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Interstation interference book
Joy was asking about how to use a bandpass filter to limit interference at the Baylands. I don't recommend that you buy the filter. It is difficult to build analog filters good enough to limit interference. There are some good commercial filters that have been used during field events (InRad triplexer). Check out the filters that are used at Pacificon. I found this interesting book that might help. see attached. Dave W6VYC |
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Re: Friday
I also plan to be at the Baylands for lunch and ops. I am staying for the PAARA meeting (USS Hornet Radio Station) and dinner at the Green Elephant. ? Dave W6VYC
On Wednesday, October 2, 2024 at 07:26:02 AM PDT, Hiroki Kato <hiroki@...> wrote:
I will be at the Baylands starting with lunch. Hope to see many of you. Hiroki AH6CY |
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Re: How was the Fars home brew night
The guy who chases weather balloon?transmitters got?first place for?hacking a toaster oven, by feeding a digital bitstream into the controller from an external LED controller. He made it beep in morse code. Hiroki got second place for using stepper motors, connected in parallel, for controlling loop antenna tuning, from a distance away.?I think third place went to the gal who gave us a talk on mesh networking, for making a Meshtastic?router, solar powered, with batteries mounted internally. Fourth place went to a guy who made a pocket HF rig for POTA?activations. David Varn made a power supply for ARC transmitter/receiver pairs.? The parachute jumping guy made an Ammo Box boom-box, Bluetooth driven. One guy made some cool antenna mach boxes. One guy made electrostatic headphones, with a driver box containing a 300 volt power supply and?+/- 150 volt driving signals. There was a 24 GHz transceiver. Stiv plugged his ham connection online portal. The Stanford Singles Club leader made a PVC/whip based vertical antenna. There were two other loop antennas, one which will be computer tuned, eventually. Another guy talked about a slot antenna made with copper foil wrapped like a barber pole around a PVC pipe, but it didn't work. So he proposed a double inverted V, but he got shut down for talking too long.? Hiroki also showed his handheld TruSDR VHF handie talkie. I'm sure there were more projects. On Sat, Sep 28, 2024 at 10:13?PM Doug Hendricks via <ki6ds1=[email protected]> wrote:
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Re: How was the Fars home brew night
It was great. I missed the buffet. But there were lots of cool projects. There may have been 60 attendees. On Sat, Sep 28, 2024 at 5:39?PM Doug Hendricks via <ki6ds1=[email protected]> wrote:
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Re: Power Supply
Elecraft is selling this PS. Preferring to produce more high performance radios, Elecraft has chosen to market the Power Werx SS30 DV 25 Amp power supply.? A compact, switch-mode power supply, the SS30DV is intended for use with both the K-Line, KX-Line and Classic Line of products.? I bought one and I?use it with ICOM 7100, KX2, KX3. It is small and light PS perfect for portable operation.? I had Alinco, and still have Samlex, Astron and Icom power supplies. They are all good but much heavier.? 73 Ned AC6YY On Fri, Sep 27, 2024 at 2:07?PM Connie W6EFI via <stillinger=[email protected]> wrote:
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Re: Friday
I will see y'all at ops, then do a bike tour, and then try to crash the FARS homebrew night with a prezo on my ARC-5 (WWII surplus) project. I say "try" as I have received no replies from FARS re. my eligibility. Others have suggested simply showing up with the goodies, which is what I will do.?
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Best, --David KM6RI |
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Re: Power Supply
Hi Len!
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Both of my Astron RS-35Ms gave up the ghost years ago, one from old age, the other from "controlled flight into terrain." I now use several Powerwerx SS30DVs, one in Chester to power the K3 station, one at home to power the K2/100.? No RF noise that I've detected, and I've only heard the internal fan come on during long RTTY transmissions a couple of times--never during CW or SSB. At home I also use the "new" Astron 50 amp switcher--same story, but it is a bit bigger and a lot more money.? The voltage has more adjustment.? I have it cranked to 14.5v. The Powerwerx without a meter has two PP connections in front, and banana plug/binding posts in the rear.? A lot of bang for the buck. 73, Eric NF6S ex WD6DBM ?
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David W Crocker
Jeff Reagan
David
Len johnson K6LRF