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SPECTRUM http://www.qsl.net/zl1bq 1 Vol 54 October 2017

SPECTRUM October 2017 Vol. 54 No. 09

The Official Newsletter of the

Auckland VHF Group Inc.

Spectrum

Last meeting report and photos See page 4

Our Clubrooms celebrate 45 Years!

See page 10 for details.

SPECTRUM is the official journal of the Auckland VHF Group Inc. Opinions expressed are those of the authors and do not necessarily reflect club points of view. The closing date for SPECTRUM articles is by the 1st of

each month. Articles to be submitted to the editor Peter ZL1UKG [email protected]

Office Name Call sign Home Work / Mobile E‐mail

President Vacant

Vice President Dave Dingley ZL1TIA 828 9394 [email protected]

Secretary Vacant

Treasurer Vacant

Committee George Raffles ZL1TUX 626 6944 021 735 361 [email protected] Brendon Reid [email protected] Peter Loveridge ZL1UKG 377 3398 [email protected] Greg Storz ZL1GSG 849 2878 Darryl Grange ZL1TCI 817 4553 AREC Section Leader Laurie Mathews ZL1ICU 634 5130 0274 817 463 [email protected] Deputy Section George Raffles ZL1TUX 626 6944 021 735 361 [email protected] ZL1BQ Trustee Vaughan Henderson ZL1VH 418 1071 021 844 804 [email protected] Repeater Trustee Vaughan Henderson ZL1VH 418 1071 021 844 804 [email protected] Klondyke Managers ZL1VH / ZL1BK 690 Manager Dennis Seymour ZL1UET 278 0381 850/670 Manager Vaughan Henderson ZL1VH 418 1071 021 844 804 [email protected]

ATV/Beacons

Spectrum Editor Peter Loveridge ZL1UKG 09‐4276362 [email protected] Trading Table Vaughan Henderson ZL1VH [email protected] Hon Auditor Raequel Probine 630 8044 Webmaster Terry Corin ZL1BPA [email protected] Club Web Page: http://www.qsl.net/zl1bq ATV Interest Group: http://www.qsl.net/zl1qf/atvug/ATVusers.html ZL1VHD Dstar gateway administrator; Laurie ZL1ICU 634 5130 0274 817463 [email protected] Dstar gateway registration URL: http://zl1vhd.dstar.org.nz


Auckland VHF Group Inc. Branch 66 NZART

PO Box 10138, Dominion Rd, Auckland 1446 Clubrooms: 30 Hazel Ave, Mt Roskill

Club News and Net: The combined Auckland VHF Group and Auckland Regional Branch News and Net are held on 146.625 MHz and 439.875 MHz at 8.15 pm each Sunday or after the ZL6A National Broadcast on the last Sunday of the month.

Club meetings are held at the Clubrooms at Hazel Avenue, on the second Monday of each month at 7.30 pm. For other details, listen to the News and Net each Sunday evening.


Auckland VHF Group (Inc) Branch 66 General Meeting Notice

Monday 09th October 2017 7.30pm,

At the Hazel Avenue Club Rooms

(Located on left at the end of Hazel Avenue)

The Evenings Subject:

“Battery Technology”

Presenter Gary Chapman’s talk will encompass his years of experience in the area of leading technology battery systems. Gary is National Sales Manager for GNB Industrial Power who provide state of the art solutions to the energy storage market from off grid solutions to critical power backup applications. Come and learn about large capacity Pb and Li-ION technologies and their uses in the energy storage market, electric vehicle, telecommunications, UPS and marine power solutions.

EVERYBODY WELCOME

Coming Events: Saturday October 7 and Sunday October 8 - Weekend Ham Radio Class at

400 East Coast Road, Mairangi Bay. Contact Julian Dukes ZL1ABX ([email protected]) for more information.

Saturday 7 October and Sunday 8 October Microwave Contest: All bands 32 cm and up.

Saturday October 14 - Come and help celebrate 45 years since our clubrooms opened. From 1pm at the Clubrooms, Hazel Avenue.

Saturday 4 November - Western Suburbs Branch Used Equipment Sale at Rosebank School Hall. Venue open for sellers from 8am. See page 16.

