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No so, only in the UK generally, and 10w erp
has been authorised in the past, other countries 20 plus watts
erp.
If you have a vy small antenna you would need
around 5Kw to get 1w erp and would need about 10 T-200 toroids stacked times 2
for your filter.
The trend in the past on 137 has been to work long
haul with the odd local QSO.
mal/g3kev
----- Original Message -----
Sent: Sunday, July 25, 2010 7:39 PM
Subject: Re: LF: Re: 136kHz LPF
toroids?
Hi Mal,
You wrote :-
The aim on this
band is for at least 1W erp
The maximum allowed ERP for this
band (136kHz) is 1 watt ERP.
73
Gary - G4WGT.
On 25 July 2010 19:19, mal hamilton <[email protected]>
wrote:
Roger
A T- 200 is ideal but maybe too large for u.
Except you have a large antenna 20w is not enough on 137 for any serious
impact.
The aim on this band is for at least 1W
erp
de mal/g3kev
----- Original Message -----
Sent: Sunday, July 25, 2010 6:58
PM
Subject: LF: 136kHz LPF
toroids?
Some advice please....
- I'm about to construct a 136kHz transverter with an output power up
to 20W. What's the best choice of toroid for the TX output low
pass filter inductors for this sort of power level? Around 54uH is
required and this is rather too much for a T50 (red) toroid that I used
on 500kHz. I don't want anything too physically large if I can avoid it.
- Also, are there any readily available canned inductors (or toroids)
suitable for use as the input tuned circuit on RX? Something like the
KANK3333 inductors from Toko? Again, nothing too big unless this is a
necessity for large signal handling.
Thanks in advance for
inputs.
73s
Roger G3XBM
--
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
http://www.youtube.com/user/g3xbm
G3XBM
GQRP 1678 ISWL
G11088
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