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GM0CSZ > QRP 22.06.05 14:04l 34 Lines 1222 Bytes #999 (0) @ WW
BID : C71988GM0CSZ
Read: GUEST DG9NBR
Subj: Re: Help with PA circuit
Path: DB0FHN<DB0MRW<DB0ERF<DB0FBB<DB0IUZ<DB0GOS<DB0EEO<DB0RES<ON0AR<GB7FCR<
GB7FUR<GB7IOM<GB7SAN<GB7INV<GB7NOS
Sent: 050619/2339Z @:GB7NOS.#76.GBR.EU #:36322 [Golspie] FBB7.00i $:C71988GM0CS
From: GM0CSZ@GB7NOS.#76.GBR.EU
To : QRP@WW
ZL4AJS wrote:-
>
> This design is completely from scratch by me, because I have never seen a
> design for a 5W PA. Maybe someone out there can supply one or give me some
> advice on what to do.
>
> It only needs to cover 80m and 40m.
=============================
For 5W output a cheap and common device is the MOSFET IRF510 ,popular
within the QRP community with umpteen designs /examples available.
No doubt some of your local fellow radio amateurs are member of or can
provide a link with the G-QRP Club . If not I'll be happy to send you some
info .
In the G-QRP mag SPRAT of Spring 2005 there is an 80/40 metres 6 V ,5Watts
CW transmitter with full band cover and single knob tuning. Here the PA
has 2 pcs IRF510 in push pull (because of the low power supply voltage .
With 12V power supply 1 pce IRF510 will suffice. The design is by Chas
Fletcher ,G3DXZ.
73 - Frank , GM0CSZ @ GB7NOS.#76.GBR.EU
Inver by Tain , IV20 1RX Scotland UK Loc: IO87AT
e-mail: gm0csz.kn6wh@dsl.pipex.com
Also in 2005 they say the future is bright ; 2 of its challenges remaining
to be RENEWABLE ENERGY and LINUX.
Message timed: 22:28 UTC on 19 Jun 2005
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