Monday 13 November— VHF Group Annual General Meeting, 7.30pm at the clubrooms, Hazel Avenue. See page 18.

Saturday December 2 and Sunday December 3 VHF Field Day Contest: All bands 6 m and up.


2017 Show and Tell – September General Meeting Projects that our members have been working on over

winter

There was a good turn-out of six members who gave presentations covering mixture of hardware, software and sketches to describe what they have been up to. They are listed in the order that they were called to present. Adam Cumberlege ZL1CCA Adam has had a software career covering 30 years, the last 20 of which have involved Microsoft which he prefers to forget. In 1984 he was engaged to develop some hardware that could compress the data volume coming from scans of A0 paper size engineering drawings. Using a multi-user mini-computer of that time, it took 25 minutes to carry out this task. A scan line contained 4600 dots and compression required white and black dot strings to be counted for compression. A supervisor function initiated PAL operations on Input received from the scanner, Compression and Output to a SCSI Bus functions leading to a 80286 PC to record the compressed data. PAL’s (Programmable Array Logic) were like meshes where junctions could be addressed and the joins burned to go open effectively making them programmable logic that could execute independently. The end result was 10 times faster than serial instruction processing in a conventional programming language. All of this was built using wire wrapped logic. It looked a real work of art.


Greg Storz ZL1GSG Greg is by profession an electronics engineer working in the field of Radar for Marine applications. Experience gained at work has made Greg familiar with techniques that can be applied to amateur frequencies. The problem is that current devices are becoming progressively smaller as the frequency rises, making it hard for those who don’t have access to an SMT assembly line to replicate his work. Greg showed transverters for 3.4 GHz and 925 MHz, both amateur bands that are underused at the moment. If copies of them were available there would be more than just two names in the contest logs and a wider range of path lengths to test the capabilities of the antenna, site and propagation. There was also a 1 W in, 150 W out linear for 70 cm using four Mitsubishi power blocks with splitters and combiners to manage the load sharing. The hardware design and prototype construction looked impeccable.

925 MHz and 3.4 GHz transverters 150W linear amplifier Graham Hay ZL1GH Graham is getting back into an early interest from childhood with an educational kitset radio. His career involved electronics and physics study and working with radars and then software since 1969. He has worked in Asia and speaks Mandarin. He is now writing in Erlang. This is a proprietary language developed within Ericsson and lends itself to being distributed in multiple processes, fault-tolerant, highly available and hot swappable where code can be changed without stopping the system.


It influenced the development of Elixir which can be used to sit over the top and control lower level processes. Graham is using Elixir to manage an array of quad core Raspberry Pi processors doing all sorts of different tasks. This sort of capability is being used to develop smart flight control in aircraft which will take over from humans in ground control (1090 ADSB). In addition to this work, Graham is using GNURadio software and experimenting with a number of other SDR development tools including GQRX and SDR Sharp. GNU Radio is a free & open-source software development toolkit that provides signal processing blocks to implement software radios. It can be used with readily available low-cost external RF hardware to create software-defined radios, or without hardware in a simulation-like environment. It is widely used in hobbyist, academic and commercial environments to support both wireless communications research and real-world radio systems. Gqrx is a software defined radio receiver powered by GNU Radio and the Qt GUI toolkit. It can process I/Q data from many types of input devices, including Funcube Dongle Pro/Pro+, rtl-sdr, HackRF, and Universal Software Radio Peripheral (USRP) devices. SDR Sharp is a small and fast PC-based DSP application for Software Defined Radio. It’s written in C# with both object design correctness and performance in mind. The main purpose is to offer a simple proof of concept application to get hands into DSP techniques. Supported devices include AIRSpy, SoftRock, FiFiSDR, FUNcube Dongle, FUNcube Dongle Pro+, I/Q wav files, SDR-4, LazyDog’s LD-1, SDR-IQ, SDR-14, RTL2832U / RTLSDR (external) and any sound card based SDR front end.

It’s difficult to do justice to Graham’s presentation in a few short words.

We hope to have Graham back on another occasion next year to hear and learn more about his work and experimentation with software defined radios.

