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G8MNY > TECH 30.03.24 11:40l 75 Lines 3618 Bytes #999 (0) @ WW
BID : 4383_GB7CIP
Read: GUEST IU4JRU
Subj: Rotator Alinco info
Path: IZ3LSV<I0OJJ<GB7CIP
Sent: 240330/1032Z @:GB7CIP.#32.GBR.EURO #:4383 [Caterham Surrey GBR] $:4383_GB
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.
___________ ___ /ºº\ Stub Mast
³ ÚÄÄÄÄÄÄÄ¿ ³ \ ³ ºº ³ Clamp Castings
³ ³ .-"-. ³ ³ \ _³_ºº_³_
³ ³'_____`³ ³ ³ / \
³ 0 ³ ³ 6 Wire ³__________³ ROTATOR 2 drilled
³ --------- ³ ³ Cable ³________³ steel strips
³ ³o³ [I] ³ _.Ù ³ ºº ³ À option flat ÚÄÄÄÄÄÄ¿
³___________³_.-' Support ³ ºº ³ base plate / /P Cow \
CONTROLLER Mast Clamp \ºº/ 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
LÄoÄÄoÂÄ¿ ÚÄÄÄÄÂÄÄÄÄÄÂÄÄÄÄÄÄ8RÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ* 6 *ÄÄÄÄÄÄÄ¿
Fuse³ )º( ³ ³ added AC Common ³
240V³ )º( ³ ³ ³
0.5u=== )º( 24V ³ 33R Left 2x8R ³
added³ )º( ³ ³ ÚÄo\ oÄÄÄÂÄÄÄÄÄÄÄÄÄÄÄÄÄÄ* 5 *Ä())))Ä´
³ )º( ³ ³ ³ ===130uF AC ===== ³
NÄo/'oÁÄÙ ÃÄÄÄÄÄ)ÄÄÄÄÄ)ÄÄÄÄÄÄÄÄÄÄÁÄo/ oÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÄÄÄ* 4 *Ä())))ÄÙ
ON ³ ³ _³_ Right MOTOR
³ 120R \_/
³added³ ÃÄÄÄÂÄÄÄÄÄ¿
³ ³ ³ 470R ³/' 8.5V
³ ³ ³ ÃÄÄÄ´ REGULATOR added
³ ³ ³ ³ ³\e FB3,,
³ ³ ³ ³ ÀÄÄ100RÄÄÂÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ* 2 *ÄÄÄÄ¿
³ LAMP +³ ³ ³ _'' ³
³ ³ === ÃÄÄÄ¿ 10n=== /~ ~\ CAL ROTOR
³ ³ 470u³ _³_ `\³ ,, ÃÄÄ´MeterÃÄÄ8KÄÄ* 3 *ÄÄ>POT
³ ³ ³ '/_\ ÃÄÂÄÄÄÄÄÄ´ -\._./+ PRESET 500R
³ ³ ³ 9V³ e/³ ³ ''FB ³ ³
³ ³ ³ ³ ³ ===1n 27R ,, ³
ÀÄÄÄÄÄÁÄÄÄÄÄÁÄÄÄÁÄÄÄÁÄÄÄÁÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ* 1 *ÄÄÄÄÙ
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. 8R 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
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