[Skimmertalk] Difference of RP10 14 16

[Dai NAGAKURA]

Thank you Bob 

Well RP-10 shall handle 8 bands,
but I could not find nor understand new OS and commands.
Would you tell where hidden gem and spell is ?

>A preamp could make the problem worse.

This is delicate issue.
At this point , We are expecting furtheｒ study.

Thank you 
Dai JF2IWL





On Mon, 15 Jul 2019 20:46:33 -0700
"Bob Wilson, N6TV" <n6tv at arrl.net> wrote:

> On Mon, Jul 15, 2019 at 8:09 PM Dai NAGAKURA <ndai at cameo.plala.or.jp> wrote:
> 
> > I have tested RP-10 and 14 , five weekdays and IARU HF 24 hours.
> >
> 
> Thank you.
> 
> 
> > To write a brief paper, I would like to know two point below.
> >
> > (1) RP-10 could run only 6 bands at the same time
> > RP-14=8 bands , RP-16=8x2=16 bands . is it right ?
> >
> 
> I'm not sure about the RP-10, I thought it was also 8 bands.  RP-14 is
> definitely 8 bands, and RP-16 = 8x2 = 16, correct.
> 
> 
> > (2) RP-10 and RP-14 need step down transformer and pre-amp Instead, RP-16
> > need NOT Both.
> >
> 
> Yes, RP-10 and RP-14 both need to have 14:1 impedance transformers (and
> shunt jumpers moved on both inputs), and they need about a 10 dB preamp.
> 
> I am not sure if the RP-16 needs a preamp.  Maybe only on one antenna
> input, just for the high bands.  But it is easily overloaded (intermod) by
> nearby FM broadcast stations between 88 and 108 Mhz, and needs a lowpass
> filter.  A preamp could make the problem worse.
> 
> 73,
> Bob, N6TV

-- 
Dai NAGAKURA <ndai at cameo.plala.or.jp>