The photo shows part of a screen shot from the GNURadio software development tool.

More information at: https://www.gnuradio.org/


Ross Hannah ZL1EME Ross lives in a valley which limits the angle at which he can see the moon. To get around this he has built a tilt-over mast for his 4.5 m dish on a neighbour’s property. The tilt is required to not disturb another neighbour’s view. The earthworks and mechanical design were described followed by the shed containing power source on the roof and electronics inside which can be remotely operated from his house some distance away.

Initial foundation works and tilt over mast.


Peter Loveridge ZL1UKG Peter has an interest in antennas and has seen antenna ranges at US conferences where AM modulated carriers are used and at the antenna a simple detector and instruments like an HP415E tuned voltmeter are used to compare antenna gains. A 48 MHz TCXO was seen in one of the flea markets which he had to have as the beginning of his signal source. The construction method was to use folded transmission lines made out of scraps of PCB material rather than inductors. The folding was achieved by scoring the surface with otherwise worn out gig-saw blades where a few teeth at the end are still sharp. The cold end of the line is at ground-plane potential and a 3 – 10 pF trimmer tunes the line to resonance. Inter stage matching is very easy. Just choose how far from the cold end you want to connect. The length ratio is just like a voltage ratio. The oscillator drives a harmonic generator stage followed by a double tuned filter. The coupling of the filter was adjusted by choosing an appropriate spot to connect the filter arms with a 2.2 pF capacitor. Close to the hot end leads to wide over coupling, close to the cold end give high Q and high insertion loss. A second stage is a simple amplifier where the bias is modulated at 1 kHz to produce an AC signal at the far end of the range which is easier to amplify with the required stability. Having got the TX going a companion receiver of TRF design will be built for the next Show and Tell.

Basil Orr ZL1TOW Basil owns a yacht and has conventional marine instruments on a NMEA-183 protocol bus. The irritating feature of his depth sounder is that the depth alarm can be falsely triggered by small changes such as the wake of a passing boat being interpreted as running aground. Basil has been inspired to learn a new language and is writing “C” to parse the NMEA data, picking out the depth sounder messages and apply logic to the interpretation so that the depth alarm will work the way he thinks it should. Apologies to Basil—no one managed to take a photo during his presentation!


VHF Group General Meeting Minutes : Monday 11th September 2017 Held At: Auckland VHF Group Clubrooms 30 Hazel Avenue, Mt Roskill.

Attendance: As per attendance book containing: ZL1VH, ZL1TUX, ZL1TOF, Brendon Reid, ZL1AYV, ZL1CCA, ZL1UKG, ZL1GSG, ZL1TOW, ZL1TCI, ZL1KG, ZL1GYM, ZL1TRW, ZL1TDG, ZL1AAR, ZL1EME.

Apologies: ZL1TIA, ZL1TAY, ZL1AOX, ZL1SK Moved apologies be received: Brendon Reid Seconded: ZL1CCA

Start of Meeting: 07:45 pm Meeting Chaired By: Vaughan, ZL1VH Minute Taker: George, ZL1TUX

Minutes of Last Meeting: The General Meeting Minutes of 14th August 2017, as published in the September 2017 issue of Spectrum are taken as circulated and read: Any Changes to the Minutes: None. Minutes taken as correct. Moved: ZL1TUX Seconded: ZL1GSG

Matters Arising: None.

Correspondence IN: Branch 29 newsletter (the 29-er) Auckland Council Lease, returned as Seal was attached, but no Signature. Correspondence OUT: None

Accounts: None received

General Business: 1. Clubrooms update: Two doors with borer in them have been replaced. Clubrooms cleanup, and maintenance will be carried out on 17th September 2017. Guttering cleaning and fixing, back wall by shack gib and stopped, doors and surround under building need attention.

2. Club Open day celebrating 45 years at Hazel Ave, 14th October 2017. (Time to be discussed).

Require Photo's and information on the Club building. Invite Community board, neighbors.

