BC Hash on 20M, Poor dynamic range?

K2WK at aol.com K2WK at aol.com
Sat Aug 12 17:13:39 EDT 1995


Recently, I've been getting an S-8 hash on 20M. In an attempt to find the
source of this interference I found a very loud Radio Quebec on 13.670.  The
hash seems to follow the modulation of the BC station.  This station is so
loud that it pins the meter on both an FT-1000 and IC-765; a first for the
FT.  The hash appears on both rigs when this station is on the air.  I guess
this phenomena is due to poor(?) dynamic range? Turning off the preamp
 and/or adding some attenuation helps the matter.  But, how am I going to
copy those 2nd tier Eu stations during a contest with the attennuator on?
 Has anyone else experienced this and what have you done to rectify the
situation.  Would an ICE filter help on these "close-in" stations?  Regards,
de Walt - K2WK

>From short at indirect.com (Brian Short)  Sat Aug 12 16:26:45 1995
From: short at indirect.com (Brian Short) (Brian Short)
Date: Sat, 12 Aug 1995 15:26:45 +0000
Subject: Headphone Suggestions
Message-ID: <199508122231.PAA14412 at bob.indirect.com>

Here are the few replies to my question about a good set of headphones.

73 de Brian


HEIL with HC4 element, works excellent, can attach foor switch,
good modulation, light weight and you can get connection cable for 
any type of rig.


Cant beat a Heil Pro-Set,  although read they just came out with a smaller.
lighter version.

> What is a good set of headphones for contest operation?

K1VR:  If you prefer an occlusive earpiece, the AKG K240 is
popular among some YCCC types.  If you prefer open cell
foam, non-occlusive earpieces, the Heil standard headset
(BM-10) is fine -- just be prepared to replace the sounder
(the round part with the transducer which actually produces
sound) every four or five years, when it begins to sound


Interested in your responses.  I've experimented with various but don't 
know which are best.  Ones with super-excellent frequency response I'd 
think would be best.


If fan or blower noise is not a problem, I use the Radio Shack Pro fones.
The plug on them says Koss, so you know they're pretty good.  Very light
weight, ears don't hurt after >24 hrs of use. On sale abt $20, normally $40.
Wait for the sale.

If shack noise is a problem, (and my garage mounted 100 CFM @ 2" H2O
blower is still very noisy) I use the Heil Pro Set. Cancels that noise very
well, but not as comfortable as the R/S-Koss fones.


 I bought two pairs of Radio Shack Nova 28 headsets on sale.  They
are very inexpensive, have separate audio levels for each ear,
and sound pretty good. Have used them at W3LPL with a splitter to
allow two ops to listen on same rx.  Same for FD.  If the pot
control gets loose, there is a little cylindrical insert in the
middle of the knob which covers a screw.  Just pry the little
plastic cylinder out with a pointed tool, it is not glued in.
Once the cylinder is out, you can tighten the screw, then put
the cylinder back.  This is all done from the outside.  I don
t recommend opening up the headset and working inside unless
it is absolutely necessary as the components are very delicate.
(Speaking from experience....I broke a wire trying to figure out
how to tighten the knob until I figgered out you don't have to
take the headset apart!)  Good luck  -  

>From Tim Totten, KJ4VH" <kj4vh at iglou.com  Sun Aug 13 04:26:13 1995
From: Tim Totten, KJ4VH" <kj4vh at iglou.com (Tim Totten, KJ4VH)
Date: Sat, 12 Aug 1995 23:26:13 -0400 (EDT)
Subject: KJ4VH/7 NAQP from Wyoming
Message-ID: <Pine.SOL.3.91.950812225334.19312A at iglou.iglou.com>

NAQP is one of my favorite contests, but as luck would have it, I've been 
out of town for most of the last several runnings.  Once agn, I found 
myself away from home on NAQP wknd--this time in Jackson Hole, speaking 
at the WIMU (Wyoming Idaho Montana Utah) Hamfest.  Fortunately, N7NG was 
gracious enough to allow me to borrow his stn off and on for a couple 
hours during the terrific BBQ hosted at his place Saturday eve, so I 
could hand out WY mults between plates of food and conversation with some 
of the other contesters and DXers from the region.
Due to a nasty storm the wknd before NAQP, Wayne's 40-2CD was sitting on
the ground, so no Qs on 40.  And the QRN on 80 really sucked.  It was a
real struggle to copy anyone on that band.  I tried a few jaunts to 160,
but couldn't hear ANYONE!  Nice Es openings on 10 and 15 to the Atlantic 
states and Gulf coast. 
I didn't have a CW keying interface for my laptop with me, so I actually
had to send some with the paddles (heaven forbid).  Boy has my sending
gotten rusty over the past couple years!  I think every time N6ZZ called
me, I sent his call as N67Z, N6Z7 or some similar variant.  Sorry Phil!  

