FT-1000 speaker BANG
WX0B at aol.com
WX0B at aol.com
Mon Aug 7 15:45:55 EDT 1995
In a message dated 95-08-07 03:06:44 EDT, s56a at ljutcp.hamradio.si (Marijan
Miletic) writes:
> cq-contest at tgv.com
>
>Hi Contesters,
>I unpluged headphones 8 hours after the end of EUHFC and I heard famous BANG
>in
>the FT-1000 speaker. This speaks a lot for a quality of components uaed a
>as 1 mF electrolytic capacitor decopling DC from speaker did NOT discharge.
>Cheap 100 Ohm resistor might solve this problem but it can not be found even
>in
>rigs manufactured by famous Hi-Fi company.
This sounds really bad to me. I would think that Yeasu wouldn't cut corners
here but will try to verify this
with the schematics. An old trick and quick fix which would not need any 100
ohm resistors would be
to put a second 1mF back to back with the first one and then solder a couple
of 1n4001diodes also back to back around the caps. Make sure the diodes
would conduct preventing the caps from seeing reverse voltage larger than .6
V (diode junction) while the diode conducts that cycle to the other cap.
You have then created a non-polarized large capacitor. Which won't blow up
or distort the audio.
+ +
_________| |____________| |_______________
| | | | | | |
| | |
|____ |\ |_______|______| /|______|
|/ | | \|
These babies can handle lots of power.
But this technique is useful when you need like 100 MF....not only 1 Mf. At
1 mf there are lots of non-polar caps available.
This is analogous when I bought my first "Contest" rig an IC781 and only mike
I had to make a quick and
dirty boom mike was a cartridge I paid a buck for. So I used a $5000 rig
with a $1 mike for the first contest I used the rig on......go figure what a
ham will do, but its no excuse for Yeasu..HI.
73 Jay WX0Banana
>From sellington" <sellington at mail.ssec.wisc.edu Mon Aug 7 19:53:26 1995
From: sellington" <sellington at mail.ssec.wisc.edu (sellington)
Date: 7 Aug 1995 13:53:26 -0500
Subject: August CQ Magazine Cover
Message-ID: <n1404318844.89369 at mail.ssec.wisc.edu>
>Anyone ever hear of other risk
>mitigation techniques?
Seems I once heard about some kind of latches between sections, which
could be operated from the ground with ropes, or something. Guaranteed,
I suppose, to get jammed in the worst possible configuration.
Scott K9MA
sellington at ssec.wisc.edu
>From H. Ward Silver" <hwardsil at seattleu.edu Mon Aug 7 20:26:44 1995
From: H. Ward Silver" <hwardsil at seattleu.edu (H. Ward Silver)
Date: Mon, 7 Aug 1995 12:26:44 -0700 (PDT)
Subject: IARU announces Drug Testing (fwd)
Message-ID: <Pine.3.07.9508071244.B2875-a100000 at bach.seattleu.edu>
>
> How will multi-op stations be tested? Samples of each operator, or some
> sort of composite test?
>
> 73, Jim N6IG
Naw, they'll just confiscate the coffee can after each contest ;-)
-.-. --.- -.-. --.- -.-. --.- -.. . -. ----- .- -..- -..-. --...
______________________________
| ---- --------- o o o o |
| | / | | N 0 A X | o o o o | "I don't know why they call it
| ---- --------- | wireless...I've never seen so
| () () /^^^\ () () () | many wires in all my life!"
| O o o o (o ) () () () | From the 1920's and
| O o o o \___/ o o o o o | never more true!
|______________________________|
\_/ H. Ward Silver, N0AX \_/
hwardsil at seattleu.edu
>From Roy Hradilek <73374.2465 at compuserve.com> Mon Aug 7 20:29:55 1995
From: Roy Hradilek <73374.2465 at compuserve.com> (Roy Hradilek)
Date: 07 Aug 95 15:29:55 EDT
Subject: NAQP Score/Breakdown: AD5Q
Message-ID: <950807192954_73374.2465_DHS25-1 at CompuServe.COM>
Band QSO Mult
-------------
160 16 8
80 61 25
40 155 43
20 219 49
15 107 39
10 72 29
---- --- ---
Tot: 630 193 --> 121,590
Duh, I have a new wire beam on 40 - something I should have thought of a long
time ago. This was fun!
I don't think the low bands played very well. There was much to do on the
high bands, and that's were the action was. Lotsa mult movin'.
Roy -- AD5Q...
>From ke7gh at primenet.com (Brian Short) Mon Aug 7 20:38:00 1995
From: ke7gh at primenet.com (Brian Short) (Brian Short)
Date: Mon, 07 Aug 1995 19:38:00 +0000
Subject: NAQP CW SCORES (v.1)
Message-ID: <199508071938.MAA23757 at mailhost.primenet.com>
NA QSO SUMMARY SHEET
Contest Dates : 05-Aug-95, 06-Aug-95
Callsign Used : KE7GH
Operator : KE7GH
Category : sop
Default Exchange : Brian AZ
Name : Brian K. Short
Address : 1994 E Laguna Dr
City/State/Zip : Tempe, AZ 85282
Country : United States
Team/Club : Central Arizona DX Association
BAND Raw QSOs Valid QSOs Points Mults
__________________________________________________
80CW 21 21 21 10
40CW 128 128 128 42
20CW 271 271 270 49
15CW 80 80 80 32
__________________________________________________
Totals 500 500 499 133
Final Score = 66367 points.
>From lvn at fox.cen.com (Larry Novak) Mon Aug 7 21:05:32 1995
From: lvn at fox.cen.com (Larry Novak) (Larry Novak)
Date: Mon, 7 Aug 95 16:05:32 EDT
Subject: TDXS NAQP CW Team Scores
Message-ID: <9508072005.AA10171 at cen.com>
>
> Texas Dx Society NAQP CW Team Scores:
>
> K5GA, Bill 690 x 217 = 149,730
> K5GN, Dave 652 x 212 = 137,376
> AD5Q, Roy 630 x 193 = 121,590
> K7UP (KN5H), Steve 624 x 207 = 129,168
> W5ASP, Joe 502 x 162 = 82,830
>
> 620,694
Good Gawdalmighty ........ Now we don't want to hear any griping from
TX after CQWW.
Great job!
Larry, K3TLX
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