Business Meeting Closed: 8:05 pm

The meeting was then given “Show and Tell” presentations by the following: Adam ZL1CCA (PAL hardware signal processor) Greg ZL1GSG (Microwave transverters and power amplifier) Graham ZL1GH (Software tools for SDR) Ross ZL1EME (Remote EME dish) Peter ZL1UKG (Stripline low power oscillator) Basil ZL1TOW (Improved depth alarm for yacht)

Trophy was won by Adam ZL1CCA for his show and tell . (Jack Flower Memorial Trophy)

Meeting closed at 9:15pm. Supper was then served.


A MOMENT IN OUR HISTORY The time - 2 p.m. The day - Saturday, 21st October, 1972. The place - Hazel Avenue, Mt.Roskill, Auckland. The occasion - the opening of the clubroom of the Auckland VHF Group, alias Branch 66, N.Z.A.R.T. Those present - Mr A.J. Faulkner , M.P. for Mt.Roskill, Mr Ken Elliott, ZL1TQ, on behalf of the Post Office, Mr Derek Cleland, ZL1IY. President of N.Z.A.R.T., Mrs Marion Lister, ZLIBKL, President, Auckland VHF Group and some 60 assorted supporters of the VHF cult. The weather - perfect.

Bill Raffles, ZL1AYV, Master of Ceremonies for the occasion opened the proceedings by welcoming everyone and introducing the distinguished guests. Flowers were presented to Mrs Faulkner, Mrs Elliott and Mrs Cleland, after which Marion reviewed the history of the Group from its formation in 1956 to the culmination, in today’s ceremony, of many years of fundraising effort. A particular welcome was extended to ZL1CW and ZL1AMN as life members. Marion concluded by restating and re-affirming the aims of the Group.

Derek congratulated the Group on its very fine clubroom and expressed the hope that it would lead to ever increased activity and foresaw the day when, through a nationwide chain of F.M. repeaters, the VHF enthusiasts would play a vital role in emergency communications. He then unveiled a name plate which suitably identifies the building.

Representing the Post Office, Ken Elliott, who it was noted, has a “T” call, spoke of the infiltration of that organisation by Hams ranging from ZL2AZ to ZL1TDR. He referred to the happy working arrangements between the Post Office and N.Z.A.R.T. and trusted that in this anti-establishment era there would be no reason to change this. In passing Ken mentioned that some 25 years ago he and Ron, ZL2GQ held the record for a QSO on 166 MHz-- it was under 2 miles. He saw in VHF-ers more of the old ham spirit of experiment and home-brewing than is apparent on the DC bands.

In introducing Mr Faulkner, Bill Raffles expressed the hope that, one day, it might be possible to infiltrate Parliament as well as the Post Office. Mr Faulkner apologised for the unavoidable absence of the Mayor and said he spoke for both in welcoming the Group to the Borough. He said that it was a thoroughly good thing that all interests should be catered for and particularly one that offered a service to the community in return. He noted the need for improved international communication and the part amateur radio could play in this. After wishing the Group well and confessing that his Morse was not what it was, Mr Faulkner pressed a key and successfully detonated a long balloon which, stretched across the doorway was barring entry.


Nearby the Mt. Roskill Scout Group were encamped for J.O.T.A. weekend and the boys did a great job in serving afternoon tea. Mrs Cleland cut an appropriately decorated cake and the QRM swelled to S9 plus. Marion ZL1BKL hushed the gathering long enough to read a letter from Gemini Electronics which donated to the Group an FRDX400SD. From the reaction it would seem that SD means Super Duper. By this time it was 3.30 p.m. and away went the transmitter hunters leaving the Scouts to clear the debris and do the dishes.

By the way, there is no truth in the rumour that the Auckland VHF Group has been the subject of a take-over bid by W.A.R.O. Even if new secretary Margaret, ZL1TQD has joined President Marion, ZL1BKL, and treasurer Carol ZL1AJL, on the executive.

Jumbo ZLlHV

Reprinted from Spectrum V09 No 05 October-November 1972

Photo of the clubrooms in McCormack Road, Mt Roskill before being relocated to Hazel Avenue. In the photo L to R are Margaret Raffles ZL1TDB, Margaret Raffles (now ZL1AYV), Bill Raffles ZL1AYV, Ron Harvey ZL1TBM, Murray Greenman ZL1BPU and John Watson ZL1TIQ.