Someone needs to make a version of PED or RUFZ that requires you to send 
the call back manually with paddles.  I need the practice!
Well, here are my totals.  Sorry I couldn't operate longer.  Tnx for 
letting me borrow your fine stn, Wayne!

     band        QSOs       mults
     160            0          0
      80           63         23
      40            0          0
      20          109         37
      15           21         12
      10           16         10
     total:       209         82     claimed score:  17,138   

 Tim Totten, KJ4VH       kj4vh at iglou.com | ". . . moderation in the pursuit
 http://www.iglou.com/members/kj4vh.html |     of justice is no virtue."
                  DX IS!                 |     --Barry Goldwater, K7UGA

>From ac1o at sunken.gate.net (Walt Deemer)  Sun Aug 13 05:42:04 1995
From: ac1o at sunken.gate.net (Walt Deemer) (Walt Deemer)
Date: Sat, 12 Aug 95 23:42:04 EST
Subject: Intl Radio & Computers Phone Disconnected
Message-ID: <9508130442.1tj0 at sunken.gate.net>

International Radio and Computers' phone number has been disconnected 
and their old store is all closed up. 
According to their next-door neighbor, Treasure Coast Honda, "they have 
moved in with us, but are on vacation until the 22nd".  (I did not ask 
"the 22nd of which month/year".)  TC Honda did not have a new phone 
number for IRC.
I will try to contact IRC on the 22nd, and will post any information 
I get to the reflector.  Treasure Coast Honda's number, meanwhile, is 
(407) 464-6385. 
The IRC legend continues... 
73 and GL, Walt, AC1O   "AC1O at sunken.gate.net" 

>From n4zr at ix.netcom.com (Pete Smith N4ZR)  Sun Aug 13 11:34:16 1995
From: n4zr at ix.netcom.com (Pete Smith N4ZR) (Pete Smith N4ZR)
Date: Sun, 13 Aug 1995 03:34:16 -0700
Subject: Aftermarket filters/IRC
Message-ID: <199508131034.DAA03771 at ix2.ix.netcom.com>

Periodically, there is a flurry of complaints about IRC service and/or rumor
that they are/will be closing down.  since the demise of Fox Tango, IRC has
been the only US supplier of after-market crystal filters (and pretty good
ones, in my *dx* and *contest* experience with my TS-930, at least).

After the last round of complaints, I made a bit of an effort to check on
the potential availability of after-market filters for the usual Japanese HF
rigs, thinking that there might be a need to replace IRC.  Clearly, IRC's
filters come from there.  Nonetheless, my Japanese connection (who's pretty
savvy) says that there is no aftermarket for such filters in Japan. 

Does anyone know:

1.  What the supplier situation is in Japan?
2.  What IRC's source is?
3.  Name/address of JA manufacturers of good crystal filters for the big
three HF radios?

Pete Smith N4ZR
n4zr at ix.netcom.com *** please note new address ***

Radio Free West Virginia (under construction)

>From km9p at is.net (Bill Fisher)  Sun Aug 13 13:35:51 1995
From: km9p at is.net (Bill Fisher) (Bill Fisher)
Date: Sun, 13 Aug 1995 08:35:51 -0400
Subject: Intl Radio & Computers Phone Disconnected
Message-ID: <199508131235.IAA06830 at mail1.is.net>

>International Radio and Computers' phone number has been disconnected 
>and their old store is all closed up. 
>According to their next-door neighbor, Treasure Coast Honda, "they have 
>moved in with us, but are on vacation until the 22nd".  (I did not ask 
>"the 22nd of which month/year".)  TC Honda did not have a new phone 
>number for IRC.

FYI (You didnt hear it from me please) Treasure Coast Honda is owned by the
same person that owns IR&C.



>From wfeidt at cpcug.org (Bill Feidt)  Sun Aug 13 14:18:27 1995
From: wfeidt at cpcug.org (Bill Feidt) (Bill Feidt)
Date: Sun, 13 Aug 1995 09:18:27 -0400
Subject: WAE CW Results for NG3K
Message-ID: <199508131319.JAA08693 at cpcug.org>

         QSOs    QTCs    Countries

   20     25      20        11
   40     36      39        14

         Score: 7,680

20 watts; 1/2 length G5RV

Just a token effort Saturday evening.  WAE is a great
contest though.  The QTC component really sets it

wfeidt at cpcug.org

>From short at indirect.com (Brian Short)  Sun Aug 13 18:00:16 1995
From: short at indirect.com (Brian Short) (Brian Short)
Date: Sun, 13 Aug 1995 17:00:16 +0000
Subject: CW Radio-2 Lockout?
Message-ID: <199508131705.KAA28932 at bob.indirect.com>


I recently came up with a simple mechanism for ensuring one transmit signal
(only) at a time.  This scheme seems to work well with RTTY and SSB, but I
am wondering if there is a better way for CW?  Below is a description of the
scheme I devised.  

Please excuse the bandwidth if you saw it on the RTTY reflector!

The simple scheme uses the FT-990 REMOTE 8-pin DIN jack on the rear of
the radio.  A switch inside the radio (S6801) enables a mechanical relay
with common, normally open (N/O), and normally closed (N/C) contacts as 
shown below.  My proposal is to run the PTT for radio #2 through the N/C 
contact of the relay.  When the FT-990 is keyed, it becomes open and 
radio #2 is off the air.

2 Norm CLOSED*
3 GND*
4 Norm OPEN
5 Relay Common*
7 +13.8v 200ma

PTT IN  (PHONO PLUG)  ------------------------>| (5)
RADIO 2 (PHONO JACK)  <------------------------| (2) FT-990 REMOTE
GND                   -------------------------| (3)

NOTE:  The internal switch must be activated to enable the relay.  Before
       selecting the relay a switching transistor is connected to pin 4.

The PTT line of the RTTY TU or SSB Mic is fitted with a phono plug and jack.
To bypass the lockout, just plug them together.  Otherwise, plug in the cable
to the REMOTE jack.

Running the CW key line through the PTT of the other radio keyline seems it
would result in a chopped up mess on radio #2.

How can I positively lockout radio #2 for CW use (simply)?  Any comments?

73 de Brian

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