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  • Rotator Alinco info

    From G8MNY@21:5/101 to TECH on Wed Jul 10 06:40:58 2019
    R:190710/0930Z @:LU6DJ.#SPED.BA.ARG.SOAM #:64254 [San Pedro] $:11898_GB7CIP R:190710/0930Z @:LU1DBQ.#MOR.BA.ARG.SOAM #:21023 [MORON] $:11898_GB7CIP R:190710/0930Z @:HP2BWJ.COL.PAN.CEAM #:48196 [Colon,Panama] FBB7.00e R:190710/0925Z @:LU4ECL.LP.BA.ARG.SOAM #:4879 [La Plata] FBB7.0.8-beta2 R:190710/0925Z 4471@I0OJJ.ITA.EU [Rome] $:11898_GB7CIP
    R:190710/0923Z @:GB7CIP.#32.GBR.EURO #:11898 [Caterham Surrey GBR]

    From: G8MNY@GB7CIP.#32.GBR.EURO

    To : TECH@WW

    By G8MNY (updated Aug 17)
    (8 Bit ASCII graphics use code page 437 or 850, Terminal Font)

    This is basic & reliable rotator with manual switch controls & regulated meter heading readout.
    ___________ ___ /║║\ Stub Mast
    │ ┌───────┐ │ \ │ ║║ │ Clamp Castings
    │ │ .-"-. │ │ \ _│_║║_│_
    │ │'_____`│ │ │ / \
    │ 0 │ │ 6 Wire │__________│ ROTATOR 2 drilled
    │ --------- │ │ Cable │________│ steel strips
    │ │o│ [I] │ _.┘ │ ║║ │ └ option flat ┌──────┐ │___________│_.-' Support │ ║║ │ base plate / /P Cow \
    CONTROLLER Mast Clamp \║║/ remove clamp /field feet\


    For /P use cow field feet strips, then a 66ft mast can be put on top of it with a 3el HF TH33 & 5el 6m beam etc, without the rotator spinning on the ground.

    DIAGRAM
    L─o──o┬─┐ ┌────┬─────┬──────8Ω──────────────────────────* 6 *───────┐
    Fuse│ )║( │ │ added AC Common │
    240V│ )║( │ │ │
    0.5u=== )║( 24V │ 33Ω Left 2x8Ω │
    added│ )║( │ │ ┌─o\ o───┬──────────────* 5 *─())))─┤
    │ )║( │ │ │ ===130uF AC ===== │ N─o/'o┴─┘ ├─────)─────)──────────┴─o/ o───┴──────────────* 4 *─())))─┘
    ON │ │ _│_ Right MOTOR
    │ 120Ω \_/
    │added│ ├───┬─────┐
    │ │ │ 470Ω │/' 8.5V
    │ │ │ ├───┤ REGULATOR added
    │ │ │ │ │\e FB3,,
    │ │ │ │ └──100Ω──┬───────────────* 2 *────┐
    │ LAMP +│ │ │ _'' │
    │ │ === ├───┐ 10n=== /~ ~\ CAL ROTOR
    │ │ 470u│ _│_ `\│ ,, ├──┤Meter├──8k──* 3 *──>POT
    │ │ │ '/_\ ├─┬──────┤ -\._./+ PRESET 500R
    │ │ │ 9V│ e/│ │ ''FB │ │
    │ │ │ │ │ ===1n 27Ω ,, │
    └─────┴─────┴───┴───┴───┴──────┴───────────────* 1 *────┘
    CURRENT LIMITER FB2''
    added * = External Connection

    N.B. *1* to *6* = 24V AC could be useful for things!

    The circuit could have been wired to use only 5 wires if the switch feed & AC common were reversed, making 1 the new AC common to the motor, as well as the pot earth.

    MODS
    1/ As with most rotators the motor is well over run, so if high usage (eg. more
    than 2 mins) is needed, then add a high wattage low value R (eg. 8Ω 10W) in
    series with the motor common (*6*). This will increase motor run time before
    it overheats, without significantly reducing the available torque.

    2/ Under running the lamp with 120R in series will increase its life. Silver
    foil the meter sides, & paint the top of the lamp white, this makes the
    lamp as bright as before & with less shadows.

    3/ Also a 0u5 250V AC Cap across the mains will correct the transformer's power
    factor for /P operation (but not the motor run PF!).

    4/ QRO on lower HF bands gets into the current limit transistor & reduces the
    meter reading, as a single FB on the base is not enough. FB2 has 5 turns &
    is in the cut PCB track. FB3 is just on the lead.


    Why Don't U send an interesting Bul?

    73 de John G8MNY @ GB7CIP

    --- Mystic BBS v1.12 A43 (Linux/32)
    * Origin: HAMRADIO telnet lu9dce.dynu.com (21:5/101)