Clubrooms Working Bee Sunday 17 September was the date for a working bee at the Clubrooms in Hazel Avenue. As reported last month, we recently replaced two internal doors that had borer infestation. This left a section of plywood panelling with the familiar pattern of tiny holes and fine dust on the carpet. We also needed to give the guttering a good clean out, repair a broken section at the back east end and replace some other rotten timber either side of the small under-clubrooms access doors. Just the right number of people turned out for the day: Greg ZL1GSG, Adam ZL1CCA, Darryl ZL1TCI, Vern ZL1TDG, Ross ZL1EME and Vaughan ZL1VH. Greg brought along a wheeled scaffolding platform which turned out to be the perfect height for work along the back of the clubrooms. Adam climbed up to have a look and decided that water blasting the guttering and part of the roof was the way to get the accumulated leaves and dirt out. The water blaster also turned out to be the right tool to clear the downpipes. With Greg and Adam in action, the rest of us turned to the work needed inside. Pulling the plywood panel off turned out to be very easy and the framing underneath was in good condition. Taking a look at the exposed wall, it was decided to also remove an unused door (used to be access to a second toilet until the adjoining wall was removed to make a larger radio operating room). Thanks to a good selection of tools on the job, the shelving above the door area and the door frame were quickly removed. Ross ZL1EME measured up and took off to buy the necessary timber and sheets of Gib board for re-cladding. The rest of us attended to cleaning up the exposed wall, removing nails, trimming the carpet back, generally preparing for the new wall cladding. Ross soon returned and work got underway framing up the old door opening and with assistance from Darryl, fitting the new Gib board in place. Meanwhile, outside, Adam had finished his gutter cleaning so we moved the scaffold platform back to where the broken guttering needed repair. Greg set to work, having gone to get the required joiner, and soon had a new section of guttering in place including an expansion joint which should stop the gutter breaking again in the near future. Before dismantling the scaffold platform, we dragged it around to the east end of the clubrooms and made sure the gutter was clear along that side as well. Vaughan got onto the container roof and cleaned out the west end gutter and with help from Vern, did a bit of weeding and cleaned out the downpipe soak holes. Inside, Ross and Daryl completed the Gib board work and cut trim along the bottom of the new wall section. After removing the left over rubbish, the last of the working bee people left at 3pm. A good day’s work. We still have to stop, sand and paint the new wall section, fit some moulding along the top and re-fit a wooden strip which is a feature of the interior. Other work needed at a future date will be to repair the small double doors which give access under the clubrooms and line out the other side of the wall in the operating room.


Adam ZL1CCA in action with the waterblaster. The break in the gutter can be seen in the left hand picture. The excellent scaffolding platform came via Greg ZL1GSG and was perfect for the job.

Greg ZL1GSG in action with the gutter repair job.


Darryl ZL1TCI removing the redundant door frame. On the right, the damaged plywood panel has been removed.

Just visible on the bottom right of the picture is the new door into the radio operating room.

Prior to this work, all the data books and shelving above the doors was removed. This shelving will probably not be replaced.

Ross ZL1EME and Darryl ZL1TCI inspecting the existing wall framing before measuring up for the new materials.


Top left: Ross ZL1EME arrives back with the framing timber and Gib board. Adam ZL1CCA supervising!

Above: Set up and ready to cut the framing to size.

Left: First sheet of Gib board in place with cut-out for the light switches nearly in the right place!

The wall opening was a little wider than the standard sheet width of 1200, so a narrow strip had to be cut to fill the gap by the door.

Volunteers welcome to help finish off this job—Gib stopping, fit scotia, trim, sand and paint!


Get Ready Week The week, which starts 9 October this year, is an opportunity for MCDEM, CDEM Groups, partner agencies and other organisations to focus on public education and preparedness activities.

This year the theme for Get Ready Week is Stay Safe, Stay In-formed. We'll be promoting the different ways people can stay informed during an emergency – which radio stations to listen to, which websites and social media to follow, the importance of getting to know your neighbours and checking if you can receive Emergency Mobile Alerts (see above).

