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

March 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 Thursday, Mar. 1 beginning at 7:00pm. Note that this meeting will be in back private room of the IHOP restaurant located in the Avatar Hotel at 4200 Great America Parkway, Santa Clara. In order to obtain the use of this room, we should all come early and order food. We will begin the dinner at 5:30pm but you can come anytime before the meeting which will begin a 7pm.

The main business will be an open discussion about possible meeting places. Several people had suggestions in the Feb meeting and they were going to obtain more information to present at this meeting.

Minutes of the February 2018 meeting

Steve Shyvers (N6KLD) called the meeting to order at 7:05 PM.
The meeting started with introductions, since there were a number of new attendees and guests.
This was followed by a presentation by Hannes Illipe, SM6PGP. Hannes talked about the 5.7 GHz GaN power amplifier that he has designed and built. Hannes was visiting from Sweden.

The presentation was followed by a long discussion about possible long term meeting locations to replace the TI conference Center where we had been meeting.

A number of locations were suggested as possibilities to investigate. Some locations will require liability insurance, and some will require a change of the meeting date. Various individuals volunteered to investigate specific locations and issues and report back to Steve Shyvers. Steve Shyvers took on the task of reserving the meeting room at IHOP for the March meeting.

Jeffrey Pawlan made a motion that we approve the expenditure of $750 for a computer projector, for use a meetings. The motion was seconded by Larry Zuckerman and carried with one apposing vote. Oliver Barrett volunteered to investigate suitable projectors along the line of the Epson X51.

The next item of business was what to do with the equipment donated to the group by the TI Amateur Radio Club. After some discussion Joel Wilhite, and Larry Zuckerman were tasked with coming up with a plan to auction off the equipment.
That ended the formal meeting.

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