| |
G8MNY > TECH 18.01.90 09:45l 46 Lines 1862 Bytes #999 (0) @ WW
BID : 49765_GB7CIP
Subj: 2M DF ing with just a FT290r
Path: IZ3LSV<IK6IHL<IK7NXU<HB9ON<DK0WUE<PD0LPM<PI8ZTM<CX2SA<VE3CGR<VE6NAS<
VE2PKT<VE3KPG<GB7CIP
Sent: 260118/0839Z @:GB7CIP.#32.GBR.EURO #:49765 [Caterham Surrey GBR]
From: G8MNY@GB7CIP.#32.GBR.EURO
To : TECH@WW
By G8MNY (Updated Jan 20)
(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 2m DF fox hunts,
but occasionally have trouble with it, and had to revert to just the FT290r and
it's case screened telescopic aerial. This has been surprisingly successful!
S Meter
Shielded ________________________________________
Telescopic³ _ ÚÄÄÄÄ¿ ÚÄÄÄÄÄÄÄÄ¿ /~\ ³Memory
Ant Hole->³ (_) ³====³ ³ 5.5000 ³ "" "" \./ ³
Ú³ ÀÄÄÄÄÙ ÀÄÄÄÄÄÄÄÄÙ |__| |__| ³¿
StrapÀ³ ./"~"\. |__| |__| /~~\ ³Ù
³ /~\ /~\ | | |__| |__| | |³Mic
³ \./ \./ `\._./' |__| [__] \../ ³Socket
ÀÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ
Vol Sq Freq VFO1/2
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 height 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 minimum, 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, e.g. Metal fences, Telegraph wires,
Street lamps etc, so do allow for some false 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
Read previous mail | Read next mail
| |
