In a message dated 96-12-27 09:50:40 EST, you write:
>
>Hi Tom, saw in your comments about pa design that you had measured
>ts940's with considerable output overshoot.
>
>Were you able to cure this and what was the method used?
>
>73 and Happy New Year
>Mark N2QT
I'm posting this cause I got about ten emails, hi. I use an external
negative fixed bias on the ALC line. The ALC from the amplifier can be summed
via diodes, so when it exceeds the fixed voltage it throttles back the
exciter more.
I set the voltage so the exciter just barely makes more power than needed
when the drive (power) is on full.
The best thing to do is put an attenuator pad between the tuned input
circuit of the PA and the relay, so the amplifier requires near near full
exciter power to drive. Most radios I've tested produce more overshoot and
more IMD products (in proportion to the desired output) when the drive is
backed off, so this also cleans up the signal a bit.
In other words, if you have a 150 watt radio and the PA takes 75 watts of
drive, install a 3 dB pad between the tuned input and the transfer relay. IMD
generally improves, and exciter overshoot is less of a problem.
73 Tom
>From AD1C@tiac.net (Jim Reisert AD1C) Sat Dec 28 16:59:42 1996
From: AD1C@tiac.net (Jim Reisert AD1C) (Jim Reisert AD1C)
Subject: NA/Stu Perry Topband Challenge
Message-ID: <199612281802.NAA11311@mailnfs0.tiac.net>
On Sat, 28 Dec 1996 11:44:37 -0500 (EST), Jeffrey Clarke wrote:
> Has anyone sucessfully downloaded the file needed in NA for the
> Topband Challenge from the LTA BBS ??? I am a registered user of NA
> and dialed in to the BBS to get the file (W1BB.TMP) but the download
> feature does not seem to be working ??? Are there any other sources to
> get this file ???
This question would have been better asked on the NA-USER@ve7tcp.ampr.org
reflector.
Send a message to NA-USER-REQUEST@ve7tcp.ampr.org that says SUBSCRIBE.
73 - Jim AD1C
--
Jim Reisert <AD1C@tiac.net> http://www.tiac.net/users/ad1c/
>From c.moon@allnet.it (Lunetta Corrado) Sat Dec 28 19:41:32 1996
From: c.moon@allnet.it (Lunetta Corrado) (Lunetta Corrado)
Subject: HF6V : help setting
Message-ID: <B0000013861@relay.allnet.it>
Hello dear O.M., can anyone help me ?
I'am looking for pratice suggestion for setting the antenna Butternut HF6V
with and without the CPK system :
- if the CPK is istalled is possible to install also the ground system ?
- in the upper condition is necessary 4 radial for band ?
- wath is the sequency for the setting ? in this condicion ?
- this solution i sgood way for dx contact's ?
Thank's in advance and happy New Year to everybody.
__________________________________________________________________________
Corrado Lunetta - I 0 L T X - WWLOC : JN61JQ
Via Mariano Pieroni,19 E-mail : c.moon@allnet.it
00049 Velletri (RM) - Italy Pack AX25 : I0LTX@IK0GDH.ILAZ.ITA.EU
Lat: 41 40 56 N Long: 12 36 45 E DX Cluster: I0LTX > I0OWK-6
Homepage ............ http://www.geocities.com/SiliconValley/Heights/9378
__________________________________________________________________________
>From n6zs@ix.netcom.com (George Steinert) Sat Dec 28 20:15:28 1996
From: n6zs@ix.netcom.com (George Steinert) (George Steinert)
Subject: RFI & Consumer Reports
Message-ID: <199612282015.MAA05783@dfw-ix9.ix.netcom.com>
Contest season seems to bring out the worst in neighborhood RFI
situations. I'm trying to initiate a grass-roots campaign to persuade
the people who publish Consumer Reports magazine to include information
about RFI susceptibility in their consumer electronic product
evaluations.
I have the corporate address (Consumers Union of the U.S., Inc., 101
Truman Avenue, Yonkers, NY 10703-1057) but would feel better about
sending the request to the proper person/office. Does anyone out there
know who would be the best person to be addressed with this matter?
When I find out, I will post info here along with some suggested
language. Maybe all the neighbors would send in their own letter, too.
I see that the ARRL Board of Directors agreed in their Oct. 24-26
meeting to urge the FCC to "...develop and implement effective
mandatory standards for radio frequency susceptibility of consumer
electronic devices within the scope of P.L. 97-259." Incidentally, Ed
Hare of ARRL says he has written to Consumers Union several times with
no response. Perhaps a few thousand letters from the public addressed
to the right person will help CU change their minds about this
important issue and place the focus where it belongs, on the
manufacturers.
