¿ªÔÆÌåÓý

ctrl + shift + ? for shortcuts
© 2025 Groups.io

QRP power measurement and AA7FO lab and web report[long]


 

QRP Power:
See <> manual for
how it is done with a dummy load.? Unfortunately QRPGuys are
shut down for a month due to traveling on vacation.
The power formula on the PCB is very very easy to derive
and easy to compute on your phone calculator.? $20 is
pretty cheap for thing IMHO.? I'd like them to change
the pin out to allow a two pin Arduino cable to be
used with the center pin on the board going to ground.
Makes it easier for me, and I like easy.

AA7FO Web Page:
Because of the security notice threat that was coming
up on my old web page, I have moved it.
<>

Note that I have revived some of my legacy writings
on Manhattan construction, 1W and 5W building guides
for those of you still hoarding the unbuilt kits
in secret storage locations.? The money I save I'll
donate to qsl.net to keep them going.? Not a friend
of money for nothing and chicks for free, as the
song goes.? I'm trying to get time to get back to
writing, but its more fun to build and operate.
I'll let you know how my combo of 10.000MHz(VXO) and
4.032MHz(IF) work out.? I'll measure the MDS with the
old S1-S9 generator from NorCal and report back first
thing.? You still have yours?? Battery check.

AA7FO YouTube Status:
Lost use of my video camera after 20 years of faithful
service, so if you are a vlogger, let me know offline
(I'm sure this group isn't interested in how to do it)
what a good deal is.?? Too many options on amazon.com.
Want one with macro capability for the closeups of
boards etc.

Manhattan Build:
Awaiting QRPMe pads to get the SST build going.
FYI.? If you look at the crystals needed, some
are very hard to find.? But, look at the 1W
frequencies in the retired kits on kitsandparts.com
for easy frequency combos to find on ebay and aliexpress
for less than a quarter a piece in quantities
of 10 with free shipping.? Search the isles for
what you need.? 40m is the tough combo.

Experimental Venture:
Someone in this group can open source a technique
for using the cheap Si5351 module to replace the
VXO and allow us to use any on hand crystals
for the IF we want with the usual caveats on
birdies.? May already be available from unknown
source previously written up.

FYI

dit dit

--
chuck adams, aa7fo
QRP WAS 17m started Apr 2, 2025
WAS-17 QRP --> TX,FL,SC,GA,OK,AR,KS,AL,AZ,MN
PA,CA,CO,WI,NE,ID,IL,NC,NY,WV
MA,OH,OR,RI,MT,WY,WA,MI
DXCC W,VE,JA,PY,ZL,TX9

Join [email protected] to automatically receive all group messages.