K5CM Day Time FMT Nov 1  2020  1830 UTC   (Sunday in North America)

Comments 

 

Call

Section

Grid

Comments

KB2HSH

WNY

FN02NX

Thank you, Connie for this special "during the day

WS7M

CO

DN70KM

First time FMT. Unreferenced, Flex-6600 with GPSDO, 80m loop ant @ 30 feet

W4WJ

STX

EM00mg

20m RUFF -120dBm QSB into the noise floor... tough to get a good zero... 40m -80dBm very stable... TNX Connie as always... 73 Don W4WJ

W5LAC

MS

EM51

Signal on 20 not usable at this QTH. 40 was OK, used Flex 3000 and Fldigi

KD2BD

NNJ

FN20xd

Lots of slow QSB with Connie's signal occasionally dipping below my noise level. The Kp-index was a 3. I used a small vertically polarized indoor loop antenna into a newly improved preamp, driving my homebrew FMT gear using a never-before-used DDS VFO.

K7NG

ORE

CN73ui

40M this time of day was rough to PNW but I did see a steady signal on fldigi waterfall. IC7610 + fldigi

AB2UW

NLI

FN30lu

Tougher with freq change after callup & 30s key down. THANKS for this practice FMT!

W1HKJ

AL

EM64QV

Signal had two heavy QSB dropouts. Signal appeared to have short term FM component compared to a local GPSDO monitored simultaneously

W2TX

GA

EM74se

20M was extremely weak to inaudible. 40M was 10uV (from a 40 ft verticle) with some fading. Thank you, Connie!

WA2DVU

SNJ

20 M sig 10/9 solid - virtually no doppler, 40 M sig S6 some doppler. Thanks Connie.

VE9DAN

MAR

FN65td

SDRplay RSP-1, FLdigi, and Python. Good signals both bands.

N9KT

IN

EM69wv

Thanks Connie! 756Pro2 with WSJT-X.

AF9A

IN

EM69wv

20m east signal never got more than 10dB above the noise. West was S9+10. 40m was so good I forgot to make note of it. Thanks Connie!

WD4IYE

KY

EM78qx

20 Meters was below my S7 noise level. 40 Meters was S9 and solid copy. LOL I had lots of plans for work around the house today but it can wait. I didn't double check so hopefully I'm within a Hz. Thanks Connie!

VE2IQ

ON

FN15nt

20M east: S9+20, west: S5, 40M: weak. Tnx Connie

W9TN

IN

EN60

The usual heterodyne method with GPS locked signal generator injecting an RF reference signal creating an AF beat note measured with Spectrum Lab. Managed to mess up the first 20m run, so data is from second. 40m signal very strong. TU Connie!

W7SUA

AZ

DM34rs

got confused here but got 1st 20m keydown and the 40m keydown. I used fldigi's FMT Modem with a GPSDO stabilized SigLent 2042X as the reference signal. Much fun! Thanks Connie de Tom W7SUA

KD5FX

OK

EM16lr

Weak signals on 20 but great signal on 40.

VE3YX

ON

FN16fd

Used the new FMT mode in FLdigi. TS-870 with Bodnar mini for its ref. Ref signal is from Marconi 2018A with a separate 10 MHz GPSDO. Both dir. 20 m signals were strong but 40 was weak. Did not include Doppler compensation.

KA5QEP

OK

EM15ni

W9INE

CO

DM70gi

FLEX 6700 & FLDIGI

WQ8T

MI

EN74hf

Thanks again Connie.

k2lyv

WCF

el88rb

Just a quick setup. Was busy and only caught the 40M run.

W4VU

NC

FM06fb

HP 3586B Visual observations - took median. 15 min warmup. Not ready with software. Thanks for practice run Connie!

 

 

 

