And if anyone wants more of the ESP1000 units, I have 5 available *CHEAP*, but
you gotta come & get em in auburn, ca. I figured at the very least, they have a
nice switching supply, and a bunch of RF goodies in the rx & tx, like the
brick/hybrid RF modules, etc. Appears to be the same RF stuff a
You are on the right track. 20 watts is not
really enough power. Most of the 220 acsb
systems I saw were poorly applied and built
from plans made by people who appear to have
never been "in the field".
When you get into a new technology, there is
always strange issues to be dealt with. I
Here is the preliminary schematic. Because the synth chip in the
radio uses +9 V for some reason, this will have to be a board with SMD
parts on it instead of a single chip.
The plan is for Channel 1 to start at 223.85 with 10kHz spacing and
channel 201 starts at 222.15 MHz. There will be jumper
What is the difference in the formats? Pilot tone?
It looks like the SEA repeater is based on two mobile radios, so the
chip I am working on should be compatible with most of their
equipment, as long as it uses the MC145158 synthesizer.
I saw a repeater on there with a dutch auction, but I belie
Pay attention to what you buy. The 220 stuff is
found under SEA, Intek, Securico, Midland and LMR
"Linear Modulation" brand names. Again there
are two ACSB formats in use and they do not
talk to each other.
I know of a group of "people" running around with
surplus ACSB units on simplex/tal
Anyone have an extra one of these repeaters they are willing to
sacrafice for experimentation purposes?
Seeing as 4K00J3E is an aceptable emission in the ham bands it has
been decided to leave the modulation type the same (ACSSB). This
would allow use of the surplus HT and mobile radios currently
The conversion to FM or a change to the Amateur Range
is not practical. They are ACSB repeaters and there
are 2 types... depending on who's format you have.
Using ACSB is anoter story... It works just killer
with a 20 watt radio going many times the distance
a similar power FM signal.
The r
7 matches
Mail list logo