Over the coming weeks, we’ll be adding resources for you to share during Get Ready Week 2017. You can find out more at www.civildefence.govt.nz. If you want further information about how to get involved or have any questions, email [email protected].

Western Suburbs Used Equipment Sale

Rosebank Primary School Hall, 217 Rosebank Road, Avondale

Saturday 4 November—sellers 8am, buyers 9am

Tables $10. Bookings to Merv ZL1SK phone 09 828 7174 or 0274 990 262 or email [email protected]

There is a $2.00 entry fee for all buyers. Tea, coffee and food available on site. Sale will finish at 12pm.

This is an ideal venue to dispose of silent key estates and other items of interest to your fellow amateurs.

925 MHz Transverters Your VHF Group is planning on producing a small number of transverters for the 925 MHz amateur band (33 cm) based on a design by Greg ZL1GSG. The transverter will have a 2m I.F. and produce approximately 2 watts of output. Due to the state-of-the art design and construction using small SMD components, the transverters will only be offered as completely built up units.

At this time the price is expected to be about $300 each. To gauge the demand for these, please let Vaughan ZL1VH (contact details on page 2) know as soon as possible. An initial run of four transverters is planned.


Developing a New Zealand 5G Spectrum Roadmap

Radio Spectrum Management is thinking about spectrum for the next generation of mobile network, namely “5G”. As the next step, we will be holding industry workshops to discuss views on 5G requirements, possible 5G applications and 5G spectrum demands in New Zealand. These discussions will inform the development of a New Zealand 5G Spectrum Roadmap and development of government policy on 5G. Formal consultation on the Roadmap will be held towards the end of this year.

These workshops will run in the morning of:

25 October 2017 in Wellington (MBIE, 15 Stout Street) 27 October 2017 in Auckland (MBIE, 45 Queen Street) 31 October 2017 in Christchurch (Commodore Hotel, 449 Memorial Ave)

We may run additional sessions in the afternoon of these days if the level of interest in the workshops at the respective location(s) is high.

If you would like to attend a workshop, register online before 18 October 2017.

Garage Sale Garage sale at the late Ken Duncan ZL1ALN's QTH Sunday 8th October 10.30am start. Address is 2 Marsh Street, Milford.

Notice of Annual General Meeting

Members are advised that the Annual General Meeting of the Auckland VHF Group Inc., will be held on Monday 13 November 2017 at the Clubrooms, 30 Hazel Avenue, Mt Roskill, commencing at 7.30pm.

The business of the meeting will include receiving reports from office holders and the election of officers for 2018. Setting of the 2018 subscription will also be discussed. More details of the meeting in next month’s Spectrum.


Amateur Radio Emergency Communication. Volunteers in radio communications.

Using our resources to help the community.

INFORMATION

The Auckland VHF Group has an AREC section that works closely with Auckland Council Emergency Management. They provide advice, resources and manpower to assist in times of

need.

The AREC section is headed by Section Leader Laurie Mathews ZL1ICU.

From time to time the VHF Group has training sessions and exercises. Members also assist with sports events, parades and other community activities. For further information about AREC

please see the NZART web site: http://www.nzart.org.nz/arec/

JOIN BRANCH 66 AREC

All members of the Auckland VHF Group are encouraged to join the AREC section. Your contribution, large or small is appreciated by all involved.

For further information about joining branch 66 AREC contact the Section Leader or his Deputy:

Section Leader; Laurie Mathews ZL1ICU 634 5130 0274 817 463 [email protected]

Deputy Section; George Raffles ZL1TUX 626 6944 021 735 361 [email protected]

*****

AUCKLAND VHF GROUP (INC)

SUPPORT THE EFFORTS OF THE VHF GROUP THROUGH YOUR SUBSCRIPTION

SUBSCRIPTIONS FOR 2017

THE SUBS GO TOWARDS;

Maintenance and on-going improvements to beacons, repeaters and linking systems for the national system, including the Klondyke repeater site.

Provides on-time and free access to spectrum magazine as soon as it is available.

Provides facilities for good speakers and lecturers at our general meetings.

Discounted access to our trading table goodies.

Access to test equipment and technical help when needed.

