[CW] Re: CW Digest, Vol 33, Issue 8
KB7QLH at netscape.com
KB7QLH at netscape.com
Fri Jan 19 08:10:01 EST 2007
There was a group of military signal corps students that did much the same thing but they used telephones.
we just put a phone hand set next to the speaker, sent our cw, and cut in head phones for listening.
Living in a barracks, and all.
Mother bell did get up set with us because of signal levels, and helped us get them right.
Bell Labs at Homdale, New Jersey was just down the road, so they were helpfull.
We didn't have Ham Tickets, just high speed CW students.
Richard KB7QLH
--- cw-request at mailman.qth.net wrote:
From: cw-request at mailman.qth.net
To: cw at mailman.qth.net
Subject: CW Digest, Vol 33, Issue 8
Date: Fri, 19 Jan 2007 04:02:26 -0500 (EST)
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Today's Topics:
1. Re: USING A TWO METER RADIO TO SEND CW (mikea)
2. USING YOUR TWO METER RIG FOR CW (Jim Vaughan)
3. Re: USING A TWO METER RADIO TO SEND CW (k0ng at inebraska.com)
4. Re: USING A TWO METER RADIO TO SEND CW (k0ng at inebraska.com)
5. Re: USING A TWO METER RADIO TO SEND CW (David Ring)
6. Re: USING A TWO METER RADIO TO SEND CW (Richard)
----------------------------------------------------------------------
Message: 1
Date: Thu, 18 Jan 2007 08:00:09 -0600
From: mikea <mikea at mikea.ath.cx>
Subject: Re: [CW] USING A TWO METER RADIO TO SEND CW
To: Jim Vaughan <k4txj at arrl.net>
Cc: CW List <cw at mailman.qth.net>
Message-ID: <20070118080009.B80368 at mikea.ath.cx>
Content-Type: text/plain; charset=us-ascii
On Thu, Jan 18, 2007 at 01:17:12AM -0500, Jim Vaughan wrote:
> I remember seeing somewhere that you could modify a two meter fm rig to use
> cw. Does anyone know about this or have the information.
> This is great for code practice to help other hams who don't have the code
> to learn and also build up their speed without having to
> purchase another radio.
>
> Any information would be very much appreciated.
> Please answer off list.
>
> 73 and thanks in advance,
I'm answering on-list because I think it's potentially of interest to
all the listmembers.
Some rigs, such as the Yaesu FT-897 and FT-857, support this natively:
there's an option setting that says to send Modulated CW (audio tones)
when the key is closed while in SSB or FM modes. But these are DC-to-
daylight all-mode rigs, not 2-meter FM.
Ralph, KA5RUZ, has developed a tiny 555-chip-based oscillator that
plugs into the microphone jack of an HT or other rig that doesn't
natively support sending MCW. It requires that you keep the PTT switch
closed while sending, to keep the rig in transmit mode. Pretty much
any 555-based oscillator will do, as long as you filter the sharp
edges (fast rise and fall times) of the waveform. If you've got an MFJ
code practice oscillator, you're very nearly home free: it's just a
matter of making a jumper to go from it to your HT or other rig.
NOTE WELL: The Yaesu/Vertex VX-150 HT uses a 4-conductor 1/8" phono
plug, which is *VERY* difficult to find, and inserting the plug does
disable the built-in speaker. To use this technique with the VX-150
and its relatives, you will have to use an external speaker.
--
Mike Andrews, W5EGO
mikea at mikea.ath.cx
Tired old sysadmin
------------------------------
Message: 2
Date: Thu, 18 Jan 2007 11:08:23 -0500
From: "Jim Vaughan" <k4txj at arrl.net>
Subject: [CW] USING YOUR TWO METER RIG FOR CW
To: "CW List" <cw at mailman.qth.net>
Message-ID: <003a01c73b1a$e147dc40$0202a8c0 at jim6c131a29158>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Thanks to all for the info on using your two meter radio on cw.
73,
Jim, K4TXJ
Louisville, Ky.
