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@contesting.com] On Behalf Of
jimlux
Sent: Mittwoch, 4. November 2020 00:41
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Where to get LMR 400
On 11/3/20 2:40 PM, dj7ww@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.
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|