2021-05-24

The Electronics Curse

Many years ago I believe I coined the phrase; "The Electronics Curse." This curse like "Murphy's Law" was used to describe the situation where having designed and constructed some circuit, it was tested. Usually with good results and some application for the time. But with some circumstances beyond my/our control, the circuit would go off into the wild blue yonder.

 

The Curse

"Your amplifiers will oscillate, your oscillators won't!" Often described a new circuit on test that did not come close to working like it should.

Sometimes it was a construction mistake. Carrying the output too close to the input. The short but inductive earth wire was making the circuit 'whistle' at VHF. Or the electrolytic capacitor being connected in parallel with a ceramic capacitor. The designer having forgotten the parallel tuned circuit this creates. Or that the audio amplifier was 'tweeting' (Not the new version) and making a sound like a bird repeating at a regular interval.

This last has triggered my writing this. I have for a long time wanted to re-construct the Direct Conversion receiver from 1968 QST magazine. Using modern 'second used' components. That is a polite way of saying scrounged from junked electronics.

The circuit is this one:-


[You may remember this circuit from The Anode March 2021

Using modern transistors I constructed the circuit of the audio amplifier. Using scrounged capacitors and new(ish) resistors, I built the circuit on Vero like board. This even in the 60's was the quick and easy way of putting a circuit together. Also disliked by R.F. engineers it would provide a path for R.F. feedback of the bad variety. Producing a PC board is out of the question. Cost alone makes this out of the reach or of no interest to most people round here.

What the three transistor circuit was doing, was doing, was oscillating at several MHz. Which was charging/discharging the electrolytic capacitors at audio. 

The resulting 'squawk' was disturbing the cat! I had the output connected to one of the small PC amplified speakers that people threw away.

When I got to the back of the board I found the trace that I had forgotten to cut, was running past the input. So I cut the trace along with a few others for good measure. Switching on, the circuit was quiet. No longer disturbing the cat. And a gentle background hiss said the circuit was sensitive enough to use.

This all is not surprising as modern (1990's) transistors have a much higher transition frequency (FT) than the 1960's ones. So much more gain at VHF and H.F. So a small amount of capacitance and lots of gain add up to instability and oscillation.


So the next step is to place it in a screened enclosure.

The next step in the project is to try out some cores for the mixer. These will have to be 'cheap'! Lets see how the Amidon and Micro-Metals perform vs the old Mullard/Philips types.

 


2021-05-03

yl.beam #94 may 2021

Contents  

  • YL Recipients of  SARL Awards  2020
  • Missing copies of Radio ZS
  • Mexico – Women's Day 2021 Results
  • Reunion Island
  • Golden Wedding Anniversary for Rosel DL3KWR & OM, Hardy DL3KWF
  • Kartini Day   celebrates Indonesian Women
  • DX222 YL Net ANZA NET ALARA  Echolonk
  • Cathy Purdie ZL2ADK - Obituary  
  • Silent Keys
  • Contact & Dates

YL Recipients of SARL Awards and Trophies for 2020  (South Africal Radio League)
Source: Dennis Green, ZS4BS SARL Secretary -  Radio ZS - March / Maart 2021  [p29-30]
At the Council meeting of 16 February 2021, the 2020 the awards were approved.

Radio ZS Shield - awarded by the Editor of Radio ZS to a SARL affiliated Club or member who best supported Radio ZS during the year. Heather Holland, ZS5YH – YL.Beam  &  Daniel Romila, VE7LCG – various articles

The Brian Jones, ZS6BV, SOTA ZS Award - awarded by SOTA SA to the ZS amateur who contributed most towards the SOTA ZS programme in the past year.   Marie Grobbelaar  ZS4MG and her OM Chris, ZS4CGR 

The Class B RAE Certificate - awarded by Council for the highest marks in the Class B RAE
Kiara McLean ZU1ISS

The AKYAB Trophy - awarded by the Contest Committee to the SARL member who, in his/her first year of licensed activity, achieves the highest score during the annual HF Phone Contest. - Veronica Kotze, ZR6TVK  and
The Fred Mills Trophy - awarded by the Contest Committee to the SARL member who achieves the highest score during the annual HF Phone, Digital and CW Contests, who has never won a SARL HF Contest Trophy before: Veronica Kotze, ZR6TVK 
The SAWRC Trophy - awarded by the Contest Committee to the YL SARL member amateur who achieved the highest aggregate score in the three annual South African Radio League HF Contests - Veronica Kotze, ZR6TVK

SARL Certificate of Recognition
Mrs Mel Gwilt – PEARS  (Port Elizabeth AR Society)
Mrs Santjie White - Aeronautical Rescue Coordination Centre
Marjoke Schuitemaker, ZS5V  – SA Maritime Mobile Net

Your editor took the liberty of extracting only ladies awards. Well done all.


Missing copies of Radio ZS
Anette Jacobs, ZR6D has been searching for and collecting copies of Radio ZS. She then scans the magazines and sends it to the SARL Secretary to upload to the League web site. Gert Botha, ZS6GC has created a Radio ZS Index from 1925 to the present issue.
Anette, ZR6D and Gert, ZS6GC are busy with the Radio ZS project to get a complete set of Radio ZS magazines digitised. And then have the Radio ZS Index updated. They are looking for copies of October 2001; April 1975; June 1972; September 1962; June 1960; May 1955; January to June 1951; August to December 1951; February and March 1950; May 1948; January to June 1947. Then 1925 to 1946 excluding November 1925. If you can assist then, please contact them at jhjacobsza@gmail.com and/or gertb@cybersmart.co.za.
http://www.sarl.org.za/Web3/DocumentStore/20210416094105QeYfMSzx0t 

Mexico – Women's Day 2021 Results
A special congratulations to the winners of the XE-YL Contest 2021:
1st. place: XE3TDC Tila del Carmen of the State of Tabasco.
2nd. place: XE3 ECP Edith Cobarrubias of the State of Tabasco
3rd. place: XE1LOV Luz Ma. Ortiz of the State of Mexico
The certificates of participation for those who sent their log are now available on the event page
http://xeylcontest.puebladx.org
 Contest Manager XE1SPM    Patricia Mohedano Téllez   8/04/2021

Reunion Island
Phil, F5TRO and XYL Ann, F5BSB will be new arrivals and permanent residents on the island in May 2021.  Their call signs will be FR8UA and FR8TZ, respectively.
They will be active on all bands & modes.. HF Happenings 942,  29 March 2021



Golden Wedding Anniversary for Rosel DL3KWR & OM, Hardy DL3KWF
DX News Dec 2020 - In the extreme last year my OM, Hardy DL3KWF, and I were lucky that we could twice go abroad. In the March we were on Madeira and operated as CT9/ homecall again on the air before pandemic really hit. In the September it was possible to go by car and ferry to Denmark. So we could participate in CW part of the Scandinavian Contest. TNX Inger’s (OZ7AGR) permission I could activate again OZ6SYL. Of course we visited Inger and Bjarne in Solrød. We were going to the beach and we were reminded of the wonderful SYLRA Meeting in 2013. Hardy and I were amazed that so many people had joined them at the official welcome.
On the 19th December was our great day: our Golden Wedding Anniversary. We were alone on account of Corona but happy that we both live to see this day. We hope that we can make up the celebration with our family in the new year 33 Rosel DL3KWR    
 ▪ ALARA Newsletter Issue 177 April 2021 Page 3 

Kartini Day   celebrates Indonesian Women
21 April, Indonesians commemorate Hari Kartini (Kartini’s Day).  An Indonesian national holiday, akin to International Women’s Day, the focus is the issue of women empowerment.
Ibu Kartini’s was born  21st of April, 1879  and even though she died at only age 25, Kartini is hailed as Indonesia’s first feminist. Her desire to see women freed from repressive laws and beliefs made her a heroine.
 ORARI  (Organization  Amateur Radio Indonesia) with  the Amateur Woman Radio Indonesia (WARNA) held a Special Event Station 8A21A in Commemoration of Kartini Women's Emancipation 2021.  As many as 769 Stations from all over the World responded
ORARI in  Bali  held a Special 80m Net in commemoration of  KARTINI Day 21 April 2021, with yl  controllers  (YC9CCU, YC9BFQ and YC9BDT).

DX222 YL Net
As propagation is ever so slowly improving we thought it might be a good idea to re-instate the DX222 YL Net this year. It used to run on a Monday at 0530UTC on 14.222 MHz June, VK4SJ was one of our earlier net control people but is not able to be net control.

So, this is a plea for the YL HF operators amongst you, anywhere in the world, to have fun on the air. safe, Shirley VK5YL, ALARA NEWSLETTER   January 2021 Issue No. 176


ANZA NET 14.183Mhz 0515 UTC Daily

Ladies Day is now held on Thursdays each week. Net controls are Lyn VK4SWE when available and Shirley VK5YL and is usually followed by ROTA (Recipes on the Air). These YLs (and OMs) would love to hear some new voices. Join in

ALARA NEWSLETTER   January 2021 Issue No. 176

ECHOLINK SKEDS ON THE ALARA CONFERENCE STATION
ALARA Conference Station - IRLP node is 9509

YL Downunder Net - 4th Thursday of the month at 0500 UTC. Shirley VK5YL is net control.

ALARA Monday night nets - The net runs every Monday night with the 1st and 3rd Mondays on EchoLink.  All of the Monday night nets are HF (80 M 3.570 MHz) Times are Summer– 1030 UTC, and Winter— 1000 UTC. (See Roster page 2 for dates and controller) YLRL Weekly net - 0100 UTC every Friday. Net control is usually Catherine AC4YL Minnows net - 0230 UTC every Friday. Net control is Margaret AE7MB We usually operate the ALARA Conference station for our committee nets as well.

Other Nets

VK3 Net - Join Jean VK3VIP at 0800 UTC on Tuesday summer evenings on VK3RMM repeater 147.250 Mhz (Mt Macedon). Winter evenings 0900 UTC.

Ann Renton Memorial Net - Runs fourth Tuesday each month, 146.50 MHz at 0930 UTC from TARC (Townsville) VE3TTT-R Minnie’s Net - This station is set up to receive EchoLink stations as well as 2 meter check-ins. Minnie VE3DBQ is net control for this sked which happens at 2130 UTC on every second Wednesday, the next one 21st October (early morning of 16th July for Australia) then every other week after that.

ALARA NEWSLETTER   January 2021 Issue No. 176

Obituary  for Cathy Purdie ZL2ADK





 

 

 

 

Jen VK3WQ & Cathy Purdie ZL2ADKBrisbane1999

27 Mar 2021, attached an obituary I wrote for the ALARA column in Amateur Radio (Australia) magazine about Cathy Purdie ZL2ADK who passed away a couple of months ago.  Cathy was my sponsor into NZ WARO and we were friends for around 30 years.    33/88 Jen VK3WQ

CATHY  PURDIE  ZL2ADK SK    15.10.46 - 10.2.21
Many of you who have attended some of our past ALARA meets will probably remember Cathy ZL2ADK and her OM Brian ZL2ADL. I first sponsored Cathy into ALARA and she sponsored me into WARO (the New Zealand Women Amateur Radio Operators organisation) in October 1982 ... 39 years ago!
Cathy and Brian attended their first ALARA meet in Perth in 1996, the only one I haven’t attended, but we did finally meet face to face in Brisbane in 1999. She and Brian also went to the 2nd Mildura ALARA meet in 2005, after which I drove them back to Murray Bridge where they stayed with me for a few days.
More recently they attended the Nelson Bay meet in 2014 and Cairns in 2017.
I would like to share some of my memories (with a little help from an old WARO Newsletter) of this amazing woman’s activities and achievements.
Born and educated in Wanganui (NZ), Cathy went to Palmerston North for her tertiary education to become a teacher. She and Brian raised a family of four plus one foster child; four girls and a boy.
Cathy was first licenced in 1979 as ZL2NAT, and believed that she was the first YL Novice in New Zealand. Not long after that she passed her Grade 3 exam and became ZL2TZR. In 1980 she passed her Grade 2 Morse, becoming ZL2ADK, and in 1981 the Grade 1 exam.
I will try to précis Cathy’s other amateur activities and achievements.
After obtaining her licence, Cathy served for several years on the WARO executive, taking many positions which culminated in her becoming President. In 1985 she was elected to the NZART Council where she served for 10 years. After a short break, she did another two years from 1997 to 1999. During this time she was asked to do a WARO segment on the NZART Broadcast each month, and she did this for 10 or 11 years.
She was a member of the Wanganui Land Search and Rescue Organisation for over 20 years (as at 2013) and served for a time as Deputy AREC (Amateur Radio Emergency Communications) Section Leader for their local Marton Branch 23.
Cathy was part of a group of  YLs who first put the WARO callsign  ZL2YL on air, for a National Field Day, operating under Branch 19 Inglewood. They were accused of being “Pirates” several times, but after it was realised that they were genuine, it became a busy and fun weekend.
She was honoured to be made a Life Member of WARO in 1985.
In 1989 Cathy and Brian did their first overseas trip to the YLRL (Young Ladies Relay League – America) Convention in Hawaii and she was part of the committee that arranged the YL International gathering in Wellington (NZ) in 2000; and later attended a YL International Meet in Sicily.
Cathy will not only be missed by her many friends and relatives, but also by the many organisations to whom she willingly gave her time and energy. She passed away on February 10th 2021, after a long battle with cardiac problems and cancer.
Post Script: Cathy’s funeral was held on Tuesday 16th of February, in Palmerston North, and I was humbled and pleased to be sent the information to receive the streaming of it on-line. There were 100 people in the chapel, according to the COVID regulations, and the overflow of people were watching it in the near-by Scout Hall. A recognition of all the people whose lives she had touched.
Our deepest sympathy goes to Brian and the family.
Vale dear friend. Cathy ZL2ADK.
alara.org.au ▪ ALARA Newsletter Issue 177 April 2021 Page 14

Silent Key     VE1VCI  Merle Taylor, Canada  Died 22/04/2021 She was 98.  


















Fred and Merle on their wedding day, which was also Merle’s twentieth birthday. You can see their matching red shoulder badges with rays of electricity, showing that they were both in Communications.  

VE1VCI  Merle Taylor,  August 2, 1923 – 22 April, 2021
Merle had just turned sixteen when war was declared in September 1939
In 1942, when Merle was 19, she saw an opportunity to apply to be a Wireless Operator in the Royal Canadian Air Force, Women’s Division. She was hired and her main responsibility was Morse Code.
After her training, Merle was sent to Number 1 Wireless School in Montreal. There she learned how to use Morse Code, how to signal using lights and flags, as well as other theoretical classes such as the components of a radio. She taught the code to pilots through the British Commonwealth Air Training Plan
On her twentieth birthday August 2, 1943,  she married Fred Taylor
In 1986 Merle passed the exams necessary to become a ham radio operator – receiving a mark of 100 percent on the Morse Code test. She set up her radio system in her basement and  communicates with people around the world, both through voice and Morse Code. During the 1980s, she even won the provincial annual amateur radio competition.

More about this remarkable woman's  life, with pictures, on the sites listed below:
 veteran CW operator – Amateur Radio Newsline Facebook  24/02/2021
https://www.saltwire.com/lifestyles/regional-lifestyles/emilie-chiasson-meet-merle-taylor-from-teaching-soldiers-morse-code-to-running-a-far
https://www.cbc.ca/news/canada/nova-scotia/merle-taylor-morse-code-remembrance-day-1.3846368
https://www.elinorflorence.com/blog/merle-taylor-morse-code/?fbclid=IwAR393UJAP9xLucgVW4XqMYedn8CYkjyLyW4WEGJmLKb9f2Nr2CHP1U2JTs
Merle Taylor: Maven of Morse Code July 20, 2016
Val Lernko, VE5AQ/VE5ACJ wrote an article in the  November/December 2010 issue of TCA (The Canadian Amateur) Magazine.



Silent Keys
KB7VOX Patricia J Painter OROFINO, ID (USA) died 7 April 2021.
Born 1948 Patricia was married to W0OVL Steven Painter for 54 years.  Condolences.

 HK4NBS Silvia Betty Jaramillo   died  07/04/2021
Condolences to her om HK4HRA  Mario de Jesus  Arango  Palacio, from  Medellin Antioquia, Colombia Liga de Radioaficionados Medellín

Ingrid Burk DL3SAR Died   7 December, 2020,  age of 87
Ingrid was regularly qrv in the 80m YL round on Wednesdays, also from her 2nd residence in southern France under F5VDO. Every year she visited the HAM-Radio in Friedrichshafen and many YL meetings of our 80m round, most recently in 2017 in Weinheim. Ingrid was a member of the OV Leonberg / Rutesheim, P24, for over 35 years, a member of the YLRL and the INTERMAR amateur marine radio association.
Our condolences go to their OM Herbert, DJ2OV and their large family.
Gertrud Szyza, DK8LQ https://www.darc.de/der-club/referate/aktuelles/

 CONTACT  US:  https://web.facebook.com/ham.yls?_rdc=1&_rdr ‘HAM YL'
  yl.beam news:  Editor Eda zs6ye.yl@gmail.com    
Earlier newsletters can be found on the website of WEST RAND ARC
 wrarc-anode.blogspot.com     &   https://wrarc-anode.blogspot.co.za/
and:  Italian Radio Amateurs Union: QTC U.R.I.
also @ https://www.darc.de/en/der-club/referate/yl/      (erman ARC)

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Calendar May 2021

May 1        BYLARA  AGM 2021 Online

May 3        ALARA  AGM 1030 UTC ALARA EchoLink Conference Station and on 80M

May 9        JLRS YL CQ Day  SUN, 9:00 AM UTC+09 – 4:00 PM UTC+09 (2nd Sunday

 
May 9        Mother’s Day

May 15 -22 AGCW (Activity Group CW) activity week

May 29-30  CQ WPX CW contest

May 29-30  Day of YL's Memorial  2021  29th May 00:00hrs to 30th May 23:59 hrs in memory of F5ISY - Carine DUBOIS  ka1uln.blogspot.