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G8MNY > TECH 20.06.19 07:55l 43 Lines 1679 Bytes #999 (0) @ WW
BID : 8967_GB7CIP
Read: GUEST
Subj: 2M DF ing with just a FT290r
Path: IW8PGT<IR2UBX<F1OYP<ON0AR<GB7CIP
Sent: 190620/0555Z @:GB7CIP.#32.GBR.EURO #:8967 [Caterham Surrey GBR] $:8967_GB
From: G8MNY@GB7CIP.#32.GBR.EURO
To : TECH@WW
By G8MNY (New Jun 19)
(8 Bit ASCII graphics use code page 437 or 850, Terminal Font)
I have been using a 2el doppler DF aerial for many years on DF fox hunts, but
ossacionally have toubles with it, & had to revert to just the FT290r & it's
case screened telescopic aerial. This has been supprsingly sucessfull!
________________________________________
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³ (_) ³====³ ³ 5.5000 ³ "" "" \./ ³
³ ÀÄÄÄÄÙ ÀÄÄÄÄÄÄÄÄÙ |__| |__| ³
³ ./"~"\. |__| |__| /~~\ ³
³ /~\ /~\ | | |__| |__| | |³
³ \./ \./ `\._./' |__| [__] \../ ³
ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ
WHAT U HAVE TO DO
1/ To reduce any wrong signal pickup, remove all leads, mic & headphone etc.
2/ Hang the rig on its strap around your neck, tune to Fox frequency, adjust
volume & squelch etc.
3/ Set hight of the telescopic aerial for a mid S meter reading.
4/ Turn around using your body as a signal screen, note the direction for min &
max S meter readings.
5/ If the maximum is opposite the minium, for at least 2 readings, taken a few
meters apart, you should be able to trust that the Fox is in the maximum
reading direction.
6/ Built up areas are full of reflections, eg. Metal fences, Telegraph wires,
Street lamps etc, so do alow for some fauls readings!
IN USE
I have won 2 fox hunts his way so far, but it does help if someone else also
agrees with the direction readings on their rig.
See tech Bul "Doppler DF Aerial Design" & "4 Aerial Doppler RDF".
Why Don't U send an interesting bul?
73 de John, G8MNY @ GB7CIP
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