50 MHz and amp; 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 2022 President, Jim Moss (N9JIM):and nbsp; n9jim at pacbell.net

The next regular meeting will be Sept 5 at 7pm. Please note the new time and the new location.

This will be a hybrid meeting, both in person and you can view or participate via zoom.

This is the new location:
855 Maude Ave
Mountain View, CA

click here for the google map to HackerDojo
or you can Join the Zoom Meeting

Meeting ID: 869 7272 5373
Passcode: 10368
One tap mobile
+16699009128,,86972725373#,,,,*10368# US (San Jose)


Events (Jim)
10GHz and Up Contest
Mt Allison 10GHz translator net 3rd Sunday of the month @ 4PM - Oliver
Electronics Flea Market Sunday Sept 10 (6AM-12PM) at West Valley College
Help selling club inventory always welcome! contact Jim


Treasurer Report (Oliver)

Web and Email Hosting and Tools (Jim and Committee)
Jeffrey is working on transition for the 50mhzandup.org site. MicrowaveUpdate is also using their hosting and tools. https://www.microwaveupdate.org/ content is under construction by the next MUD committee.

Other old business


Awards committee - Goran/Jim
Group Projects Wiki? - Brian Kline
Group parts/component public spreadsheet? - Jim


Planning session for 10GHz and Up Contest.
Mel wa6jbd@verizon.net coordinating overall list at SBMS, send info to him or Jim n9jim@pacbell.net will forward to him Jim will forward list to 50Up.
format: Call Name Location/Bands/Notes

Round Table Discussion

Minutes of the Aug 1 meeting

The meeting was held in person at HackerDojo, 855 Maude Ave, Mountain View, and on the Internet via Zoom.
Jim Moss (N9JIM) called the meeting to order at 7:10 PM.
The Mt Allison 10 GHz translator is back on the air. The Mt Allison 10 GHz translator net is held on the third Sunday of the month (August 20th), at 4 PM.
The upcoming Contest Calendar
ARRL 222 MHz and Up Contest, August 6-7, 11 AM Saturday to 11 AM Sunday.
ARRL 10 GHz and Up Contest, August 19-20, 6 AM Saturday to midnight Sunday.
For more information see contests.arrl.org/10g/
ARRL September VHF Contest, September 9-10, 11 AM Saturday to 8 PM Sunday
ARRL 10 GHz and Up Contest, September 16-17, 6 AM Saturday to midnight Sunday.
Other new business
The Awards Committee, consisting of Goran Popovic (AA6IW) and Jim Moss, discussed possible future awards.
Group Projects Wiki Project
At the July board meeting Brian Kline volunteered to start a Wiki on GroupsIO to act as the focal point for sharing information about group projects, with links to other related information sources on the web.
Existing projects to consider for inclusion are:
Wavelan 24 GHz Transverter project.
K6MG Modular Beacon/Transverter project
3744 MHz IF Transverter project.
Another project proposed was a list of hard to get components available from the club, or from members. The idea centered on maintaining the list using a web based spread sheet.

The formal part of the meeting concluded at 8:30 PM.

The 2023 Officers and Board Members

Wavelab23 modules converted to 24 GHz ham band transverters

Here are the slides from Jim McMasters' (KM5PO, pres of NTMS) invited presentation. The talk covers conversion of the popular Wavelab23 modules to 24 GHz ham band transverters.
Please click here to view or download the slides

Paul Zander's Presentation on Signal to Noise Ratio of wideband FM

Here you can download and read the presentation by Paul Zander (AA6PZ) on the signal strength and signal quality from the microwave beacons, and the FM threshold effect. Please click here to view or download the slides Also download this document containing explanations: Please click here to view or download the Word document

Beacons in Northern and Central Calif

The SBMS and the San Diego Microwave Group are the best resources for Southern Calif.

Here is our document about the upgrade and operation of the Mt Allison Beacon
Please click here to view or download

Microwave Beacons in operation The following beacons are known to be operating as of 01-29-2023:
Stanford University CM87WJ 37.403, -122.165 122.400G K6ML +2 dBM ERP 70 degree horn aimed E CW ID, locked
Mt Allison CM97bl 37.500, -121.872 80.832G, 40KHz low AD6IW unknown aimed Alviso CW ID, locked
Mt Vaca CM88wj 38.415, -122.116 10368.325M W6ASL +30dBm 10dBi omni CW ID
Mt Allison CM97bl 37.500, -121.872 working

not measured

10dBi omni
12dBi omni
+20 dBi horn 27 deg beamwidth, aimed SW
CW ID, locked, S-meter output
Linear translator: Output is 1KHz-40kHz above beacon
Input 600 kHz below desired output
CW ID locked
CW ID locked
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 being rebuilt 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