N0ZGO on the interwebs
Random information which might help other amateurs
QRP Homebrew (qrp.pops.net) PDF Mirror
As of 5-Oct-2014, a great QRP resource on the Web has gone dark; VE7BPO has
taken down qrp.pops.net for many reasons. I'd like to thank him for all of
his work over the years. He has shared success and failure equally over
that time, and it reminds me that we only learn through failure and
VE7BPO has allowed me to host the complete PDF of his site as a
link on mine. Enjoy!
AMD Am79C411 CT2 PhoX / VTech / Sony Cordless Resources
Dissasembly of my 90s-era VTech cordless phone revealed a bunch of
interesting ICs and the possibility of hacking this into something
for use on 33cm.
- Wayback Machine archives pages for this platform, indicating it has an 8051 controller
- Datasheet for the AM79C411 (handset) -- missing Chapter 4
- FCC filings with complete schematics
- GBPPR Issue #90 includes a project based on this platform
Alinco DJ-580T CMOS Battery Replacement
After serving faithfully for 19 years, my DJ-580T HT started losing
its mind. After being switched off for a while, all memory channels
would be empty and the HT would power up with the default
Fortunately, replacing the battery was easy. The part
needed for this fix can be obtained from Digi-Key:
- Digi-Key P/N: P280-ND
- Mfg P/N: BR-1225A/FAN
- Description: "BATT LITH COIN 3V HITEM SMD"
ICOM IC-746PRO ACC1 Socket
While wiring up a digital interface (PSK31/RTTY/etc) for my
base-station rig, I encountered an interesting conundrum.
The 8-pin DIN connectors I had on hand wouldn't fit, no matter how
much persuasion I used. As this is a rather expensive rig, I stopped
short of using the hammer. hihi
It turns out that there are two variants of the 8-pin DIN
connector. The ones I had on hand were DIN41524 type 262°,
whereas the rig needed the more common DIN45326 type 270°.
Credit for the DIN type numbers goes to this site.
- Store: Fry's Electronics
- Manufacturer: Pan Pacific
- Mfg P/N: DIN-46000-8P-P
Amateur Radio Resources
- GBPPR has an impressive collection of information.
- JF1OZL has copious homebrew designs, but his website seems to have gone dark. (archive.org link)
- Field strength meter ideas from KA7OEI
I built the lightning detector from techlib.
You can view a run with the storm about 30 miles away. I'm using the fixed 150k sensitivity option right now.
Copyright (C) by Zach Metzinger. Reproduction without permission is prohibited.
I can be reached at (mycallsign) (at) pobox (dot) com