From: wd5n@msg.ti.com
Subject: IC-775DSP Questions answered
Thanks to K1CC for his answers to my questions, which I now forward to
the group. I won't waste space repeating the questions as Rich's answers
make it pretty clear what the questions were. Also, Rich indicates
he has submitted a brief review of the rig to the NCJ so we can look
forward to more info when that comes out.
> 1. The subreceiver uses the same filters as the main receiver, and is also
> restricted to the same band.
>
> 2. The main and subreceivers can only be mixed (there's a balance control),
> but no stereo is possible. Furthermore, both must use the same antenna,
> even though there's a 2-antenna input and front panel switching.
>
> 3. The internal power supply is 110/220 switchable.
>
> 4. Beverage input is like most radios -- there's a "radio out" and
> "antenna in" jack in the back which is normally jumpered, you remove the
> jumper and do your own switching externally.
Thanks also to Peter Hutter for his comments.
73, Dave Harper WD5Neato <wd5n@msg.ti.com>
>From Ronald D. Rossi" <rrossi@VNET.IBM.COM Mon Jul 24 15:33:58 1995
From: Ronald D. Rossi" <rrossi@VNET.IBM.COM (Ronald D. Rossi)
Subject: "Is the frequency in use?" or "QRL?"
In a previous message, N0AX wrote:
>>
>> Legal limit into some nice antennae
>> would sure help. The higher the power you use, then the better
>> your ears should be as well. Higher power doesn't reciprocate with
>> better reception as better antennae do.
>>
>
>Actually, nice antennae help on the receiving end, too. It's much less
>likely that with good antennas, you won't hear the other channel
>occupants. I think there's a lot more contest QRM generated by ops with
>small antennas running a full gallon. This is so because they can't/don't
>hear well.
>
I agree 100%. That is what I said. To paraphrase: Better antennae
receive better, higher power does not. The ears I refer to in my
statement are those of the operator not the station.
>K3ZO and the others at the "top of the food chain" consider QRM from a
>strategic standpoint; Can I keep my rate high? Can I hear the third level
>of JA's and Eastern EU? Will the VU's call me here, or will I have to move?
>
>Those of us farther down on the hog, so to speak, must consider QRM from a
>survival standpoint; Can I hold the frequency at all? Will I hear the
>first level of DX? Will they be interested if they can hear me? How
>close can I get to K3ZO before fire comes out of the speaker?
>
>It's funny to consider that the questions about transmitting are
>usually answered by receiving.
>
>73, Ward N0AX
>
>
Hey, again I agree! Thanks for you comments Ward and I look forward to
working you from the knuckle off the hind quarters of the hog.
73 de N1PBT...Ron (rrossi@vnet.ibm.com) ><>
>From Lau, Zack, KH6CP" <zlau@arrl.org Mon Jul 24 15:46:00 1995
From: Lau, Zack, KH6CP" <zlau@arrl.org (Lau, Zack, KH6CP)
Subject: QRL on VHF calling frequencies
Message-ID: <3013B250@arrl.org>
Does this logic make sense?
Because people aren't suppose to ragchew on
calling frequencies, it doesn't make sense to
ask if these frequencies are in use. Merely listening
for a few minutes and hearing nothing is adequate.
Incidentally, I actually use the calling frequencies
as they are intended--find someone and move off
to other frequencies--often to other bands...
Zack Lau KH6CP/1zlau@arrl.org
See you in the UHF CONTEST from FN33KD on all
bands through 24 GHz after I get back from Colorado
Springs and the Central States Conference.
>From ke7gh@primenet.com (Brian Short) Mon Jul 24 15:53:05 1995
From: ke7gh@primenet.com (Brian Short) (Brian Short)
Subject: Sorry-Multiples
Message-ID: <199507241459.HAA27537@mailhost.primenet.com>
Hi,
I received 2 copies of one of my posts, myself. Sorry! I will contact
my Internet provider today. Several users have been having difficulty
with the news reader and the mail reader. I suppose it could be coming
from there?
Sorry, Brian
>From jholly@hposl62.cup.hp.com (Jim Hollenback) Mon Jul 24 18:45:07 1995
From: jholly@hposl62.cup.hp.com (Jim Hollenback) (Jim Hollenback)
Subject: transformers for EWE antena's
Message-ID: <9507241045.ZM14940@hpwsmjh1.cup.hp.com>
can the QRL discussion QRX for a technical question?
I built up some transformers for the top fed EWE antennas I plan to
put up this year. (As you might recall, this is a 9:1 with a 1:1
isolation transformer). So I thought, "Hey, let check these out with my
Autek RF-1 before I mount them!". Perhaps this was not a good idea.
I put a 470 ohm resistor across the "top" and "bottom" connectors and
hooked my RF-1 up to the bnc that goes to the 1:1 matching transformer
that is across the bottom windiing of the 9:1 transformer. The SWR is
high (around 7-8:1 and the Z is about 82 ohms). Hmmm, not so good.
I then built another 9:1 transformer and wired it up to a SO-239 and
tried this one out. The 470 ohm resistor is across the entire transformer
and the RF-1 is hooked to the bottom winding. This one reads a SWR of
around 6:1 and the Z is about 64 ohms. More interesting, the SWR goes
off scale when the resistor is disconnected, but the Z stays about the
same.
I was using a Amidon FT-82-??. I forget the mix, but it was the one
in "Low Band Dxing" and the turns was as in John's book. The frequency
I used was 3.55 MHz. I wound the windings like in W2FMI's book on
transmission line transformers. Since the cores seemed big enough,
I used 20 gauge wire.
So, is this a normal reading? (a little voice keeps saying NO)
Perhaps I should use a different winding method?
Perhaps someone has a suggestion?
Oh, yes, I plan to use these antennas for CONTESTing. (there, got the
C word in)
thanks,
Jim, WA6SDM
jholly@cup.hp.com
You may now conitinue your QRL discussion.
>From ke7gh@primenet.com (Brian Short) Mon Jul 24 20:19:14 1995
From: ke7gh@primenet.com (Brian Short) (Brian Short)
Subject: Sorry-Multiples
Message-ID: <199507241925.MAA13237@mailhost.primenet.com>
Sorry Bob,
According to the highly trained technical staff at Primenet Technical
Support, their Mail Server got "SPAMMED." This term is not in my Funk
and Wagnall, but I assume it means a bad, perhaps malicious, attack on
the system by a misdirected individual or individuals. Apparently, the
Mail Server became "ILL." This technical stuff! I hope it is over, and
I am working directly with my provider. I even told them about the type
AAA+ folks complaining etc. Again, sorry! 73 de Brian
>WHAT DID YOU SAY?
>WHAT DID YOU SAY?
>
>DON'T WORRY ABOUT IT.
>DON'T WORRY ABOUT IT.
>
>AM I REPEATING MYSELF.
>AM I REPEATING MYSELF.
>
>N5RP, Bob
>Houston, Texas
>Email: perring@icsi.net
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