73,
George Steinert, N6ZS
n6zs@ix.netcom.com
>From n4gn@iglou.com (Tim Totten, N4GN) Sat Dec 28 21:07:35 1996
From: n4gn@iglou.com (Tim Totten, N4GN) (Tim Totten, N4GN)
Subject: RFI & Consumer Reports
Message-ID: <Pine.GSO.3.95.961228153908.16580A-100000@iglou2>
My apologies to those of you outside the U.S. if this appears to be a
parochial matter, but I think it could indicate the beginnings of a trend
that, if left unchecked, could eventually affect CONTESTERS worldwide.
On Sat, 28 Dec 1996, George Steinert, N6ZS wrote:
> I see that the ARRL Board of Directors agreed in their Oct. 24-26
> meeting to urge the FCC to "...develop and implement effective
> mandatory standards for radio frequency susceptibility of consumer
> electronic devices within the scope of P.L. 97-259." Incidentally, Ed
> Hare of ARRL says he has written to Consumers Union several times with
> no response. Perhaps a few thousand letters from the public addressed
> to the right person will help CU change their minds about this
> important issue and place the focus where it belongs, on the
> manufacturers.
Sadly, it seems the FCC may be headed in the opposite direction. Reed
Hundt released his 1997 FCC Agenda this week. It's a 29-page,
single-spaced expansion on the outline he gave in an earlier speech. To
put it mildly, I was NOT impressed with Mr. Hundt's sense of priorities
for the Federal Cash Cow! In 29 pages, none of my own interests (either
professional, ham-related, or just as "Joe Citizen") even got a single
mention! (O.K., he did indicate that he wants to expand electronic filing
based on the success it had in amateur licensing, but that's old news.)
More to the point, there is a strong hint that Reed may want to WEAKEN,
rather than STRENGTHEN some existing interference criteria. Here's a
quote from his 1997 Agenda:
"We also plan to review line-conducted emissions standards. Currently,
Part 15 and Part 18 of our rules limit intentional and unintentional
radio signals entering power lines from electronic devices. The present
limits have not been reviewed for far too long and may be unnecessarily
inhibiting some high technology products and adding unnecessary costs to
others. We will review present rules relating to personal computer power
supplies, high efficiency lighting systems, ultrasonic devices, and LANs
using carrier current signalling. Changing these rules probably will
require a program of field experiments to verify what level can be
permitted without causing harmful interference to radio users. This will
be done over the next year. We will rely on the private sector to the
extent feasible. But we have here further proof of the need for the FCC
to have a slim but smart technology capability."
If you'd like to see what else Mr. Hundt has in mind for 1997, you can
dowload his agenda in a couple of formats from the top page of the FCC
site (http://www.fcc.gov).
73,
Tim Totten, N4GN (nee KJ4VH)
n4gn@iglou.com n4gn@contesting.com
http://www.iglou.com/n4gn/
>From jimkn4qv@juno.com (James c Rogers) Sat Dec 28 23:07:13 1996
From: jimkn4qv@juno.com (James c Rogers) (James c Rogers)
Subject: Grid Square ?
Message-ID: <19961228.230532.5215.2.jimkn4qv@juno.com>
Help, can someone tell me what my grid square is? My location is Albany,
Ga.
84.1W, 31.3N.
Thanks so much,
Jim
jimkn4qv@juno.com
>From n7tr@rnodx.org (Rich Hallman N7TR) Sat Dec 28 23:25:14 1996
From: n7tr@rnodx.org (Rich Hallman N7TR) (Rich Hallman N7TR)
Subject: FT-1000D keying??
Message-ID: <BMSMTP8518153540Phallman@mail.greatbasin.net>
Looking for any mods that allow you to use the Internal Keyer
in the FT-1000 and also use an external Keyer (Computer..ect..)
to key the radio. Stock from the factory, you only have one option. Internal
or External....Not both.
Thanks!!
