0RDY     JO   61   941212
    W3EP       FN   61   960115
 27 K1GPJ      FN   59   950301
    S59A       JN   59   940418
 29 G0JHC      IO   58   950731
    WB8YFE     EN   58   950713
 31 W7HAH      DN   57   940801
    WB4DBB     FM   57   950710
 33 OZ3ZW      JO   56   941101
    WA5IYX     EL   56   950822
 35 G3OIL      IO   55   950915
    K0TLM      EM   55   950815
    W0KEA      DM   55   950926
    W3ZZ       FM   55   960114
 39 WA1AYS     FN   53   940814
 40 G4IFX      IO   52   951011
    I5MXX      JN   52   950410
    PA3FYM     JO   52   941007
 43 DJ3TF      JN   51   960120
    ZS6WB      KG   51   940519
 45 PA2TAB     JO   49   950204
 46 I0CUT      JN   48   950411
    WA5QCP     DM   48   950901
 48 K6EID      EM   47   950818
    W3IWU      FN   47   941231
    ZL3AAU     RE   47   950817
 51 G4HBA      IO   46   950224
    K6FV       CM   46   950915
    PE1LCH     JO   46   950721
 54 W3OTC      FM   44   960226
 55 VK6HK      OF   43   951019
 56 S59F       JN   42   950114
 57 SM3EQY     JP   40   950813
 58 K0CJ       EN   39   960221
 59 N8NQS      EN   37   950206
 60 OZ5IQ      JO   36   950812
 61 K8UNV      EM   35   950828
 62 OH1LEU     KP   34   950614
 63 OH5IY      KP   32   940803
    SM0KAK     JO   32   930930
    YO2IS      KN   32   941009
 66 SM7JUQ     JO   31   950619
    W6YLL      CM   31   950310
 68 PA0ION     JO   30   950110
 69 PA3GML     JO   28   950721
    VK3ALM     QF   28   950811
 71 ES6QB      KO   27   951001
 72 OZ1IZB     JO   26   941007
 73 SM7NNJ     JO   25   940630
    VE6XT      DO   25   950808
    VE7SKA     CN   25   960121
 76 OZ1IEP     JO   24   951014
 77 DL3YEE     JO   23   950410
    KB6NAN     CM   23   950815
 79 DL8EBW     JO   22   940424
 80 G6MXL      IO   21   941126
    KL7GLL/W4  FM   21   950913
    NL7XM      FN   21   950730
    WB7QBS     CN   21   950524
 84 ES5MC      KO   20   951001
    OH1AJ      KP   20   950724
 86 SM4POB     JP   19   950812
 87 DL3AMA     JO   18   950329
    DL5BBL     JO   18   950721
 89 ON4FZ      JO   17   940906
    PE1EBJ     JO   17   960322
 91 KD4GVW     EM   16   950508
 92 DL1EJA     JO   15   950722
    ES1CW      KO   15   951001
    ES5RY      KO   15   951001
    G0DCJ      JO   15   950731
    G4MJS      IO   15   950627
    SM6MPA     JO   15   950827
 98 ES5DE      KO   14   951001
    G8CDW      JO   14   951112
    KB0MJD     DN   14   960215
    PE1OGF     JO   14   950112
    SM5NVF     JO   14   950614
103 K0RZ       DM   13   950116
104 ES2RW      KO   12   951001
    ES5QA      KO   12   951001
    ES6PZ      KO   12   951001
    OH2BNH     KP   12   940729
108 KO6ET      DM   11   950818
    SM5INC     JO   11   940331
110 ES0SM      KO   10   951001
    KB0QDK     DN   10   960223
    OZ1CJX     JO   10   960228
    PE1MJR     JO   10   940929
    SM3VEE     JP   10   950928
    SM5PPS     JO   10   950730
116 ES1II      KO    9   951001
    ES5PC      KO    9   951001
    SM4HEJ     JO    9   960212
    XE1KK      EK    9   960114
120 ES2RJ      KO    8   951001
    NH6YK      BL    8   960114
121 NH6YK/KH4  AL    7   960114
122 OZ2AEV     JO    6   951025
    SM5KUX     JO    6   950624
124 ES1AW      KO    5   951001
    ES1HW      KO    5   951001
    ES2XM      KO    5   951001