------------------------------
Message: 3
Date: Thu, 18 Jan 2007 20:57:55 -0600
From: k0ng at inebraska.com
Subject: Re: [CW] USING A TWO METER RADIO TO SEND CW
To: cw at mailman.qth.net
Message-ID: <20070118205755.c1u9czr8w8sooo80 at webmail.inebraska.com>
Content-Type: text/plain; charset=ISO-8859-1; DelSp="Yes";
format="flowed"
Jim: It would be best to stick to MCW for code practice for the
following reasons:
Most FM radios PLL system is not stable enough for on-off carrier keying.
Most FM radios do not have a BFO or CW filter.
MCW is as easy as getting or building a cheap code practice oscillator and
feeding the audio into the microphone connector to transmit the keyed CW or
simply putting the oscillator speaker or headphone up to the two meter rigs
microphone to transmit MCW. The receiver of course can receive MCW so that
two way contacts can be made which is a lot of fun besides code practice.
An MCW system is cheap, available and very practical but probably best
not used
on repeaters (unless permission from owners/users is given) or used on busy
simplex frequencies and is not legal below 144.100 for sure.
I hope I am not being too simplistic or covering old comments. MCW
would be a great
starting place.
73 and good luck. Charlie, K0NG ..
------------------------------
Message: 4
Date: Thu, 18 Jan 2007 21:00:36 -0600
From: k0ng at inebraska.com
Subject: Re: [CW] USING A TWO METER RADIO TO SEND CW
To: cw at mailman.qth.net
Message-ID: <20070118210036.dkzum0juskokgw8s at webmail.inebraska.com>
Content-Type: text/plain; charset=ISO-8859-1; DelSp="Yes";
format="flowed"
Nice reply Mikea !! 73 DE K0NG ..
------------------------------
Message: 5
Date: Fri, 19 Jan 2007 00:07:33 -0500
From: "David Ring" <djringjr at gmail.com>
Subject: Re: [CW] USING A TWO METER RADIO TO SEND CW
To: "k0ng at inebraska.com" <k0ng at inebraska.com>, cw at mailman.qth.net
Message-ID:
<b7e6a3ef0701182107t386320b6n6af86a21a4271e68 at mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
MCW is a great starting place - I've suggested to "Morse Express" that
it might be a good idea to sell his "T" code oscillator kit with parts
for microphones etc.
I didn't have enough response then, but how about now?
Send Marshall Emm a message asking him for such a kit!
I think it would be a wonderful kit.
73
David Ring, N1EA
On 1/18/07, k0ng at inebraska.com <k0ng at inebraska.com> wrote:
>
> Jim: It would be best to stick to MCW for code practice for the
> following reasons:
>
> Most FM radios PLL system is not stable enough for on-off carrier keying.
> Most FM radios do not have a BFO or CW filter.
>
> MCW is as easy as getting or building a cheap code practice oscillator and
> feeding the audio into the microphone connector to transmit the keyed CW or
> simply putting the oscillator speaker or headphone up to the two meter rigs
> microphone to transmit MCW. The receiver of course can receive MCW so that
> two way contacts can be made which is a lot of fun besides code practice.
>
> An MCW system is cheap, available and very practical but probably best
> not used
> on repeaters (unless permission from owners/users is given) or used on busy
> simplex frequencies and is not legal below 144.100 for sure.
>
> I hope I am not being too simplistic or covering old comments. MCW
> would be a great
> starting place.
>
> 73 and good luck. Charlie, K0NG ..
>
> _______________________________________________
> CW mailing list
> CW at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/cw
>
------------------------------
Message: 6
Date: Fri, 19 Jan 2007 00:34:36 -0500 (EST)
From: Richard <cwmcode at yahoo.ca>
Subject: Re: [CW] USING A TWO METER RADIO TO SEND CW
To: cw at mailman.qth.net
Message-ID: <454376.34767.qm at web52107.mail.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1
Dave, I agree, I'm going to mail my suggestion to
"Morse Express" as well.....This subject came up
before and I thought there was some response to it
albeit luke warm........I use an MFJ "Jim Handy" and
the nice thing about it is it does the automatic PTT
and has adjustable xmit to receive delay etc.....I
dont think there is much to be concerned about re:
using repeaters etc.---if they're anything like they
are in my area theres lots of relatively quiet
periods. As far as simplex goes, I dont think phone
has any special priority there as one poster
suggested, if you're on the simplex QRG then its QRL!!
(-:
--... ...--
Richard VE3MFN
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End of CW Digest, Vol 33, Issue 8
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