Rich N7TR Reno
***********************************************************************
Richard Hallman N7TR@RNODX.ORG
11870 Heartpine St "Big is good...Tall is better!"
Reno NV 89506 ex: KI3V, A92FN, HL9RH, KI3V/VP9
702 677-1106 /WP4, /HP, /VO2, N3AMK
************************************************************************
>From aa0cy@robertwanderer.gardnerville.nv.us (ROBERT WANDERER) Sun Dec 29
>00:42:18 1996
From: aa0cy@robertwanderer.gardnerville.nv.us (ROBERT WANDERER) (ROBERT
WANDERER)
Subject: RFI & Consumer Reports
Message-ID: <01BBF4DE.29218400@robertwanderer.gardnerville.nv.us>
Better make sure the next house you buy has a built-in Faraday shield or,
better yet, a screen room!
(Maybe we can convince the local authorities that a 100' tower causes less
problems than a 50-footer?)
73 Bob AA0CY
----------
From: Tim Totten, N4GN[SMTP:n4gn@iglou.com]
Sent: Saturday, December 28, 1996 8:07 AM
To: George Steinert
Cc: cq-contest@tgv.com
Subject: Re: RFI & Consumer Reports
My apologies to those of you outside the U.S. if this appears to be a
parochial matter, but I think it could indicate the beginnings of a trend
that, if left unchecked, could eventually affect CONTESTERS worldwide.
On Sat, 28 Dec 1996, George Steinert, N6ZS wrote:
> I see that the ARRL Board of Directors agreed in their Oct. 24-26
> meeting to urge the FCC to "...develop and implement effective
> mandatory standards for radio frequency susceptibility of consumer
> electronic devices within the scope of P.L. 97-259." Incidentally, Ed
> Hare of ARRL says he has written to Consumers Union several times with
> no response. Perhaps a few thousand letters from the public addressed
> to the right person will help CU change their minds about this
> important issue and place the focus where it belongs, on the
> manufacturers.
Sadly, it seems the FCC may be headed in the opposite direction. Reed
Hundt released his 1997 FCC Agenda this week. It's a 29-page,
single-spaced expansion on the outline he gave in an earlier speech. To
put it mildly, I was NOT impressed with Mr. Hundt's sense of priorities
for the Federal Cash Cow! In 29 pages, none of my own interests (either
professional, ham-related, or just as "Joe Citizen") even got a single
mention! (O.K., he did indicate that he wants to expand electronic filing
based on the success it had in amateur licensing, but that's old news.)
More to the point, there is a strong hint that Reed may want to WEAKEN,
rather than STRENGTHEN some existing interference criteria. Here's a
quote from his 1997 Agenda:
"We also plan to review line-conducted emissions standards. Currently,
Part 15 and Part 18 of our rules limit intentional and unintentional
radio signals entering power lines from electronic devices. The present
limits have not been reviewed for far too long and may be unnecessarily
inhibiting some high technology products and adding unnecessary costs to
others. We will review present rules relating to personal computer power
supplies, high efficiency lighting systems, ultrasonic devices, and LANs
using carrier current signalling. Changing these rules probably will
require a program of field experiments to verify what level can be
permitted without causing harmful interference to radio users. This will
be done over the next year. We will rely on the private sector to the
extent feasible. But we have here further proof of the need for the FCC
to have a slim but smart technology capability."
If you'd like to see what else Mr. Hundt has in mind for 1997, you can
dowload his agenda in a couple of formats from the top page of the FCC
site (http://www.fcc.gov).
73,
Tim Totten, N4GN (nee KJ4VH)
n4gn@iglou.com n4gn@contesting.com
http://www.iglou.com/n4gn/
>From n0ss@socketis.net (Tom Hammond) Sun Dec 29 01:28:42 1996
From: n0ss@socketis.net (Tom Hammond) (Tom Hammond)
Subject: FT-990 & Amplifier Switching
Message-ID: <199612290128.TAA30534@mail.socketis.net>
At 09:37 AM 12/28/96 -0500, W8JI wrote:
>I built a little circuit that goes across my key (not the output of the
>keyer, but the key itself). When I close the key, it directly closes the amp
>relay contacts and all the other relays. It has an open collector output, and
>that output is in parallel with the rigs relay output. So before the rig even
>gets a closure from the keyer the antenna relays are sent on their way to the
>transmit mode.
Do you also have a circuit to ensure that the amplifier T/R relay
remains CLOSED while there's RF output from the amplifier, to avoid
hot-switching on the BREAK as well as the make? Or is this build
into the amplifier and you're just doing the pre-keying to ensure
a 'clean' make every time?
