I understand all that John but it is also rated at a 100 percent duty cycle
and 30 words per minute CW is far from that at a 2 seconds burst of
transmission.
Phil.
[log in to unmask]
----- Original Message -----
From: "John Miller" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Sunday, February 22, 2009 6:26 PM
Subject: Re: CW DX Contest - you won't believe
> The reduction is to protect the finals from instant melt down, you keep
> running with a high SWR, much more than 2:1trust me, at 1 watt or 100,they
> won't last long. Solid state amps are even worse, you get more than a 1.9
> and run it that way for any length of time at all, it's time for new
finals.
> Some say with amps 1.7 is the limit. I don't plan to run a solid state amp
> until they're cheaper to fix and have been on the market a bit longer,
for
> now my SB-200 will do or if something happens to it an AL-811H or
something
> similar. An auto tuner for high power is a lot closer in the future, this
> roller inductor one I got real cheap I use now, I don't like but I do
> alright with it and the TW1.
> ----- Original Message -----
> From: "Phil Scovell" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Sunday, February 22, 2009 7:53 PM
> Subject: Re: CW DX Contest - you won't believe
>
>
> > John,
> >
> > That's what the automatic power reduction circuitry is for. The amp has
> > the
> > same thing, In fact, it is adjustable. You can set the max to anything
> > you
> > want and the amp won't key if you are at the level, or above, such as 3
to
> > 1
> > for example. The manual, in fact, has a complete section of the auto
> > power
> > reduction circuitry features in order to protect the finals. I must
> > admit,
> > on the other hand, the cooling fan on the 35 amp power supply kicked on
a
> > few times if I sent my call very many times in a row, haw.
> >
> >
> > Phil.
> > [log in to unmask]
> >
> >
> >
> > ----- Original Message -----
> > From: "John Miller" <[log in to unmask]>
> > To: <[log in to unmask]>
> > Sent: Sunday, February 22, 2009 5:35 PM
> > Subject: Re: CW DX Contest - you won't believe
> >
> >
> >> better hook that tuner up soon, those finals in that radio probably are
> > hurt
> >> already.
> >> ----- Original Message -----
> >> From: "Phil Scovell" <[log in to unmask]>
> >> To: <[log in to unmask]>
> >> Sent: Sunday, February 22, 2009 6:05 PM
> >> Subject: CW DX Contest - you won't believe
> >>
> >>
> >> > So it went this way and read to the end for the funny part.
> >> >
> >> > I finally got the Icom 7000 to key on CW with the MFJ keyer
> >> > keyboard combination. A friend discovered a jumper wire inside
> >> > the MFJ keyer box that said Direct keying and Gridblock keying.
> >> > It was on Direct so he switched it to gridblock and wouldn't you,
> >> > know, it began keying the radio normally, although the Icom manual
> >> > said nothing about this.
> >> >
> >> > So, Friday, waiting for supper, I tune through 20 meters and
> >> > worked everything I could hear just for the fun of it. About 30
> >> > stations in all. Some were the big loud contest stations running
> >> > big antennas and big power but some I worked, I could hardly copy
> >> > myself; yet they answered. I was running about 60 to 75 watts
> >> > output due to my SWR and no tuner.
> >> >
> >> > Then just before the supper call, I was tuning 40 meters
> >> > about 7 PM. I have had the R7 vertical on my roof for many years
> >> > and used mostly Ten Tec transceivers. Once for about three
> >> > years, I had the Yaesu ft767 on the same R7 vertical on the roof.
> >> > Never once, to my recollection, have I worked, or even copied Q5,
> >> > a European on 40 meters with any of those radios and this vertical
> >> > and believe me, I've tried. Since getting the IC7000 in mid
> >> > November, I have heard many Europeans, to my amazement, and many
> >> > were Q5 copy, too. Friday night, a 50 mile an hour wind storm
> >> > blew into Denver and then it began snowing. It was a literal
> >> > white out for a couple of hours but then just as quickly blew
> >> > itself out. At 7 o'clock that evening was when the storm was
> >> > strongest and I was on 40 meters. I called several of the big
> >> > signals but didn't get through. I also heard several of the
> >> > European big contest stations S9 or better at times but none were
> >> > hearing me except for one. I worked a guy in Sweden, to my
> >> > amazement, and later, I worked a few KH6 and KH7 on the band.
> >> > After supper, learning from one of my kids who had brought his
> >> > family over to eat with us, that the storm was on, I went back out
> >> > to the radio and used the talking watt meter to see what the SWR
> >> > and forward power was. This R7 vertical, at 7.1 is 1.4 to 1 and
> >> > at 7.0 is 5.1 with no tuner running as of yet. My output power at
> >> > 5.1 is about 25 to 32 watts. With the high winds, temperatures
> >> > dropping rapidly below freezing, the snow and all, where I worked
> >> > the Swedish station I was running 6.4 to 1 and had 18 watts
> >> > output. Imagine that! 18 watts and a vertical working Europe
> >> > from Colorado. By the way, at 7.0 it was up 6.7 to one.
> >> >
> >> > I worked someone in the Caribbean, I forget who now, on 15
> >> > meters Saturday morning but even today heard nothing on 15 meters
> >> > or 10 meters. So, under the circumstances, I was quite happy with
> >> > the rigs performance under such limited conditions and not so hot
> >> > band conditions. Now all I need to do is hook up the solid state
> >> > amp and the LDG auto tuner, throw up and 80 and 160 antenna,
> >> > install the 40 meter rotary dipole, and I'll be in business.
> >> >
> >> > Phil.
> >> > [log in to unmask]
> >> >
> >>
> >>
> >> --
> >> No virus found in this incoming message.
> >> Checked by AVG.
> >> Version: 7.5.552 / Virus Database: 270.11.2/1965 - Release Date:
2/21/09
> > 3:36 PM
> >>
> >>
>
>
> --
> No virus found in this incoming message.
> Checked by AVG.
> Version: 7.5.552 / Virus Database: 270.11.2/1965 - Release Date: 2/21/09
3:36 PM
>
>
|