RULES: 1. All fields must have been worked via passive reflectors.
2. All stations involved must be on the earth's surface. 3. QSL cards
are not required if you are certain that the other station considers
the QSO to have been completed. 4. All QSO's must have been worked from
points within a circle of 1000 km radius. 5. There is no starting date
for contacts to be eligible.
A world map showing the 324 fields can be found in "The Radio Amateur's
World (Locator) Atlas", that normally should be available at your natio-
nal amateur radio society.
Compiled quarterly since 1982, the list shows the situation on March 31,
June 30, September 30 and December 31 at 2400 UTC. Please send your info
as soon as possible to SM5INC, Johnny Ryden, Slanbarsvagen 270, S-745 60
Enkoping, SWEDEN. Phone +46 - 17127883.
Packet SM5INC @ SK5BB.#AROS.U.SWE.EU
E-mail jr at pts.se


                              ======

>From Dave Zeph <zephd at iquest.net>  Thu Apr 11 20:49:37 1996
From: Dave Zeph <zephd at iquest.net> (Dave Zeph)
Date: Thu, 11 Apr 1996 19:49:37 +0000
Subject: Source of Dow-Corning 3140
Message-ID: <m0u7SOc-004XmvC at iquest.net>

When I still had my multi-multi station I used Dow-Corning 3140 Silicone
Rubber to seal items like the potentiometers in my rotor control circuits.
We used 3140 where I worked as a thick conformal coat over electronic
modules.  It was resistant to just about everything.  Unlike the Silicone
Rubber caulks, this material "flowed" and was self-leveling.

The "Swiss Navy" provided my original source.  That venue no longer being
available, I'd like to purchase a small can.  Does anyone on the Reflector
know a mail-order supplier of Dow-Corning 3140 Silicone Rubber?


Thanks ..... Dave
*********************************************************************
Dave Zeph, W9ZRX
Home     : (317) 896-3876
FAX/Data : (317) 867-1809
E-Mail   : zephd at iquest.net
                               


>From Micheal Ihry <mihry at topher.net>  Thu Apr 11 20:23:39 1996
From: Micheal Ihry <mihry at topher.net> (Micheal Ihry)
Date: Thu, 11 Apr 1996 14:23:39 -0500
Subject: pow-wow on internet
Message-ID: <01BB27B6.DA4E0D20 at ppp06.topher.net>

hi all

a non-ham friend just told me about a new internet chat line called pow-wow.
real time conversations with a MICROPHONE anywhere in the world.
has anyone else heard of this?
de AC5CT...mike in tx


>From Micheal Ihry <mihry at topher.net>  Thu Apr 11 20:52:22 1996
From: Micheal Ihry <mihry at topher.net> (Micheal Ihry)
Date: Thu, 11 Apr 1996 14:52:22 -0500
Subject: help on xformer
Message-ID: <01BB27B6.E815E220 at ppp06.topher.net>

hi all
i need to know what the ac output is on a model DTR2000L main power xformer.
also need a 850-160  model tuned circuit.
tnx
de ac5ct...mike in tx


>From Bill Fisher  KM9P <km9p at akorn.net>  Thu Apr 11 21:19:01 1996
From: Bill Fisher  KM9P <km9p at akorn.net> (Bill Fisher KM9P)
Date: Thu, 11 Apr 1996 16:19:01 -0400 (EDT)
Subject: HC8N CQWW 95 Story by WX3N
Message-ID: <Pine.BSD/.3.91.960411161736.7363A-100000 at paris.akorn.net>


Available at http://www.contesting.com/km9p/hc8n.html

Dave has promised me pictures to go with the story.  I'll add them when 
he gets them to me.

Thanks

Bill, KM9P


>From Bruce (AA8U)" <aa8u at voyager.net  Thu Apr 11 21:56:28 1996
From: Bruce (AA8U)" <aa8u at voyager.net (Bruce (AA8U))
Date: Thu, 11 Apr 1996 16:56:28 -0400 (EDT)
Subject: AA8U 95/96 Contest Summary
Message-ID: <199604112056.QAA07139 at vixa.voyager.net>



Hello Jim,

I received my copy of the Mad River FLASH today. I see you have not been
getting the scores I have passed your way so I went through all the contest
records for here this season and typed them up for you. All of them here are
as submitted and all scores were posted to Mad River Contest Club. The total
points from here includes the KT8X operation which took place at this
station. I'll update this list after WPX CW and send it to you. I consider
the contest season to start at CQWW SSB and ends at WPX CW. Some of our
scores were not listed in the FLASH....... It sure has been a fun contest
season so far!
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

1995 CQWW DX SSB
MULTI/SINGLE

Band    QSO   Zones   Countries       
-----------------------------------
160      48     12      30
 80     253     17      69
 40     163     26      80
 20     682     38     126
 15     783     28     115
 10      86     15      27