73 - Tom Hammond N0SS
>From rlboyd@CapAccess.org (Rich L. Boyd) Sun Dec 29 01:41:05 1996
From: rlboyd@CapAccess.org (Rich L. Boyd) (Rich L. Boyd)
Subject: College club stn, Wheaton (IL) College
Message-ID: <Pine.SUN.3.91-FP.961228203232.29128E-100000@cap1.capaccess.org>
When I arrived at Wheaton College (Illinois) in 1970 as an active
DXer/contester, I eagerly looked for the club ham station, which I knew
every college certainly must have. I asked everyone that seemed worth
askign about it and no one knew a thing. Then one day I spotted the
tribander atop the limestone campus landmark building which was on a nice
small hill. I could also see the coaxes looping into a particular
window, so I knew that's where the hamshack was.
Found the only access seemed to be thorugh a (locked) door up into the
attic. Nobody knew anything about access. Hey, I was just a freshman
and didn't really know who to ask anyway, or how to go about it. Kept
trying the doorknob every day and one day it was ajar. Walked on
catwalks across the attic amongst retrofitted ductwork, insulation, and
such, in the 100-year-old building. Was able to spot ham gear covered by
thick plastic and a thick coating of dust on desks -- through a crack in
a wall. Another locked door. It was apparent no one had used the
station in many years. I was able to pry up a couple stairsteps and
break in through a closet. I could then let myself out through the
door. Once inside I found a copy of the license with trustee's name and
address and was able to contact him. The station hadn't been used since
the fifties. The gear, mint condition 75A-4 and KWS-1 Collins and a
Gonset amp (wow, had never used an amp before!). I knew the Collins gear
was super great, much better than the Hallicrafters SX-101 and Viking
Challenger at home. Got keys from the trustee and I was off and running
with my own personal ham club (should have had vanity club calls then!).
Then I made the mistake of announcing the activation of the club -- 3X5
cards on dorm bulletin boards to try to locate other hams. Came up with
a dozen or so. A year or so later the other guys voted to sell the
Collins at the Wheaton Hamfest and buy the brand, spanking, new Drake
B-line. I was bothered by their decision, but that's what happened. If
I had been more savvy at the time I could have picked up the Collins gear
for myself, at bargain prices.
I did quite a bit of operating in contests from there, mostly using my
own call, WA3DSD/9. Used the club call W9ZXR occasionally. I just
looked it up in Buckmaster and it appears it has lapsed. Ah well.
73 - Rich Boyd, KE3Q
>From n2uck@juno.com (Roman S Makuch) Sat Dec 28 05:59:04 1996
From: n2uck@juno.com (Roman S Makuch) (Roman S Makuch)
Subject: Svetlana ?
References: <1.5.4.32.19961227205254.00668adc@aloha.net>
Message-ID: <19961228.210949.7911.0.n2uck@juno.com>
They also advertise in numerous papers and magazines. Better known as a
mail order bride (that turns into a pumpkin once she gets a green card)
73 de Roman, N2UCK
On Fri, 27 Dec 1996 10:52:54 -1000 jreid@aloha.net (Jim Reid) writes:
>Got this email the other day. Suppose this is
>part/subsidiary of Svetlana Electron Devices?
>No ref to www.Svetlana.com, and the web site that is
>given does not mention electron devices.
>
>>" SVETLANA INTRODUCTION & MARRIAGE AGENCY
>> St Petersburg Russia
>> ---------------------------------------
>> *4-year experience
>> *grown up informational base
>> *Visa-support
>> *apartments for lease
>> *interpreters
>> *Friendly English-speaking staff
>> ---------------------------------------
>>
>> Dear Friend,
>>
>>We are glad to invite you to join our catalogue free*.
>>Please send us your photo and ad profile by regular
>>mail**
>>
>>Soon you will be get letters from nice, family-oriented
>>Russian ladies, residents of St Petersburg. Please
>>visit our website for additional information.
>>
>> Find your fortune in St Petersburg !
>> With best regards,
>>
>> Merry Xmass !
>>
>> Svetlana Novikova, VP
>>
>>**************************************
>>SVETLANA Agency, St Petersburg
>>39 room 21/4 3-rd Sovyetskaya str.
>>193017 Russia
>>http://www.svetlana.ru/index.html
>>**************************************
>>
>>* Only for first thousand clients this service is free
>>** Please don`t use email for sending us your profiles:
>>we can`t operated with 10 Mb or more of gifs or Jpgs."
>
>Perhaps an available staff for your next multi effort from
>St Petersburg? Helpers for changing tubes as needed....?
>
>Happy Holidays and a Great New Year to Come!
>
>73, Jim, KH7M
>
>
>
|