FULL MEMBERSHIP $45.00

ASSOCIATE MEMBERSHIP $40.00

FAMILY MEMBERSHIP ADDITIONAL $10:00

SEE ATTACHED MEMBERSHIP RENEWAL FORM (next page)

REMEMBER TO KEEP US INFORMED OF YOUR INTERNET ADDRESS!

OTHERWISE WE CANNOT SEND YOU SPECTRUM!



NAME Mr/Mrs/Miss/Ms Christian or given name Surname

Mr

Address

Phone: (home)

Phone: (work)

Phone (Cell)

Email

Occupation: Callsign

NZART Member Branch assigned

AREC Member Branch assigned

Category To pay

Membership Full $45:00 $

New/Renewal/Change Associate $40:00 $

Receipt # Family Add $10:00 $

Donations Auckland ATV $

Auckland/Klondyke $

Brynderwyn $

Data/D-Star $

IRLP $

Beacon/Repeater/Links/ATV Licences $

Other $

Total $

Payment

Circle one --> Cash Cheque Internet deposit

Invoice/Statement re-quired Please Advise Treasurer

Internet To account ASB 12-3020-0473626-00. Account name is: Auckland VHF Group Inc. Include your Name/Callsign for us to track. Note: this form needs to be returned to update records. FAX to 028 25544801 or Email

Post The Treasurer, Auckland VHF Group Inc., PO Box 10138, Dominion Road, Auckland 1446.

In Person Bring this form and payment to the next club meeting, 2nd Monday of the month or to the Committee meeting last Monday of the month.


The Auckland VHF Group Inc Branch 66 NZART gratefully acknowledges the sponsorship of Branch 66 Beacons, Repeaters and Fixed Links license fees and the Group’s repeater operations by the following

radio amateurs and NZART Branches for 2017

The Auckland VHF Group, Branch 66, would like to thank all those who came forward to sponsor the licence fee for our Beacons, Repeaters or Fixed Links for the year 2017 or donate towards the Group’s repeater Operations.

Repeater frequency Repeater Sponsorship Amount

and name location advised for 2017 paid

53.725 Repeater Klondyke Road ZL1AAR 50.00

144.253 Beacon Nihotupu ZL1IU 50.00

145.625 Data Rptr Klondyke Road NON-operational

145.650 Dstar repeater Klondyke Road ZL1ICU 50.00

146.625 Repeater Klondyke Road ZL1ICU 50.00

146.700 Repeater Ruaotuwhenua

146.900 Repeater Mt Puketutu Radio

432.253 Beacon Nihotupu Under repair

438.175 Dstar repeater Klondyke Road ZL1ICU 50.00

438.500 Repeater North Head

439.850 Link Tx to Kaimai Klondyke Road

439.875 Ak Nat Sys Rptr Klondyke Road

439.900 Link Tx to Egmont Klondyke Road

439.950 Link Tx to Brynderwyn Klondyke Road

1291.9 Repeater 217 Glenfield Rd ZL1ABS 50.00

Total Sponsorship $300.00

NZART Inc: Branch/Personal donations

Franklin Radio Club. Br: 10 $200.00

Papakura Radio Club. Br: 65 $500.00

Auckland Radio Club. Br: 02 $100.00

$

$

Donations $800.00

Current as at 03/09/2017


TRADING TABLE

Currently our Trading Table is only open on meeting nights. We will be at the Western Suburbs sale on Saturday 4 November, so come and have a look.

We have heaps of parts from dismantled commercial analog TV gear – trans-mitters, filters, circulators, patch panels, power supplies, cabinets. Too much to list individually, so come along to the clubrooms and have a look

And there’s more….

Two only coaxial transfer relays as per photo. N-Type connectors and 12V operation, removed from equipment but in excellent working condition. $50.00 each


23cm LOOP YAGI KIT FOR SALE

The last one! Model 2325LYK kit makes a high gain 23cm Loop Yagi. The price for this kit is $120.00. The kit consists of all the parts to make up a 25 element loop Yagi including the element mounting hardware and assembly in instructions. What is not supplied with the kit is the boom. This can be either a 25mm diameter aluminium tube, or a 25mm square section (square or “U” section).

