[TowerTalk] Where to get LMR 400

[dj7ww at t-online.de]

I don´t think that RFS Cellflex 7/8" is mentioned in MIL C-17.

40° at the specified power level are given by the manufactor.

 

73

Peter


 

 	 

Mean Power rating in kW

0,5 MHz

85

 


at 40°C ambient temperature

1 MHz

85

 


 

1,5 MHz

73,1

 


 

2 MHz

63,3

 


 

10 MHz

28,1

 


 

20 MHz

19,7

 


 

30 MHz

16,1

 


 

50 MHz

12,3

 


 

88 MHz

9,22

 


 

100 MHz

8,62

 


 

108 MHz

8,29

 


 

150 MHz

6,98

 

 

 

 

-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of
jimlux
Sent: Mittwoch, 4. November 2020 00:41
To: towertalk at contesting.com
Subject: Re: [TowerTalk] Where to get LMR 400

 

On 11/3/20 2:40 PM, dj7ww at t-online.de wrote:

> I am aware of that, power levels were referenced for 100% duty cycle and

> 40°C ambient temperature.

> 

 

The MIL C-17/74 spec says 25C sea level pressure.

 

Ultimately, it's the melting point of PE that's important.

 

And, of course, PE is a terrible conductor of heat..  I remember doing 

that calculation and it's probably in the TowerTalk archives somewhere.

 

 

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