> Nate Duehr <[EMAIL PROTECTED]> wrote:
>
> skipp025 wrote:
> > Re: Hamtronics 224MHz Repeater Kits
>
> [snipped huge re-engineering effort to make a Hamtronics
> 222 MHz repeater work properly...]
>
> Skipp,
> Basically it sounds like you had to re-engineer the thing
> to MASTR II or MICOR radio engineering specs.
Not the same animal really, while both are being used for
similar tasks. Just like the first Master II or Micor Conversions...
someone had to figure out what all the issues were and follow
up with a working fix.
In the 70's and 80's, I didn't have the money for a
commercial radio, but I had lots of time. I learned a
heck of a lot more trying to sort out the problems and
figure up a fix. No one I know of is teaching two-way
radio anymore... Like Heathkit was, you could better
understand how things worked if you built them from the
ground up.
> Simpler to convert one of the others, isn't it?
Simpler wasn't cheaper... but I understand where you're
thinking it is the more practial path.
> ;-)
> What you had to do, sounds like an utter PITA...
Well... flash back to the 70's while disco was on the
broadcast radio.
In the previous 224 repeater exammple, I learned a lot
about rf pick up in high rf areas, receiver protection
and various fixes, a lot about the Motorola MC3357 and
MC3359 FM Radio Chips, an in debth look at how squelch
action works and can be modified in those circuits, how
many police scanners and other common vhf radios have
the 3357/3359 chips in circuit, how to build a proper
rf tight chassis, how to build and align a serious rf pa
from square one, how power supply impedance can cause
music pickup & playback through a repeater.... yadda,
yadda things I would probably not have run into using
a semi expensive (my budget at the time) surplus
commercial radio.
Motracs were around, but they didn't interest me much...
> Nate WY0X
Nothing better than servicing your repeater while "Funky Town"
and "Boogie Shoes" was playing on the shop fm broadcast radio.
cheers Nate,
skipp
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