50 MHz & Up Group

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The 50 MHz and Up Group is an educational and public service amateur radio organization centered in the San Francisco Bay area. The group is interested in developing and utilizing communications on frequencies from 50MHz up through light-waves. The group is open to any related topics that might be of interest to members, such as: technology, design, construction, operation, public service, contesting and antennas. Lean more . . .


For questions about this group or about programs and activities, please contact the new President, Jim Moss, N9JIM:  n9jim-6 (at) pacbell [dot] net


Renewal and annual dues payment of $10 were be due on Feb 1

For those who live within the Bay area, the annual dues for 2014 are $10 per year. This must be sent via mail to the new Treasurer, Jerome Peters AF6UX or bring to the meeting and hand it to him. Make the check payable to: 50MHz and Up Group of N. Calif. If you are a member, then you can find his address in the Members Only section. Or you can look up his address on QRZ or Buckmaster.

Those living outside of the Bay area do not pay dues and as Friends, do not vote. Regardless of whether you are a full Member or you are a Friend, we are required to have a current database.

If none of your information has changed since last Feb, then please send Jeffrey Pawlan WA6KBL an email simply stating "nothing changed". If your phone or email or street address has changed, then you will need to fill out a complete new memberform. See the Membership link for instructions.

Meeting Announcement

Our next meeting of the 50MHz and Up Group of N. Calif will be a regular meeting on Thursday Apr. 3, 2014 at 7pm. It will be at the usual TI conference auditorium. You get there from Kifer Rd as shown on our meetings page (click on meetings in the selection bar)

The talk will be announced and sent by email to the membership on the reflector list.
One subject to be discussed will be the upcoming Maker Faire in Santa Clara in April. The microwave community from S. Calif will be coming and we should participate as well.
All of our meetings are free and open to the public. Students and IEEE members are especially encouraged to attend.

The Group project has begun. Here are the first set of slides and the next steps

Jim Moss and Mike Lavelle have put together a streamlined process to assist you in getting a working transceiver on either or both of these bands. Here are the slides that were presented by Mike at the March meeting:
(The Road to 10 and 24 GHz.pdf) Please click here to view or download

The Group project continues and here are the slides from the May 2013 meeting

This presentation includes:
- reports on the PCOM module testing and brick tuning workshops held in April
- plans for antenna feed workshops (to be held soon)
- some notes on T/R sequencing requirements

Please click here to view or download

The 2014 Elected Officers

Mar. 2014 Meeting Minutes by Steve Shyvers

Present: 18
Start time: 7:05 PM
General business, announcements, etc.:
1. Jeffrey brought in a few items surplus to his needs, and he suggested that if anyone wanted any of them that a token donation to the club be made. This netted five dollars for the club coffers, and Jim received the money.
2. Annual dues were paid by some members. Jim received the money and recorded the members' names.
3. The SBMS 2 GHz and up contest will be May 3 and 4, 2014. SBMS has proposed some rule changes related to contestants (individual vs. club) and bonus points for operation above 10 GHz, but these are not finalized. Most rules would remain the same as before.
4. 24 GHz activity day on 3/15/14 at 10:30 AM in Jim's garage.
5. De Anza flea market is Saturday, March 8, 2014. First one of the year.
6. 10 GHz activity day 10 AM to 12 Noon. Who and where:
N6NU, Andreas, Canada College (CM87UK)
K6ML, Mike, Canada College (CM87UK)
N6JV, Norm, Sacramento (CM98HL)
W6DXJ, Pete, Sierra foothills 30 miles east of Sacramento (CM98lr)
7. Joel's 10 GHz contest score now listed in ARRL on-line article after ARRL acknowledged errors and made corrections.
8. Onizuka dish - Jeffrey stated that there is probably no decision yet from the Sunnyvale city council.
9. Various project statuses from members:
10. Art gave a presentation entitled "GNSS Update 2014" about current GPS technology world-wide and about the challenges to achieving centimeter-scale GPS positioning accuracy.
11. Meeting adjourned at 8:57 PM.

