Re: Topband: OT: Studying the ionosphere using RBN

[N7KA]

I went to tHel PNW to view this total solar eclipse.  Found a place about 1 
hour east of Portland, Ore a few miles south of the Columbia River Gorge with 
low horizons with clear skies, a rare event.  At sunrise birds started singing 
and 10M  opened to the east coast.  As the eclipse started to occur causing 
sunset (it was maybed out 8:30 to 9:00 AM PST, the birds stopped singing, the 
10M opening to the eASeAST COAST WENT AWAY  

Arne N7KA
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Re: Topband: OT: Studying the ionosphere using RBN

[W7RH]

I found the discussion listed by N4HY to be an interesting read.

In 1979 thee was a total solar eclipse of the Western US which occurred 
several hours after sunrise. The solar display was incredible and radio 
propagation was very much so enhanced on 160 with openings to East Coast 
of the US and mid-West.


Bob,

W7RH

--
W7RH DM35OS

Only two things are infinite, the universe and human stupidity, and I'm not 
sure about the former.

Albert Einstein


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Re: Topband: best headphones for cw

[JC]

Some headphone can isolate noise very well. I like the Sennheiser HD280 , it
provide 36db isolation, but the best one I have is the MC5 from Etymotic ear
plug that can reach 42 db isolation. 

73'
JC
N4IS


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Re: Topband: best headphones for cw

[Richard (Rick) Karlquist]

I have a pair of Sony noise cancelling phones.
Once you try NC phones, you will never go
back to conventional ones.  Now if we could
just get someone to make a set with a microphone.
But you asked about CW, so that doesn't matter.
There is an issue with RF getting into them,
so they might not be good for multi op stations.
For single op, your sidetone might sound weird.
Obviously, that is highly variable and you have
to just try it and see.  YMMV.

Rick N6RK

On 6/17/2016 3:55 PM, n0...@juno.com wrote:

I like my QC-15 noise cancelling headphones!  Worth
the money and they DO cancel-out fan noise from the
K3 and my KW amp.  I don't have any clacking
relays when I key, so I can't comment on that.  I use
an adapter for the 1/8" plug on the QC's.

73,
Charlie, N0TT

On Fri, 17 Jun 2016 16:07:33 -0400 Charles Yahrling
 writes:

Looking for tips for headphone types for K3, CW only, so need 1/4
inch
stereo jack.

Object is to isolate from ambient noise in the shack, such as relay
clatter
from 1K-FA amp when keying.

Been using a cheap set that came with Yamaha keyboard - I like how
they
attenuate hi freq band noise, but
tend to overdrive at high audio gain levels. Main problem is relay
noise,
which throws off my keying at times.

tnx in advance

73, chuck AB1VL
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Re: Topband: best headphones for cw

[n0tt1]

I like my QC-15 noise cancelling headphones!  Worth
the money and they DO cancel-out fan noise from the
K3 and my KW amp.  I don't have any clacking
relays when I key, so I can't comment on that.  I use 
an adapter for the 1/8" plug on the QC's.
 
73,
Charlie, N0TT

On Fri, 17 Jun 2016 16:07:33 -0400 Charles Yahrling
 writes:
> Looking for tips for headphone types for K3, CW only, so need 1/4 
> inch
> stereo jack.
> 
> Object is to isolate from ambient noise in the shack, such as relay 
> clatter
> from 1K-FA amp when keying.
> 
> Been using a cheap set that came with Yamaha keyboard - I like how 
> they
> attenuate hi freq band noise, but
> tend to overdrive at high audio gain levels. Main problem is relay 
> noise,
> which throws off my keying at times.
> 
> tnx in advance
> 
> 73, chuck AB1VL
> _
> Topband Reflector Archives - http://www.contesting.com/_topband
> 

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Re: Topband: best headphones for cw

[HAROLD SMITH JR]

Hi Chuck, I am using a pair of Koss KO.727s headphones. They work very nice 
with my K3 and my Yaesu FT920 and FT1000. I have been using them for years and 
like them very well. I see that the Koss KO.727b is listed on eBay. 73Price 
 W0RI

  From: Charles Yahrling 
 To: Topband@contesting.com 
 Sent: Friday, June 17, 2016 3:07 PM
 Subject: Topband: best headphones for cw
   
Looking for tips for headphone types for K3, CW only, so need 1/4 inch
stereo jack.

Object is to isolate from ambient noise in the shack, such as relay clatter
from 1K-FA amp when keying.

Been using a cheap set that came with Yamaha keyboard - I like how they
attenuate hi freq band noise, but
tend to overdrive at high audio gain levels. Main problem is relay noise,
which throws off my keying at times.

tnx in advance

73, chuck AB1VL
_
Topband Reflector Archives - http://www.contesting.com/_topband


  
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Topband Reflector Archives - http://www.contesting.com/_topband

Topband: best headphones for cw

[Charles Yahrling]

Looking for tips for headphone types for K3, CW only, so need 1/4 inch
stereo jack.

Object is to isolate from ambient noise in the shack, such as relay clatter
from 1K-FA amp when keying.

Been using a cheap set that came with Yamaha keyboard - I like how they
attenuate hi freq band noise, but
tend to overdrive at high audio gain levels. Main problem is relay noise,
which throws off my keying at times.

tnx in advance

73, chuck AB1VL
_
Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: folded umbrella for 160 meter

[Herbert Schoenbohm]

Problem with the "folded umbrella" on 160 is that when the angle of 
declivity is to acute serious cancellation takes place.  Also the feed 
of such an antenna is sometimes is very complex.  I think this style of 
antenna has faded from popularity since the Marconi "T" is so much 
easier to construct.  All you need is to 50-60 foot poles, preferably 
wooden or just trees 120 feet apart or more with a top wire of 120 feet 
fed exactly with a drop wire in the center.  This is far easier to 
construct and relatively easy to feed. Aesthetically it look better and 
depending on the wire size it can be made to be practically invisible 
from a distance.  As in either case a good ground system is very important.



On 6/17/2016 9:45 AM, wo4r_jeff--- via Topband wrote:

In searching the archives I see a little discussion of the folded umbrella 
antenna.  This looks interesting.  Just thought I would see what the folks on 
this list think about it
Jeff WO4R
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Topband: folded umbrella for 160 meter

[wo4r_jeff--- via Topband]

In searching the archives I see a little discussion of the folded umbrella 
antenna.  This looks interesting.  Just thought I would see what the folks on 
this list think about it
Jeff WO4R
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Topband Reflector Archives - http://www.contesting.com/_topband