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G8MNY > TECH 12.04.06 08:06l 100 Lines 5372 Bytes #999 (0) @ WW
BID : 25743_GB7CIP
Read: DL6DBA DL1LCA GUEST
Subj: SIP2300 Generator info
Path: DB0FHN<DB0FOR<DB0SIF<DB0EA<DB0ACC<DB0GOS<DB0RES<ON0AR<GB7CIP
Sent: 060411/2307Z @:GB7CIP.#32.GBR.EU #:25743 [Caterham] $:25743_GB7CIP
From: G8MNY@GB7CIP.#32.GBR.EU
To : TECH@WW
By G8MNY (New Mar 06)
(8 Bit ASCII graphics use code page 437 or 850)
I bought a MEDUSA SIP2300 4 stroke petrol generators as the were so cheap (just
in case we have power cuts!). It is the same generator as the WOLF 2.3KW one!
It is fairly quiet @ 73dBA @ 4M. Large tank gives approx 10 hour run time. It
is not too heavy @ 83kg full, 41kg empty, to move by oneself (only on & off a
trolley!).
Gauge Filler
ÜÜßßßßßßßßßßßßßßßÜÜ Û _..==ÄÄÄÄðððððÄÄÄÄ...._ Û Tube
Û/~~~~~~Tank~~~~~~~\Û Û/" 12L Tank "\Û Cage
Û-------------------Û Fuel Tap Û===========================Û
Û\_____________/~~~~Û & filter\Û|"""""~~~~~~~~~~~~~~~"""""|Û
Û Tap(0) ³elec Û STOPÛ |[] øOK ³ on³ " AC " | Û
ÛChoke // Sol\____Û SWITCHÛ |_ øOil³ º ³ = = = = _| Û 2x13A
ÛÚÄÄÄÄ¿ /~~~~~\\. ÛPull Û³~~""---..........---""~~³³Û
Û³In- ³,' /~~~\//\\ ÛStart Û³F ³ENGINE | | ³³Û
Û³Take³³ ³ ( ) ³ ³ Û Û³A ³ (=)oil ALT | ³³Û
ÛÀÄÄÄÄÙ \ \___/ / Û Û³N ³ _____³_³__|_____| ³³Û
Û Ú' ÚÄÄÄÄÄ¿ `¿ Û ÛÀÄÄÁÄÄÜÙ ÀÜÁÄÄÄÁÙÛ
ß"""""""""""""""""""ß ßßßßßßßßßßßßßßßßßßßßßßßßßßß
I have modified it for /P contesting, to power 2x 400W Valve PAs for as per my
series of buls on "Petrol Gennys for /P SSB". With my rev up modification (add
a solenoid for feed forward compensation) the performance measured...
Generator Unmodified Modified
Load kW Volts Hz Volts Hz
0 250 55 250 55
0.1 240 54 230 55
1.0 225 53 234 55
2.0 Rated 215 51 235 55
2.3 Old Peak 200 49 233 55
2.5 190 47 235 55
3.0 New peak 180 45 33% throttle 220 54 @ FULL THROTTLE!
It is not intended that steady loads over 2KW be used, just speech peaks etc to
go to 3KW peak total load.
At 50Hz you only get 225V O/P, but it is more economical to use lower RPM if the
peak power is not needed!
Other Mods done were..
1/ Add earth bonding from engine, to frame & to the electric panel plate.
2/ Add earth lead & earth clip for external earth stake.
3/ Add engine ignition lead screening & made a screen for the plug cap.
CIRCUIT
I have reverse engineered the diagram...
STOP
ÚÄÄÄÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÂo/oÂÄÄÂÄÄ¿
³gn/ye ³ 2x13A ÃÄÄÄÄÄ¿ External Earth ³ ³ ³ ³
³ / E \ AC / E \ _³_ ³ ³ ³ ³
³ bk ³N___L³ ³N___L³ /// Ú - - - - - - - - - - - - - ¿ ³ ³ ³ ³
³ ÚÄÄÄ´ ÃÄÄÄÄÄ)ÄÄÄÙ front | ÚÄÄÄÂÄÄÄÄÄÄÄÄÄÂÄÄ´<ÃÄÄÄÄÄÄÄÙ ³ ³ ³
³ ³ ÀÄÄÄ)ÄÄÄÄÄ´ panel | _³_ ³ _³_ D1 | ³ ³ ³
³ Run ³ ³ | /_\ ³ Q1\_/ | ³ ³ ³
³ Neon 10A ³ | ³D2 ³ ____/ÃÄÄÄÄÄÄÄÂÄÄÄÄÄÄÄÄÙ ³ ³
³ ³ Trip ³bk | ³ ³ ÃÄ200ÄÙ C1 ³ | bk/wh ³ ³
³ ÀÄÄÄÄÄÄÄ´ ³ | 50 ³ _³_ZD 47u=== | ³ ³
³ ³rd ³ | ³ ³ \_/, 63v ³+ | Oil ³
³ 25u 450v ³ ³ Solenoid | ³ _³_ ~³~ ³ | Neon ³
³ ÚÄ´ÃÄÄ¿(155v) ³ ³-------¿Mod | ³ \_/ 47 ³ | ³ ³
³ ³ ³ ³ ³ ===== ³ | ³ Q2³\__ÃÄÄÄÄÂÄÄÂÄÄÄ¿ ³ | ³ ³
³ ³ ³ ³ ³_(((()_³ | ³ ³ _³_ 1K === 2K ³ | ³ ³
³ ³ye ³ye ³ ³ 0.2ê | ³ ³ /_\D3 ³ ³C2 ³ ³ | ye ³ ³
³ ³ ³ ³ ³ | ÀÄÄÄÁÄÄÄÁÄÄÄÄÁÄÄÁÄÄÄ)ÄÁÄÄÄÄÄÄÄÄÄÄÄÙ ³
³_ ³ _ _ ³ _ _ _ ³ _ _ ³ _ _ _ _ _ _|_ _P_C_B_ _ _ _ _ _ _ ³ _ _|_ _ _ _ _ _³
³ ³or ³or ³rd ³bk | __ oil bk³ bk/wh³
³ ³1.4ê ³ ³1.8ê ³ | Timing |( ÃÄo/oÄÂÄÄÄÄÄÄÄÄÄÙ Ú5KÄÄÄÄ¿ ³
_³_ À(((()Ù ===== À(((()Ù | Pickup |( ÀÄ´ÃÄÄÙ Spark ||(6K ³
/// ==== Ú(((()¿ ===== | -2V _³_ 1n Plug ||(___³
ÀÄ´>ÃÄÙ | //// ||( 1ê
A L T E R N A T O R | C R A N K C A S E M A G N E T O_³_
| ÚÄÄÄÄÄÄÄÄÄ¿ ////
TUBE _³_ gn/ye _³_ FAN
FRAME //// //// COWLING
ELECTRONIC IGNITION
The electronic ignition works in a strange way, as top dead centre approaches a
voltage of -80v or so is made by the magneto primary, this is shorted out when
the timing pulse triggers the SCR shorting this voltage & producing an ignition
voltage in the magneto secondary.
Only one wire from the crankcase handles both the timing & the oil status. If
low oil the crankcase oil switch is not made, & the ignition is killed after
the oil warning neon light was lit for 30 seconds.
Does anyone really understand the operation of this circuit?
Any feedback on the working of it would be appreciated.
Y Don't U send an interesting bul?
73 de John G8MNY @ GB7CIP
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