New! Documentation for Harris 10GHz surplus equipment

Mike Lavelle, K6ML and Oliver Barrett, KB6BA have provided us with much of the documentation for the surplus Harris DVM10 Digital Versitility Microwave radio links. Please log into the Members Only page to obtain two PDF files.

Improvement of the Stellex/Endwave YIG Synthesizer

by Jeffrey Pawlan, WA6KBL

The Stellex/Endwave mini-YIGs along with their phase locked synthesizer board are able to provide you with a stable and relatively low noise X-band signal source. However, they designed it incorrectly and most of the output power of the YIG is needlessly lost.

I have redesigned the sampling circuits so that you will now obtain +12dBm to +13.5dBm output power. It is an easy and inexpensive modification.

Because John Miles, KE5FX did the original work on using these surplus items and there are many links to his webpage, I have put my article along with nine photographs and figures on his webpage. Please click here to go to this page and then scroll down to nearly the bottom of that webpage.

Current Updated Rosters Available to Members

Members may obtain the roasters in several sort orders by logging into the Members Only webpage. These have not been updated because we did not receive updated memberforms or emails stating that your information has not changed. Also we need the dues from local members.

The presentation by Goran AD6IW on high efficiency amplifiers.

He gave at the 2010 EME conference and also at the 50MHz and Up meeting in Sept. Click here to download it

Report on the Ham Radio Social at the International Microwave Symposium on May 25, 2010 in Anaheim

The report and all photos are now located on a separate page. Please click here to view

Two presentations by Brian Yee W6BY are available for download

A slide presentation on an Introduction to Amateur Radio Microwave Operation is available as a PDF. Click here to download it
The second presentation is located on the Events tab page.


Microwave Beacons in operation UPDATED The following beacons are known to be operating as of 06-29-2011:

Leeson Site, near Mt Thayer, KF6KVG: 10367.990MHz, 24191.975MHz, 47087.99, 79920MHz, 37deg 10.034min N, 121deg 55.500min W
Mt Allison, AD6FP power unknown 10369.192MHz, 37deg 29.905min N, 121deg 52.206min W
Mt Allison, AD6FP power unknown 24192.01MHz, 37deg 29.905min N, 121deg 52.206min W
Mt Allison, WA6QDP power unknown 47061.017MHz, 37deg 29.905min N, 121deg 52.206min W
Mt Vaca, W6ASL: 10368.325MHz, 38deg 24min 51sec N, 122deg 06min 50sec W
The Mt St Helena beacon has been removed
Mt Frazier, N6CA/B DM04MS 1.3w output 8013ft 10368.3101MHz, 34deg 46min 30sec N, 118deg 58min 09sec W
Palos Verdes, N6CA/B DM03TS 1.6w output 1300ft 10368.300MHz, 33deg 46min 15sec N, 118deg 22min 30sec W.
Santiago Peak, KE6JUV DM13FR unknown pwr 5664ft 10368.330MHz, 33deg 42.690min N, 117deg 32.020min W.
Heaps Peak, call? DM14KF unknown pwr 8000ft 2304.11MHz (drifts 40KHz from 2304.08 to 2304.12) 34deg 14min 2.4sec N, 117deg 8min 25.2sec W
San Diego, K6QPV/B DM12MQ 2565ft, +34dBm EIRP horizontally polarized horn toward the LA basin 24.192040GHz +/- 500 Hz, 32deg 41.8min N, 116deg 56.09min W.
San Diego, N6IZW/B DM12MQ 2565ft, omni +39dBm EIRP 10.368360GHz GPS locked, 32deg 41.8min N, 116deg 56.09min W.
San Diego, K6QPV/B DM12MQ 2565ft, omni +44dBm EIRP 5.760000 GHz GPS Locked, 32deg 41.8min N, 116deg 56.09min W.
San Diego, K6QPV/B DM12MQ 2565ft, 16w into a yagi 1296.3000 GHz, 32deg 41.8min N, 116deg 56.09min W.