50 MHz & Up Group

Group Logo


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. Learn more . . .


For questions about this group or about programs and activities, please contact the 2018 President, Steve Shyvers (N6KLD):  steve.shyvers (at) gmail [dot] com

2018 dues and member information must be updated

If you do not have any changes at all in your contact information, then simply send an email with a sentance to Jeffrey Pawlan satating that nothing has changed. Please use jpawlan@yahoo.com
To send a memberform with your updated information or to join, please go to the Membership tab of this website.
Dues are $10 for a year, $15 for two years. This can be brought to a meeting or sent to the new Treasurer:
Oliver Barrett
1111 Pecos Way
Sunnyvale CA 94089

Make your check payable to 50MHz and Up Group of N. Calif Inc

May 2018 Meeting Announcement

Our meeting location has changed

We no longer have access to the TI meeting facilities for our 50MHz and Up Group.

Our next meeting of the 50MHz and Up Group of N. Calif will be on Wednesday, June 13 beginning at 7:00pm. This is a different day of the week because of room scheduling. Note that this meeting will be in a community room of the Sports Basement located at 1177 Kern Ave, Sunnyvale. This is off of Lawrence and approximately across from St Johns. The meeting which will begin at 7pm and we must exit the building at 9pm.

Minutes of the May 2018 meeting

Steve Shyvers (N6KLD) called the meeting to order at 7pm.
The meeting started with announcements.


MUD 2018 will be in Dayton, Ohio, October 11-14. For more information see http://www.microwaveupdate.org/
The East Bay Amateur Radio Club is looking for speakers. If interested, contact Martin Rothfield, W6MRR. The clubs web site is at www.ebarc.org
The GNU Radio Conference will be September 17-21 in Henderson, Nevada. For more information see https://www.gnuradio.org/grcon-2018/
Central States VHF Conference will be in Wichita, KS July 26-29, 2018. A call for papers and presentations has been issued, with a deadline of May, 15th. For more information visit https://www.2018.CSVHFS.org

This was followed by a discussion of the July Picnic and Tune-up day
The location will be at the Ed Levin park, Sandy Wool Picnic area behind Milpitas. The date will be either July 21 or 28, determined by a pole on the email reflector. Art Lange moved that the club pay for the lunch, (probably Armadillo Willies barbeque). The motion was seconded, and passed by a show of hands.
Picnic Action Items, and Decisions
a) Steve will send email to group asking whether July 21st or 28th is better preferable to members.
b) We will not reserve a spot. We will depend on arriving early and staking a claim on several picnic tables near field.
c) Mike has test range equipment. Volunteers will be needed to help him test it prior to the picnic.
d) Club will cover cost of food and drinks. Recommended food is Armadillo Willy's. Need volunteer(s) to order and fetch food for 20 people.
There was discussion about adding 5 GHz to the tune-up equipment. No decision on this.

Oliver Barrett presented his finding regarding the AD6FP beacon performance.



Tom Babut (SP5XMU) gave a presentation on VHF and Microwave in Poland and Europe.

The presentation was followed by a round table discussion of plans for the SBMS 2 GHz and Up contest.

The meeting adjourned at 8:55 PM

The 2018 Officers and Board Members

Here is the presentation by Jeffrey Pawlan, WA6KBL on the history of circular waveguide, the use of low loss circular waveguide, transitions to rectangular waveguide, and expremely high performance dual mode feedhorns for 10GHz and 24GHz with builtin adapters to standard rectangular waveguide.

Please click here to view or download.Circular waveguide and horn antenna talk. This is a Powerpoint.


Microwave Beacons in operation The following beacons are known to be operating as of 04-16-2016:

Mt Vaca CM88wj 38.415, -122.116 10368.325 W6ASL +30dBm 10dBi omni CW ID
Mt Allison CM97bl 37.500, -121.872 10369.192

+30dBm total out

10dBi omni

12dBi omni
open WG
CW ID, drifts ~10 kHz
Linear translator: Output is 11-55 kHz above beacon
Input 600 kHz below desired output
FM ID, aimed to Los Gatos
Mt Leeson CM97ae 37.167, -121.924 10367.990
KF6KVG +20dBm
2.5" horn
1.5" horn
1.25" horn
0.6" horn
FM ID, locked, aimed NW
FM ID, locked, aimed NW
FM ID, unlocked, aimed NW
no ID, locked, aimed NW
Bear Mtn. DM06ir 37.747, -119.281 24191.990 W6BY/B +27dBm 20 slot omni locked, IDs as DM07IC, will fix
Mt Frazier DM04ms 34.775, -118.969 10368.310 N6CA/B +31dBm 14dBi omni CW ID, locked
Heaps Peak DM14kf 34.235, -117.141 10368.370 ? +?? dBm ??dBi omni CW ID
Palos Verdes DM03ts 33.747, -118.336 10368.300 N6CA/B +32dBm 14dBi omni CW ID, locked
Santiago DM13fr 33.712, -117.534 10368.330 KE6JUV +27dBm 10dBi omni CW ID, locked
San Miguel DM12mq 32.697, -116.935 5760.000
+34dBm EIRP
10dBi omni
12dBi omni
CW ID, locked
CW ID, locked, aimed to LA