Hello!
If You look at the characteristics of HF common radios You will see the huge
difference between the preformance on 28MHz and 14MHz for most commercial
equipment and -hence-there is no technical reason for that!.
TS870 and 756pro are pure examples :)
Table 4: IP3 values of different HF RIG's on 14 MHz and 28 MHz in AIP ON
state (preamplifier off) as taken from G3SJX data (50 kHz tone spacing).
HF RIG
IP3 [dBm] @ 14 MHz
IP3 [dBm] @ 28 MHz
FT-1000MP
24
6
FT-1000MP MARK-V
24
2
TS-870
17
20
TS-850
25
16
IC-775DSP
12
1
IC-756PRO
13
14
IC-738/736
21
22
That is the reason!
S55M-Adi
----- Original Message -----
From: "Bill Coleman" <[EMAIL PROTECTED]>
To: "S55M" <[EMAIL PROTECTED]>
Cc: "Elecraft" <[email protected]>
Sent: Tuesday, March 22, 2005 9:44 PM
Subject: Re: [Elecraft] 14361!
>
> On Mar 21, 2005, at 6:03 PM, S55M wrote:
> >
> > While surfing arround on Elecraft list archives i read abt 14361
> > birdie.
> > The common statment is "Thanks God is out of band"
> > Not if You are using 144/14MHz transverter :(
>
> Why use 14 MHz as an IF? Seems like 28 MHz is a better choice -- and
> you get 2 MHz of coverage instead of nominally 350-500 kHz.
>
> Bill Coleman, AA4LR, PP-ASEL Mail: [EMAIL PROTECTED]
> Quote: "Not within a thousand years will man ever fly!"
> -- Wilbur Wright, 1901
>
_______________________________________________
Elecraft mailing list
Post to: [email protected]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
