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From g8mny%gb7cip.#32.gbr.euro@i0ojj.ampr.org Thu Jul 11 08:04:18 2019 Received: from i0ojj.ampr.org by i0ojj.ampr.org (JNOS2.0k.3b) with SMTP

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From: g8mny@gb7cip.#32.gbr.euro

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From: G8MNY@GB7CIP.#32.GBR.EURO
To : TECH@WW

By G8MNY (New Jan 06)
(8 Bit ASCII graphics use code page 437 or 850, Terminal Font)

This is small basic & reliable rotator with pot control & self hunting etc.
_
==║]│ Small Dia Stub
____________________________ ║ │ Pole Clamps
/ ___ _ _ / │ ==║]│
/ / _ \ __ / │ ┌─────╨─┴───┐
/ │ (_) │ / / / │ 6 Wire _│___________│_ ROTATOR
\___ / /_/ / │ Cable │___________│
/_ _ _ _ _ _ _ _ _ _ _ _ _ / _.┘ ===║]|│ - - option flat │__________________________│_.-' ║ |│ base plate
CONTROLLER Support U ===║]|│ remove bolts
Mast Clamps ╙─┴┘

DIAGRAM
N─o/'o─┐ ┌─────┬──────────────────────────────────────────*6*───────┐
)║( └─┤<├──────2k2──┤<├─┐ AC Common \ Thermal
240V )║( RUN// CW │ │ Trip
)║( 24V LED ┌─o\────┬──────┴──────────────────────*5*─())))─┤
)║( │ === 68uF 60v AC ===== │MOTOR
)║ └──────────┴─o/────┴─────────────────────────────*4*─())))─┘
│ ║ CCW
o ║ ┌─────┬─┤>├─┬──┬──────┬─────120Ω──┬────┬─────────────┐
FUSE | ║(12V _│_ │ R ┌───┴───┐ _│_ │ +10V Cal1\│/
o ║(___ /_\ │ │ │ C W │ 10V/_\' │ ┌─3k──*1*──┐ L─o/'o─┘ ║( │ │ +16V│ _│_ └───┬───┘ │ │ │ │
on/off ║(12V│ │ │ \_/≡ ├──┐NPN │ 7│ 3 HEADING │
│ ├──)──)─┤>├─┤ │ON _│_ \│__ │ 741/├──((()─>POT │ E────────┘_│_ │ │ │ │ /_\ e/│ ├─R─)──<' │± 200Ω ROTATOR
/_\ └──)─────)──┴─────┬┴─┬┴────)───┤ 2 `\├──((()───)────*2*─>POT
│ │ +│ _│_ e\│___│ │ 4│ 2 RFC │ 200Ω
│ │ === /_\ /│ │ │ │ │
│ │ 100u│ ├──┘PNP │ │ └─3k──*3*──┘
│ │ │ ┌───┴───┐ _│_ │ Cal2 /│\
│ │ -16V│ │ C C W │ 10V /_\' │ │
│ │ │ └───┬───┘ │ │ -10V │
└─────┴─────┴────────┴──────120Ω──┴────┴─────────────┘
(N.B. Incomplete diagram) * External Connections

DESCRIPTION
Two relays power the 2 pole AC rotator motor on either line 4 or 5. The Run LED is lit when either is powered as either 24V AC or via the phase shift AC capacitor. The relays are operated by the opamp & either driver transistor. The opamp inputs are feed via RF filtering components with the bridge output, comparing the slider voltage of the controller & rotator pots. The cal presets enable calibration of ±180° positions (south).

IN USE
Although a very small rototor, I have used an enoumous 55el 23cms TONNA beam 5.5m long on one at 10m for many years. But to keep bearing strain down I use only a 3cm x 30cm long stub pole.


Why Don't U send an interesting Bul?

73 de John G8MNY @ GB7CIP



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