When built up, the 23cm Loop Yagi has the following performance: Frequency Range: 1.25-1.30 GHz Number of Elements: 25 Boom Length: 1.83m (72”) Boom diameter: 25mm (round or square) Gain: 18 dBi -3dB Beamwidth (E plane): 30° F/B Ratio: > 20 dB Maximum power: 550 Watts

NEW – 4 Ohm Speaker

We have a good quantity of small 4 Ohm speakers completer with a black plastic bezel. The speakers are 50mm square and 33mm deep. Only $2.00 each.


Radio Frequency Transistors ATF55143 Low noise E-PHEMT 0.6dB noise figure. Low noise amp for frequencies between 450MHz and 6GHz. SMD package SOT343 (4 lead). [S.case] $1.00 each MGF1302 Low noise GaAs FET Nf = 1.4dB @ 4GHz, 4dB @ 12GHz. [S.case] $5.00 each

BF199 NS 25V 25mA, 500mW ft = 550MHz TO92[S.4.14] $1.00 for 10 BF494 NS 20V 30mA Low noise mix-osc/IF amp TO-92 [S.4.15] $1.50 for 10 BFR91 NS RF Amp. 5GHz 1.9dBnf @ 500MHz [S.case] $2.00 each BFY90 NS 30V 50mA 2.5dBnf @ 200MHz TO72 VHF/UHF [S.case] $1.50 each MFE121 Dual gate N-MOSFET 20V 5mA VHF Amp BF352 equiv. [S.case] $0.50 MPS5179 NS TO92 12V 50mA 200mW fT 2000MHz Nf 5.0dB [S.5.13] $0.50 each

RF Transistor. Use in UHF/VHF amplifiers with collector currents in the 100 uA to 30 mA range, and in low frequency drift, high output UHF oscillators.

BFG67 NS 8GHz 50mA rf amp/preamp SOT143B package [S.case] $1.50 each MPS5172 NS 25V 100mA Ft 120MHz [S.7.5] $0.10 each MPS6507 NS, VHF Mixer, 20V, 100mA, Ft 700MHz [S.5.8] $0.20 each C1-12 NS RF Pwr 400 – 500 MHz 1W 12.5V [S.Case] $1.00 each C3-12 NS RF Pwr 400 – 500 MHz 4W 12.5V [S.Case] $2.00 each MRF237 NS RF Pwr. VHF 4.0W 12V TO39 [S.5.13] $3.00 each MRF449 NS RF Pwr. 2-30MHz 30W 12.5V stud mount [S.Case] $10.00 each MRF559 NS RF Pwr. 806-960MHz 0.5W 12.5V [S.5.13] $0.50 each MRF628 NS RF Pwr 400 – 500 MHz 1W 12.5V [S.Case] $2.00 each MRF904 NS RF Small signal amp. Ft 4GHz 15V TO206 [S.5.13] $3.00 each SD1144 NS RF Pwr 400–550 MHz 2W 12.5V stud mount [S.Case] $3.00 each 2N5945 NS RF Pwr 400–700 MHz 2W 12.5V stud mount. [S.Case] $3.00 each 2N5946 NS RF Pwr 400–550 MHz 10W 12.5V stud mount [S.Case] $4.00 each 2SC908 NS TO39 RF Amp 1W @ 500MHz 13.6V [S.5.13] $1.00 each

Designed as driver and RF power amplifier. 0.5 to 0.8W output at UHF land mobile band. Gain 15dB (Vce=6.0V, Ic=5mA, ft=2000MHz)

3SK45 Packaged as ECG221, dual-gate N-channel MOSFET for vhf amp and mixer applications. [S.6.16] $0.75 each

3SK73GR Dual-Gate MOSFET N-channel 30V 7mA [S.6.7] $1.50 each 3SK74L Dual-Gate MOSFET N-Channel 20V 25mA(max) [S.case] $1.00 each 3SK192GR Dual-Gate MOSFET 15V 30mA(max) [S.7.13] $1.00 each 2SC5488 NS 30V 70mA low noise rf pre-amp [S.6.4] $0.10 each 40673 Dual-gate N-Mosfet – See MFE121 [S.case] $0.50 each

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