Nov 112013

I have left a note with Carol at RSGB to confirm our exam status. Both Conrad and I have completed Assessor vetting forms and these will be sent off this Friday.

These may take two months to approve.

I am in contact with Steve Hartley from RSGB trainers sourcing the best training slides and information available which we can tailor to our needs.

Im sorry it is a long slog but we were left in the lurch a little.

We are hoping to get a batch of M6 and 2E processed in the new year.

I see no reason why we cant start getting to grips with some basic elements such as tuning a radio, re connecting and SWR tuning etc.

Other practicals such as morse awareness and making a qso can only be done whilst on a dedicated course.

Ill update you with progresss.


Nov 012013

Published by ARRL

ARLD044 DX news

DX Bulletin 44 ARLD044
From ARRL Headquarters
Newington CT October 31, 2013
To all radio amateurs

ARLD044 DX news

This week’s bulletin was made possible with information provided by
N7QT, NC1L, QRZ DX, the OPDX Bulletin, 425 DX News, The Daily DX,
DXNL, Contest Corral from QST and the ARRL Contest Calendar and
WA7BNM web sites. Thanks to all.

EASTER ISLAND, CE0Y. A group of operators are QRV as XR0YY from
Hanga Roa, IOTA SA-001, until November 7. Activity is on 160 to 6
meters using all modes. QSL direct via EB7DX.

CAPE VERDE, D4. John, G4IRN will be QRV as D44TWQ from Boa Vista
Island, IOTA AF-086, from November 5 to 12. Activity is holiday
style on the newer bands using CW. QSL to home call.

NIUE, E6. Look for JA1KJW, JA1JQY and JA8VE to be QRV as E6AK, E6AY
and E6AA, respectively, from November 3 to 9. Activity will be on
80 to 10 meters using all modes. QSL to home calls.

SCOTLAND, GM. Special event station GM100RSGB will be QRV from
November 6 to December 2 to celebrate the 100th anniversary of the
RSGB. QSL via bureau.

SAN ANDRES AND PROVIDENCIA, HK0. A group of operators are QRV as
5J0R from San Andres Island, IOTA NA-033, until November 10.
Activity is on 160 to 6 meters using CW, SSB and RTTY. QSL direct
via EA5RM.

ANTARCTICA. Max, IA0MZ is QRV from Mario Zucchelli Station until
February 2014. QSL via IW0EFA.

ITALY, I. Special event call sign II8IDXC is QRV until May 2015
during the International DX Convention 2015 in Paestrum. Activity
is on the HF bands and 6 meters using all modes. QSL via IZ8EDJ.

SABA, ST. EUSTATIUS, PJ5. Rob, N7QT and Hugh, W4VAB will be QRV as
PJ6/N7QT and PJ6/W4VAB, respectively, from Saba from November 7 to
17. Activity will be on 80 to 10 meters using CW, SSB, RTTY, PSK
and JT65. QSL to home calls.

ANTARCTICA. Operators Oleg, UA1PBA, Alex, UA1PAW and Slava, UA1PAI
are QRV as RI1ANR from Novo Runway until March 2014. Activity is on
the HF bands with a focus on the low bands. QSL via RK1PWA.

POLAND, SP. Special event station SN640OKA is QRV until December 31
to celebrate the 640th anniversary of Ostroleka, a town in Mazovia.
QSL via Bureau.

BANABA, T33. A group of operators will be QRV as T33A from Banaba
Island, IOTA OC-018, from November 5 to 18. Activity will be on 160
to 10 meters using CW, SSB and RTTY with six stations active. QSL
via W2IJ.

TURKEY, TA. Members of the TC Special Wireless Activity Team are
QRV as TC301B until November 17 to celebrate 30 years of the Turkish
Republic of Northern Cyprus, which is recognized only by Turkey.
QSL via the bureau.

VIET NAM, XV. Toshi, JA3NHL and Take, JA6CNH will be QRV as XV2NHL
and XV2CNH, respectively, from Ho Chi Minh City from November 2 to
8. Activity will be on 160 to 6 meters using CW, SSB and RTTY.
QSL to home calls.

VANUATU, YJ. Operators Nob, JA2AAU, Iwao, JA2LSS, Iku, JA2ATE and
Tug, JA2ZS are QRV as YJ0AU, YJ0CJ, YJ0TE and YJ0ZS, respectively,
from Iririki Island, IOTA OC-035, until November 11. Activity is on
the HF bands and 6 meters using CW, SSB and RTTY. QSL YJ0AU and
YJ0CJ direct via JA2ATE, YJ0ZS via JA2ZS and YJ0TE via JA2ATE.

OPERATION APPROVED FOR DXCC CREDIT. The following operation is
approved for DXCC Credit: Afghanistan, T6MH, 2012 and 2013
operations. If you had this contact rejected in a recent
submission, send an email to to be placed on
the list for an update to your record.

THIS WEEKEND ON THE RADIO. ARRL CW Sweepstakes Contest, North
American Collegiate ARC CW Championship, NCCC Sprint, IPARC Contest,
Ukrainian DX Contest, Himalayan Contest, IPARC Contest, High Speed
Club CW Contest and the DARC 10-Meter Digital Contest are all on tap
for this upcoming weekend. The ARS Spartan CW Sprint is scheduled
for November 5. The QRP CW Fox Hunt is scheduled for November 6.
Please see November QST, page 87, and the ARRL and WA7BNM contest
web sites for details.

Nov 012013

Published on CCW reflector 31 October 2013

The design for the PA board is now finished. The Sentry SDR transceiver will use four Mitsubishi RD16HHF1 mosfets in push pull parallel.

I’ve just spent an afternoon measuring the transmit IMD performance of the prototype transceiver both as a transverter driver and transceiver.

The transmit third order IMD of the 1 mW transverter output at full power is -35 dB. At half power it is -48 dB. This checks that the USB sound card, transmit I/Q filter, upconverter and driver amplifier are working correctly and the output is very clean.

Testing the PA at 12V rather than 13.8V the transmit third order IMD at 25W peak output is -30 dB. Running at 13.8V will improve the IMD by a few dB but I wanted to test the worst case scenario.

What do these figures compare to? In recent QST reviews of amateur transceivers an Elecraft K3 had a third order IMD of -27 dB and the Flex Radio Flex-1500 came in at -22 dB.

The tests I’ve run used HDSDR as the SDR software with Spectrum Lab generating the two tone signal of 700 and 1900 Hz using Virtual Audio Cable. Measurements were taken both with a HP spectrum analyzer and a SDR-4+ receiver.

I also tried some digital mode programs generating PSK signals with similar results.

I’ve also run the transceiver and prototype PA on permanent transmit at full power for three hours so it should stand a few RTTY contests!

I should get the PA and low pass filter PCB board designed over the weekend and then it’s just some firmware testing before I can finish the main board PCB design.


Chris, G4HYG

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