40 Meters

Call

Section

Grid

TX Frequency

Measured Freq

Error in Hz

Error in PPX

W7SUA

AZ

DM34rs

7065252.408

7065252.41

0.002

2.83E-10

VE3YX

ON

FN16fd

7065252.408

7065252.431

0.023

3.26E-09

W4WJ

STX

EM00mg

7065252.408

7065252.434

0.026

3.68E-09

WA2DVU

SNJ

7065252.408

7065252.377

-0.031

4.39E-09

KD2BD

NNJ

FN20xd

7065252.408

7065252.441

0.033

4.67E-09

W2TX

GA

EM74se

7065252.408

7065252.448

0.040

5.66E-09

WQ8T

MI

EN74hf

7065252.408

7065252.368

-0.040

5.66E-09

W9TN

IN

EN60

7065252.408

7065252.359

-0.049

6.94E-09

VE2IQ

ON

FN15nt

7065252.408

7065252.343

-0.065

9.20E-09

WD4IYE

KY

EM78qx

7065252.408

7065252.34

-0.068

9.62E-09

W5LAC

MS

EM51

7065252.408

7065252.5

0.092

1.30E-08

AF9A

IN

EM69wv

7065252.408

7065252.281

-0.127

1.80E-08

AB2UW

NLI

FN30lu

7065252.408

7065252.28

-0.128

1.81E-08

W1HKJ

AL

EM64QV

7065252.408

7065252.259

-0.149

2.11E-08

K7NG

ORE

CN73ui

7065252.408

7065252.565

0.157

2.22E-08

N9KT

IN

EM69wv

7065252.408

7065252.203

-0.205

2.90E-08

KA5QEP

OK

EM15ni

7065252.408

7065252.66

0.252

3.57E-08

K2LYV

WCF

EL88rb

7065252.408

7065251.934

-0.474

6.71E-08

WS7M

CO

DN70KM

7065252.408

7065251.801

-0.607

8.59E-08

W9INE

CO

DM70gi

7065252.408

7065253.342

0.934

1.32E-07

W4VU

NC

FM06fb

7065252.408

7065254

1.592

2.25E-07

VE9DAN

MAR

FN65td

7065252.408

7065248.835

-3.573

5.06E-07

KD5FX

OK

EM16lr

7065252.408

7065247.938

-4.470

6.33E-07

KB2HSH

WNY

FN02NX

7065252.408

7065247.905

-4.503

6.37E-07


 

20 Meters

Call

Section

Grid

TX Frequency

Measured Freq

Error in Hz

Error in PPX

AB2UW

NLI

FN30lu

14121411.408

14121411.4

-0.008

5.67E-10

W9TN

IN

EN60

14121411.408

14121411.394

-0.014

9.91E-10

W9INE

CO

DM70gi

14121411.408

14121411.423

0.015

1.06E-09

WA2DVU

SNJ

14121411.408

14121411.378

-0.030

2.12E-09

AF9A

IN

EM69wv

14121411.408

14121411.439

0.031

2.20E-09

VE3YX

ON

FN16fd

14121411.408

14121411.374

-0.034

2.41E-09

VE2IQ

ON

FN15nt

14121411.408

14121411.372

-0.036

2.55E-09

N9KT

IN

EM69wv

14121411.408

14121411.359

-0.049

3.47E-09

KA5QEP

OK

EM15ni

14121411.408

14121411.35

-0.058

4.11E-09

WD4IYE

KY

EM78qx

14121411.408

14121411.53

0.122

8.64E-09

WQ8T

MI

EN74hf

14121411.408

14121411.286

-0.122

8.64E-09

W7SUA

AZ

DM34rs

14121411.408

14121411.535

0.127

8.99E-09

W4WJ

STX

EM00mg

14121411.408

14121411

-0.408

2.89E-08

K7NG

ORE

CN73ui

14121411.408

14121412.012

0.604

4.28E-08

WS7M

CO

DN70KM

14121411.408

14121412.04

0.632

4.48E-08

VE9DAN

MAR

FN65td

14121411.408

14121407.864

-3.544

2.51E-07

W4VU

NC

FM06fb

14121411.408

14121416

4.592

3.25E-07

KB2HSH

WNY

FN02NX

14121411.408

14121416.724

5.316

3.76E-07

KD5FX

OK

EM16lr

14121411.408

14121404.2

-7.208

5.10E-07

 

For those interested, the call up frequencies were: 7065244.368, and 14121403.281

 

 

Transmitting equipment used by K5CM for this FMT:

A HP Z3801 GPS frequency source clocks a HP-3336B. The output is feed to a 10 db transistor amp which drives a 12BY7 / pair 6146. Then to a AL-1500 running about 750 watts out.  There are no mixers or any device in the chain of amplifiers that might impact the accuracy of the GPS frequency source.  As a reality check,  I periodically log the frequency source against WWV and other GPS referenced sources.  I monitor each transmission with a completely separate receive system to look for any instability or short term drift. 

I typically see considerably less than 1 mHz difference at 10 Mhz when comparing  two Z3801's or a Z3801 and a Thunderbolt, over a 10 to 10,000 second period. 

 

Antennas:

 80 - Dipole.  (favors West, North, East)

 40 - Standard Dipole hanging between two 80 foot towers. (favors East, West)

 20 - TH7 at 80 feet

 

73,

Connie

K5CM

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