       2015    136     447      =       3,151,115

Ops: AA8U, AA8AV, AA8FE, KA8AEE, K8MJZ, KD8B, KF8QE, KT8X, WA8VHQ, WB8ALP, WX3M

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

1995 ARRL SWEEPSTAKES CW
MULTI/SINGLE

Band    QSO     Sections
-------------------------
160      13
 80     392
 40     491
 20     174
 15      45
 10       2

       1117    77       =       172,018

Ops: AA8U, K8MJZ, KF8DF, N8CC, WX3M, AA8FE, KF8QE

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

1995 ARRL SWEEPSTAKES SSB
MULTI/SINGLE

Band    QSO     Sections
--------------------------
160       0
 80     839
 40     428
 20     153
 15     205
 10       0

       1625     77      =       250,250

Ops: AA8U, K8MJZ, AA8FE, KF8DF, KT8X

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

1995 CQ WW DX CW
SINGLE OPERATOR / SINGLE BAND 160

Band    QSO  ZONES   COUNTRIES
----------------------------------
160     331     22      74     =        64,416

Op: AA8U

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

1995 CQ 160 METER CONTEST
MULTI/SINGLE

QSO   STATES  COUNTRIES
-------------------------
37      11      15      =       6,500

Op: AA8U 
                                       
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

1995 ARRL 160 METER CONTEST
SINGLE OPERATOR

 QSO     SECTIONS  COUNTRIES
------------------------------------
1210       74         34      =       289,224

Op: AA8U

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

1995 ARRL 10 METER CONTEST
SINGLE OPERATOR

MODE   QSO   STATES  COUNTRIES
---------------------------------
CW      73      23      2
SSB     83      19      9

       156      42      11      =       24,274

Op: AA8U

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

1996 ARRL DX CW
SINGLE OPERATOR / SINGLE BAND 160

BAND   QSO   COUNTRIES
-----------------------------
160     96      39      =       11,115

Op: AA8U

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

1996  CQ 160 METER CONTEST
MULTI/SINGLE

QSO   STATES  COUNTRIES 
-------------------------
1271    56      31      =       266,829

Ops: AA8U, AA8AV, K8MJZ, KT8X

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

1996 ARRL DX SSB
SINGLE OPERATOR / SINGLE BAND 160

BAND   QSO   COUNTRIES
--------------------------
160     62      43      =       7,740
 
Op: AA8U

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

1996 CQ WW WPX SSB
MULTI SINGLE

BAND    QSO     PREFIX
---------------------------
160       8       2
 80     489     169
 40     158      69
 20    1250     545
 15      99      29
 10      20       4

       2024     819     =       3,881,241

Ops: KT8X, AA8U, AA8AV, K8MJZ, AA8FE, KF8DF, KF8QE, KB8ECG, KG8CO, NU8Z

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

1996 CQ WW WPX CW

   PENDING




The season points total to date from AA8U station = 8,124,722
Hope to add another mil. or so for wpx cw..........

73,
UGLY



>From AA3JU George Cook <george at epix.net>  Fri Apr 12 00:12:23 1996
From: AA3JU George Cook <george at epix.net> (AA3JU George Cook)
Date: Thu, 11 Apr 1996 19:12:23 -0400
Subject: Pointy tops on Rohn 25
Message-ID: <199604112306.TAA29407 at coconut.epix.net>

I have a pointy top on my tower (Rohn 25)

Is there any type of thrust bearing I can use with this type top to releive
some of the wieght from the rotor?  Due to some metal stress my quad is down
right now and while waiting for the repair part it would seem to be a good
time to add  a bearing if it is possible.

George
AA3JU  george at epix.net    AA3JU at W3PYF
Proudly  F R C...........
"FRC When second best just isn't good enough!"


>From Tom Francis <tomf at neca.com>  Fri Apr 12 00:35:49 1996
From: Tom Francis <tomf at neca.com> (Tom Francis)
Date: Thu, 11 Apr 1996 19:35:49 -0400
Subject: Tubular towers/radio
Message-ID: <199604112335.TAA24142 at orion.neca.com>

Hello all and thanks for reading - 

I considering a second tower and would like
to solicit opinions on the US Tower MA series 
tubular towers (or should they really be called
heavy duty mast?). 

I'm looking at this point, but the 70" version
is probably what I would be most interested in.

Anybody have any experience with these things??

Second - I'm thinking - please note the thinking -
about replacing my FT-990 with a FT-1000 series 
radio - my question is simple - is the any advan-
tage to purchasing the MP versus a loaded D model?

Thanks in advance for any advice you may have to
offer.  Please advise direct rather than bother
the cluster with replies.

73

Tom, NM1Q (tomf at neca.com)
"Clunk enough people on the head and you'll 
 wind up with a nation of lump heads."
                        Foghorn Leghorn 







More information about the CQ-Contest mailing list