Re: Topband: YCCC 9 circle preamp failure test

[чавдар левков]

 Read  

 
http://www.lz1aq.signacor.com/docs/Wide_Mag_loop_prot_v1/wideband_mag_loop_protection.htm
 
  and look at Fig.5 and 6 diagrams. This is the
electric field intensity during nearby lightning strike – up to 50KV  
 [1/m] .  
 The voltage stress at the input capacitor is
extremely high. In our Hi-z amplifier we used 100 pF/1 KV capacitors at input 
and
also have discharging resistors of 1 Mohms. We never  
 had  
 a report
of damaged input. The stress from high power nearby TX is negligible. 

Chavdar lz1aq, 



   lz...@abv.bg  


   www.lz1aq.signacor.com
  
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_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

Re: Topband: 160 is alive!

[Ed Sawyer]

Tom.  I had the same thing going here but thankfully the project was finished a 
couple of weeks ago and this weekend is my “get it back to where it was” 
weekend.  But still, I had one of my 2 T top verticals available and just was 
not on this morning.  Thanks to Tree’s nudge, I am not going to do that again!

 

Ed  N1UR

 

From: Thomas Hoyer [mailto:thoy...@verizon.net] 
Sent: Wednesday, September 25, 2019 3:30 PM
To: sawye...@earthlink.net; topband@contesting.com
Subject: Re: Topband: 160 is alive!

 

Figures Only need a couple more countries for DXCC and my TB antenna is 
down for the next couple months due to a construction project going on in the 
yard. The contractor didn't want to "work around" the guy lines on the vertical 
- which really were in his way - so I took the vertical down temporarily. 

 

Of course this construction project was supposed to be done in June and they 
just got started two weeks ago.

 

Hopefully I'll be back on by mid December and there will be some good DX left 
over (CW only for me). 

 

Need to run a bunch of new radials as the excavation has torn up about 25% of 
them.

 

Tom

W3TA

 





-Original Message-
From: Ed Sawyer 
To: topband 
Sent: Wed, Sep 25, 2019 1:13 pm
Subject: Re: Topband: 160 is alive!

Yes it is.  And all on CW.  I am sorry I was not able to be on this morning.

 

 

 

73

 

 

 

Ed  N1UR

 

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

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

Re: Topband: 160 is alive!

[Thomas Hoyer via Topband]

Figures Only need a couple more countries for DXCC and my TB antenna is 
down for the next couple months due to a construction project going on in the 
yard. The contractor didn't want to "work around" the guy lines on the vertical 
- which really were in his way - so I took the vertical down temporarily.
Of course this construction project was supposed to be done in June and they 
just got started two weeks ago.
Hopefully I'll be back on by mid December and there will be some good DX left 
over (CW only for me). 
Need to run a bunch of new radials as the excavation has torn up about 25% of 
them.
TomW3TA



-Original Message-
From: Ed Sawyer 
To: topband 
Sent: Wed, Sep 25, 2019 1:13 pm
Subject: Re: Topband: 160 is alive!

Yes it is.  And all on CW.  I am sorry I was not able to be on this morning.

 

73

 

Ed  N1UR

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

Re: Topband: 160 is alive!

[Ed Sawyer]

Yes it is.  And all on CW.  I am sorry I was not able to be on this morning.

 

73

 

Ed  N1UR

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

Topband: 160 is alive!!

[Tree]

Very good activity and openings during the past 4 or 5 days here in Oregon.

Worked my first Europeans last weekend and another handful last night.
Some excellent signals from Northern Europe.  This morning, both A35 and
3D2 were active.  The 3D2 peaked up many S-units just after sunrise and was
in the log even though he was dealing with S9+20db QRN.  Also worked VK6
twice during the past few mornings along with some new JA callsigns.

Seems like promising signs for a great season on 160.

73 Tree N6TR/7
Manning, OR
_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector